Diodes AP3432 Manual de usuario descargar pdf

Data Sheet

1.5MHz, 2.5A, Step-down DC-DC Converter AP3432

Jun. 2013 Rev. 1. 1 BCD Semiconductor Manufacturing Limited

General Description

The AP3432 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.

Additional features including Soft Start (SS), Under

Voltage Lock Out (UVLO), Thermal Shutdown

Detection (TSD) and short circuit protection are

integrated to provide reliable product applications.

The device is available in adjustable output voltage

versions ranging from 0.8V to V

when input

voltage range is from 2.7V to 5.5V, and is able to

deliver up to 2.5A.

The AP3432 is available in DFN-3×3-6 package.

Features

• High Efficiency Buck Power Converter

• Low R

DS(ON)

Internal Switches : 100m

• Output Current: 2.5A

• Adjustable Output Voltage from

0.8V to V

• Wide Operating Voltage Range: 2.7V to 5.5V

•

4Built-in Power Switchers for Synchronous

Rectification with High Efficiency

• Feedback Voltage Allows Output: 800mV

• 1.5MHz Switching Frequency

• Thermal Shutdown Protection

• Low Drop-out Operation at 100% Duty Cycle

• No Schottky Diode Required

• Input Over Voltage Protection

Applications

• LCD TV

• Set Top Box

• Post DC-DC Voltage Regulation

• PDA and Notebook Computer

Figure 1. Package Type of AP3432

DFN-3×3-6

1 2 3 4 5 6 ... 17 18