Advanced Power Electronics Corp. APE8839A DUAL 600mA LDO REGULATOR WITH ENABLE FUNCTION FEATURES DESCRIPTION Input Voltage Range : Channel 1 : 3.4V to 5.5V Channel 2 : 2.8V to 5.5V Low Quiescent Current is 50uA/per channel (typ.) Tight Load and Line Regulation Fast Transient Response Current Limit and Thermal Shutdown Protection Only low-ESR Ceramic Capacitors Required for Stability The APE8839A is an efficient, precise dual-channel CMOS LDO regulator optimized for ultra-low-quiescent applications. Regulators output1 and output2 are capable of sourcing 600mA of output current. The regulators are stable with output capacitors as low as 1F, including current limit, thermal shutdown protection, fast transient response, low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. The APE8839A contains internal pull high enable function that allows the output of each regulator to be turned off independently. The APE8839A regulators are available in used SO-8 with Exposed Pad package. Available in the ESOP-8 Pb-Free Package TYPICAL APPLICATION APE8839A 2 VIN1 C1 ON 1uF VIN1 8 OFF VOUT1 VIN2 EN1 EN2 1 VOUT1 C2 1uF VOUT2 4 C3 ON 5 OFF 3 VIN2 1uF VOUT2 C4 1uF GND 6,7 PACKAGE ORDERING INFORMATION ( Top View ) APE8839AX - X VOUT1 Package MP : ESOP-8 Output voltage A : VOUT1=3.3V, VOUT2=1.8V B : VOUT1=3.3V, VOUT2=1.5V C : VOUT1=3.3V, VOUT2=1.2V Data and specifications subject to change without notice 8 EN1 1 VIN1 2 VOUT2 3 VIN2 4 7 GND GND 6 GND 5 EN2 ESOP-8 1 201012073LG Advanced Power Electronics Corp. APE8839A ABSOLUTE MAXIMUM RATINGS VIN1, VIN2 Pin Voltage (VIN1,2) ----------------------------- 6V Output Voltage (VOUT1/VOUT2) ----------------------------- GND - 0.3 to VIN + 0.3V Enable Voltage (VEN1/VEN2) ------------------------------- GND - 0.3 to VIN + 0.3V Power Dissipation (PD) ------------------------------------ Internally Limited Storage Temperature Range (TST) ---------------------- -65C To 150C Operating Junction Temperature Range (TOPJ) ------ -40C To + 125C Junction Temperature (TJ) -------------------------------- -40C To + 150C Thermal Resistance from Junction to case (Rthjc) 15C/W Note 45C/W Thermal Resistance from Junction to ambient (R thja) Note: Rthja is measured with the PCB copper area of approximately 1 in2(Multi-layer). That need connect to exposed pad. ELECTRICAL SPECIFICATIONS ( VIN1 = VIN2 = 5V, TA=25oC (unless otherwise noted)) Parameter Input Voltage (Note1) Enable Input Threshold EN Pull-high Resistance Shutdown Current SYM TYP MAX IOUT1=30mA 3.4 - 5.5 VIN2 IOUT2=30mA 2.8 - 5.5 2.0 - - - - 0.8 1.25 2.6 5 M - 4 8 uA - 150 - C - 40 - C 3.234 3.3 3.366 V VEN1/2H VEN1/2L REN1/2 Temperature Shutdown ISD TSD1,2 Temperature Shutdown Hysterisis TSDR1,2 TEST CONDITION UNITS MIN VIN1 Each channel VIN1 = VIN2 = 5V IOUT1,2 =0mA, VIN=5V, VEN1,2=0V V V Regulator1 Output Voltage Accuracy VOUT1 Output Voltage Temperature stability Dropout Voltage Quiescent Current VDROP1 Line Regulation IQ1 VLine1 Load Regulation VLOAD IOUT1=30mA IOUT1=10mA (Note4) - 1 - % IOUT1=600mA, VOUT1=VOUT1-2% - 300 500 mV IOUT1 =0mA, VIN1=5V VIN1 = 4V to 5.5V, IOUT1 = 30mA - 50 80 uA - 0.1 0.2 %/V IOUT1 =1m~600mA - 10 40 mV Current Limit ILIMIT1 VIN1 = 5.0V 700 - - mA Short Circuit Current IShort1 VOUT1<0.25 x VOUT1 - 500 - mA IOUT1 =30mA, F=100Hz - -60 - dB IOUT2=30mA (APE8839AMP-A) 1.764 1.8 1.836 IOUT2=30mA (APE8839AMP-B) 1.470 1.5 1.530 IOUT2=30mA (APE8839AMP-C) 1.176 1.2 1.224 Ripple Rejection PSRR1 Regulator2 Output Voltage Accuracy VOUT2 IOUT2=10mA Output Voltage Temperature stability Dropout Voltage Quiescent Current Line Regulation Load Regulation (Note3) VDROP2 IQ2 VLine2 VLOAD IOUT2=600mA, VOUT2=VOUT2-2% - 1 - VOUT=1.2V - 1300 1600 VOUT=1.5V - 1000 1300 VOUT=1.8V - 700 1000 V % mV IOUT2 =0mA, VIN2=5V VIN2 = 2.8V to 5.5V, IOUT2 = 30mA - 50 80 uA - 0.1 0.2 %/V IOUT2 =1m~600mA - 10 30 mV 700 - - mA Current Limit (Note2) ILIMIT2 VIN2 = 5.0V Short Circuit Current IShort2 VOUT2<0.25 x VOUT2 - 500 - mA IOUT2 =30mA, F=100Hz - -60 - dB Ripple Rejection PSRR2 Note1: The device is not guaranteed to function outside its operating conditions. Note2: Current limit is measured at constant junction temperature by using pulsed testing with a low ON time. Note3: Regulation is measured at constant junction temperature by using pulsed testing with a low ON time. Note4: Guaranteed by design. 2 Advanced Power Electronics Corp. APE8839A PIN DESCRIPTIONS PIN SYMBOL GND PIN DESCRIPTION Common Ground EN1 Channel 1 Shutdown Control Pin, the pin is internal pull high. EN2 Channel 2 Shutdown Control Pin, the pin is internal pull high. VOUT1 Channel1 Output Voltage VOUT2 Channel2 Output Voltage VIN1 Channel1 input Voltage VIN2 Channel2 input Voltage BLOCK DIAGRAM VIN1 VIN2 Bandgap + VOUT2 Thermal Shutdown Error Amp Current Limit1 - + - Current Limit2 Error Amp Enable2 VOUT1 Enable1 GND EN2 EN1 FUNCTION DESCRIPTIONS The APE8839A is a highly accurate, dual, low noise, CMOS LDO voltage regulators with enable function. The output voltage for each regulator is set independently by fuse trimming. As illustrated in function block diagram, it consists of a reference, error amplifier, a P-channel pass transistor, an ON/OFF control logic and an internal feedback voltage divider. The band gap reference is connected to the error amplifier, which compares the reference with the feedback voltage and amplifies the voltage difference. If the feedback voltage is lower than the reference voltage, the pass- transistor gate is pulled lower, which allows more current to pass to the VOUT pin and increases the output voltage. If the feedback voltage is too high, the pass transistor gate is pulled up to decrease the output voltage. The output voltage is feed back through an internal resistive divider connected to VOUT pin. Additional blocks include an output current limiter, thermal sensor, and shutdown logic. Enable Function EN1 and EN2 pin start and stop the corresponding outputs independently. Those pins are internal pull high. When the EN pin is switched to the power off level, the operation of all internal circuit stops, the build-in P-channel MOSFET output transistor between pins VIN and VOUT is switched off, allowing current consumption to be drastically reduced. For senstitive applications, due to the high internal pull-high resistance value, we recommend add the external pull-high resistor to reduce any external influence, such as the side effect brought by high humidity environment. 3 Advanced Power Electronics Corp. APE8839A Dropout Voltage A regulator's minimum input-output voltage differential, or dropout voltage, determines the lowest usable supply voltage. The APE8839A use a P- channel MOSFET pass transistor, its dropout voltage is function of drain-to-source onresistance RDS (ON) multiplied by the load current. V DROPOUT = VIN-VOUT = RDS(ON) x IOUT Current Limit Each channel of APE8839A includes a fold back current limiter. It monitors and controls the pass transistor's gate voltage, estimates the output current, and limits the output current minimum 700mA. Thermal Shutdown Protection Thermal Shutdown protection limits total power dissipation of APE8839A. When the junction temperature exceeds T J = +150C, a thermal sensor turns off the pass transistor, allowing the IC to cool down. The thermal sensor turns the pass transistor on again after the junction temperature cools down by 25C, resulting in a pulsed output during continuous thermal shutdown conditions. Thermal shutdown protection is designed to protect the APE8839A in the event of fault conditions. For continuous operation, the absolute maximum operating junction temperature rating of TJ = +125C should not be exceeded. Application Information Like any low-dropout regulator, the APE8839A requires input and output decoupling capacitors. The device is specifically designed for portable applications requiring minimum board space and smallest components. These capacitors must be correctly selected for good performance (see Capacitor Characteristics Section). Please note that linear regulators with a low dropout voltage have high internal loop gains which require care in guarding against oscillation caused by insufficient decoupling capacitance. Input Capacitor An input capacitance of 1F is required between input pin and ground directly (the amount of the capacitance may be increased without limit). The input capacitor must be located less than 1cm from the device to assure input stability. A lower ESR capacitor allows the use of less capacitance, while higher ESR type (like aluminum electrolytic) requires more capacitance. Capacitor types (aluminum, ceramic and tantalum) can be mixed in parallel, but the total equivalent input capacitance/ ESR must be defined as above to stable operation. There are no requirements for the ESR on the input capacitor, but tolerance and temperature coefficient must be considered when selecting the capacitor to ensure the capacitance will be 1F over the entire operating temperature range. 4 Advanced Power Electronics Corp. APE8839A Output Capacitor The APE8839A is designed specifically to work with very small ceramic output capacitors. A ceramic capacitor (temperature characteristics X7R, X5R) in 1F is suitable for the APE8839A application. The recommended minimum capacitance for the device is 1F, X5R or X7R dielectric ceramic, between VOUT and GND for stability, but it may be increased without limit. Higher capacitance values help to improve transient. The output capacitor's ESR is critical because it forms a zero to provide phase lead which is required for loop stability. Thermal Considerations The APE8839A series can deliver a current of up to 600mA/channel over the full operating junction temperature range. However, the maximum output current must be debated at higher ambient temperature to ensure the junction temperature does not exceed 125C. With all possible conditions, the junction temperature must be within the range specified under operating conditions. Power dissipation can be calculated based on the output current and the voltage drop across regulator. PD = (VIN - VOUT) IOUT + VIN x IQ The final operating junction temperature for any set of conditions can be estimated by the following thermal equation: PD (MAX) = (TJ (MAX) - TA) / RthJA Where TJ (MAX) is the maximum junction temperature of the die (125 C) and T A is the maximum ambient temperature. The junction to ambient thermal resistance (Rth JA) ESOP-8 package at recommended minimum footprint is 45C/W that is connect 1 in 2 PCB copper area to exposed pad. 5 Advanced Power Electronics Corp. APE8839A TYPICAL PERFORMANCE CHARACTERISTICS Dropout Voltage VIN VS Quiescent Current 60 1000 40 Dropout Voltage (mV) Quiescent Current (uA) Channel 1 50 Channel 2 30 20 APE8839AMP-A No Load 10 800 Channel 2 600 400 Channel 1 200 APE8839AMP-A 0 0 3 3.5 4 4.5 5 0 5.5 0.1 0.2 0.4 0.5 0.6 VIN VS VOUT2 (Channel 2) 3.40 1.90 3.38 1.88 3.36 3.34 1.86 1.84 VOUT2 (V) VOUT1 (V) VIN VS VOUT1 (Channel 1) 3.32 3.30 3.28 3.26 1.82 1.80 1.78 1.76 3.24 3.22 1.74 1.72 APE8839AMP-A IOUT1=30mA 3.20 APE8839AMP-A IOUT1=30mA 1.70 3.5 4 4.5 5 3 5.5 3.5 4 VIN1 (V) 4.5 5 5.5 VIN2 (V) IOUT VS VOUT1 (Channel 1) IOUT VS VOUT2 (Channel 2) 1.90 3.40 3.38 3.36 1.88 3.34 3.32 VOUT2 (V) VOUT1 (V) 0.3 IOUT1/2 (A) VIN1/2 (V) 3.30 3.28 3.26 3.24 3.22 3.20 APE8839AMP-A VIN1=5V 0 0.1 0.2 0.3 IOUT1 (A) 0.4 0.5 1.86 1.84 1.82 1.80 1.78 1.76 1.74 APE8839AMP-A VIN2=5V 1.72 1.70 0.6 0 0.1 0.2 0.3 0.4 0.5 0.6 IOUT2 (A) 6 Advanced Power Electronics Corp. APE8839A TYPICAL PERFORMANCE CHARACTERISTICS Temperature VS VOUT2 (Channel2) 2.00 3.45 1.95 3.40 1.90 VOUT2 (V) VOUT1 (V) Temperature VS VOUT1 (Channel1) 3.50 3.35 3.30 3.25 3.20 3.15 3.10 1.80 1.75 1.70 APE8839AMP-A VIN1=5V IOUT1=10mA -40 -20 0 1.85 APE8839AMP-A VIN1=5V IOUT2=10mA 1.65 1.60 25 50 85 105 125 -40 -20 0 25 50 85 105 125 Temperature Temperature Temperature VS Dropout Voltage Dropout Voltage (mV) 1000 Channel2 800 600 400 Channel1 APE8839AMP-A IOUT1=600mA IOUT2=600mA 200 0 -40 -20 0 25 50 85 105 125 Temperature 7 Advanced Power Electronics Corp. APE8839A TYPICAL PERFORMANCE CHARACTERISTICS Power ON Test (Channel1) Power ON Test (Channel2) Enable -ON Test (Channel 1) Enable -ON Test (Channel 2) Load Transient (Channel 1) Load Transient (Channel 2) 8 Advanced Power Electronics Corp. APE8839A MARKING INFORMATION ESOP-8 8839AMP-& Part Number Package Code Output Voltage YWWSSS Date Code (YWWSSS) YLast Digit Of The Year WWWeek SSSSequence 9