Datasheet > HT74173

HT74173

更新时间： 2024-03-03 10:09:34

品牌	Logo	应用领域
台湾合泰/盛群 - HOLTEK		/
页数	文件大小	规格书
20页	2077K
描述
6.0V, 3.0A, 1.2MHz Synchronous Step-Down Converter

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HT74173 数据手册

HT74173

6.0V, 3.0A, 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 HT74173 is a high efficiency synchronous step-

down converter capable of delivering 3A output

current. It can operate over a wide input voltage range

from 2.5V to 6.0V and integrates 80mΩ 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)80mΩ

♦

Low-Side R_DS(ON)80mΩ

• 100% Duty Cycle Operation

• Switching Frequency: 1.2MHz

The automatically PWM/PFM mode switching is

• PFM Mode Operation When No Load/Light Load

Conditions

useful to drive up to 3A 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.

• Output Voltage Power Good Indicator When

V_OUT=0.93×V_OUT(TARGET)(8SOP-EP)

• Protection Features:

♦

V_DDUnder Voltage Lock-Out

♦

Cycle-by-Cycle Over Current Protection

The HT74173 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.

♦

Thermal Shutdown Protection

♦

Output Short-Circuit Protection

♦

Output Over-Voltage Protection

• Package Types: 8-pin SOP-EP, 5-pin SOT23 and

5-pin SOT89

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. 1.00

August 26, 2023

12 3 4 5 6 7...20

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