rn5rl33a RICOH Co.,Ltd., rn5rl33a Datasheet - Page 16

• Manufacturer Part Number: rn5rl33a
• Description: Voltage Regulator
• Manufacturer: RICOH Co.,Ltd.

16
Rx5RL
APPLICATION CIRCUITS
• VOLTAGE BOOST CIRCUIT
• DUAL POWER SUPPLY CIRCUIT
GND
TYPICAL APPLICATION
V
IN
GND
V
V
IN
IN
C1
C1
C2
V
+
V
+
V
V
+
IN
IN
IN
IN
IC1
IC2
Rx5RL20A
Rx5RL30A
SERIES
SERIES
Rx5RL
Rx5RL
GND
GND
GND
GND
I
SS
V
V
C3
V
C1
V
OUT
OUT
OUT
OUT
+
+
+
+
C2
C2
I
SS
R1
R2
D
R
GND
V
OUT
GND
V
V
OUT
OUT
5V
3V
V
1
2
OUT
without using Capacitors C1 and C2. However, when the
wire connected to Vin is long, use Capacitor C1. Output
noise can be reduced by using Capacitor C2.
0.1µF to 2.0µF between Input/Output Pins and GND Pin
with minimum wiring.
ing formula :
small that the resistances of R1 and R2 can be set as
large as several hundreds kΩ and therefore the sup-
ply current of “Voltage Boost Circuit” itself can be
reduced.
a constant voltage, the supply current of “Voltage
Boost Circuit” is not substantially affected by the
input voltage.
ply circuit can be constructed by using two Rx5RL
Series.
circuit with an output of 3V and an output of 5V.
When the minimum output current of IC2 is larger
than I
a protection diode for the case where V
larger than V
*
In Rx5RL Series, a constant voltage can be obtained
Insert Capacitors C1 and C2 with the capacitance of
The output voltage can be obtained by the follow-
Since the quiescent current of Rx5RE Series is so
Furthermore, since Rx5RL Series are operated by
As shown in the circuit diagram, a dual power sup-
This circuit diagram shows a dual power supply
1) Vreg : Set Output Voltage of Rx5RL Series.
V
SS
OUT
of IC1, Resistor R is unnecessary. Diode D is
=Vreg · (1+R2/R1) + I
OUT
*
1
1.
SS
R · 2
OUT
2 becomes