AP65111

Document number: DS39153 Rev. 3 - 3

1 of 14

www.diodes.com

January 2018

© Diodes Incorporated

AP65111

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

Description

The

AP65111

is

a

500kHz

switching

frequency

internally

compensated synchronous DC/DC buck converter. It has integrated

low RDS(ON) high and low side MOSFETs.

The AP65111 enables continuous load current of up to 1.5A with

efficiency as high as 97%.

The AP65111 implements an automatic custom light-load efficiency

improvement algorithm.

The AP65111 features current mode control operation, which enables

fast transient response times and easy loop stabilization.

The

AP65111

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 AP65111 is available in a standard Green TSOT26 package and

is RoHS compliant.

Features



VIN 6V to 16V



1.5A Continuous Output Current



Efficiency Up to 97%



Automated Light Load Improvement



VOUT Adjustable from 0.8V



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

TSOT26

Top View

3

2

1

6

4

5

IN

GND

SW

FB

EN

BST

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

AP65111

L1

6.5

μH

R1

40.2k

Ω

R2

13k

Ω

C5

1µ

F

C2

22

μF

C1

22

μF

ON

OFF

1

IN

5

EN

2

SW

4

BST

6

FB

3

GND

INPUT

OUTPUT

VOUT

3.3V

VIN

12V

R3

59k

Ω

Figure 1. Typical Application Circuit

VIN=6V

VIN=12V

VIN=16V

NOT RECOMMENDED FOR NEW DESIGN

USE AP65111A