Datasheet > AAT1145_08

AAT1145_08

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	846K
描述
1.5A Step-Down Converter

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AAT1145_08 数据手册

PRODUCT DATASHEET

AAT1145

SwitchReg^TM

1.5A 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

Conditions

Min

Typ

Max

Units

V_IN

V_OUT

Input Voltage Range²

Output Voltage Range

2.5

0.6

5.5

V_IN

500

μA

Active Mode

Shutdown Mode

V_FB= 0.5V

V_EN= 0V, V_AIN= 5.5V

V_FB= 0.65V

300

0.1

Input DC Supply

Current

I_Q

I_FB

Feedback Input Bias Current

T_A= 25°C

T_A= 0°C ≤ T_A≤ 85°C

T_A= -40°C ≤ T_A≤ 85°C

0.5880 0.6000 0.6120

0.5865 0.6000 0.6135

0.5850 0.6000 0.6150

V_FB

Regulated Feedback Voltage³

ΔV_LINEREG

ΔV_IN

ΔV_LOADREG

ΔI_OUT

V_FB

Line Regulation

V_IN= 2.5V to 5.5V, I_OUT= 10mA

I_OUT= 10mA to 1500mA

0.10

0.20

%/V

%/A

Load Regulation

Output Voltage Accuracy

V_IN= 2.5 to 4.2V, I_OUT= 10 to 1500mA

-3

V_OUT

F_OSC

T_S

Oscillator Frequency

Startup Time

V_FB= 0.6V

From Enable to Output Regulation

0.96

1.2

1.3

1.44

MHz

Over-Temperature Shutdown

Threshold

Over-Temperature Shutdown

Hysteresis

Peak Switch Current

P-CH MOSFET

N-CH MOSFET

Enable Threshold Low

Enable Threshold High

Input Low Current

T_SD

170

°C

T_HYS

I_LIM

°C

2.5

135

V_IN= 3.6V

200

150

0.3

R_DS(ON)

mΩ

V_EN(L)

V_EN(H)

I_EN

μA

1.5

-1.0

V_IN= V_EN= 5.5V

1.0

1. The AAT1145 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-

tion with statistical process controls.

2. V_INshould be not less than V_OUT+ V_DROPOUT, where V_DROPOUT= I_OUT· (R_DS(ON)PMOS+ ESR_INDUCTOR), typically V_DROPOUT= 0.3V.

3. The regulated feedback voltage is tested in an internal test mode that connects V_FBto the output of the error amplifier.

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

1145.2008.01.1.2

1 2 345 6 7...17

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