R1232D Datasheet, PDF (7/24 Pages) RICOH electronics devices division – PWM STEP-DOWN DC/DC CONVERTER WITH SYNCHRONOUS RECTIFIER

TEST CIRCUIT
PGND LX
A
VIN AGND
VDD TEST
CE
VFB
R1232D
Test Circuit for Input Current and Leakage Current
PGND LX
VIN AGND
VDD TEST
A
CE
VFB
PGND LX
V
VIN AGND
VDD TEST
CE
VFB
Test Circuit for Supply Current and Standby Current
PGND LX
VIN AGND
VDD TEST
CE
VFB
Test Circuit for ON resistance of LX
OSCILLOSCOPE
Input Voltage, Output Voltage, Frequency, Lx Current Limit,
Protection Delay Time, UVLO Voltage Test Circuit
PGND LX
VIN AGND
OSCILLOSCOPE
VDD TEST
CE
VFB
Soft Start Time Test Circuit
The bypass capacitor between power supply and GND is a ceramic capacitor 10µF.
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