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Diodes AP3417C User Manual

Ap3417c preliminary datasheet, Description, Features

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AP3417C

Document number: DS36516 Rev. 1 - 0

1 of 11

www.diodes.com

September 2013

© Diodes Incorporated

AP3417C

PRELIMINARY DATASHEET

A Product Line of

Diodes Incorporated

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
from 0.6V to 0.9×V

IN

when input voltage range is from 2.5V to 5.5V,

and is able to deliver up to 1A. It is also available in fixed voltage
versions of 1.2V, 1.8V and 3.3V without external feedback resistance.

The AP3417C is available in SOT-23-5 and DFN-2×2-6 packages.

Features

High Efficiency Buck Power Converter

Wide Input Voltage Range: 2.5V to 5.5V

Adjustable Output Voltage: 0.6V to 0.9×V

IN

 Low

R

DS(ON)

Internal Switches:200m

 (V

IN

= 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

Pin Assignments


K Package DN Package

(SOT-23-5) (DFN-2×2-6)

EN

GND

LX

FB

VIN

1

2

3

4

5




Applications

Post DC-DC Voltage Regulation

PDA and Notebook Computer








Typical Applications Circuit

For ADJ Version