Diodes AP3583, AP3583A User Manual

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Data Sheet

General Description

The AP3583/A is a simple single-phase synchronous buck controller. It operates from 5V or 12V supply voltage and delivers high quality output voltage as low as 0.6V. This device operates at fixed 200kHz (AP3583) or 300kHz (AP3583A) frequency and provides an optimum compromise between efficiency, external component size and cost.

With integrated linear regulator bootstrap diode, and N-Channel MOSFET gate drives, the AP3583/A can reduce external component count and board space requirements.

The AP3583/A supports both tracking mode and stand-alone mode operation. The output voltage is tightly regulated to the external reference voltage from 0.4V to 3V at tracking mode or internal 0.6V reference at stand-alone mode.

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

The AP3583/A is available in PSOP-8 package.

Figure 1. Package Type of AP3583/A

Features

• Supply Voltage: 5V/12V

• V

• 0.6V to 80% of V

• Internal Reference: 0.6V

• Support Tracking Mode and Stand-alone Mode

• Simple Single-loop Control

• Voltage-mode PWM Control

• Duty Cycle: 0% to 80%

• Fast Transient Response

• Fixed Oscillator Frequency: 200/300kHz

• Lossless, Programmable Over Current Protection

• Start-up into Pre-biased Output

• Built-in Thermal Shutdown

• Built-in Soft-start

• Over Current/Voltage Protection

• Under Voltage Protection

• Integrated Boot Diode

Input Range: 3.0V to 13.2V

Output Range

(Uses Lower MOSFET R

DS(ON)

)

Applications

• Power Supplies for Microprocessors/Peripherals

PCs, Embedded Controllers, Memory Supplies

•

• DSP and Core Communications Processor

Supplies

• Subsystem Power Supplies

• PCI, AGP, Graphics Cards and 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

Dec. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

Data Sheet

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Pin Configuration

MP Package

(PSOP-8)

Figure 2. Pin Configuration of AP3583/A (Top View)

Pin Description

Pin Number Pin Name Function

Bootstrap pin. Connect a bootstrap capacitor (Typically from 0.1

1 BOOT

2 UGATE

3 OPS

4 LGATE

5 VCC

6 FB

7 REFIN

8 PHASE

9 GND

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

roviding 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 (R 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 been 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. A resistor divider from output to GND is used to set the output voltage External reference input pin. This pin receives a voltage with range from 0.4V to 3.0V as the reference voltage at the non-inverting input of the error amplifier. Pull this pin lower than

0.3V to disable the controller, and the V low. Let this pin open for internal 0.6V reference use 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 is turned off Exposed pad as ground pin. Represents the signal and power ground for the IC. Tie this pin to ground island/plane through the lowest impedance connection available

) between

OCSET

UGATE

and V

LGATE

will go

Dec. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

Data Sheet

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Functional Block Diagram

VCC

BOOT

UGATE

PHASE

LGATE

OPS

4V INT

PWM

INTERNAL

REGULATOR

GATE

CONTROL

LOGIC

OCP

COMPARATOR

VCC

REFIN

OTP

REFERENCE

SELECTION

0.3V

137.5%V

SOFT-START

OSCILLATOR

ERROR

AMPLIFIER

0.6V

ENABLE

REF

OVP

POWER-ON RESET

(POR)

PWM

COMPARATOR

GND

Figure 3. Functional Block Diagram of AP3583/A

Ordering Information

AP3583 -

Circuit Type

Blank: AP3583 A: AP3583A

Package MP: PSOP-8

Package

Temperature

Range

Part Number Marking ID Packing Type

AP3583MP-G1 3583MP-G1 Tube

PSOP-8 -40 to 85°C

AP3583MPTR-G1 3583MP-G1 Tape & Reel

AP3583AMP-G1 3583AMP-G1 Tube

AP3583AMPTR-G1 3583AMP-G1 Tape & Reel

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

Dec. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

G1: Green

Blank: Tube TR: Tape & Reel

Data Sheet

Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A

Absolute Maximum Ratings (Note 1)

Parameter Symbol Value Unit

Supply Voltage VCC -0.3 to 15 V

BOOT Voltage V

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) 2000 V

ESD (Machine Model) (Note 2) 200 V

-0.3 to V

BOOT

UGATE

PHASE

LGATE

STG

LEAD

+15 V

PHASE

-0.3 to 15 V

-1 to 15 V

-0.3 to 6 V

50 ºC/W

-40 to 125 ºC

-65 to 150 ºC

260 ºC

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 Symbol Min Max Unit

Supply Input Voltage VCC 4.5 13.2 V

Operating Junction Temperature TJ -40 125

Operating Ambient Temperature TA -40 85

°C

Dec. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

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