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| Advanced Power Electronics Corp. APE8800A 300mA Low Dropout Linear Regulator with Shutdown Description The APE8800A is a low dropout, positive linear regu lator with very low quiescent current. The APE8800A can supply 300mA output current with low dropout voltage at about 250mV. The BP pin with a 10nF bypass capacitor can help reduce the output noise level. The shutdown function can provide remote control for the external signal to decide the on/off state of APE8800A. With a logic high level at SHDN pin, the device is in the on state, and vice versa. The APE8800A regulator is able to operate with output capacitors as small as 1F for stability. Other than the current limit protection, APE8800A also offers the on chip thermal shutdown feature providing protection against overload or any condition when the ambient temperature exceeds the maximum junction temperature. The APE8800A offers high precision output voltage of 2%. It is available in fixed output voltages including 1.5V, 1.8V, 2.5V, 2.8V, 3.0V, and 3.3V. The APE8800A is housed in low-profile, space-saving 5-lead SOT-23-5 package. Features Low Dropout Voltage of 250mV at 300mA Guaranteed 300mA Output Current Very Low Quiescent Current at 30A Max. 2% Output Voltage Accuracy Needs Only 1F Capacitor for Stability Thermal Shutdown Protection Current Limit Protection Active Low Shutdown Control Low-ESR Ceramic Capacitor for Output Stability Tiny package: SOT-23-5 RoHS Compliant Applications DSC Wireless Devices LCD Modules Battery Power Systems Card Readers PDA Pin Assignments SOT-23-5 Package TOP VIEW 1. VIN 2. GND 3. SH DN 4. BP 5. VOUT Ordering Information APE8800A- 5 1 2 4 3 P: Pb Free with Commercial Standard (RoHS Compliant) Package Type Y5: SOT-23-5 Output Voltage 15: 1.5V 28: 2.8V 18: 1.8V 30: 3.0V 25: 2.5V 33: 3.3V Figure 1. Pin Assignment of APE8800A SOT-23-5 Marking Part Number APE8800A-15Y5P APE8800A-18Y5P APE8800A-25Y5P Product Part Number Code Fc APE8800A-28Y5P Fb Fd APE8800A-30Y5P APE8800A-33Y5P Product Code Fe Ff Fh Data and specifications subject to change without notice. 200214077-1/7 Advanced Power Electronics Corp. Typical Application Circuit VIN CIN 1F VIN VOUT APE8800A VOUT COUT 1F APE8800A GND VSHDN SHDN BP CBP 10nF Figure 2. Typical Application Circuit of APE8800A Note To prevent oscillation, it is recommended to use minimum 1F X7R or X5R dielectric capacitors if ceramics are used as input/output capacitors. Functional Pin Description Pin Name VIN Pin Function 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 1F to 10F is sufficient. The output supplies power to loads. The output capacitor is required to prevent output voltage from oscillation. The APE8800A is stable with an output capacitor 1F or greater. The larger output capacitor will be required for application with larger load transients. The large output capacitor could reduce output noise, improve stability, and PSRR. Common ground pin Reference Noise Bypass ( the Bypass Capacitor >= 1nF ) VOUT GND BP SHDN Chip Enable (Active High) Block Diagram VIN RSEN PMOS VOUT Current Limit SHDN Power Shutdown Error Amp R1 Thermal Shutdown BP Vref 1.2V R2 GND Figure 3. Block Diagram of APE8800A 2/7 Advanced Power Electronics Corp. Absolute Maximum Ratings APE8800A Supply Input Voltage (VIN)----------------------------------------------------------------------------------- + 6V Maximum Junction Temperature (TJ)-------------------------------------------------------------------- + 150 Power Dissipation SOT-23 (PD)--------------------------------------------------------------------------- + 0.4W Package Thermal Resistance SOT-23 (JA)------------------------------------------------------------ + 250/W Storage Temperature Range (TS)------------------------------------------------------------------------- - 65 to + 150 Lead Temperature (Soldering, 10 sec.) (TLEAD)-------------------------------------------------------- + 260 Note Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. Recommended Operating Conditions Input Voltage (VIN)-------------------------------------------------------------------------------------------- + 2.8 to + 5.5V Operating Junction Temperature Range (TJ)---------------------------------------------------------- - 40 to + 125 Ambient Temperature (TA)---------------------------------------------------------------------------------- -40 to 85oC Electrical Characteristics (VIN=VOUT+1V or VIN=2.8V whichever is greater, SHDN pin connected to VIN , CIN=1F, COUT=1F, TA=25 C, unless otherwise specified) Parameter Current Limit Quiescent Current Standby Current Output Voltage Accuracy Dropout Voltage (Note 1) Line Regulation Load Regulation (Note 2) Ripple Rejection Output Noise Temperature Coefficient Thermal Shutdown Temperature Thermal Shutdown Hysteresis Shutdown Pin Current Noise Bypass Terminal Voltage Shutdown Pin Voltage (ON) Shutdown Pin Voltage (OFF) Symbol ILIMIT IQ ISTBY VOUT VDROP VLINE VLOAD PSRR n TC TSD TSD I SHDN VREF V SHDN(ON) V SHDN(OFF) Conditions RLoad=1 IO= 0mA VIN=2.8~5V, Output Off IO= 1mA 1.5V VOUT 2.0V IO=300mA 2.0V < VOUT 2.8V 2.8V < VOUT 4.5V IO=1mA, VIN=VOUT +1V to 5V IO=0mA to 300mA VIN=VOUT+1V fRIPPLE = 120Hz, COUT = 1F CBP=10nF, f=1KHz, VIN=5V IOUT = 1mA, VIN = 5V Min 300 Typ Max Unit mA 30 50 0.1 A A % mV -2 1100 350 250 1 6 60 0.4 50 160 25 +2 5 20 mV mV dB V Hz ppm/ C C C 0.1 A V V 1.23 1.4 0.4 CBP=0.1uF, COUT=1uF, IOUT=30mA 300 V s Shutdown Exit Delay Time T Note 1 The dropout voltage is defined as VIN-VOUT, which is measured when VOUT drops about 100mV. Note 2 Regulation is measured at a constant junction temperature by using 40ms current pulse and load regulation in the load range from 0mA to 300mA. 3/7 Advanced Power Electronics Corp. Application Information The APE8800A is a low dropout linear regulator that could provide 300mA output current at dropout voltage about 250mV. Current limit and on chip thermal shutdown features provide protection against any combination of overload or ambient temperature that could exceed maximum junction temperature. 1. Output and Input Capacitor The APE8800A 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 improves transient 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 30m to 50m ESR range between device outputs and ground for stability. The APE8800A is designed to be stable with low ESR ceramic capacitors and higher values of capacitors and ESR could improve output stability. The ESR of output capacitor is very important because it generates a zero to provide phase lead for loop stability. APE8800A 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. 2. Protection Features In order to prevent overloading or thermal condition from damaging the device, APE8800A 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. 3. Thermal Consideration The power handling capability of the device will be limited by maximum operation junction temperature. The power dissipated by the device will be estimated by PD = IOUT x (VIN-VOUT). The power dissipation should be lower than the maximum power dissipation listed in "Absolute Maximum Ratings" section. 4. Shutdown Operation The APE8800A is shutdown by pulling the SHDN input low, and turned on by driving the SHDN high. If this function is not used, the SHDN input should be tied to VIN to keep the regulator on at all times (the SHDN must not be left floating). 4/7 Advanced Power Electronics Corp. Typical Performance Curves 50 850 APE8800A Quiescent Current(uA) 45 40 Current Limit(mA) 800 750 35 700 30 3.0 3.5 4.0 4.5 5.0 5.5 6.0 650 3.5 4.0 4.5 5.0 5.5 6.0 Input Voltage(v) Input Voltage(v) Figure 4. Quiescent Current vs. Input Voltage 850 60 Figure 5. Current limit vs. Input Voltage Quiescent Current(uA) Current Limit (mA) 800 50 750 40 700 30 650 -40 -20 0 20 40 60 o 20 80 100 120 -40 -20 0 20 40 60 o 80 100 120 Temperature( C) Temperaure( C) Figure 6. Current limit vs. Temperature 500 1.000 Figure 7. Quiescent Current vs. Temperature Normalized Output Voltage 0.999 0.998 0.997 0.996 0.995 0.994 0.993 0.992 0.991 0.990 -25 0 25 50 o Dropout Voltage(mV) 400 -40 C o 25 C o 85 C o 125 C o 300 200 100 75 100 125 0 0 50 100 150 200 250 300 Temperature( C) Output Current (mA) Figure 8. Output Voltage vs. Temperature Figure 9. Dropout Voltage vs. Temperature 5/7 Advanced Power Electronics Corp. Typical Performance Curves (Continued) VIN=5V IOUT=150mA CIN=1uF COUT=1uF APE8800A VOUT VOUT SHDN IOUT Figure 10. Shutdown Function VIN=4~5V IOUT=10mA CIN=1uF COUT=1uF Figure 11. Load Transient Response VIN=5V IOUT=1mA CIN=1uF COUT=1uF VOUT VIN VOUT SHDN Figure 12. Line Transient Response Figure 13. Shutdown Exit Delay Time 6/7 Advanced Power Electronics Corp. Outline Information SOT-23-5 Package (Unit: mm) SYMBOLS UNIT A A1 A2 b C D E e H L 1 e1 Note 1 Note 2 Note 3 Note 4 APE8800A DIMENSION IN MILLIMETER MIN NOM MAX 1.00 1.10 1.30 0.00 0.70 0.35 0.10 2.70 1.50 --2.60 0.37 1 ----0.80 0.40 0.15 2.90 1.60 1.90(TYP) 2.80 --5 0.95(TYP) 0.10 0.90 0.50 0.25 3.10 1.80 --3.00 --9 --- Package Body Sizes Exclude Mold Flash Protrusions or Gate Burrs. Tolerance 0.1000 mm(4mil) Unless Otherwise Specified. Coplanarity 0.1000 mm Dimension L Is Measured in Gage plane. 7/7 |
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