SC4502 데이터 시트보기 (PDF) - Semtech Corporation

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SC4502

1.4Amp, 2MHz Step-Up Switching Regulator with Soft-Start

Semtech Corporation 

SC4502/SC4502H

POWER MANAGEMENT

Typical Characteristics

VIN Current vs SHDN Pin Voltage

1.2

VIN = 2V

1

125ºC

0.8

0.6

0.4

0.2

0

0

-40ºC

125ºC

-40ºC

0.5

1

1.5

SHDN Voltage (V)

VIN Current vs SHDN Pin Voltage

0.1

VIN = 2V

0.08

25ºC

0.06

0.04

0.02

0

0

0.2 0.4 0.6 0.8

1

1.2

SHDN Voltage (V)

Shutdown Pin Current

vs Temperature

-3

VSHDN = 1.25V

-4

VIN = 2V

-5

VIN = 12V

-6

-50 -25

0 25 50 75 100 125

Temperature (ºC)

Soft-Start Charging Current

vs Temperature

2

VSS = 0.3V

1.8

1.6

1.4

1.2

1

-50 -25

0 25 50 75 100 125

Temperature (ºC)

Transconductance vs Temperature

80

VIN = 2V

70

60

50

40

30

-50 -25

0 25 50 75 100 125

Temperature (ºC)

Switch Current Limit

vs Temperature

2.4

2.2

2

1.8

1.6

-50 -25

0

25 50 75 100

Temperature (ºC)

 2005 Semtech Corp.

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