Datasheet > HT7730A(SOT-23)

HT7730A(SOT-23)

更新时间： 2024-11-11 08:03:35

品牌	Logo	应用领域
台湾合泰/盛群 - HOLTEK		/
页数	文件大小	规格书
17页	371K
描述
Switching Regulator/Controller

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HT7730A(SOT-23) 数据手册

HT77XXA

PFM Step-up DC/DC Converter

Features

Low start-up voltage: 0.7V (Typ.)

Ultra low supply current I_DD: 5mA (Typ.)

High efficiency: 85% (Typ.)

Low ripple and low noise

High output voltage accuracy: ±2.5%

Low shutdown current: 0.5mA (Typ.)

Output voltage: 2.7V, 3.0V, 3.3V, 5.0V

TO92, SOT89, SOT23 and SOT23-5 package

Output current up to 200mA

Applications

Palmtops/PDAs

Cameras/Camcorders

Portable communicators/Smartphones

Battery-powered equipment

General Description

The HT77XXA series is a set of PFM step-up DC/DC

converter with high efficiency and low ripple. The series

features extremely low start-up voltage and high output

voltage accuracy. They require only three external com-

ponents to provide a fixed output voltage of 2.7V, 3.0V,

3.3V or 5.0V. CMOS technology ensures ultra low sup-

ply current and makes them ideal for battery-operated

applications powered from one or more cells.

The HT77XXA consists of an oscillator, a PFM control

circuit, a driver transistor, a reference voltage unit, and a

high speed comparator. They employ pulse frequency

modulation (PFM) for minimum supply current and rip-

ple at light output loading. These devices are available

in space saving TO92, SOT89, SOT23 and SOT23-5

packages. For SOT23-5 package, it also build-in a chip

enable function to reduce power consumption during

shutdown mode.

Selection Table

Part No.

HT7727A

HT7730A

HT7733A

HT7750A

Output Voltage

Package

Marking

2.7V

3.0V

3.3V

5.0V

TO92

SOT89

SOT23

SOT23-5

HT77XXA (for TO92)

HT77XXA# (for SOT89)

7XXA# (for SOT23)

7XXA# (for SOT23-5)

Note:

²XX² stands for output voltages.

Only lead free devices are available. ²#² stands for lead free devices. For the TO92 package, there will be a ²#²

mark at the end of the date code.

Block Diagram

Rev 1.30

September 24, 2008

12 3 4 5 6 7...17

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