R1224N Datasheet, PDF (14/42 Pages) RICOH electronics devices division – PWM/VFM step-down DC/DC Converter

R1224N
TEST CIRCUITS
Output Voltage, Oscillator Frequency, CE “H” Input Voltage, CE “L” Input Voltage, Soft-start time
L1
PMOS
Oscilloscope
4
D1
EXT
VIN 5
2 _GND R1224N
C2
3
VOUT
(VFB)
CE 1
V
C1
Supply Current 1
VIN 5 A
2 _GND
3
VOUT
(VFB)
R1224N
CE 1
Standby Current
VIN 5 A
2 _GND
3
VOUT
(VFB)
R1224N
CE 1
EXT “H” Output Current
4 EXT
VIN 5
A
2 _GND R1224N
3
VOUT
(VFB)
CE 1
EXT “L” Output Current
4 EXT
VIN 5
A
2 _GND R1224N
3
VOUT
(VFB)
CE 1
CE “H” Input Current, CE “L” Input Current
VIN 5
2 _GND R1224N
3
VOUT
(VFB)
CE 1 A
Output Delay Time for Protection Circuit
4 EXT
VIN 5
Oscilloscope _{2 GND R1224N}
3
VOUT
(VFB)
CE 1
C2
PMOS: HAT1044M (Hitachi)
SD1 : RB491D (Rohm)
C1 : 47µF (Tantalum Type)
L : CD104-270MC (Sumida, 27µH)
C2 : 47µF (Tantalum Type)
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