SC2441ITSTRT View Datasheet(PDF) - Semtech Corporation

Part Name

Description

MFG CO.

SC2441ITSTRT

Very Low Input Voltage 2-Phase Synchronous Step-down Controllers with Step-up Converter

Semtech Corporation 

POWER MANAGEMENT

Typical Performance Characteristics

SC2441

FB1 AND FB2 VOLTAGES vs TEMPERATURE

0.5

0.498

VIN = 2V

VCC = 5V

0.496

0.494

0.492

0.49

-50 -25

0

25

50

75

100

TEMPERATURE (ºC)

FB3 VOLTAGE vs TEMPERATURE

1.3

1.28

1.26

1.24

1.22

VIN START AND UVLO THRESHOLD

VOLTAGES vs TEMPERATURE

2

1.9

1.8

VIN START

1.7

1.6

VIN UVLO

1.2

-50 -25

0

25

50

75 100

TEMPERATURE (ºC)

1.5

-50

-25

0

25

50

75

100

TEMPERATURE (ºC)

VCC START AND UVLO THRESHOLD

VOLTAGES vs TEMPERATURE

5

4.8

VCC START

4.6

VCC UVLO

4.4

4.2

4

-50

-25

0

25

50

75

100

TEMPERATURE (ºC)

STEP-DOWN CHANNEL SWITCHING

FREQUENCY vs TEMPERATURE

520

515

ROSC = 51.1KΩ

510

505

500

495

490

485

480

-50

-25

0

25

50

75

100

TEMPERATURE (ºC)

1050

STEP-UP CONVERTER SWITCHING

FREQUENCY vs TEMPERATURE

1040

1030

ROSC = 51.1KΩ

1020

1010

1000

990

980

970

960

950

-50 -25

0

25

50

75

100

TEMPERATURE (ºC)

MAXIMUM DUTY- CYCLE OF STEP-DOWN

CHANNEL vs TEMPERATURE

95

ROSC = 51.1KΩ

93

STEP-UP SWITCH MAXIMUM DUTY- CYCLE

vs TEMPERATURE

90

ROSC = 51.1KΩ

88

STEP-DOWN CONTROLLER CURRENT-LIMIT

THRESHOLD vs TEMPERATURE

50

CS(-) = 0

48

91

86

46

CS(-) = 5V

89

84

44

87

85

-50

-25

0

25

50

75

100

TEMPERATURE (ºC)

82

80

-50

-25

0

25

50

75

100

TEMPERATURE (ºC)

42

VCC = 8V

40

-50

-25

0

25

50

75

100

TEMPERATURE (ºC)

 2005 Semtech Corp.

10

www.semtech.com

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