SI9121DB-3 datasheet(5/9 Pages) VISHAY

Part #	SI9121DB-3

Description	High-Voltage, Non-Isolated Buck-Boost Converter for ISDN Digital Phones

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Manufacturer	VISHAY [Vishay Siliconix]

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5 / 9 page

Si9121

Vishay Siliconix

Document Number: 71112

S-40708—Rev. C, 19-Apr-04

www.vishay.com

5

TYPICAL CHARACTERISTICS (INTERNALLY REGULATED, 25_C UNLESS NOTED)

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Output Load vs. Efficiency (Si9121DY-3)

No VCC Winding

Output Load vs. Efficiency (Si9121DY-5)

No VCC Winding

Output Load vs. Efficiency (Si9121DY-3)

With VCC Winding

IOUT (mA)

Output Load vs. Efficiency (Si9121DY-5)

With VCC Winding

VNEG = −60 V

VNEG = −10 V

VIN = 48 V

IOUT (mA)

48 VIN

10 VIN

60 VIN

IOUT (mA)

48 VIN

10 VIN

60 VIN

VNEG = −48 V

IOUT (mA)

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VIN = 10 V

VIN = 60 V

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