MAX8840ELT25+T - Maxim Integrated Products, Inc.

General Description

The MAX8840/MAX8841/MAX8842 ultra-low-noise, low-

dropout (LDO) linear regulators are designed to deliver

up to 150mA continuous output current. These regula-

tors achieve a low 120mV dropout for 120mA load cur-

rent. The MAX8840 uses an advanced architecture to

achieve ultra-low output voltage noise of 11µVRMS and

PSRR of 54dB at 100kHz.

The MAX8841 does not require a bypass capacitor,

hence achieving the smallest PC board area. The

MAX8842 output voltage can be adjusted with an exter-

nal divider.

The MAX8840/MAX8841 are preset to a variety of volt-

ages in the 1.5V to 4.5V range. Designed with a p-channel

MOSFET series pass transistor, the MAX8840/MAX8841/

MAX8842 maintain very low ground current (40µA).

The regulators are designed and optimized to work with

low-value, low-cost ceramic capacitors. The MAX8840

requires only 1µF (typ) of output capacitance for stability

with any load. When disabled, current consumption drops

to below 1µA.

The MAX8840/MAX8841/MAX8842 are available in a tiny

1.0mm x 1.5mm x 0.8mm µDFN.

Applications

Cellular and Cordless Phones

PDA and Palmtop Computers

Base Stations

Bluetooth Portable Radios and Accessories

Wireless LANs

Digital Cameras

Personal Stereos

Portable and Battery-Powered Equipment

Features

♦Space-Saving 1.0mm x 1.5mm x 0.8mm µDFN

♦11µVRMS Output Noise at 100Hz to 100kHz

Bandwidth (MAX8840)

♦78dB PSRR at 1kHz (MAX8840)

♦120mV Dropout at 120mA Load

♦Stable with 1µF Ceramic Capacitor for Any Load

♦Guaranteed 150mA Output

♦Only Need Input and Output Capacitors (MAX8841)

♦Output Voltages: 1.5V, 1.8V, 2.5V, 2.6V, 2.7V, 2.8V,

2.85V, 3V, 3.3V, 4.5V (MAX8840/MAX8841) and

Adjustable (MAX8842)

♦Low 40µA Ground Current

♦Excellent Load/Line Transient

♦Overcurrent and Thermal Protection

MAX8840/MAX8841/MAX8842

Ultra-Low-Noise, High PSRR, Low-Dropout,

150mA Linear Regulators in µDFN

________________________________________________________________ Maxim Integrated Products 1

µDFN

(1.5mm x 1.0mm)

TOP VIEW

GND

BP (MAX8840)

N.C. (MAX8841)

FB (MAX8842)

SHDN

OUT

5N.C.

MAX8840

MAX8841

MAX8842

Pin Configuration

Ordering Information

MAX8840

OUTPUT PRESET

1.5V TO 4.5V

INPUT

2V TO 6V

OFF SHDN

CBP

10nF

COUT

1µF

CIN

1µF

OUT

GND

Typical Operating Circuits

19-0629; Rev 1; 1/07

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

*xy is the output voltage code (see the Output Voltage Selector

Guide). Other versions between 1.5V and 4.5V are available in

100mV increments. Contact factory for other versions.

+Denotes lead-free package.

PART* TEMP RANGE PIN-PACKAGE

MAX8840ELTxy+T

-40°C to +85°C 6 µDFN-6

1.5mm x 1.0mm

MAX8841ELTxy+T

-40°C to +85°C 6 µDFN-6

1.5mm x 1.0mm

MAX8842ELT+T -40°C to +85°C 6 µDFN-6

1.5mm x 1.0mm

Typical Operating Circuits continued at end of data sheet.

Output Voltage Selector Guide appears at end of data sheet.

MAX8840/MAX8841/MAX8842

Ultra-Low-Noise, High PSRR, Low-Dropout,

150mA Linear Regulators in µDFN

2_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN = VOUT + 0.5V, TA = -40°C to +85°C, unless otherwise noted. CIN = 1µF, COUT = 1µF, CBP = 10nF. Typical values are at +25°C;

the MAX8842 is tested with 2.45V output, unless otherwise noted.) (Note 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 in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

IN to GND .................................................................-0.3V to +7V

Output Short-Circuit Duration ............................................Infinite

OUT, SHDN to GND ......................................-0.3V to (IN + 0.3V)

FB, BP, N.C. to GND..................................-0.3V to (OUT + 0.3V)

Continuous Power Dissipation (TA= +70°C)

6-Pin µDFN (derate 2.1mW/°C above +70°C) .............0.168W

θJA..................................................................................477°C/W

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage Range VIN 26V

IOUT = 1mA, TA = +25°C

-1 +1

IOUT = 100µA to 80mA, TA = +25°C

-2 +2

Output Voltage Accuracy

IOUT = 100µA to 80mA

-3 +3

Maximum Output Current

IOUT

150

Current Limit ILIM OUT = 90% of nominal value

150

200

300

VOUT ≥ 3V, IOUT = 80mA 80

170

VOUT ≥ 3V, IOUT = 120mA 120

2.5V ≤ VOUT < 3V, IOUT = 80mA 90

200

2.5V ≤ VOUT < 3V, IOUT = 120mA 135

2V ≤ VOUT < 2.5V, IOUT = 80mA 120

250

Dropout Voltage (Note 2)

2V ≤ VOUT < 2.5V, IOUT = 120mA 180

IOUT = 0.05mA 40

Ground Current IQVIN = VOUT(nom) - 0.1V, IOUT = 0mA 220

500

µA

Line Regulation VLNR VIN = (VOUT + 0.5V) to 6V, IOUT = 0.1mA

0.001

%/V

Load Regulation VLDR IOUT = 1mA to 80mA

0.003

%/mA

TA = +25°C

0.003

Shutdown Supply Current

ISHDN SHDN = 0V TA = +85°C 0.05 µA

MAX8840 78

f = 1kHz, IOUT = 10mA MAX8841/MAX8842 72

MAX8840 75

f = 10kHz, IOUT = 10mA MAX8841/MAX8842 65

MAX8840 54

Ripple Rejection PSRR

f = 100kHz, IOUT = 10mA

MAX8841/ MAX8842 46

MAX8840/MAX8841/MAX8842

Ultra-Low-Noise, High PSRR, Low-Dropout,

150mA Linear Regulators in µDFN

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VIN = VOUT + 0.5V, TA = -40°C to +85°C, unless otherwise noted. CIN = 1µF, COUT = 1µF, CBP = 10nF. Typical values are at +25°C;

the MAX8842 is tested with 2.45V output, unless otherwise noted.) (Note 1)

Note 1: Limits are 100% tested at +25°C. Limits over operating temperature range are guaranteed by design.

Note 2: Dropout is defined as VIN - VOUT when VOUT is 100mV below the value of VOUT for VIN = VOUT + 0.5V.

Note 3: Time needed for VOUT to reach 90% of final value.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX8840 11

f = 100Hz to 100kHz,

ILOAD = 10mA MAX8841/MAX8842 230

MAX8840 13

Output Noise Voltage

(RMS) f = 100Hz to 100kHz,

ILOAD = 80mA MAX8841/MAX8842 230

µV

Shutdown Exit Delay RLOAD = 50Ω (Note 3)

300

µs

SHDN Logic-Low Level VIN = 2V to 6V

0.4

SHDN Logic-High Level VIN = 2V to 6V

1.5

TA = +25°C

SHDN Input Bias Current VIN = 6V, SHDN = 0V or

6V TA = +85°C 0.01 µA

TA = +25°C

0.006 0.1

FB Input Bias Current

(MAX8842) VIN = 6V, VFB = 1.3V TA = +85°C 0.01 µA

Thermal Shutdown 160 °C

Thermal-Shutdown

Hysteresis 10 °C

Typical Operating Characteristics

(VIN = VOUT + 0.5V, CIN = 1µF, COUT = 1µF, CBP = 10nF, TA= +25°C, unless otherwise noted.)

MAX8840

OUTPUT VOLTAGE vs. INPUT VOLTAGE

MAX8840 toc01

INPUT VOLTAGE (V)

OUTPUT VOLTAGE (V)

54321

0.5

1.0

1.5

2.0

2.5

3.0

3.5

0.0

IOUT = 150mA

IOUT = 0mA

MAX8840

OUTPUT VOLTAGE ACCURACY

vs. LOAD CURRENT

MAX8840 toc02

LOAD CURRENT (mA)

% DEVIATION (%)

125100755025

-0.4

-0.2

0.2

0.4

0.6

-0.6

0150

MAX8840

OUTPUT VOLTAGE ACCURACY

vs. TEMPERATURE

MAX8840 toc03

TEMPERATURE (°C)

% DEVIATION (%)

603510-15

-0.8

-0.6

-0.4

-0.2

0.2

0.4

0.6

0.8

1.0

-1.0

-40 85

IOUT = 1mA

MAX8840/MAX8841/MAX8842

Ultra-Low-Noise, High PSRR, Low-Dropout,

150mA Linear Regulators in µDFN

4_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VIN = VOUT + 0.5V, CIN = 1µF, COUT = 1µF, CBP = 10nF, TA= +25°C, unless otherwise noted.)

MAX8440

DROPOUT VOLTAGE vs. LOAD CURRENT

MAX8840 toc04

INPUT VOLTAGE (V)

DROPOUT VOLTAGE (mV)

125100755025

120

100

160

140

200

180

0150

TA = +85°C

TA = +25°C

TA = -40°C

MAX8840

DROPOUT VOLTAGE vs. OUTPUT VOLTAGE

MAX8840 toc05

OUTPUT (V)

DROPOUT VOLTAGE (mV)

3.02.82.62.42.2

100

150

200

250

2.0 3.2

IOUT = 80mA

MAX8840

GROUND PIN CURRENT vs. INPUT VOLTAGE

MAX8840 toc06

INPUT VOLTAGE (V)

GROUND PIN CURRENT (µA)

4321

150

200

100

250

300

350

ILOAD = 150mA

ILOAD = 0mA

MAX8840

GROUND PIN CURRENT vs. LOAD CURRENT

MAX8840 toc 07

LOAD CURRENT (mA)

GROUND PIN CURRENT (µA)

125100755025

100

150

200

250

300

350

0150

VIN = 3.8V

VIN = 5.5V

MAX8840

GROUND PIN CURRENT vs. TEMPERATURE

MAX8840 toc08

TEMPERATURE (°C)

GROUND PIN CURRENT (µA)

603510-15

-40 85

MAX8840

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

MAX8840 toc09

FREQUENCY (kHz)

PSRR (dB)

1101000.1

0.01 1000

ILOAD = 10mA

CBP = 10nF

MAX8841

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

MAX8840 toc10

FREQUENCY (kHz)

PSRR (dB)

0.1 1 10 100

0.01 1000

ILOAD = 10mA

MAX8840

OUTPUT NOISE

MAX8840 toc11

400µs/div

VIN = 3.8V

ILOAD = 10mA

VNOISE = 11µVRMS

20µV/div

MAX8840

OUTPUT NOISE-SPECTRAL DENSITY

vs. FREQUENCY

MAX8840 toc12

FREQUENCY (kHz)

OUTPUT NOISE DENSITY (nV/√Hz)

0.1 1 10 100

1000

100

10,000

0.01 1000

MAX8840/MAX8841/MAX8842

Ultra-Low-Noise, High PSRR, Low-Dropout,

150mA Linear Regulators in µDFN

_______________________________________________________________________________________ 5

Typical Operating Characteristics (continued)

(VIN = VOUT + 0.5V, CIN = 1µF, COUT = 1µF, CBP = 10nF, TA= +25°C, unless otherwise noted.)

MAX8840

OUTPUT NOISE vs. BP CAPACITANCE

MAX8840 toc13

BP CAPACITANCE (nF)

OUTPUT NOISE (µV)

1100

MAX8840

LOAD-TRANSIENT RESPONSE

MAX8840 toc14

1ms/div

VIN = 3.5V

ILOAD = 0 TO 50mA

VOUT

10mV/div

MAX8840

LOAD-TRANSIENT RESPONSE NEAR DROPOUT

MAX8840 toc15

1ms/div

VIN = 3.1V

ILOAD = 0 TO 50mA

VOUT

10mV/div

MAX8840

LINE-TRANSIENT RESPONSE

MAX8840 toc16

200µs/div

VIN = 3.5V TO 4V

VOUT

2mV/div

MAX8840

EXITING SHUTDOWN WAVEFORM

MAX8840 toc17

20µs/div

VOUT = 2.85V

RLOAD = 47Ω

OUTPUT

VOLTAGE

2V/div

SHUTDOWN

VOLTAGE

MAX8840

ENTERING SHUTDOWN DELAY

MAX8840 toc18

40µs/div

CBP = 0.01µF

OUTPUT

VOLTAGE

2V/div

SHUTDOWN

VOLTAGE

MAX8840

SHUTDOWN EXIT DELAY

MAX8840 toc19

20µs/div

SHUTDOWN

VOLTAGE

VOUT

1V/div

VOUT = 3V

CBP = 100nF

MAX8840

REGION OF STABLE COUT ESR

vs. LOAD CURRENT

MAX8840 toc20

LOAD CURRENT (mA)

COUT ESR (Ω)

100755025

0.1

100

0.01

0150125

MAX8840/MAX8841/MAX8842

Ultra-Low-Noise, High PSRR, Low-Dropout,

150mA Linear Regulators in µDFN

6_______________________________________________________________________________________

Detailed Description

The MAX8840/MAX8841/MAX8842 are ultra-low-noise,

low-dropout, low-quiescent current linear regulators

designed for space-restricted applications. The parts

are available with preset output voltages ranging from

1.5V to 4.5V. These devices can supply loads up to

150mA. As shown in the Functional Diagram, the

MAX8840/MAX8841 consist of an innovative bandgap

core and noise bypass circuit, error amplifier, p-chan-

nel pass transistor, and internal feedback voltage-

divider. The MAX8842 allows for adjustable output with

an external feedback network.

The 1.225V bandgap reference is connected to the

error amplifier’s inverting input. The error amplifier com-

pares this reference with the feedback voltage and

amplifies the difference. If the feedback voltage is

lower than the reference voltage, the pass-transistor

gate is pulled low. This allows more current to pass to

the output and increases the output voltage. If the feed-

back voltage is too high, the pass transistor gate is

pulled high, allowing less current to pass to the output.

The output voltage is fed back through an internal resis-

tor voltage-divider connected to the OUT pin.

An external bypass capacitor connected to BP

(MAX8840) reduces noise at the output. Additional

blocks include a current limiter, thermal sensor, and

shutdown logic.

Internal p-Channel Pass Transistor

The MAX8840/MAX8841/MAX8842 feature a 1Ω(typ)

p-channel MOSFET pass transistor. This provides seve-

ral advantages over similar designs using a pnp pass

transistor, including longer battery life. The p-channel

MOSFET requires no base drive, which considerably

reduces quiescent current. pnp-based regulators waste

considerable current in dropout when the pass transis-

tor saturates. They also use high base-drive current

under heavy loads. The MAX8840/MAX8841/MAX8842

do not suffer from these problems and consume only

40µA of quiescent current in light load and 220µA in

dropout (see the Typical Operating Characteristics).

Output Voltage Selection

The MAX8840/MAX8841 are supplied with factory-set

output voltages from 1.5V to 4.5V, in 100mV increments

(see the Ordering Information). The MAX8842 features

a user-adjustable output through an external feedback

network (see the Typical Operating Circuits).

To set the output of the MAX8842, use the following

equation:

where R2 is chosen to be less than 240kΩand VREF =

1.225V. Use 1% or better resistors.

Shutdown

The MAX8840/MAX8841/MAX8842 feature a low-power

shutdown mode that reduces quiescent current less

than 1µA. Driving SHDN low disables the voltage refer-

ence, error amplifier, gate-drive circuitry, and pass

transistor (see the Functional Diagram), and the device

output enters a high-impedance state. Connect SHDN

to IN for normal operation.

Current Limit

The MAX8840/MAX8841/MAX8842 include a current

limiter, which monitors and controls the pass transis-

tor’s gate voltage, limiting the output current to 200mA.

RRX

OUT

REF

12 1=









Pin Description

MAX8840 MAX8841 MAX8842 NAME FUNCTION

111IN Unregulated Input Supply

222GND Ground

333SHDN Shutdown. Pull low to disable the regulator.

4——BP

Noise Bypass for Low-Noise Operation. Connect a 10nF capacitor

from BP to OUT. It is shorted to OUT in shutdown mode.

—— 4FBAdjustable Output Feedback Point

54, 5 5 N.C. No Connection. Not internally connected.

666OUT

Regulated Output Voltage. Bypass with a capacitor to GND. See the

Capacitor Selection and Regulator Stability section.

MAX8840/MAX8841/MAX8842

Ultra-Low-Noise, High PSRR, Low-Dropout,

150mA Linear Regulators in µDFN

_______________________________________________________________________________________ 7

For design purposes, consider the current limit to be

150mA (min) to 300mA (max). The output can be shorted

to ground for an indefinite amount of time without dam-

aging the part.

Thermal-Overload Protection

Thermal-overload protection limits total power dissipation

in the MAX8840/MAX8841/MAX8842. When the junction

temperature exceeds TJ= +160°C, the thermal sensor

signals the shutdown logic, turning off the pass transistor

and allowing the IC to cool down. The thermal sensor

turns the pass transistor on again after the IC’s junction

temperature drops by 10°C, resulting in a pulsed output

during continuous thermal-overload conditions.

Thermal-overload protection is designed to protect the

MAX8840/MAX8841/MAX8842 in the event of a fault

condition. For continual operation, do not exceed the

absolute maximum junction temperature rating of TJ =

+150°C.

Operating Region and Power Dissipation

The MAX8840/MAX8841/MAX8842 maximum power

dissipation depends on the thermal resistance of the

case and circuit board, the temperature difference

between the die junction and ambient, and the rate of

airflow. The power dissipation across the device is:

P = IOUT (VIN - VOUT)

The maximum power dissipation is:

PMAX = (TJ- TA) / (θJC + θCA)

where TJ- TAis the temperature difference between

the MAX8840/MAX8841/MAX8842 die junction and the

surrounding air, θJC is the thermal resistance of the

package, and θCA is the thermal resistance through the

PC board, copper traces, and other materials to the

surrounding air.

The GND pin of the MAX8840/MAX8841/MAX8842 per-

forms the dual function of providing an electrical con-

nection to ground and channeling heat away. Connect

the GND pin to ground using a large pad or ground

plane.

Noise Reduction

For the MAX8840, an external 0.01µF bypass capacitor

between BP and OUT with an innovative noise bypass

scheme reduces output noises dramatically, exhibiting

11µVRMS of output voltage noise with CBP = 0.01µF

and COUT = 1µF. Startup time is minimized by a power-

on circuit that precharges the bypass capacitor.

Applications Information

Capacitor Selection

and Regulator Stability

Use a 1µF capacitor on the MAX8840/MAX8841/

MAX8842 input and a 1µF capacitor on the output.

Larger input capacitor values and lower ESRs provide

better noise rejection and line-transient response.

Reduce output noise and improve load-transient

response, stability, and power-supply rejection by

using large output capacitors. Note that some ceramic

dielectrics exhibit large capacitance and ESR variation

with temperature. With dielectrics such as Z5U and

Y5V, it may be necessary to use a 2.2µF or larger output

capacitor to ensure stability at temperatures below

-10°C. With X7R or X5R dielectrics, 1µF is sufficient at all

operating temperatures. A graph of the Region of Stable

COUT ESR vs. Load Current is shown in the Typical

Operating Characteristics.

Use a 0.01µF bypass capacitor at BP (MAX8840) for

low-output voltage noise. The leakage current going into

the BP pin should be less than 10nA. Increasing the

capacitance slightly decreases the output noise. Values

above 0.1µF and below 0.001µF are not recommended.

Noise, PSRR, and Transient Response

The MAX8840/MAX8841/MAX8842 are designed to

deliver ultra-low noise and high PSRR, as well as low

dropout and low quiescent currents in battery-powered

systems. The MAX8840 power-supply rejection is 78dB

at 1kHz and 54dB at 100kHz. The MAX8841/MAX8842

PSRR is 72dB at 1kHz and 46dB at 100kHz (see the

Power-Supply Rejection Ratio vs. Frequency graph in

the Typical Operating Characteristics).

When operating from sources other than batteries,

improved supply-noise rejection and transient response

can be achieved by increasing the values of the input

and output bypass capacitors, and through passive fil-

tering techniques. The Typical Operating Characteristics

show the MAX8840/MAX8841/MAX8842 line- and load-

transient responses.

Dropout Voltage

A regulator’s minimum dropout voltage determines the

lowest usable supply voltage. In battery-powered sys-

tems, this determines the useful end-of-life battery volt-

age. Because the MAX8840/MAX8841/MAX8842 use a

p-channel MOSFET pass transistor, their dropout voltage

is a function of drain-to-source on-resistance (RDS(ON))

multiplied by the load current (see the Typical Ope-

rating Characteristics).

MAX8840/MAX8841/MAX8842

Ultra-Low-Noise, High PSRR, Low-Dropout,

150mA Linear Regulators in µDFN

8_______________________________________________________________________________________

OUT

FB***

*MAX8840 ONLY

**MAX8840/MAX8841 ONLY

***MAX8842 ONLY

BP*

MAX8840

MAX8841

MAX8842

ERROR

AMP

SHDN

GND

SHUTDOWN AND

POWER-ON CONTROL

THERMAL

SENSOR

MOS DRIVER

WITH ILIMIT

1.225V REFERENCE

AND NOISE BYPASS

Functional Diagram

MAX8840/MAX8841/MAX8842

Ultra-Low-Noise, High PSRR, Low-Dropout,

150mA Linear Regulators in µDFN

_______________________________________________________________________________________ 9

Revision History

Pages changed at Rev 1: 1

Chip Information

TRANSISTOR COUNT: 284

PROCESS: BiCMOS

MAX8841

OUTPUT PRESET

1.5V TO 4.5V

INPUT

2V TO 6V

OFF SHDN COUT

1µF

CIN

1µF

OUT

GND

Typical Operating

Circuits (continued)

Output Voltage Selector Guide

PART VOUT (V) TOPMARK

MAX8840ELT16+T 1.6 MN

MAX8840ELT18+T 1.8 MO

MAX8840ELT19+T 1.9 LX

MAX8840ELT25+T 2.5 MP

MAX8840ELT26+T 2.6 MK

MAX8840ELT27+T 2.7 LU

MAX8840ELT28+T 2.8 LV

MAX8840ELT29+T 2.85 LW

MAX8840ELT30+T 3 LZ

MAX8840ELT31+T 3.1 ML

MAX8840ELT33+T 3.3 MM

MAX8841ELT15+T 1.5 MQ

MAX8841ELT18+T 1.8 MR

MAX8841ELT25+T 2.5 MS

MAX8841ELT26+T 2.6 MT

MAX8841ELT28+T 2.8 MU

MAX8841ELT29+T 2.85 MV

MAX8841ELT89+T 2.9 MW

MAX8841ELT31+T 3.1 MX

MAX8841ELT33+T 3.3 MY

MAX8841ELT45+T 4.5 MZ

MAX8842ELT+T Adjustable NA

MAX8842

OUTPUT ADJUSTABLE

1.5V TO 4.5V

INPUT

2V TO 6V

OFF SHDN

COUT

1µF

CIN

1µF

OUT

ON FB

GND

(Note: Standard output voltage options, shown in bold, are

available. Contact the factory for other output voltages between

1.5V and 4.5V. Minimum order quantity is 15,000 units.)

MAX8840/MAX8841/MAX8842

Ultra-Low-Noise, High PSRR, Low-Dropout,

150mA Linear Regulators in µDFN

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,

go to www.maxim-ic.com/packages.)

6L UDFN.EPS

-DRAWING NOT TO SCALE-

DOCUMENT CONTROL NO.APPROVAL

TITLE:

REV.

PACKAGE OUTLINE, 6L uDFN, 1.5x1.0x0.8mm

21-0147

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MAX8840

Part Number Table

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Part Number Free

Sample

Buy

Direct Package: TYPE PINS SIZE

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?

Materials Analysis

MAX8840ELTXY+T

Buy

-40°C to +85°C RoHS/Lead-Free: Yes

MAX8840ELT33+

Sample

Buy MicroDFN;6 pin;1.0x1.5mm

Dwg: 21-0147E (PDF)

Use pkgcode/variation: L611+1*

-40°C to +85°C RoHS/Lead-Free: Yes

Materials Analysis

MAX8840ELT30+T

Buy MicroDFN;6 pin;1.0x1.5mm

Dwg: 21-0147E (PDF)

Use pkgcode/variation: L611+1*

-40°C to +85°C RoHS/Lead-Free: Yes

Materials Analysis

MAX8840ELT30+

Sample

Buy MicroDFN;6 pin;1.0x1.5mm

Dwg: 21-0147E (PDF)

Use pkgcode/variation: L611+1*

-40°C to +85°C RoHS/Lead-Free: Yes

Materials Analysis

MAX8840ELT33+T

Buy MicroDFN;6 pin;1.0x1.5mm

Dwg: 21-0147E (PDF)

Use pkgcode/variation: L611+1*

-40°C to +85°C RoHS/Lead-Free: Yes

Materials Analysis

MAX8840ELT28+

Sample

Buy MicroDFN;6 pin;1.0x1.5mm

Dwg: 21-0147E (PDF)

-40°C to +85°C RoHS/Lead-Free: Yes

e 1 of 2MAX8840 - Part Number Table - Maxim/Dallas

31-Jul-2007mhtml:file://C:\TEMP\MAXM\MAX8840ELTXY+T.mht

Didn't Find What You Need?

Use pkgcode/variation: L611+1* Materials Analysis

MAX8840ELT27+

Sample

Buy MicroDFN;6 pin;1.0x1.5mm

Dwg: 21-0147E (PDF)

Use pkgcode/variation: L611+1*

-40°C to +85°C RoHS/Lead-Free: Yes

Materials Analysis

MAX8840ELT28+T

Buy MicroDFN;6 pin;1.0x1.5mm

Dwg: 21-0147E (PDF)

Use pkgcode/variation: L611+1*

-40°C to +85°C RoHS/Lead-Free: Yes

Materials Analysis

MAX8840ELT27+T

Buy MicroDFN;6 pin;1.0x1.5mm

Dwg: 21-0147E (PDF)

Use pkgcode/variation: L611+1*

-40°C to +85°C RoHS/Lead-Free: Yes

Materials Analysis

MAX8840ELT18+

Sample

Buy

-40°C to +85°C RoHS/Lead-Free: Yes

MAX8840ELT18+T

Buy

-40°C to +85°C RoHS/Lead-Free: Yes

e 2 of 2MAX8840 - Part Number Table - Maxim/Dallas

31-Jul-2007mhtml:file://C:\TEMP\MAXM\MAX8840ELTXY+T.mht

MAX8841

Part Number Table

ENGLISH • 简体中文 • 日本語 • 한국어

WHAT'S NEW PRODUCTS SOLUTIONS DESIGN APPNOTES SUPPORT BUY COMPANY MEMBERS

Didn't Find What You Need?

Notes:

1. See the MAX8841 QuickView Data Sheet for further information on this product family or download the

MAX8841 full data sheet (PDF, 580kB).

2. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.

3. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within

one business day.

4. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: See full

data sheet or Part Naming Conventions.

5. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product

uses.

Part Number Free

Sample

Buy

Direct Package: TYPE PINS SIZE

DRAWING CODE/VAR *

Temp RoHS/Lead-Free?

Materials Analysis

MAX8841ELTXY+T

Buy

-40°C to +85°C RoHS/Lead-Free: Yes

MAX8841ELT18+T

Buy MicroDFN;6 pin;1.0x1.5mm

Dwg: 21-0147E (PDF)

Use pkgcode/variation: L611+1*

-40°C to +85°C RoHS/Lead-Free: Yes

Materials Analysis

MAX8841ELT18+

Sample

Buy MicroDFN;6 pin;1.0x1.5mm

Dwg: 21-0147E (PDF)

Use pkgcode/variation: L611+1*

-40°C to +85°C RoHS/Lead-Free: Yes

Materials Analysis

e 1 of 2MAX8841 - Part Number Table - Maxim/Dallas

31-Jul-2007mhtml:file://C:\TEMP\MAXM\MAX8841ELTXY+T.mht

e 2 of 2MAX8841 - Part Number Table - Maxim/Dallas

31-Jul-2007mhtml:file://C:\TEMP\MAXM\MAX8841ELTXY+T.mht