Datasheet > AAT1149A

AAT1149A

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
ANALOGICTECH		转换器
页数	文件大小	规格书
17页	1859K
描述
2.2MHz Fast Transient 400mA Step-Down Converter

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AAT1149A 数据手册

PRODUCT DATASHEET

AAT1149A

SwitchReg

2.2MHz FastTransient 400mA Step-Down Converter

Electrical Characteristics¹

V_IN= 3.6V, T_A= -40°C to +85°C, unless otherwise noted. Typical values are T_A= 25°C.

Symbol Description

Step-Down Converter

Conditions

Min

Typ Max Units

V_IN

V_OUT

I_Q

I_SHDN

I_LIM

R_DS(ON)H

R_DS(ON)L

I_LXLEAK

ΔV_Linereg

T_S

Input Voltage

Output Voltage Tolerance

Quiescent Current

2.2

-3.0

5.5

3.0

μA

I_OUT= 0 to 400mA, V_IN= 2.7V to 5.5V

No Load

V_EN= GND

Shutdown Current

1.0

P-Channel Current Limit

High Side Switch On Resistance

Low Side Switch On Resistance

LX Leakage Current

Line Regulation

Start-Up Time

Oscillator Frequency

Over-Temperature Shutdown Threshold

Over-Temperature Shutdown Hysteresis

600

0.40

0.35

V_IN= 5.5V, V_LX= 0 to V_IN, V_EN= GND

V_IN= 2.7V to 5.5V

From Enable to Output Regulation

T_A= 25°C

μA

%/V

μs

MHz

°C

0.1

2.2

140

F_OSC

T_SD

T_HYS

°C

V_EN(L)

V_EN(H)

I_EN

Enable Threshold Low

Enable Threshold High

Input Low Current

0.6

1.0

μA

1.4

-1.0

V_IN= V_OUT= 5.5V

1. The AAT1149A is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and cor-

relation with statistical process controls.

w w w . a n a l o g i c t e c h . c o m

1149A.2008.08.1.1

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