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R1234D251A Datasheet(PDF) 9 Page - RICOH electronics devices division

Part # R1234D251A
Description  PWM/VFM Step-Down DC/DC CONVERTER with Synchronous Rectifier
Download  26 Pages
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Manufacturer  RICOH [RICOH electronics devices division]
Direct Link  http://www.ricoh.com
Logo RICOH - RICOH electronics devices division

R1234D251A Datasheet(HTML) 9 Page - RICOH electronics devices division

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R1234D
9
TEST CIRCUITS
A
Lx
VIN
CE
VOUT
MODE
VDD
AGND
PGND
1
3
7
2
8
4
5
6
R1234D
Series
OSCILLOSCOPE
Lx
VIN
CE
VOUT
MODE
VDD
AGND
PGND
1
3
7
2
8
4
5
6
R1234D
Series
Test Circuit for Input Current and Leakage Current
Test Circuit for Input Voltage and UVLO voltage
OSCILLOSCOPE
L
VOUT
10
µF
Lx
VIN
CE
VOUT
MODE
VDD
AGND
PGND
1
3
7
2
8
4
5
6
R1234D
Series
Test Circuit for Output Voltage, Oscillator Frequency, Soft-Starting Time
A
Lx
VIN
CE
VOUT
MODE
VDD
AGND
PGND
1
3
7
2
8
4
5
6
R1234D
Series
OSCILLOSCOPE
A
Lx
VIN
CE
VOUT
MODE
VDD
AGND
PGND
1
3
7
2
8
4
5
6
R1234D
Series
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 a ceramic capacitor 10
µF.


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