AP3581A,B,C BCDSEMI | Alldatasheet

Document overview

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Technical content

Features

  • Supply V oltage: 5V/12V
  • V IN Input Range: 3.0V to 13.2V
  • 0.6V/0.8V to 80% of V IN Output Range
  • Internal Reference: 0.6V/0.8V
  • Simple Single-loop Control
  • V oltage-mode PWM Control
  • Duty Cycle: 0% to 80%
  • Fast Transient Response
  • 10MHz High-bandwidth Error Amplifier with 6V/µs Slew Rate
  • Fixed Oscillator Frequency: 300kHz/200kHz
  • Lossless, Programmabl e Over Current Protection (Uses Lower MOSFET RDS(ON) )
  • Start-up into Pre-biased Output
  • Built-in Thermal Shutdown
  • Built-in Soft-start
  • Over Current/V oltage Protection
  • Under V oltage Protection
  • Integrated Boot Diode

Applications

  • Power Supplies for Microprocessors/Peripherals
  • PCs, Embedded Controllers, Memory Supplies
  • DSP and Core Communications Processor Supplies
  • Subsystem Power Supplies
  • PCI, AGP, Graphics Cards, Digital TV
  • SSTL-2 and DDR/2/3 SDRAM Bus Termination Supply
  • Cable Modems, Set Top Boxes, and DSL Modems
  • Industrial Power Supplies and General Purpose Supplies
  • 5V/12V Input DC-DC Regulators
  • Low-voltage Distributed Power Supplies

Figure 1. Package Type of AP3581A/B/C

Figure 2. Pin Configuration of AP3581A/B/C (Top View)

1 BOOT

2 UGATE

4 LGATE

5 VCC

7 COMP/EN Compensation and disable pin, this pin is the output of the error

8 PHASE

9 GND

Single Phase Synchronous Buck PWM Controller AP3581A/B/C Oct. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited Functional Block Diagram Figure 3. Functional Block Diagram of AP3581A/B/C

Ordering Information

Range Part Number Marking ID Packing Type AP3581AMP-G1 3581AMP-G1 Tube AP3581AMPTR-G1 3581AMP-G1 Tape & Reel AP3581BMP-G1 3581BMP-G1 Tube AP3581BMPTR-G1 3581BMP-G1 Tape & Reel AP3581CMP-G1 3581CMP-G1 Tube PSOP-8 -40 to 85°C AP3581CMPTR-G1 3581CMP-G1 Tape & Reel BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green. G1: Green Blank: Tube TR: Tape & Reel Circuit Type A:AP3581A B:AP3581B C:AP3581C Package MP: PSOP-8

Single Phase Synchronous Buck PWM Controller AP3581A/B/C Oct. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit Supply V oltage V CC -0.3 to 15 V BOOT V oltage V BOOT -0.3 to V PHASE +15 V V oltage from UGATE to PHASE VUGATE -0.3 to 15 V V oltage from PHASE, LGATE Pin to GND VPHASE, VLGATE -1 to 15 V V oltage on Other Separate Pin -0.3 to 6 V Thermal Resistance θJA 50 ºC/W Operating Junction Temperature TJ -40 to 125 ºC Storage Temperature TSTG -65 to 150 ºC Lead Temperature (Soldering, 10 sec) TLEAD 260 ºC ESD (Human Body Model) (Note 2) 2000 V ESD (Machine Model) (Note 2) 200 V Note 1: Stresses greater than 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 under “Recommended Operating Co nditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Note 2: Devices are ESD sensitive. Handling precaution recommended. Recommended Operating Conditions Parameter Symbol Min Max Unit Supply Input V oltage V CC 4.5 13.2 V Operating Junction Temperature Range T J -40 125 °C Operating Ambient Temperature T A -40 85 °C

Single Phase Synchronous Buck PWM Controller AP3581A/B/C Oct. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited

Electrical Characteristics

VCC=12V , TA=25°C, unless otherwise specified. Parameter Symbol Conditions Min Typ Max Unit SUPPLY INPUT Supply V oltage V CC 4.5 13.2 V Supply Current I CC UGATE and LGATE Pin Open; VCC=12V , Switching 5 mA Quiescent Supply Current I CC_Q VFB=VREF+0.1V , No Switching 4 mA Power Input V oltage V IN 3.0 13.2 V POWER ON RESET VCC Rising Threshold V POR V CC Rising 4.0 4.2 4.4 V VCC Threshold Hysteresis V POR_HYS 500 mV OSCILLATOR AP3581A/B 270 300 330 Oscillator Frequency f OSC AP3581C 180 200 220 kHz Ramp Amplitude ∆VOSC V CC=12V 1.8 V ERROR AMPLIFIER Open Loop DC Gain (Note 3) G DC_OL 55 70 dB Gain Bandwidth (Note 3) G BW 10 MHz Slew Rate (Note 3) SR 3 6 V/µs Transconductance 800 1100 µA/V Output Source Current V FB<VREF 80 120 µA Output Sink Current V FB>VREF 80 120 µA PWM CONTROLLER GATE DRIVERS Upper Gate Source Current I UG_SRC VBOOT-VPHASE=12V , VBOOT-VUGATE=6V -1 A Upper Gate Sink Current I UG_SNK VBOOT-VPHASE=12V , VBOOT-VUGATE=6V 1.5 A Upper Gate Sink Resistance R UGATE 50mA Sink Current, VBOOT-VPHASE=12V 1.6 3.2 Ω Lower Gate Source Current I LG_SRC V CC-VLGATE=6V -1 A Lower Gate Sink Current I LG_SNK V LGATE=6V 1.5 A Lower Gate Sink Resistance R LGATE 50mA Sink Current, VCC=12V 1 2 Ω PHASE Falling to LGATE Rising Delay VPHASE<1.2V to VLGATE>1.2V 50 ns

VCC=12V , TA=25ºC, unless otherwise specified. Note 3: Not tested, guaranteed by design. Figure 4. Line Regulation Figure 5. Load Regulation

Figure 14. Load Transient Response Figure 15. Load Transient Response

Single Phase Synchronous Buck PWM Controller AP3581A/B/C Oct. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited Typical Performance Characteristics (Continued) F i g u r e 1 8 . O v e r C u r r e n t P r o t e c t i o n Figure 19. Over Voltage Protection (VIN=12V, VOUT=1.2V to 0V, IOUT= 0 A ) ( V IN=12V, VOUT=1.2V, IOUT=20A) VOUT 1V/div VCOMP 0.5V/div VPHASE 10V/div IL 10A/div VFB 1V/div VLGATE 10V/div VUGATE 20V/div IL 10A/div Time 10ms/div Time 80µs/div

Figure 20. Typical Application Circuit of AP3581A/B/C

Single Phase Synchronous Buck PWM Controller AP3581A/B/C Oct. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited Mechanical Dimensions P S O P - 8 U n i t : m m ( i n c h ) 3.202(0.126) 3.402(0.134)

BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi- cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others. - Wafer Fab Shanghai SIM-BCD Semiconductor Manufacturing Limited 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 BCD Semiconductor Manufacturing Limited MAIN SITE REGIONAL SALES OFFICE Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. Shenzhen Office Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office Room E, 5F, Noble Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China Tel: +86-755-8826 7951 Fax: +86-755-8826 7865 Taiwan Office BCD Semiconductor (Taiwan) Company Limited 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel: +886-2-2656 2808 Fax: +886-2-2656 2806 USA Office BCD Semiconductor Corporation 30920 Huntwood Ave. Hayward, CA 94544, U.S.A Tel : +1-510-324-2988 Fax: +1-510-324-2788 - IC Design Group Advanced Analog Circuits (Shanghai) Corporation 8F, Zone B, 900, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com BCD Semiconductor Manufacturing Limited IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi- cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others. - Wafer Fab Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.

800 Yi Shan Road, Shanghai 200233, China

Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 MAIN SITE REGIONAL SALES OFFICE Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd., Shenzhen Office Unit A Room 1203, Skyworth Bldg., Gaoxin Ave.1.S., Nanshan District, Shenzhen, China Tel: +86-755-8826 7951 Fax: +86-755-8826 7865 Taiwan Office BCD Semiconductor (Taiwan) Company Limited 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel: +886-2-2656 2808 Fax: +886-2-2656 2806 USA Office BCD Semiconductor Corp. 30920 Huntwood Ave. Hayward, CA 94544, USA Tel : +1-510-324-2988 Fax: +1-510-324-2788 - Headquarters BCD Semiconductor Manufacturing Limited No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China Tel: +86-21-24162266, Fax: +86-21-24162277