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

Recommended Operating Range

Parameter

VDD, AVDD

I_OUT(MAX)

Value

2.5 to 6.0

3.0

Unit

Note that Absolute Maximum Ratings indicate limitations beyond which damage to the device may occur.

Recommended Operating Ratings indicate conditions for which the device is intended to be functional, but do not

guarantee speciﬁed performance limits.

Electrical Characteristics

V_DD=AV_DD=3.6V, Ta=25°C, unless otherwise speciﬁed

Symbol

Parameter

Test Condition

Min.

Typ. Max. Unit

Supply Voltage

V_DD

Input Voltage

—

2.5

—

170

6.0

210

I_AVDD+I_VDD,PWM, V_FB=0.58V

I_AVDD+I_VDD,PFM, V_FB=0.62V

I_AVDD+I_VDD,V_AVDD=V_VDD=5V, V_EN=0V

I_DD

Input Supply Current

μA

I_OFF

Shutdown Current

0.1

0.5

Buck Converter

V_OUT

f_SW

Output Voltage

Switching Frequency

—

0.6

960

—

V_DD

kHz

V_FB=0.58V

1200 1440

T_ON(min)Minimum ON-Time

—

100

0.1

600

—

R_{DS(on)_P}PMOS Switch-ON Resistance

R_{DS(on)_N}NMOS Switch-ON Resistance

—

mΩ

μA

—

I_LEAK

V_FB

I_FB

SW Leakage Current

Feedback Voltage

V_EN=0V, V_SW=0V to V_DD. Measure I_SW

–

1.0

609

0.1

—

2.5V≤V_DD≤6V

V_FB=5V

591

—

FB Leakage Current

V_IH

EN High Voltage Threshold

EN Low Voltage Threshold

EN Pull Down Resistor

2.5V≤V_DD≤6V

—

1.2

—

V_IL

—

0.4

—

R_{PD_EN}

—

MΩ

Protections

V_UVLO+

V_UVLO−

I_OCP

Input Supply Turn ON Level

UVLO+

UVLO−

—

1.6

—

2.1

—

Input Supply Turn OFF Level

Over Current Protection Threshold

Output Short-Circuit Threshold

OSP Repeat Time

V_OSP

Measure FB

—

300

150

°C

T_OSP

T_SHD

Thermal Shutdown Threshold

Thermal Shutdown Hysteresis

OTP

T_HYS

—

Others

R_PG

PG Detect Threshold

PG Sink Capability

Soft Start Time

Measure FB, V_{FB_PG}/V_FB

—

V_FB=0.5V. Source 1mA to PG,

measure PG

V_PG(OL)

Tss

0.4

—

0.7

—

V_{FB_OVP}Prevent Output Overshoot

640

660

680

Rev. 1.00

August 26, 2023

1 2 345 6 7...20

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