AAT1157 データシートの表示（PDF） - Analog Technology Inc

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AAT1157

1MHz 1.2A Buck DC/DC Converter

Analog Technology Inc 

AAT1157

1MHz 1.2A Buck DC/DC Converter

Electrical Characteristics1

VIN = VCC = VP = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C.

Symbol

Description

Conditions

VIN

VOUT

∆VOUT/VOUT

∆VOUT(VOUT*∆VIN)

IQ

ISHDN

ILIM

VUVLO

VUVLO(HYS)

VIL

VIH

IIL

IIH

RDS(ON)H

RDS(ON)L

FOSC

TSD

Input Voltage Range

Output Voltage Tolerance

Load Regulation

Line Regulation

Quiescent Supply Current

Shutdown Current

Current Limit

Under-Voltage Lockout

Under-Voltage Lockout Hysteresis

Input Low Voltage

Input High Voltage

Input Low Current

Input High Current

High Side Switch On Resistance

Low Side Switch On Resistance

Oscillator Frequency

Over-Temperature Shutdown

Threshold

VIN = VOUT + 0.2 to 5.5V,

IOUT = 0 to 1.2A

VIN = 4.2V, ILOAD = 0 to 1.2A

VIN =2.7 to 5.5V

No Load

VEN = 0V, VIN = 5.5V

TA = 25°C

VIN Rising, VEN = VCC

VIN Falling, VEN = VCC

VIN = VFB = 5.5V

VIN = VFB = 0V

TA = 25°C

TA = 25°C

TA = 25°C

THYS

Over-Temperature Shutdown

Hysteresis

Min Typ Max Units

2.7

5.5

V

-4

+4

%

±2.5

%

±0.1

%/V

160 300 µA

1.0 µA

1.7

A

2.5

V

1.2

250

mV

0.6

V

1.4

V

1.0 µA

1.0 µA

110 150 mΩ

100 150 mΩ

750 1000 1250 kHz

140

°C

15

°C

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.

4

1157.2005.11.1.4

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