SC191 datasheet(9/13 Pages) SEMTECH

Part #	SC191

Description	Low Supply Ripple Synchronous Buck Conversion Regulator

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Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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POWER MANAGEMENT

9

SC191

0

10

20

30

40

50

60

70

80

90

100

0.0100

0.1000

1.0000

0

10

20

30

40

50

60

70

80

90

100

0.0100

0.1000

1.0000

1.19

1.195

1.2

1.205

1.21

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

1.19

1.195

1.2

1.205

1.21

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

Efﬁciency vs. Load Current (FELDO Active)

Efﬁciency vs. Load Current (FELDO Bypassed)

Line Regulation (FELDO Bypassed)

Load Regulation

V

IN (V)

I

OUT=1mA

I

OUT (A)

V

IN=3V

V

IN=3.6V

V

IN=4.2V

Line Regulation (FELDO Active)

I

OUT (A)

Switching Frequency vs. Temperature

V

IN=3V

V

IN=3.6V

V

IN=4.2V

I

OUT=150mA

I

OUT=330mA

V

IN (V)

I

OUT=1mA

I

OUT=150mA

I

OUT=330mA

1.195

1.2

1.205

1.21

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

I

OUT (A)

V

IN=3V

V

IN=3.6V

V

IN=4.2V

0.95

0.96

0.97

0.98

0.99

1

1.01

-60

-40

-20

0

20

40

60

80

100

120

140

T

J (°C)

V

IN=3.6V

Typical Characteristics

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SC191 Datasheet(PDF) 9 Page - Semtech Corporation

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