AAT1145 データシートの表示（PDF） - Skyworks Solutions

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AAT1145

1.5A Step-Down Converter

Skyworks Solutions 

Typical Characteristics

DC Regulation

(VOUT = 1.5V; TA = 25°C; L = 2.2µH; COUT = 22µF)

1.545

1.530

1.515

1.500

VIN = 5.5V

VIN = 5V

VIN = 4.2V

VIN = 3.6V

VIN = 2.5V

1.485

1.470

1.455

0

300

600

900

1200

1500

Output Current (mA)

Input Current vs. Input Voltage

(VOUT = 3.3V; L = 2.2µH)

0.50

0.40

0.30

0.20

0.10

0.00

3.6

4.0

4.4

4.8

5.2

Input Voltage (V)

Start-Up Response

(VOUT = 1.8V; VIN = 3.6V; No Load;

CIN = 10µF; COUT = 22µF; L = 2.2µH)

VENABLE

(2V/div)

VOUT

(1V/div)

Time (1ms/div)

DATA SHEET

AAT1145

1.5A Step-Down Converter

DC Regulation

(VOUT = 1.2V; TA = 25°C; L = 2.2µH; COUT = 22µF)

1.236

1.224

1.212

1.200

1.188

1.176

1.164

0

VIN = 5V

VIN = 4.2V

VIN = 3.6V

VIN = 2.5V

300

600

900

1200

1500

Output Current (mA)

Load Transient Response

(VIN = 3.6V; VOUT = 1.8V; COUT = 22µF; CFF = 22pF)

2.2

2.0

1.8

1.6

2.2

1.5A

1.8

1.4

1.0

0.6

0.2A

0.2

-0.2

Time (200µs/div)

Soft Start

(VIN = 3.6V; VOUT = 1.8V; IOUT = 1.5A; CFF = 100pF)

6

4

2

0

-2

1.8

1.3

0.8

0.3

-0.2

Time (400µs/div)

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

6

201984B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 18, 2013

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