CAT4137 datasheet(3/14 Pages) CATALYST

Part #	CAT4137

Description	CMOS Boost Converter - White LED Driver

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Manufacturer	CATALYST [Catalyst Semiconductor]

Direct Link	http://www.catalyst-semiconductor.com

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CAT4137

3

Doc. No. MD-5012 Rev. B

Characteristics subject to change without notice

TYPICAL CHARACTERISTICS

VIN = 3.6V, CIN = 1.0uF, COUT = 0.22µF, L = 22µH with 3 LEDs at 20mA, TAMB=25ºC, unless otherwise specified.

Quiescent Current vs. VIN (Not Switching)

0

20

40

60

80

100

120

2.5

3.0

3.5

4.0

4.5

5.0

INPUT VOLTAGE [V]

VFB = 0.4V

Quiescent Current vs. VIN (Switching)

0.00

0.25

0.50

0.75

1.00

2.5

3.0

3.5

4.0

4.5

5.0

INPUT VOLTAGE [V]

FB Pin Voltage vs. Supply Voltage

290

295

300

305

310

2.5

3.0

3.5

4.0

4.5

5.0

INPUT VOLTAGE [V]

3 LEDs

FB Pin Voltage vs. Output Current

290

295

300

305

310

0

5

10

15

20

25

30

OUTPUT CURRENT [mA]

3 LEDs

Switching Frequency vs. Supply Voltage

0.90

0.95

1.00

1.05

1.10

2.5

3.0

3.5

4.0

4.5

INPUT VOLTAGE [V]

3 LEDs at 20mA

Switch ON Resistance vs. Input Voltage

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

INPUT VOLTAGE [V]

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