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R1230D251C-TR Datasheet(PDF) 7 Page - RICOH electronics devices division

Part # R1230D251C-TR
Description  PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
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Manufacturer  RICOH [RICOH electronics devices division]
Direct Link  http://www.ricoh.com
Logo RICOH - RICOH electronics devices division

R1230D251C-TR Datasheet(HTML) 7 Page - RICOH electronics devices division

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Rev. 1.12
- 7 -
s
s
s
s TEST CIRCUITS
VIN
Lx
VDD
CE
VOUT
AGND
PGND MODE
A
OSCILLOSCOPE
VIN
Lx
VDD
CE
VOUT
AGND
PGND MODE
Test Circuit for Input Current and Leakage Current
Test Circuit for Input Voltage and UVLO voltage
VIN
Lx
VDD
CE
V
OUT
AGND
PGND MODE
10uF
L
V OUT
OSCILLOSCOPE
Test Circuit for Output Voltage, Oscillator Frequency, Soft-Starting Time
VIN
Lx
VDD
CE
VOUT
AGND
PGND MODE
A
V
IN
Lx
VDD
CE
VOUT
AGND
PGND MODE
A
OSCILLOSCOPE
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 10
µF.


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