R1223N Datasheet, PDF (6/19 Pages) RICOH electronics devices division – PWM/VFM Step-down DC/DC Converter

n TEST CIRCUITS
A)
PMOS
L
E)
543
VIN
1
2
CIN
B)
V
VIN
SD CL
OSCILLOSCOPE
F)
PMOS
543
A1
2
L
A
543
VIN
1
2
CIN
C)
A
543
VIN
1
2
543
V
CIN
VIN
SD CL
1
2
G)
VIN
OSCILLOSCOPE
OSCILLOSCOPE
543
VOUT
1
2
D)
A
VEXT
543
VIN
1
VOUT
2
The typical characteristics were obtained by use of these test circuits.
Test Circuit A : Typical characteristics 1), 2), 3), 4), 5), 6), 7)
Test Circuit B : Typical characteristics 8)
Test Circuit C : Standby Current
Test Circuit D : Typical characteristics 12), 13)
Test Circuit E : CE input current “H” and “L”
Test Circuit F : Typical characteristics 9)
Test Circuit G : Typical characteristics 10), 11)
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Rev. 1.11
-6-