Datasheet > AAT1157

AAT1157

更新时间： 2022-01-15 02:20:54

品牌	Logo	应用领域
ANALOGICTECH		转换器
页数	文件大小	规格书
14页	395K
描述
1MHz 1.2A Buck DC/DC Converter

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AAT1157 数据手册

AAT1157

1MHz 1.2A Buck DC/DC Converter

Electrical Characteristics¹

V_IN= V_CC= V_P= 5V, T_A= -40°C to +85°C, unless otherwise noted. Typical values are at T_A= 25°C.

Symbol

Description

Conditions

Min Typ Max Units

V_IN

Input Voltage Range

2.7

5.5

_IN= V_OUT+ 0.2 to 5.5V,

V_OUT

Output Voltage Tolerance

Load Regulation

-4

I_OUT= 0 to 1.2A

V_IN= 4.2V, I_LOAD= 0 to 1.2A

V_IN=2.7 to 5.5V

No Load

∆V_OUT/V_OUT

∆V_OUT(V_OUT*∆V_IN) Line Regulation

±2.5

±0.1

160

%/V

µA

I_Q

Quiescent Supply Current

300

1.0

I_SHDN

I_LIM

Shutdown Current

Current Limit

V_EN= 0V, V_IN= 5.5V

T_A= 25°C

1.7

1.2

V_INRising, V_EN= V_CC

2.5

0.6

V_UVLO

Under-Voltage Lockout

V_INFalling, V_EN= V_CC

V_UVLO(HYS)

V_IL

Under-Voltage Lockout Hysteresis

Input Low Voltage

250

V_IH

Input High Voltage

1.4

I_IL

Input Low Current

V_IN= V_FB= 5.5V

V_IN= V_FB= 0V

T_A= 25°C

1.0

µA

mΩ

kHz

I_IH

Input High Current

R_DS(ON)H

R_DS(ON)L

F_OSC

High Side Switch On Resistance

Low Side Switch On Resistance

Oscillator Frequency

Over-Temperature Shutdown

Threshold

110

100

150

T_A= 25°C

750

1000 1250

T_SD

140

°C

Over-Temperature Shutdown

Hysteresis

T_HYS

1. The AAT1157 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured

by design, characterization, and correlation with statistical process controls.

1157.2005.11.1.4

1 2 345 6 7...14

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