RN5RZ
OPERATION
RN5RZ
××
A
RN5RZ
××
B
V
DD
2
–
Error Amp.
Vref
Current Limit
CE 5
R2
+
R1
3 V
OUT
V
DD
2
–
Error Amp.
Vref
Current Limit
R2
+
R1
3 V
OUT
1 GND
CE 5
1 GND
In these ICs, Output Voltage V
OUT
is detected by Feed-back Registers R1, R2, and the detected Output Voltage is
compared with a reference voltage by an Error Amplifier, so that a constant voltage is output.
A current limit circuit working for Short Protect and a chip enable circuit for standby function are included.
TEST CIRCUITS
2
V
DD
V
OUT
3
I
OUT
A
C2
V
IN
C1
5
2
V
DD
V
OUT
3
RN5RZ SERIES
V
IN
C1
5
CE
GND
1
C1 : 1µF
C2 : 10µF
RN5RZ SERIES
CE
GND
1
C1 : 1µF
C2 : 10µF
C2
Fig.1 Standard Test Circuit
Fig.2 Supply Current Test Circuit
2
V
DD
V
OUT
3
I
OUT
RN5RZ SERIES
P
.G.
V
IN
5
CE
GND
1
C1 : 10µF
C1
Fig.3 Line Transient Response Test Circuit
6
RICOH [ RICOH ELECTRONICS DEVICES DIVISION ]
