AP3581BMP-G1

AP3581BMP-G1 Datasheet

AP3581A/B/C

Part	Datasheet
AP3581BMP-G1	AP3581BMP-G1 (pdf)

Related Parts	Information
AP3581AMP-G1	AP3581AMP-G1
AP3581AMPTR-G1	AP3581AMPTR-G1
AP3581CMP-G1	AP3581CMP-G1
AP3581CMPTR-G1	AP3581CMPTR-G1

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OBSOLETE Data Sheet Single Phase Synchronous Buck PWM Controller AP3581A/B/C ified buck controller specifically designed to operate from 5V/12V supply and deliver high-quality output voltage as low as 0.6V AP3581A or 0.8V AP3581B/C . The AP3581A/B/C operates at fixed frequency of 300kHz AP3581A/B or 200kHz AP3581C and provides an optimal level of integration to reduce size and cost of the power supply. This controller integrates internal MOSFET drivers that support 12V+12V bootstrapped voltage for highefficiency power conversion. The bootstrap diode is built-in to simplify the circuit design and minimize external part count. This controller provides single feedback loop, voltage-mode control with fast transient response. The error amplifier features a 10MHz gain-bandwidth product and 6V/µs slew rate which enables high converter bandwidth for fast transient performance. Other features include internal soft-start, under voltage protection, over current protection and shutdown function. With afore-mentioned functions, this part provides customers a compact, high efficiency, well-protected and cost-effective solutions. The AP3581A/B/C is available in PSOP-8 package. • Supply Voltage 5V/12V • VIN Input Range 3.0V to 13.2V • 0.6V/0.8V to 80% of VIN Output Range • Internal Reference 0.6V/0.8V • Simple Single-loop Control • Voltage-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, Programmable Over Current Protection Uses Lower MOSFET RDS ON • Start-up into Pre-biased Output • Built-in Thermal Shutdown • Built-in Soft-start • Over Current/Voltage Protection • Under Voltage Protection • Integrated Boot Diode • 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 PSOP-8 Figure Package Type of AP3581A/B/C BCD Semiconductor Manufacturing Limited 1 Single Phase Synchronous Buck PWM Controller Pin Configuration MP Package PSOP-8 Data Sheet AP3581A/B/C Figure Pin Configuration of AP3581A/B/C Top View Pin Description Pin Number Pin Name BOOT UGATE LGATE COMP/EN PHASE Function Bootstrap pin. Connect a bootstrap capacitor Typically from 0.1µF to 0.47µF from this pin to PHASE pin to create a BOOT voltage suitable to drive a standard N-Channel MOSFET Upper-gate drive pin. Connect this pin to the upper MOSFET gate providing the gate drive. This pin is monitored by the adaptive shoot-through protection circuitry to determine when the upper MOSFET has been turned off Over-current setting pin. Connecting a resistor ROCSET between OPS and GND to set the over-current trigger point Lower-gate drive pin. Connect LGATE to the lower MOSFET gate providing the gate drive for the lower MOSFET. This pin is monitored by the adaptive shoot-through protection circuitry to determine when the lower MOSFET has turned off Bias supply pin. Provides a 5V or 12V bias supply for the chip from this pin. The pin should be bypassed with a capacitor to GND Feedback pin. This pin is the inverting input of the internal error amplifier. Use FB pin, in combination with the COMP pin, to compensate the voltage control feedback loop of the converter. A resistor divider from output to GND is used to set the output voltage Compensation and disable pin, this pin is the output of the error amplifier. Pull COMP pin low will shut down the IC PHASE pin. This pin connects to the source of the upper MOSFET and the drain of the lower MOSFET. This pin is also monitored by the adaptive shoot-through protection circuitry to determine when the upper MOSFET has turned off Exposed pad as ground pin. Represents the signal and power ground for the IC. Tie this pin to the ground island/plane through the lowest impedance connection available BCD Semiconductor Manufacturing Limited 2 Single Phase Synchronous Buck PWM Controller Functional Block Diagram Data Sheet AP3581A/B/C Figure Functional Block Diagram of AP3581A/B/C Ordering Information AP3581 A - Package Circuit Type A:AP3581A B:AP3581B C:AP3581C Package MP PSOP-8 Temperature Range AP3581AMP-G1 AP3581AMPTR-G1 PSOP-8 -40 to 85°C AP3581BMP-G1 AP3581BMPTR-G1 AP3581CMP-G1 AP3581CMPTR-G1 G1 Green Blank Tube TR Tape & Reel Marking ID 3581AMP-G1 3581AMP-G1 3581BMP-G1 3581BMP-G1 3581CMP-G1 3581CMP-G1 Packing Type Tube Tape & Reel Tube Tape & Reel Tube Tape & Reel BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green. BCD Semiconductor Manufacturing Limited Single Phase Synchronous Buck PWM Controller Absolute Maximum Ratings Note 1 Data Sheet AP3581A/B/C Parameter Supply Voltage BOOT Voltage from UGATE to PHASE Voltage from PHASE, LGATE Pin to GND Voltage on Other Separate Pin Thermal Resistance Operating Junction Temperature Storage Temperature Lead Temperature Soldering, 10 sec ESD Human Body Model Note 2 ESD Machine Model Note 2 VCC VBOOT VUGATE VPHASE, VLGATE TJ TSTG TLEAD Value to 15 to VPHASE +15 to 15 -1 to 15 to 6 50 -40 to 125 -65 to 150 260 2000 200 Unit V ºC/W ºC ºC ºC 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 Conditions” 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 Supply Input Voltage Operating Junction Temperature Range Operating Ambient Temperature VCC TJ TA

PDF Datasheet Preview

OBSOLETE

Data Sheet

Single Phase Synchronous Buck PWM Controller

AP3581A/B/C
ified buck controller specifically designed to operate from 5V/12V supply and deliver high-quality output voltage as low as 0.6V AP3581A or 0.8V AP3581B/C . The AP3581A/B/C operates at fixed frequency of 300kHz AP3581A/B or 200kHz AP3581C and provides an optimal level of integration to reduce size and cost of the power supply.

This controller integrates internal MOSFET drivers that support 12V+12V bootstrapped voltage for highefficiency power conversion. The bootstrap diode is built-in to simplify the circuit design and minimize external part count.

This controller provides single feedback loop, voltage-mode control with fast transient response. The error amplifier features a 10MHz gain-bandwidth product and 6V/µs slew rate which enables high converter bandwidth for fast transient performance.

Other features include internal soft-start, under voltage protection, over current protection and shutdown function. With afore-mentioned functions, this part provides customers a compact, high efficiency, well-protected and cost-effective solutions.

The AP3581A/B/C is available in PSOP-8 package.
• Supply Voltage 5V/12V
• VIN Input Range 3.0V to 13.2V
• 0.6V/0.8V to 80% of VIN Output Range
• Internal Reference 0.6V/0.8V
• Simple Single-loop Control
• Voltage-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, Programmable Over Current Protection

Uses Lower MOSFET RDS ON
• Start-up into Pre-biased Output
• Built-in Thermal Shutdown
• Built-in Soft-start
• Over Current/Voltage Protection
• Under Voltage Protection
• Integrated Boot Diode
• 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

PSOP-8

Figure Package Type of AP3581A/B/C

BCD Semiconductor Manufacturing Limited 1

Single Phase Synchronous Buck PWM Controller

Pin Configuration

MP Package PSOP-8

Data Sheet AP3581A/B/C

Figure Pin Configuration of AP3581A/B/C Top View

Pin Description

Pin Number

Pin Name

BOOT

UGATE

LGATE

COMP/EN

PHASE

Function

Bootstrap pin. Connect a bootstrap capacitor Typically from 0.1µF to 0.47µF from this pin to PHASE pin to create a BOOT voltage suitable to drive a standard N-Channel MOSFET Upper-gate drive pin. Connect this pin to the upper MOSFET gate providing the gate drive. This pin is monitored by the adaptive shoot-through protection circuitry to determine when the upper MOSFET has been turned off Over-current setting pin. Connecting a resistor ROCSET between OPS and GND to set the over-current trigger point Lower-gate drive pin. Connect LGATE to the lower MOSFET gate providing the gate drive for the lower MOSFET. This pin is monitored by the adaptive shoot-through protection circuitry to determine when the lower MOSFET has turned off Bias supply pin. Provides a 5V or 12V bias supply for the chip from this pin. The pin should be bypassed with a capacitor to GND Feedback pin. This pin is the inverting input of the internal error amplifier. Use FB pin, in combination with the COMP pin, to compensate the voltage control feedback loop of the converter. A resistor divider from output to GND is used to set the output voltage Compensation and disable pin, this pin is the output of the error amplifier. Pull COMP pin low will shut down the IC PHASE pin. This pin connects to the source of the upper MOSFET and the drain of the lower MOSFET. This pin is also monitored by the adaptive shoot-through protection circuitry to determine when the upper MOSFET has turned off Exposed pad as ground pin. Represents the signal and power ground for the IC. Tie this pin to the ground island/plane through the lowest impedance connection available

BCD Semiconductor Manufacturing Limited 2

Single Phase Synchronous Buck PWM Controller Functional Block Diagram

Data Sheet AP3581A/B/C

Figure Functional Block Diagram of AP3581A/B/C
Ordering Information

AP3581 A -

Package

Circuit Type A:AP3581A B:AP3581B C:AP3581C

Package MP PSOP-8

Temperature Range

AP3581AMP-G1

AP3581AMPTR-G1

PSOP-8
-40 to 85°C

AP3581BMP-G1 AP3581BMPTR-G1

AP3581CMP-G1

AP3581CMPTR-G1

G1 Green

Blank Tube TR Tape & Reel

Marking ID
3581AMP-G1 3581AMP-G1 3581BMP-G1 3581BMP-G1 3581CMP-G1 3581CMP-G1

Packing Type

Tube Tape & Reel

Tube Tape & Reel

Tube Tape & Reel

BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green.

BCD Semiconductor Manufacturing Limited

Single Phase Synchronous Buck PWM Controller Absolute Maximum Ratings Note 1

Data Sheet AP3581A/B/C

Parameter

Supply Voltage BOOT Voltage from UGATE to PHASE Voltage from PHASE, LGATE Pin to GND Voltage on Other Separate Pin Thermal Resistance Operating Junction Temperature Storage Temperature Lead Temperature Soldering, 10 sec ESD Human Body Model Note 2 ESD Machine Model Note 2

VCC VBOOT VUGATE VPHASE, VLGATE

TJ TSTG TLEAD

Value
to 15 to VPHASE +15
to 15 -1 to 15 to 6
50 -40 to 125 -65 to 150
260 2000 200

Unit

V ºC/W ºC ºC ºC 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 Conditions” 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

Supply Input Voltage Operating Junction Temperature Range Operating Ambient Temperature

VCC TJ TA

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Datasheet ID: AP3581BMP-G1 509846