AP3583/A

Document number: DS41575 Rev. 3- 2

1 of 12

www.diodes.com

November 2018

© Diodes Incorporated

AP3583/A

SINGLE PHASE SYNCHRONOUS BUCK PWM CONTROLLER WITH REFERENCE INPUT

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.

Features



Supply Voltage: 5V/12V



VIN Input Range: 3.0V to 13.2V

0.6V to 80% of VIN Output Range

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

(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



Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)



Halogen and Antimony Free.

“Green” Device (Note 3)

Pin Assignments

(Top View)

1

2

3

4

8

7

6

5

BOOT

UGATE

OPS

LGATE

PHASE

REFIN

FB

VCC

GND

9

PSOP-8

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

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.

2. See https://www.diodes.com/quality/lead-

free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and

Lead-free.

3. Halogen- and Antimony-

free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.