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Data Sheet

1.5MHz, 2A, STEP DOWN DC-DC CONVERTER AUR9719

Nov. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited

General Description

The AUR9719 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 MOS 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

versions ranging from 0.8V to 9×V

when input

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

deliver up to 2.0A.

The AUR9719 is available in DFN-3×3-6 package.

Features

• High Efficiency Buck Power Converter

• Output Current: 2A

• Low R

DS(ON)

Internal Switch: 100mΩ

• Adjustable Output Voltage from

0.8V to 9×V

• Wide Operating Voltage Range: 2.7V to 5.5V

•

Built-in Power Switches for Synchronous

Rectification with High Efficiency

• 800mV Feedback Voltage

• 1.5MHz Constant Frequency Operation

• Thermal Shutdown Protection

• Low Drop-out Operation at 90% Duty Cycle

• No Schottky Diode Required

Applications

• LCD TV

• Set Top Box

• Post DC-DC Voltage Regulation

• PDA and Notebook Computers

Figure 1. Package Type of AUR9719

DFN-3×3-6

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