AP65111A

Document number: DS39760 Rev. 1 - 2

1 of 13

www.diodes.com

June 2017

© Diodes Incorporated

AP65111A

TSOT26 LIGHT LOAD IMPROVED 1.5A SYNCH DC/DC BUCK CONVERTER

Description

The

AP65111A

is

a

500kHz

switching

frequency

internal

compensated synchronous DC/DC buck converter. It has integrated

The AP65111A enables continuous load current of up to 1.5A with

efficiency as high as 97%.

The AP65111A implements an automatic custom light load efficiency

improvement algorithm.

The AP65111A features current mode control operation, which

enables fast transient response time and easy loop stabilization.

The

AP65111A

simplifies

board

layout

and

reduces

space

requirements with its high level of integration and minimal need for

external

components,

making

it

ideal

for

distributed

power

architectures.

The AP65111A is available in a standard Green TSOT26 package

and is RoHS compliant.

Features





1.5A Continuous Output Current



Efficiency Up to 97%



Automated Light Load Improvement





500kHz Switching Frequency



Internal Soft-Start



Enable Pin



Overvoltage Protection & Undervoltage Protection



Overcurrent Protection (OCP) with Hiccup



Thermal Protection



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



Halogen

and Antimony Free. “Green” Device (Note 3)

Pin Assignments

(Top View)

3

2

1

6

4

5

IN

GND

SW

FB

EN

BST

TSOT26

Applications



Gaming Consoles



Flat Screen TV Sets and Monitors



Set-Top Boxes



Distributed Power Systems



Home Audio



Consumer Electronics



Network Systems



FPGA, DSP and ASIC Supplies



Green Electronics

Notes:

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

2. See http://www.diodes.com/quality/lead_free.html 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.

Typical Applications Circuit

AP65111A

L1

6.5μH

R1

40.2k

Ω

R2

13k

Ω

C5

1µF

C2

22μF

C1

22μF

ON

OFF

1

IN

5

EN

3

SW

4

BST

6

FB

2

GND

INPUT

OUTPUT

3.3V

12V

R3

59k

Ω

Figure 1. Typical Application Circuit