Advanced Power Electronics Corp. APE8845 600mA LOW DROPOUT LINEAR REGULATOR FEATURES DESCRIPTION Application for Extreme Low Output Voltage Guaranteed 600mA Output Current Very Low Quiescent Current at about 30uA ±1% Output Voltage Accuracy Needs Only 1µF Capacitor for Stability Thermal Shutdown / Current Limited Protection Adjusted Mode with 0.8V Reference Voltage Low-ESR Ceramic Capacitor for Output Stability. Tiny ESOP-8 Package Type Halogen Free Product The APE8845 series are low dropout, positive linear regulators with very low quiescent current. The APE8845 can supply 600mA output current with a low dropout voltage & very low output voltage. The APE8845 regulator is able to operate with output capacitors as small as 1 µ F for stability. Other than the current limit protection APE8845 also offers on chip thermal shutdown feature providing protection against overload or any condition when the ambient temperature exceeds the junction temperature. The APE8845 series are available in low-profile, space-saving ESOP-8 packages. High PSRR APPLICATIONS DVD/CD-ROMs, CD/RWs Wireless Devices LCD Modules Battery Power Systems Card Readers XDSL Routers TYPICAL APPLICATION VIN VIN VOUT VOUT C IN R1 GND V SHDN SHDN C OUT ADJ ADJ APE8845-ADJ R2 Figure1. Application of the APE8845-ADJ Note : R1,R2 for adjusted mode only, 1KΩ < R1+R2 < 90KΩ Note : To prevent oscillation, it is recommended to use minimum 1uF X7R or X5R dielectric capacitors if ceramics are used as input / output capacitors. ORDERING / PACKAGE INFORMATION ( Top View ) VOUT 1 APE8845X Package Type MP : ESOP-8 ADJ 2 GND 3 NC 4 GND 8 VIN 7 NC 6 NC 5 SHDN ESOP-8 Rthja=40℃/W Rthjc=15℃/W Data and specifications subject to change without notice 1 20130121V1.1 Advanced Power Electronics Corp. APE8845 ABSOLUTE MAXIMUM RATINGS Input Voltage (VIN) ------------------------------------------ 6V Power Dissipation ------------------------------------------- 0.625W Storage Temperature Range ---------------------------- -65°C To 150°C Maximum Junction Temperature ------------------------ 150°C RECOMMENDED OPERATING CONDITIONS Input Voltage (VIN) ------------------------------------------ 2.8 to 5.5V Operating Junction Temperature Range (TJ) -------- -40 to 125oC Ambient Temperature (TA) -------------------------------- -40 to 85oC ELECTRICAL SPECIFICATIONS ( VIN=VOUT+1V or VIN=2.8V whichever is greater, CIN=1uF, COUT=1uF, TA=25oC, unless otherwise specified) Parameter SYM Output Voltage Accuracy ∆VOUT TEST CONDITION IO=1mA - 1 % 0.808 V 600 650 - mA - 40 55 µA 0.8V ≦ VOUT ≦ 2.0V - 1000 - 2.0V < VOUT ≦ 2.8V - 350 - 2.8V < VOUT ≦ 3.3V - 250 - 0.8V ≦ VOUT ≦ 2.0V - 1600 2000 2.0V < VOUT ≦ 2.8V - 1200 1500 2.8V < VOUT ≦ 3.3V - 800 1000 Current Limit ILIMIT RLoad=1Ω Dropout Voltage (Note 3) VDROP VDROP IO= 0mA IO=300mA IO=600mA UNITS 0.8 VIN=2.6V to 5.5V, IOUT=1mA Dropout Voltage (Note 1) MAX -1 VFB IQ TYP 0.792 FB Voltage Quiescent Current MIN mV mV Line Regulation ∆VLINE IO=1mA, VIN=VOUT +1.5V to 5V - 1 5 mV Load Regulation (Note 2) ∆VLOAD IO=1mA to 600mA - 50 100 mV Ripple Rejection PSRR Io=1mA, COUT=1uF, fRIPPLE = 100Hz - 68 - Io=1mA, COUT=1uF, fRIPPLE = 10KHz - 48 - IOUT = 1mA, VIN = 5V - 50 - TSD - 160 - o Thermal Shutdown Hysteresis ∆TSD - 25 - o Shutdown Pin Current ISHDN - - 5 µA Shutdown Pin Voltage (ON) VSHDN(ON) 1.4 - - V Shutdown Pin Voltage (OFF) VSHDN(OFF) - - 0.4 V Temperature Coefficient Thermal Shutdown Temperature TC dB ppm/ oC C C Note 1：The dropout voltage is defined as V IN-VOUT, which is measured when VOUT drop about 100mV. Note 2：Regulation is measured at a constant junction temperature by using 30ms current pulse and load regulation in the load range from 0mA to 600mA. Note 3：The dropout voltage is defined as V IN-VOUT, which is measured when VOUT drop about 100mV. 2 Advanced Power Electronics Corp. APE8845 PIN DESCRIPTIONS PIN SYMBOL PIN DESCRIPTION VIN Power is supplied to this device from this pin which is required an input filter capacitor. In general, the input capacitor in the range of 1µF to 10µF is sufficient. The output supplies power to loads. The output capacitor is required to prevent output voltage unstable. The VOUT APE8845 is stable with an output capacitor 1µF to 10µF. The larger output capacitor will be required for application with large transit load to limit peak voltage transits, besides could reduce output noise, improve stability, PSRR. GND Common ground pin ADJ For Adjusted mode, Apply R1/R2 resistor divider with VOUT to GND NC SHDN No connected Chip Enable (Active High) 1.6KΩ SHDN BLOCK DIAGRAM Figure 2. Block Diagram of APE8845 VOUT = 0.8 x (1+R1/R2) 3 Advanced Power Electronics Corp. APE8845 APPLICATION INFORMATIO The APE8845 series are low dropout linear regulators that could provide 600mA output current at dropout voltage about 800mV. Besides, current limit and on chip thermal shutdown features provide protection against any combination of overload or ambient temperature that could exceed junction temperature. Output & Input Capacitor The APE8845 regulator is designed to be stable with a wide range of output capacitors. The ESR of the output capacitor affects stability. Larger value of the output capacitor decreases the peak deviations and provides to improve transition response for larger current changes. The capacitor types (aluminum, ceramic, and tantalum) have different characterizations such as temperature and voltage coefficients. All ceramic capacitors are manufactured with a variety of dielectrics, each with different behavior across temperature and applications. Common dielectrics used are X5R, X7R and Y5V. It is recommended to use 1uF to 10uF X5R or X7R dielectric ceramic capacitors with 30 mohm to 50 mohm ESR range between device outputs to ground for transient stability. The APE8845 is designed to be stable with low ESR ceramic capacitors and higher values of capacitors and ESR could improve output stability. So the ESR of output capacitor is very importart because it generates a zero to provide phase lead for loop stability. There are no requirements for the ESR on the input capacitor, but its voltage and temperature coefficient have to be considered for device application environment. Protection Features In order to prevent overloading or thermal condition from damaging the device, APE8845 regulator has internal thermal and current limiting functions designed to protect the device. It will rapidly shut off PMOS pass element during overloading or over temperature condition. Thermal Consideration The power handling capability of the device will be limited by maximum operation junction temperature (125°C). The power dissipated by the device will be estimated by PD = IOUT × (VIN-VOUT). The power dissipation should be lower than the maximum power dissipation listed in “ Absolute Maximum Ratings” section. 4 Advanced Power Electronics Corp. APE8845 TYPICAL PERFORMANCE CHARACTERISTICS I Q vs. T e m p e ra tu re I Q vs. V I N 46.65 4 6 .5 Quiescent Current, I Q(uA) Quiescent Current, I Q(uA) 46 4 5 .5 45 4 4 .5 44 4 3 .5 43 4 2 .5 46.15 45.65 45.15 44.65 42 4 1 .5 44.15 41 -40 -25 0 25 50 75 100 4.3 115 4.5 o T e m p e r atu r e ( C ) 4.7 5 In p u t V o lt a g e , V IN ( V ) L o a d R e g u la tio n V O U T vs. T e m p e ra tu re 3 3 .4 3 .3 5 3 .3 V OUT(V) V OUT(mV) 2 .8 3 .2 5 2 .6 2 .4 3 .2 1m A 2 .2 3 .1 5 3 00 m A 2 3 .1 -40 -20 0 25 50 85 105 125 0 1 10 50 100 200 T e m p e r a t u r e ( oC ) I OU T( m A ) L in e R e g u la tio n Load Transient 300 400 500 600 3 .5 VOUT 3 IOUT V OUT(V) 2 .5 2 1 .5 1 0 .5 0 4 .3 4 .5 4 .7 5 V IN ( V ) o VIN=4V, IOUT=1mA~600mA, TA=25 C 5 Advanced Power Electronics Corp. APE8845 TYPICAL PERFORMANCE CHARACTERISTICS Power On Test Power Off Test VIN VIN VOUT VOUT IOUT IOUT VIN=4V, VOUT=2.5V, IOUT=600mA, Enable Off Test Enable On Test VEN VEN VOUT VOUT IOUT IOUT VIN=3.3V, VOUT=2.5V, IOUT=600mA, PSRR 6 Advanced Power Electronics Corp. APE8845 MARKING INFORMATION ESOP-8 Part Number Package Code 8845MP YWWSSS Date Code (YWWSSS) Y：Last Digit Of The Year WW：Week SSS：Sequence 7