R1230D341D 데이터 시트보기 (PDF) - RICOH Co.,Ltd.

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R1230D341D

PWM/VFM step-down DC/DC converter with Synchronous Rectifier

RICOH Co.,Ltd. 

s TEST CIRCUITS

VIN

VDD

Lx

CE

AGND VOUT

A

PGND MODE

Test Circuit for Input Current and Leakage Current

VIN

Lx

VDD

CE

VOUT

AGND

PGND MODE

OSCILLOSCOPE

Test Circuit for Input Voltage and UVLO voltage

VIN

Lx

VDD

CE

V

OUT

AGND

PGND MODE

OSCILLOSCOPE

L

V OUT

10uF

Test Circuit for Output Voltage, Oscillator Frequency, Soft-Starting Time

VIN

Lx

A

VDD

CE

AGND VOUT

PGND MODE

V

IN

VDD

Lx

CE

VOUT

AGND

PGND MODE

OSCILLOSCOPE

A

Test Circuit for Supply Current and Standby Current

Test Circuit for ON resistance of Lx, Limit Voltage, Delay

Time of Protection Circuit

The bypass capacitor between Power Supply and GND is Ceramic capacitor 10µF.

Rev. 1.12

-7-

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