Advanced Power Electronics Corp. APE8975/A 3A HIGH OUTPUT CURRENT LDO REGULATOR DESCRIPTION FEATURES The APE8975/A is a low noise, high output current, low quiescent current and low dropout linear regulator. The Device includes pass element, error amplifier, band-gap, current-limit and thermal shutdown circuitry. The output current is up to 3A. The characteristics of low dropout voltage and less quiescent current make it good for some critical current application, for example, some battery powered devices. The typical quiescent current is approximately 200 µ A. There are 1.5V, 1.8V, 2.5V, 3.3V fixed output voltage and adjustable output versions (ESOP-8 & TO-263-5L Only). Built-in current-limit, Short current protection and thermal-shutdown functions prevent any fault condition from IC damage. Input Voltage：2.6V to 5.5V Adjustable Output (ESOP-8 & TO-263-5LOnly) and Fixed Output Voltage for 1.5V, 1.8V, 2.5V and 3.3V Dropout Voltage is 380mV at 3A Output Current Guaranteed 3A Output Current Low Quiescent Current is 200µA (typ.) Fast Transient Response Current Limit and Thermal Shutdown Protection Short Circuit Current Fold-back Available in the TO-220, SOT-223, TO-252, TO-263 and TO-263-5L and ESOP-8 Pb-Free packages TYPICAL APPLICATION APE8975/A VOUT VIN VIN GND CIN 10uF EN COUT 10uF FB GND R2 APE8975MP VIN 10uF VOUT R1 ON OFF CIN COUT 10uF APE8975S5 VOUT VIN VIN CIN 10uF VOUT VOUT VIN ON OFF R1 EN NC VOUT GND FB R2 Data and specifications subject to change without notice COUT 10uF VOVT = VFB × (1+R1/R2) VFB = 0.8V R2 Range = 50K ~ 300K 1 201203141 Advanced Power Electronics Corp. APE8975/A ABSOLUTE MAXIMUM RATINGS (at TA=25oC) Input Voltage (VIN) ------------------------------------------- GND - 0.3V to 6V Output Voltage (VUOT) -------------------------------------- GND - 0.3V to VIN + 0.3V EN Pin Voltage (VEN) --------------------------------------- GND - 0.3V to 6V FB Pin Voltage (VFB) ---------------------------------------- GND - 0.3V to 6V Power Dissipation (PD) ------------------------------------- Internally Limited Storage Temperature Range (TST) ---------------------- -40°C To 150°C Operating Temperature Range (TOP) ------------------- -40°C To + 85°C Junction Temperature Range (TJ) ----------------------- -40°C To + 125°C Thermal Resistance from Junction to case (Rthjc) SOT-223 15°C/W ESOP-8 15°C/W TO-263 3.5°C/W TO-252 10°C/W TO-220 3.5°C/W Thermal Resistance from Junction to ambient (Rthja) SOT-223 75°C/W ESOP-8 40°C/W TO-263 25°C/W TO-252 45°C/W TO-220 25°C/W Note: Rthja is measured with the PCB copper area of approximately 1in2 (Multi-layer). That need connect to tap or exposed pad (ESOP-8 only) pin. ORDERING/PACKAGE INFORMATION Fixed Version ADJ Version APE8975X X - XX Pin Define Package Refer Pin Assignment K : SOT-223 H : TO-252 P : TO-220 S : TO-263 APE8975X Output voltage 15 : 1.5V 18 : 1.8V 25 : 2.5V 33 : 3.3V APE8975K APE8975AK Tab is GND Tab is VOUT ( Top View ) ( Top View ) 1 2 3 VIN GND VOUT 2 1 3 Package MP : ESOP-8 S5 : TO-263-5L APE8975P Tab is GND APE8975AP Tab is VOUT (Top View) (Top View) 1 2 3 1 3 2 APE8975S APE8975AS Tab is GND Tab is VOUT TOP VIEW TOP VIEW 1 2 SOT-223 GND VOUT VIN VIN GND VOUT APE8975H Metal Tab GND ( Top View ) TO-263-5L 5 FB 4 VOUT 3 GND 2 VIN 1 EN Tab is GND ( 1 3 3 GND 1 EN 2 VIN 3 NC 4 (GND) 8 GND 7 FB 6 VOUT 5 NC VIN TO-263 ESOP-8 Tab is VOUT Top ) View ( 1 2 GND VIN 2 NC APE8975AH Top ) View 2 VOUT TO-263 TO-220 TO-220 APE8975S5 VIN 1 VOUT GND GND VOUT VIN SOT-223 3 APE8975MP ( Top View ) 3 VOUT VOUT GND TO-252 VIN TO-252 2 Advanced Power Electronics Corp. APE8975/A ELECTRICAL SPECIFICATIONS (VIN = 5V, TA = 25°C (unless otherwise noted)) Parameter Input Voltage SYM VIN TEST CONDITION IOUT=30mA (Note1) Output Voltage Accuracy ∆VOUT IOUT=1mA (Note1) MIN 2.6 TYP - MAX 5.5 UNITS V -2 - 2 % VFB IOUT = 1mA 0.784 0.8 0.816 V IFB VFB=0.8V -100 - 100 nA Quiescent Current IQ IOUT =0mA, VIN=5V - 200 300 μA Shutdown Current ISTB uA Feedback Voltage (ESOP-8 Only) FB Input Leakage Current (ESOP-8 Only) Dropout Voltage VDROP Current Limit (Note 2) ILIMIT For TO-263-5L and ESOP-8 Only IOUT=3A - 2 5 VOUT=1.50V - 1.2 1.5 VOUT=1.80V - 0.9 1.2 VOUT=2.50V - 0.57 0.7 - 0.38 0.6 3.3 4 - VOUT=3.30V Short Circuit Current Load Regulation (Note 3) Enable Input Threshold Enable Pin Current Ripple Rejection Temperature Shutdown Temperature Shutdown Hysterisis Ishort V A Output Voltage < 0.25 x VOUT - 1 - A IOUT =10m~3A - 15 30 mV VENH Regulator Enable 2 - - VENL Regulator Shutdown - - 0.6 IENH VEN=VIN - 0.003 0.1 IENL VEN=0V - 2 4 F=120Hz - 65 - F=1KHz - 55 - - 140 - o C - o C ∆VLOAD PSRR CIN=10uF,CO=10uF, IOUT =10mA TS TSH - 30 V μA dB Note1. Minimum VIN voltage is defined by output adds a dropout voltage. 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. PIN DESCRIPTIONS PIN SYMBOL FB PIN DESCRIPTION Feedback Pin EN Enable Pin Input VIN Input Voltage VOUT Output Voltage GND Ground Pin NC No Connect Pin 3 Advanced Power Electronics Corp. APE8975/A BLOCK DIAGRAM VIN VOUT Current Limit EN - + Error Amp SENSE Enable Bandgap Thermal Shutdown GND Fixed Version VIN VOUT Current Limit EN - + Error Amp FB Enable Bandgap Thermal Shutdown GND Adjustable Version FUNCTION DESCRIPTIONS A minimum of 10µF capacitor must be connected from VOUT to ground to insure stability. Typically a large storage capacitor is connected from VIN to ground to ensure that the input voltage does not sag below the minimum dropout voltage during the load transient response. This pin must always be dropout voltage higher than VOUT in order for the device to regulate properly. Enable Function The APE8975/A (TO263-5L and SOP-8L-EP only) features an LDO regulator enable/disable function. To assure the LDO regulator will switch on; the EN turn on control level must be greater than 2.0 volts. The LDO regulator will go into the shutdown mode when the voltage on the EN pin falls below 0.6 volts. If the enable function is not needed in a specific application, it can be floating. FB Function (ESOP-8 & TO-263-5L only) The output is an adjustable version, the FB voltage is 0.8V. The output voltage can be set by outside resistances. The output voltage, VOUT, is then given by the VOUT = 0.8 x (1 + R1/R2) f ll i ti For the reasons of reducing power dissipation and loop stability, R2 is recommending to choose 50K~300KΩ. 4 Advanced Power Electronics Corp. APE8975/A APPLICATION INFORMATION Like any low-dropout regulator, the APE8975/A 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. Capacitor Selection Normally, use a 10µF capacitor on the input and a 10µF capacitor on the output of the APE8975/A. Larger input capacitor values and lower ESR (X5R, X7R) provide better supply-noise rejection and transient response. A higher- value output capacitor may be necessary if large, fast transients are anticipated and the device is located several inches from the power source. Input-Output (Dropout) Voltage A regulator's minimum input-to-output voltage differential (dropout voltage) determines the lowest usable supply voltage. In battery-powered systems, this determines the useful end-of-life battery voltage. Because the device uses a PMOS, its dropout voltage is a function of drain-to source on-resistance, RDS (ON), multiplied by the load current: VDROPOUT = VIN -VOUT = RDS (ON) x IOUT Current Limit and Short-Circuit Protection The APE8975/A used a current sense-resistor to monitor the output current. A portion of the PMOS output transistor’s current is mirrored to a resistor such that the voltage across this resistor is proportional to the output current. Once the output current exceeds limit threshold, AX6639/A would be protected with a limited output current. Further more, when the output is short to ground, the output current would be folded-back to a less limit. Thermal Considerations The APE8975/A series can deliver a current of up to 3A over the full operating junction temperature range. However, the maximum output current must be dated at higher ambient temperature to ensure the junction temperature does not exceed 125° C. 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 The final operating junction temperature for any set of conditions can be estimated by the following thermal equation : PD (MAX) = (TJ (MAX) - TA) / θJA Where TJ (MAX) is the maximum junction temperature of the die (125oC) and TA is the maximum ambient temperature. The junction to ambient thermal resistance (θ JA) for SOT-223 package at recommended minimum footprint is 75°C/W that is connect 1 in2 PCB copper area to tap pin. 5 Advanced Power Electronics Corp. APE8975/A APPLICATION INFORMATION PCB Layout An input capacitance of ~10µF is required between the APE8975/A input pin and ground (the amount of the capacitance may be increased without limit), this capacitor must be located a distance of not more than 1cm from the input and return to a clean analog ground. Input capacitor can filter out the input voltage spike caused by the surge current due to the inductive effect of the package pin and the printed circuit board ’ s routing wire. Otherwise, the actual voltage at the VIN pin may exceed the absolute maximum rating. The output capacitor also must be located a distance of not more than 1cm from output to a clean analog ground. Because it can filter out the output spike caused by the surge current due to the inductive effect of the package pin and the printed circuit board’s routing wire. 6 Advanced Power Electronics Corp. APE8975/A TYPICAL PERFORMANCE CHARACTERISTICS VIN VS ICCQ 300 ICCQ (uA) 250 200 150 100 50 IOUT=0A 0 2.5 3 3.5 4 4.5 VIN (V) 5 5.5 6 7 Advanced Power Electronics Corp. APE8975/A TYPICAL PERFORMANCE CHARACTERISTICS Load Transient Temperaute VS ICCQ 400 350 ICCQ(uA) 300 250 200 150 100 VIN=5V IOUT=0A 50 0 -40℃ -20℃ 0℃ 25℃ 50℃ 85℃ 105℃ 125℃ Temperature(℃) Power-ON (VIN=5V, VOUT=3.3V, IOUT=2A) 8 Advanced Power Electronics Corp. APE8975/A MARKING INFORMATION ESOP-8 Part Number Package Code 8975MP YWWSSS Date Code (YWWSSS) Y：Last Digit Of The Year WW：Week SSS：Sequence TO-263-5L Part Number Package Code 8975S5 Logo YWWSSS Date Code (YWWSSS) Y：Last Digit Of The Year WW：Week SSS：Sequence SOT-223 Part Number Refer Pin Assignment Package Code 8975XK-&& YWWSSS Output Voltage : 15 : 1.5V ; 18 : 1.8V 25 : 2.5V ; 33 : 3.3V Date Code (YWWSSS) Y：Last Digit Of The Year WW：Week SSS：Sequence 9 Advanced Power Electronics Corp. APE8975/A MARKING INFORMATION TO-252 Part Number Refer Pin Assignment Package Code 8975XH-&& Logo Output Voltage : 15 : 1.5V ; 18 : 1.8V 25 : 2.5V ; 33 : 3.3V YWWSSS Date Code (YWWSSS) Y：Last Digit Of The Year WW：Week SSS：Sequence TO-220 Part Number Refer Pin Assignment Package Code 8975XP-&& Logo Output Voltage : 15 : 1.5V ; 18 : 1.8V 25 : 2.5V ; 33 : 3.3V YWWSSS Date Code (YWWSSS) Y：Last Digit Of The Year WW：Week SSS：Sequence 10