r1230d RICOH Co.,Ltd., r1230d Datasheet - Page 7

• Manufacturer Part Number: r1230d
• Description: Pwm/vfm Step-down Dc/dc Converter With Synchronous Rectifier
• Manufacturer: RICOH Co.,Ltd.

Test Circuit for Input Current and Leakage Current
Test Circuit for Output Voltage, Oscillator Frequency, Soft-Starting Time
Test Circuit for Supply Current and Standby Current
The bypass capacitor between Power Supply and GND is Ceramic capacitor 10 F.
Rev. 1.12
TEST CIRCUITS
A
AGND
V
V
PGND MODE
DD
IN
AGND
V
PGND MODE
V
DD
IN
V
CE
OUT
AGND
V
PGND MODE
Lx
V
DD
IN
V
OUT
CE
Lx
V
Lx
CE
OUT
OSCILLOSCOPE
L
A
V
10uF
OUT
- 7 -
Test Circuit for Input Voltage and UVLO voltage
Test Circuit for ON resistance of Lx, Limit Voltage, Delay
Time of Protection Circuit
AGND
AGND
V
V
PGND MODE
V
PGND MODE
V
IN
DD
DD
IN
V
V
OUT
OUT
CE
Lx
CE
Lx
OSCILLOSCOPE
OSCILLOSCOPE
A