Datasheet > HT7718(SOT-25)

HT7718(SOT-25)

更新时间： 2024-11-08 14:42:39

品牌	Logo	应用领域
台湾合泰/盛群 - HOLTEK		LTE
页数	文件大小	规格书
19页	503K
描述
Switching Regulator/Controller

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中文翻译

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技术参数
数据手册

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HT7718(SOT-25) 技术参数

生命周期：	Contact Manufacturer	Reach Compliance Code：	unknown
风险等级：	5.77	Base Number Matches：	1

HT7718(SOT-25) 数据手册

HT77XX

PFM Step-up DC/DC Converter

Features

Low start-up voltage: 0.7V (Typ.), 0.9V (Max.)

Ultra low supply current I_DD2: 4mA (Typ.)

Low ripple and low noise

High efficiency: 85% (Typ.), V_OUT³2.7V

High output voltage accuracy: ±2.5%

Low shutdown current: 0.5mA (Typ.)

TO-92, SOT-89, SOT-23 and SOT-25 package

Output voltage: 1.8V, 2.7V, 3.0V, 3.3V, 3.7V, 5.0V

Output current up to 100mA

Applications

Palmtops/PDAs

Cameras/Camcorders

Portable communicators/Smartphones

Battery-powered equipment

General Description

The HT77XX series is a set of PFM step-up DC/DC con-

verter with high efficiency and low ripple. The series fea-

tures extremely low start-up voltage and high output

voltage accuracy. They require only three external com-

ponents to provide a fixed output voltage of 1.8V, 2.7V,

3.0V, 3.3V, 3.7V or 5.0V. CMOS technology ensures ul-

tra low supply current and makes them ideal for bat-

tery-operated applications powered from one or more

cells.

The HT77XX consists of an oscillator, a PFM control cir-

cuit, 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 TO-92, SOT-89, SOT-23 and SOT-25

packages. For SOT-25 package, it also build-in a chip

enable function to reduce power consumption during

shutdown mode.

Selection Table

Part No.

HT7718

HT7727

HT7730

HT7733

HT7737

HT7750

Output Voltage

1.8V

Package

Marking

2.7V

TO-92

SOT-89

SOT-23

SOT-25

HT77XX (for TO-92)

HT77XX# (for SOT-89)

77XX# (for SOT-23)

77XX# (for SOT-25)

3.0V

3.3V

3.7V

5.0V

Note:

²XX² stands for output voltages.

Only lead free devices are available. ²#² stands for lead free devices. For the TO-92 package, there will be a

²#² mark at the end of the date code.

Block Diagram

Rev 1.70

March 13, 2008

12 3 4 5 6 7...19

中文翻译

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