Datasheet > HT7727A

HT7727A

更新时间： 2024-09-21 03:42:59

品牌	Logo	应用领域
台湾合泰/盛群 - HOLTEK		转换器
页数	文件大小	规格书
18页	365K
描述
PFM Step-up DC/DC Converter

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中文翻译

获取价格

技术参数
数据手册

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HT7727A 技术参数

生命周期：	Active	包装说明：	,
Reach Compliance Code：	unknown	风险等级：	5.73
模拟集成电路 - 其他类型：	SWITCHING REGULATOR	Base Number Matches：	1

HT7727A 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

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

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 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.

HT7727A

HT7730A

HT7733A

HT7750A

Output Voltage

Package

Marking

2.7V

3.0V

3.3V

5.0V

TO-92

SOT-89

SOT-23

SOT-25

HT77XXA (for TO-92)

HT77XXA# (for SOT-89)

77XXA# (for SOT-23)

77XXA# (for SOT-25)

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 1.10

September 26, 2007

12 3 4 5 6 7...18

中文翻译

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HT7727S	HOLTEK	获取价格	100mA PFM Synchronous Step-up DC/DC Converter
HT7727S(SOT-23-5)	HOLTEK	获取价格	Switching Regulator/Controller
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HT7727SA	HOLTEK	获取价格	Switching Regulator,
HT7727SA(SOT-23)	HOLTEK	获取价格	Switching Regulator/Controller, Voltage-mode, 0.2A, 500kHz Switching Freq-Max, CMOS
HT7727SA(SOT-23-5)	HOLTEK	获取价格	Switching Regulator/Controller, Voltage-mode, 0.2A, 500kHz Switching Freq-Max, CMOS, PDSO5
HT7727SA(SOT-89)	HOLTEK	获取价格	Switching Regulator/Controller, Voltage-mode, 0.2A, 500kHz Switching Freq-Max, CMOS