SC4502 查看數據表（PDF） - Semtech Corporation

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产品描述 (功能)

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SC4502

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

Semtech Corporation 

SC4502/SC4502H

POWER MANAGEMENT

Typical Characteristics

Feedback Voltage vs Temperature

1.3

ROSC vs Switching Frequency

100

1.25

VIN = 2V

25ºC

10

1.2

1.15

-50 -25

0 25 50 75 100 125

Temperature (ºC)

1

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Frequency (MHz)

Switching Frequency

vs Temperature

1.7

ROSC = 7.68KΩ

1.6

VIN = 12V

1.5

VIN = 2V

1.4

1.3

-50 -25

0 25 50 75 100 125

Temperature (ºC)

Switch Saturation Voltage

vs Switch Current

500

SC4502

400

300

85ºC

200

25ºC

100

0

0

0.5

1

1.5

2

Switch Current (A)

Switch Saturation Voltage

vs Switch Current

500

SC4502H

400

300

85ºC

200

25ºC

100

0

0

0.5

1

1.5

2

Switch Current (A)

Minimum VIN vs Temperature

1.5

1.4

1.3

1.2

1.1

1

-50 -25

0 25 50 75 100 125

Temperature (ºC)

VIN Quiescent Current vs Temperature

1.3

Not Switching

1.2

VIN = 16V

1.1

1

VIN = 2V

0.9

0.8

-50 -25

0 25 50 75 100 125

Temperature (ºC)

VIN Current in Shutdown

vs Input Voltage

50

40

-40ºC

30

125ºC

20

10

0

0

VSHDN = 0

5

10

15

20

Input Voltage (V)

Shutdown Threshold

vs Temperature

1.20

VIN = 2V

1.15

1.10

1.05

1.00

-50 -25

0 25 50 75 100 125

Temperature (ºC)

 2005 Semtech Corp.

5

www.semtech.com

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