AP3417C

Document number: DS36516 Rev. 2 - 2

1 of 12

www.diodes.com

May 2016

© Diodes Incorporated

AP3417C

1.5MHz SYNCHRONOUS STEP-DOWN DC-DC CONVERTER

Description

The AP3417C is a high efficiency step-down DC-DC voltage

converter. The chip operation is optimized by peak-current mode

architecture with built-in synchronous power MOSFET switchers. The

oscillator and timing capacitors are all built-in providing an internal

switching frequency of 1.5MHz that allows the use of small surface

mount inductors and capacitors for portable product implementations.

Integrated Soft Start (SS), Under Voltage Lock Out (UVLO), Thermal

Shutdown Detection (TSD) and Short Circuit Protection are designed

to provide reliable product applications.

The device is available in adjustable output voltage version ranging

and is able to deliver up to 1A.

The AP3417C is available in SOT-23-5 and W-DFN2020-6 (Type US)

packages.

Features



High Efficiency Buck Power Converter



Wide Input Voltage Range: 2.5V to 5.5V







Built-in Power Switches for Synchronous Rectification with High

Efficiency



Output Current: 1.0A



Feedback Voltage: 600mV



1.5MHz Constant Frequency Operation



Thermal Shutdown Protection



Low Dropout Operation at 100% Duty Cycle



No Schottky Diode Required



Input Over Voltage Protection



Output Over Voltage Protection



Over Current Protection



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



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

Pin Assignments

(Top View)

(Top View)

EN

GND

LX

FB

VIN

1

2

3

4

5

NC

EN

VIN

FB

GND

LX

Pin 1 Mark

1

2

3

4

5

6

EP

SOT-23-5

W-DFN2020-6 (Type US)

Applications



Post DC-DC Voltage Regulation



PDA and Notebook Computer

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.