APW7075 データシートの表示（PDF） - Anpec Electronics

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APW7075

Step-Up Converter and LDO Combo

Anpec Electronics 

APW7075

Step-Up Converter and LDO Combo

Features

General Description

• Built-In a 500mA LDO and Synchronous Step-Up

DC-DC Converter

• Built-In PWM/PFM Operating Mode

• Provided Dual Input Power Sources

• Connect FB to OUT for 3.3V Output Voltage or

GND for 2.5V Output Voltage or an External

Resistor Divider for Adjustable Output Voltage.

• Fixed 300KHz Operating Frequency

• High Efficiency Up to 94% at 200mA Output

Current

• 0.6V to 4.5V Operating Voltage

• 1V Start Up Input Voltage

• Low Battery Voltage Detection

• Reverse Voltage Protection

• Internal Synchronous Rectifier

• Automatic Detection Input Voltage

• Compact SOP-8-P and TSSOP-8 Packages

• Lead Free Available (RoHS Compliant)

Applications

• Dual Mode Power System

• USB Peripheral

• Camcorders and Digital Camera

• Hand-held Instrument

• PDAs

The APW7075 is a PWM/PFM, high-efficiency and

step-up DC-DC converter with an integrated LDO input

switch for dual mode application. During battery mode

operation, the APW7075 acts as synchronous recti-

fier and step-up DC-DC converter with a fixed or ad-

justable output voltage. When the VIN pin sense 5V

input voltage, the APW7075 is switched to LDO op-

eration mode, maintaining the constant output voltage.

The input voltage ranges from 0.6 V to 4.5V for step-

up DC-DC converter. The start-up is guaranteed at1V

and the device is operating down to 0.6V. When the

device is at LDO operating mode, the suitable output

voltage 3.3V and loading current 500mA for maximum

power consumption are guaranteed.

The APW7075 is suited for dual mode and portable

battery powered appliance with low-battery detector.

In dual-mode applications, the APW7075 draws power

from any available 5V USB connection and reverts to

battery power when the USB power is removed.

Pin Description

TSSOP-8 Top View

VIN

1

FB

2

SHDN

3

LBI

4

8

OUT

7

LX

6

GND

5

LBO

SOP-8-P Top View

VIN

1

FB

2

SHDN

3

LBI

4

8

OUT

7

LX

6

GND

5

LBO

= Thermal Pad

(connected to GND plane for better heat

dissipation)

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise

customers to obtain the latest version of relevant information to verify before placing orders.

Copyright © ANPEC Electronics Corp.

1

Rev. A.5 - Aug., 2005

www.anpec.com.tw

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