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DQualified for Automotive Applications
D150-mA Low-Dropout Regulator
DOutput Voltage: 5 V, 3.8 V, 3.3 V, 3 V, 2.8 V,
2.7 V, 2.5 V, 1.8 V, 1.6 V and Variable
DDropout Voltage, Typically 300 mV
at 150 mA
DThermal Protection
DOvercurrent Limitation
DLess Than 2-µA Quiescent Current in
Shutdown Mode
D−40°C to 125°C Operating Junction
Temperature Range
D5-Pin SOT-23 (DBV) Package
description
The TPS763xx family of low-dropout (LDO) voltage regulators offers the benefits of low-dropout voltage, low-power
operation, and miniaturized packaging. These regulators feature low dropout voltages and quiescent currents compared
to conventional LDO regulators. Offered in a 5-terminal, small outline integrated-circuit SOT-23 package, the TPS763xx
series devices are ideal for cost-sensitive designs and for applications where board space is at a premium.
A combination of new circuit design and process innovation has enabled the usual pnp pass transistor to be replaced by
a PMOS pass element. Because the PMOS pass element behaves as a low-value resistor, the dropout voltage is
low—typically 300 mV at 150 mA of load current (TPS76333)—and is directly proportional to the load current. Since the
PMOS pass element is a voltage-driven device, the quiescent current is low (140 µA maximum) and is stable over the entire
range of output load current (0 mA to 150 mA). Intended for use in portable systems such as laptops and cellular phones,
the low-dropout voltage feature and low-power operation result in a significant increase in system battery operating life.
The TPS763xx also features a logic-enabled sleep mode to shut down the regulator, reducing quiescent current to 1 µA
maximum at T J = 25°C.The TPS763xx is offered in 1.6-V,1.8-V, 2.5-V, 2.7-V, 2.8-V, 3-V, 3.3-V, 3.8-V, and 5-V fixed-voltage
versions and in a variable version (programmable over the range of 1.5 V to 6.5 V).
AVAILABLE OPTIONS{
TJVOLTAGE PACKAGE}PART NUMBER SYMBOL
Variable TPS76301QDBVRQ1 BAN
1.6 V TPS76316QDBVRQ1 BAD
1.8 V TPS76318QDBVRQ1 BAP
2.5 V TPS76325QDBVRQ1 BAQ
−40°C to 125°C
2.7 V
SOT-23
TPS76327QDBVRQ1§
−40°C to 125°C2.8 V
SOT-23
(DBV) TPS76328QDBVRQ1§
3 V
(DBV)
TPS76330QDBVRQ1 BAT
3.3 V TPS76333QDBVRQ1 BAU
3.8 V TPS76338QDBVRQ1§
5.0 V TPS76350QDBVRQ1 BAW
†For the most current package and ordering information, see the Package Option Addendum at
the end of this document, or see the TI web site at http://www.ti.com.
‡Package drawings, thermal data, and symbolization are available at http://www.ti.com/packaging.
§Product Preview. Contact Texas Instruments for availability.
Copyright 2008 Texas Instruments Incorporated
!"# $ %&!!'# "$ (&)*%"# +"#', !+&%#$
%! # $('%%"#$ ('! #-' #'!$ '."$ $#!&'#$ $#"+"!+ /"!!"#0,
!+&%# (!%'$$1 +'$ # '%'$$"!*0 %*&+' #'$#1 "** ("!"'#'!$,
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
3
2
4
5
DBV PACKAGE
(TOP VIEW)
1
IN
GND
EN
OUT
NC/FB
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2
functional block diagram
TPS76301
OUT
IN
FB
GND
EN
VREF
TPS76316/ 18/ 25/ 27/ 28/ 30/ 33/ 38/ 50
OUT
IN
GND
EN
VREF
Current Limit/
Thermal
Protection
Current Limit/
Thermal
Protection
Terminal Functions
TERMINAL
DESCRIPTION
NAME
DESCRIPTION
GND Ground
EN Enable input
FB Feedback voltage (TPS76301 only)
IN Input supply voltage
NC No connection (fixed-voltage option only)
OUT Regulated output voltage
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3
absolute maximum ratings over operating free-air temperature range (unless otherwise
noted)(1)
Input voltage range(2) −0.3 V to 10 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range at EN −0.3 V to VI + 0.3 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage on OUT, FB 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Peak output current Internally limited. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ESD rating, HBM 2 kV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation See Dissipation Rating Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating junction temperature range, TJ −40°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg −65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltage values are with respect to network ground terminal.
DISSIPATION RATING TABLE
BOARD PACKAGE RθJC RθJA DERATING FACTOR
ABOVE TA = 25°CTA ≤ 25°C
POWER RATING TA = 70°C
POWER RATING TA = 85°C
POWER RATING
Low K(1) DBV 65.8°C/W 259°C/W 3.9 mW/°C386 mW 212 mW 154 mW
High K(2) DBV 65.8°C/W 180°C/W 5.6 mW/°C555 mW 305 mW 222 mW
(1) The JEDEC Low K (1s) board design used to derive this data was a 3 inch x 3 inch, two layer board with 2 ounce copper traces on top of the
board.
(2) The JEDEC High K (2s2p) board design used to derive this data was a 3 inch x 3 inch, multilayer board with 1 ounce internal power and ground
planes and 2 ounce copper traces on top and bottom of the board.
recommended operating conditions MIN NOM MAX UNIT
Input voltage, VI(1) 2.7 10 V
Continuous output current, IO0 150 mA
Operating junction temperature, TJ−40 125 °C
(1) To calculate the minimum input voltage for your maximum output current, use the following equation:
VI(min) = VO(max) + VDO(max load)
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4
electrical characteristics over recommended operating free-air temperature range,
VI = VO(typ) + 1 V, IO = 1 mA, EN = IN, Co = 4.7 µF (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
3.25 V > VI ≥ 2.7 V,
2.5 V ≥ VO ≥ 1.5 V, IO = 1 mA to 75 mA,
TJ = 25°C0.98VOVO1.02VO
3.25 V > VI ≥ 2.7 V,
2.5 V ≥ VO ≥ 1.5 V IO = 1 mA to 75 mA, 0.97VOVO1.03VO
TPS76301
VI ≥ 3.25 V,
5 V ≥ VO ≥ 1.5 V IO = 1 mA to 100 mA,
TJ = 25°C0.98VOVO1.02VO
V
TPS76301 VI ≥ 3.25 V,
5 V ≥ VO ≥ 1.5 V IO = 1 mA to 100 mA, 0.97VOVO1.03VOV
VI ≥ 3.25 V,
5 V ≥ VO ≥ 1.5 V IO = 1 mA to 150 mA,
TJ = 25°C0.975VOVO1.025VO
VI ≥ 3.25 V,
5 V ≥ VO ≥ 1.5 V IO = 1 mA to 150 mA, 0.9625VOVO1.0375VO
VI = 2.7 V, 1 mA< IO < 75 mA,
TJ = 25°C1.568 1.6 1.632
VI = 2.7 V, 1 mA< IO < 75 mA 1.552 1.6 1.648
TPS76316
VI = 3.25 V, 1 mA < IO < 100 mA,
TJ = 25°C1.568 1.6 1.632
V
TPS76316
VI = 3.25 V, 1 mA < IO < 100 mA 1.552 1.6 1.648
V
VI = 3.25 V, 1 mA < IO < 150 mA,
TJ = 25°C1.56 1.6 1.640
VI = 3.25 V, 1 mA < IO < 150 mA 1.536 1.6 1.664
VI = 2.7 V, 1 mA< IO < 75 mA,
TJ = 25°C1.764 1.8 1.836
VO
Output voltage
VI = 2.7 V, 1 mA< IO < 75 mA 1.746 1.8 1.854
VOOutput voltage
TPS76318
VI = 3.25 V, 1 mA < IO < 100 mA,
TJ = 25°C1.764 1.8 1.836
V
TPS76318
VI = 3.25 V, 1 mA < IO < 100 mA 1.746 1.8 1.854
V
VI = 3.25 V, 1 mA < IO < 150 mA,
TJ = 25°C1.755 1.8 1.845
VI = 3.25 V, 1 mA < IO < 150 mA 1.733 1.8 1.867
IO = 1 mA to 100 mA, TJ = 25°C 2.45 2.5 2.55
TPS76325
IO = 1 mA to 100 mA 2.425 2.5 2.575
V
TPS76325 IO = 1 mA to 150 mA, TJ = 25°C 2.438 2.5 2.562 V
IO = 1 mA to 150 mA 2.407 2.5 2.593
IO = 1 mA to 100 mA, TJ = 25°C 2.646 2.7 2.754
TPS76327
IO = 1 mA to 100 mA 2.619 2.7 2.781
V
TPS76327 IO = 1 mA to 150 mA, TJ = 25°C 2.632 2.7 2.767 V
IO = 1 mA to 150 mA 2.599 2.7 2.801
IO = 1 mA to 100 mA, TJ = 25°C 2.744 2.8 2.856
TPS76328
IO = 1 mA to 100 mA 2.716 2.8 2.884
V
TPS76328 IO = 1 mA to 150 mA, TJ = 25°C 2.73 2.8 2.87 V
IO = 1 mA to 150 mA 2.695 2.8 2.905
IO = 1 mA to 100 mA, TJ = 25°C 2.94 3 3.06
TPS76330
IO = 1 mA to 100 mA 2.91 3 3.09
V
TPS76330
IO = 1 mA to 150 mA, TJ = 25°C 2.925 3 3.075
V
IO = 1 mA to 150 mA 2.888 3 3.112
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electrical characteristics over recommended operating free-air temperature range,
VI = VO(typ) + 1 V, IO = 1 mA, EN = IN, Co = 4.7 µF (unless otherwise noted) (continued)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
IO = 1 mA to 100 mA, TJ = 25°C 3.234 3.3 3.366
TPS76333
IO = 1 mA to 100 mA 3.201 3.3 3.399
V
TPS76333 IO = 1 mA to 150 mA, TJ = 25°C 3.218 3.3 3.382 V
IO = 1 mA to 150 mA 3.177 3.3 3.423
IO = 1 mA to 100 mA, TJ = 25°C 3.724 3.8 3.876
VO
Output voltage
TPS76338
IO = 1 mA to 100 mA 3.705 3.8 3.895
V
VOOutput voltage TPS76338 IO = 1 mA to 150 mA, TJ = 25°C 3.686 3.8 3.914 V
IO = 1 mA to 150 mA 3.667 3.8 3.933
IO = 1 mA to 100 mA, TJ = 25°C 4.875 5 5.125
TPS76350
IO = 1 mA to 100 mA 4.825 5 5.175
V
TPS76350 IO = 1 mA to 150 mA, TJ = 25°C 4.750 5 5.15 V
IO = 1 mA to 150 mA 4.80 5 5.20
I(Q)
Quiescent current
IO = 0 to 150 mA, TJ = 25°C (1) 85 100
I(Q)
Quiescent current
(GND terminal current) IO = 0 to 150 mA see (2) 140
A
Standby current
EN < 0.5 V, TJ = 25°C 0.5 1 µA
Standby current EN < 0.5 V 2
VnOutput noise voltage BW = 300 Hz to 50 kHz,
TJ = 25°C, Co = 10 µF (2) 140 µV
PSRR Ripple rejection f = 1 kHz, Co = 10 µF, TJ = 25°C (2) 60 dB
Current limit TJ = 25°C, see (3) 0.5 0.8 1.5 A
Output voltage line regulation
(3)
VO + 1 V < VI ≤ 10 V, VI ≥ 3.5 V, TJ = 25°C 0.04 0.07
%/V
Output voltage line regulation
(∆VO/VO), (see (3))VO + 1 V < VI ≤ 10 V, VI ≥ 3.5 V 0.1 %/V
VIH EN high level input See (2) 1.4 2
V
VIL EN low level input See (2) 0.5 1.2 V
II
EN input current
EN = 0 V −0.01 −0.5
A
IIEN input current EN = IN −0.01 −0.5 µA
(1) Minimum IN operating voltage is 2.7 V or VO(typ) + 1 V, whichever is greater.
(2) Test condition includes: output voltage VO = 0 V (for variable device FB is shorted to VO) and pulse duration = 10 ms.
(3) If VO < 2.5 V and VImax = 10 V, VImin = 3.5 V:
Line Reg. (mV) +ǒ%ńVǓ VOǒVImax *3.5 VǓ
100 1000
If VO > 2.5 V and VImax = 10 V, VImin = VO + 1 V:
Line Reg. (mV) +ǒ%ńVǓ
VOǒVImax *ǒVO)1ǓǓ
100 1000
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electrical characteristics over recommended operating free-air temperature range,
VI = VO(typ) + 1 V, IO = 1 mA, EN = IN, Co = 4.7 µF (unless otherwise noted) (continued)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
IO = 0 mA, TJ = 25°C 0.2
IO = 1 mA, TJ = 25°C 3
IO = 50 mA, TJ = 25°C 120 150
IO = 50 mA 200
TPS76325
IO = 75 mA, TJ = 25°C 180 225
mV
TPS76325 IO = 75 mA 300 mV
IO = 100 mA, TJ = 25°C 240 300
IO = 100 mA 400
IO = 150 mA, TJ = 25°C 360 450
IO = 150 mA 600
IO = 0 mA, TJ = 25°C 0.2
IO = 1 mA, TJ = 25°C 3
IO = 50 mA, TJ = 25°C 100 125
IO = 50 mA 166
VDO
Dropout voltage
TPS76333
IO = 75 mA, TJ = 25°C 150 188
mV
V
DO
Dropout voltage
TPS76333 IO = 75 mA 250 mV
IO = 100 mA, TJ = 25°C 200 250
IO = 100 mA 333
IO = 150 mA, TJ = 25°C 300 375
IO = 150 mA 500
IO = 0 mA, TJ = 25°C 0.2
IO = 1 mA, TJ = 25°C 2
IO = 50 mA, TJ = 25°C 60 75
IO = 50 mA 100
TPS76350
IO = 75 mA, TJ = 25°C 90 113
mV
TPS76350
IO = 75 mA 150
mV
IO = 100 mA, TJ = 25°C 120 150
IO = 100 mA 200
IO = 150 mA, TJ = 25°C 180 225
IO = 150 mA 300
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7
TYPICAL CHARACTERISTICS
Figure 1
IO − Output Current − mA
TPS76325
OUTPUT VOLTAGE
vs
OUTPUT CURRENT
2.5
2.485
2.475 30 90
2.495
2.49
2.48
60 120 180
2.505
0 150
VI = 3.5 V
CI = CO = 4.7 µF
TJ = 25°C
− Output Voltage − V
VO
Figure 2
IO − Output Current − mA
1.795
1.780
1.770 30 90
1.790
1.785
1.775
60 120 180
1.805
0150
− Output Voltage − V
VO
TPS76318
OUTPUT VOLTAGE
vs
OUTPUT CURRENT
1.800
VI = 3.5 V
CI = CO = 4.7 µF
TJ = 25°C
Figure 3
IO − Output Current − mA
TPS76350
OUTPUT VOLTAGE
vs
OUTPUT CURRENT
5
4.97
4.95 30 90
4.99
4.98
4.96
60 120 180
5.01
0 150
− Output Voltage − V
VO
VI = 6 V
CI = CO = 4.7 µF
TJ = 25°C
Figure 4
TJ − Junction Temperature − °C
TPS76325
OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
2.49
2.47 −35 5
2.5
2.48
−15 25 125
2.53
−55 45 65
2.51
2.52
85 105
IO = 150 mA
IO = 1 mA
− Output Voltage − V
VO
VI = 3.5 V
CI = CO = 4.7 µF
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TYPICAL CHARACTERISTICS
Figure 5
TJ − Junction Temperature − °C
TPS76318
OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
1.74 −35 5
1.8
1.78
−15 25 125
1.82
−55 45 65 85 105
IO = 150 mA
IO = 1 mA
− Output Voltage − V
VO
1.75
1.79
1.76
1.81
1.77
VI = 3.5 V
CI = CO = 4.7 µF
Figure 6
TJ − Junction Temperature − °C
TPS76350
OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
5.02
4.98
4.94
4.9 −35 5
5.04
5
4.96
4.92
−15 25 125
5.1
−55 45 65
5.06
5.08
85 105
IO = 150 mA
IO = 1 mA
− Output Voltage − V
VO
VI = 6 V
CI = CO = 4.7 µF
Figure 7
TJ − Junction Temperature − °C
100
10 −35 5−15 25 125−55 45 65
1000
85 105
TPS76350
GROUND CURRENT
vs
FREE-AIR TEMPERATURE
Ground Current − Aµ
VI = 6 V
CI = CO = 4.7 µF
IO = 0 mA and 150 mA
Figure 8
f − Frequency − Hz
1k 10k 100k
250
OUTPUT NOISE
vs
FREQUENCY
2mVHz
Ǹ
2
.5mVHz
Ǹ
3mVHz
Ǹ
1mVHz
Ǹ
1
.5mVHz
Ǹ
0mVHz
Ǹ
0
.5mVHz
Ǹ
CO = 4.7 µF
IO = 1 mA
CO = 4.7 µF
IO = 150 mA
CO = 10 µF
IO = 150 mA
CO = 10 µF
IO = 1 mA
TJ = 25°C
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9
TYPICAL CHARACTERISTICS
Figure 9
0.1 0.1 1 1000
10
0.01 10
1
f − Frequency − kHz 100
− Output Impedance −ZoΩ
OUTPUT IMPEDANCE
vs
FREQUENCY
CI = CO = 4.7 µF
ESR = 1 Ω
TJ = 25°C
IO = 150 mA
IO = 1 mA
Figure 10
TJ − Junction Temperature − °C
200
0−35 5
300
100
−15 25 125
600
−55 45 65
400
500
VI = EN = 2.7 V
CI = CO = 4.7 µF
85 105
1 mA
− Dropout Voltage − mV
VDO
150 mA
0 mA
TPS76325
DROPOUT VOLTAGE
vs
FREE-AIR TEMPERATURE
Figure 11
10 M1 M100 k10 k1 k100
Ripple Rejection − dB
f − Frequency − Hz
RIPPLE REJECTION
vs
FREQUENCY
70
60
50
40
30
20
10
0
−10
10
TPS76325
CO = 4.7 µF
ESR = 1 Ω
TJ = 25°C
IO = 150 mA
IO = 1 mA
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10
TYPICAL CHARACTERISTICS
Figure 12
VO− Change in
4
2
3
1
0
−20
20
TPS76318
LINE TRANSIENT RESPONSE
VI
t − Time − µs
0604020 80 100 140120 160 180 200
− Input Voltage − V
∆
Output Voltage − mV
−30
CO = 4.7 µF
ESR = 0.25 Ω
TJ = 25°C
dv
dt +1V
10 ms
5
Figure 13
50
−50
0
−100
100
0
200
t − Time − µs
CO = 4.7 µF
ESR = 0.25 Ω
TJ = 25°C
TPS76318
LOAD TRANSIENT RESPONSE
0604020 80 100 140120 160 180 200
I − Output Current − mA
O
VO− Change in∆
Output Voltage − mV
−150
Figure 14
5
−50
0
−100
7
6
8
TPS76350
LINE TRANSIENT RESPONSE
t − Time − µs
0 15010050 200 250 350300 400 450 500
VO− Change in VI− Input Voltage − V
∆
Output Voltage − mV
50
dv
dt +1V
10 ms
CO = 4.7 µF
ESR = 0.25 Ω
TJ = 25°C
Figure 15
150
−100
100
200
0
100
0
t − Time − µs
CO = 4.7 µF
ESR = 0.25 Ω
TJ = 25°C
TPS76350
LOAD TRANSIENT RESPONSE
0604020 80 100 140120 160 180 200
I − Output Current − mA
O
VO− Change in∆
Output Voltage − mV
−200
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11
TYPICAL CHARACTERISTICS
Figure 16
0.1
0.010 50 100 150 200 250
TYPICAL REGIONS OF STABILITY
COMPENSATION SERIES RESISTANCE (CSR)(1)
vs
OUTPUT CURRENT
10
100
IO − Output Current − mA
CSR − Compensation Series Resistance − Ω
1
Region of Instability
CO = 4.7 µF
TJ = 25°C
Region of Instability
Figure 17
0.1
0.010 0.1 0.2 0.3 0.4 0.5
TYPICAL REGIONS OF STABILITY
COMPENSATION SERIES RESISTANCE (CSR)(1)
vs
ADDED CERAMIC CAPACITANCE
10
100
Added Ceramic Capacitance − µF
0.6 0.7 0.8 0.9 1
1
Region of Instability
Region of Instability
CSR − Compensation Series Resistance − Ω
I = 150 mA
CO = 4.7 µF
TJ = 25°C
Figure 18
0.1
0.010 50 100 150 200 250
TYPICAL REGIONS OF STABILITY
COMPENSATION SERIES RESISTANCE (CSR)(1)
vs
OUTPUT CURRENT
10
100
IO − Output Current − mA
1
Region of Instability
CSR − Compensation Series Resistance − Ω
Region of Instability
CO = 10 µF
Figure 19
0.1
0.010 0.1 0.2 0.3 0.4 0.5
TYPICAL REGIONS OF STABILITY
COMPENSATION SERIES RESISTANCE (CSR)(1)
vs
ADDED CERAMIC CAPACITANCE
10
100
Added Ceramic Capacitance − µF
1
0.6 0.7 0.8 0.9 1
CSR − Compensation Series Resistance − Ω
CO = 10 µF
Region of Instability
Region of Instability
(1) CSR refers to the total series resistance, including the ESR of the capacitor, any series resistance added externally, and PWB trace
resistance to CO.
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APPLICATION INFORMATION
The TPS763xx low-dropout (LDO) regulators are new families of regulators which have been optimized for use in
battery-operated equipment and feature low dropout voltages, low quiescent current (140 µA), and an enable input to
reduce supply currents to less than 2 µA when the regulator is turned off.
device operation
The TPS763xx uses a PMOS pass element to dramatically reduce both dropout voltage and supply current over more
conventional PNP pass element LDO designs. The PMOS pass element is a voltage-controlled device that, unlike a PNP
transistor, does not require increased drive current as output current increases. Supply current in the TPS763xx is
essentially constant from no-load to maximum load.
Current limiting and thermal protection prevent damage by excessive output current and/or power dissipation. The device
switches into a constant-current mode at approximately 1 A; further load reduces the output voltage instead of increasing
the output current. The thermal protection shuts the regulator off if the junction temperature rises above 165°C. Recovery
is automatic when the junction temperature drops approximately 25°C below the high temperature trip point. The PMOS
pass element includes a back diode that safely conducts reverse current when the input voltage level drops below the output
voltage level.
A logic low on the enable input, EN shuts off the output and reduces the supply current to less than 2 µA. EN should be
tied high in applications where the shutdown feature is not used.
A typical application circuit is shown in Figure 20.
C1
1 µF
(1) TPS76316, TPS76318, TPS76325, TPS76327, TPS76328,
TPS7630 TPS76333, TPS76338, TPS76350 (fixed-voltage options).
NC/FB
OUT
1
3
IN
EN
GND
2
4
5
VI
CSR = 1 Ω
VO
4.7 µF
+
TPS763xx(1)
Figure 20. Typical Application Circuit
SGLS247A − JUNE 2004 − REVISED JUNE 2008
www.ti.com
13
APPLICATION INFORMATION
external capacitor requirements
Although not required, a 0.047 µF or larger ceramic bypass input capacitor, connected between IN and GND and located
close to the TPS763xx, is recommended to improve transient response and noise rejection. A higher-value electrolytic input
capacitor may be necessary if large, fast-rise-time load transients are anticipated and the device is located several inches
from the power source.
Like all low dropout regulators, the TPS763xx requires an output capacitor connected between OUT and GND to stabilize
the internal loop control. The minimum recommended capacitance value is 4.7 µF and the ESR (equivalent series
resistance) must be between 0.3 Ω and 10 Ω. Capacitor values of 4.7 µF or larger are acceptable, provided the ESR is less
than 10 Ω. Solid tantalum electrolytic, aluminum electrolytic, and multilayer ceramic capacitors are all suitable, provided
they meet the requirements described above. Most of the commercially available 4.7-µF surface-mount solid tantalum
capacitors, including devices from Sprague, Kemet, and Nichico, meet the ESR requirements stated above.
CAPACITOR SELECTION
PART NO. MFR. VALUE MAX ESR(1) SIZE (H L W)†
T494B475K016AS KEMET 4.7 µF1.5 Ω1.9 × 3.5 × 2.8
195D106x0016x2T SPRAGUE 10 µF1.5 Ω1.3 × 7.0 × 2.7
695D106x003562T SPRAGUE 10 µF1.3 Ω2.5 × 7.6 × 2.5
TPSC475K035R0600 AVX 4.7 µF0.6 Ω2.6 × 6.0 × 3.2
(1) Size is in mm. ESR is maximum resistance in ohms at 100 kHz and TA = 25°C. Listings are sorted by height.
output voltage programming
The output voltage of the TPS76301 adjustable regulator is programmed using an external resistor divider as shown in
Figure 21. The output voltage is calculated using:
VO+0.995 Vref ǒ1)R1
R2Ǔ(
1)
Where:
Vref = 1.192 V typ (the internal reference voltage)
0.995 is a constant used to center the load regulator (1%)
Resistors R1 and R2 should be chosen for approximately 7 -µA divider current. Lower value resistors can be used, but offer
no inherent advantage and waste more power. Higher values should be avoided as leakage currents at FB increase the
output voltage error. The recommended design procedure is to choose R2 = 169 kΩ to set the divider current at 7 µA and
then calculate R1 using:
R1 +ǒVO
0.995 Vref *1Ǔ R2 (2)
SGLS247A − JUNE 2004 − REVISED JUNE 2008
www.ti.com
14
APPLICATION INFORMATION
VO
VI
OUT
FB
R2
GND
EN
IN
≤0.5 V
≥2 V
TPS76301
1 µF
OUTPUT
VOLTAGE
(V) R1 R2
2.5
3.3
3.6
4
5
6.45
187
301
348
402
549
750
169
169
169
169
169
169
OUTPUT VOLTAGE
PROGRAMMING GUIDE
DIVIDER RESISTANCE
(kΩ)(1)
(1) 1% values shown.
3
1
4
2
R1
5
CSR = 1 Ω
4.7 µF
+
Figure 21. TPS76301 Adjustable LDO Regulator Programming
power dissipation and junction temperature
Specified regulator operation is assured to a junction temperature of 125°C; the maximum junction temperature allowable
to avoid damaging the device is 150°C. This restriction limits the power dissipation the regulator can handle in any given
application. To ensure the junction temperature is within acceptable limits, calculate the maximum allowable dissipation,
PD(max) and the actual dissipation, PD, which must be less than or equal to PD(max).
The maximum-power-dissipation limit is determined using the following equation:
PD(max) +TJmax *TA
RqJA
Where:
TJmax is the maximum allowable junction temperature
RθJA is the thermal resistance junction-to-ambient for the package, see the dissipation rating table.
TA is the ambient temperature.
The regulator dissipation is calculated using:
PD+ǒVI*VOǓ IO
Power dissipation resulting from quiescent current is negligible.
regulator protection
The TPS763xx pass element has a built-in back diode that safely conducts reverse currents when the input voltage drops
below the output voltage (e.g., during power down). Current is conducted from the output to the input and is not internally
limited. If extended reverse voltage is anticipated, external limiting might be appropriate.
The TPS763xx also features internal current limiting and thermal protection. During normal operation, the TPS763xx limits
output current to approximately 800 mA. When current limiting engages, the output voltage scales back linearly until the
overcurrent condition ends. While current limiting is designed to prevent gross device failure, care should be taken not to
exceed the power dissipation ratings of the package. If the temperature of the device exceeds 165°C, thermal-protection
circuitry shuts it down. Once the device has cooled down to below 140°C, the regulator operation resumes.
PACKAGE OPTION ADDENDUM
www.ti.com 17-Aug-2012
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
TPS76301QDBVRG4Q1 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS76301QDBVRQ1 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS76316QDBVRG4Q1 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS76316QDBVRQ1 ACTIVE SOT-23 DBV 5 TBD Call TI Call TI
TPS76318QDBVRG4Q1 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS76318QDBVRQ1 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS76325QDBVRG4Q1 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS76325QDBVRQ1 ACTIVE SOT-23 DBV 5 TBD Call TI Call TI
TPS76330QDBVRG4Q1 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS76330QDBVRQ1 ACTIVE SOT-23 DBV 5 TBD Call TI Call TI
TPS76333QDBVRG4Q1 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS76333QDBVRQ1 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS76350QDBVRG4Q1 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
TPS76350QDBVRQ1 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
PACKAGE OPTION ADDENDUM
www.ti.com 17-Aug-2012
Addendum-Page 2
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF TPS76301-Q1, TPS76316-Q1, TPS76318-Q1, TPS76325-Q1, TPS76330-Q1, TPS76333-Q1, TPS76350-Q1 :
•Catalog: TPS76301, TPS76316, TPS76318, TPS76325, TPS76330, TPS76333, TPS76350
NOTE: Qualified Version Definitions:
•Catalog - TI's standard catalog product
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