Datasheet > HT74153

HT74153

更新时间： 2024-11-11 15:19:27

品牌	Logo	应用领域
台湾合泰/盛群 - HOLTEK		/
页数	文件大小	规格书
19页	1475K
描述
6.0V/2.0A/1.2MHz Synchronous Step-Down Converter

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中文翻译

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HT74153 数据手册

HT74153

6.0V / 2.0A / 1.2MHz Synchronous

Step-Down Converter

Features

General Description

• Wide input range of V_INfrom 2.5V to 6.0V

• Output voltage range from 0.6V to V_DD

• Internal low on-resistance switches

The HT74153 is a high efficiency synchronous

step-down converter capable of delivering 2A

output current. It can operate over a wide input voltage

range from 2.5V to 6.0V and integrates 100mΩ low

on-resistance main and rectified switches to

minimize the conduction losses. Up to 1.2MHz

switching frequency in PWM allows to use the small

surface mount inductors and capacitors in applications.

♦

High-Side R_DS(ON)100mΩ

♦

Low-Side R_DS(ON)100mΩ

• 100% duty cycle operation

• Switching frequency: 1.2MHz

The automatically PWM/PFM mode switching is

useful to drive up to 2A load current and also

decrease its standby current in no load condition. The

Hysteretic PFM mode extends the battery life by

reducing the quiescent current during the system

standby. In the shutdown mode, the device turns oﬀ

and consumes only 0.1μA input current.

• PFM mode operation when no load/light load

conditions

• Output voltage power good indicator when

V_OUT=0.95×V_OUT(TARGET)(8SOP-EP)

• Low IC surface temperature in short circuit

protection

• Protection features

The HT74153 also provides 100% duty cycle

operation. When the input supply voltage decreases

toward the targeted output voltage, the High-Side

MOSFET will always turn on and the output voltage

tracks the input voltage, which can extend the battery

life.

♦

V_DDunder voltage lock-out

♦

Cycle-by-Cycle over current protection

♦

Thermal shutdown protection

♦

Output short-circuit protection

♦

Output over-voltage protection

• Package types: 8-pin SOP-EP and 5-pin SOT23

Applications

• Single Li-Battery applications and small motor

driver applications

• Rechargeable AA batteries

• Laser demarcation device

• Portable toy

• 5V USB/Adaptor power source

• 3.3V DC source

Rev. 1.10

August 26, 2023

12 3 4 5 6 7...19

中文翻译

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