RN5RL55AC-T2 RICOH electronics devices division, RN5RL55AC-T2 Datasheet - Page 17

• Manufacturer Part Number: RN5RL55AC-T2
• Description: VOLTAGE REGULATOR
• Manufacturer: RICOH electronics devices division

16
R 5RL
APPLICATION CIRCUITS
• VOLTAGE BOOST CIRCUIT
• DUAL POWER SUPPLY CIRCUIT
TYPICAL APPLICATION
GND
V
IN
GND
V
V
IN
IN
C1
C2
C1
V
V
+
V
+
IN
+
V
IN
IN
IN
IC1
IC2
R 5RL20A
R 5RL30A
SERIES
R 5RL
SERIES
R 5RL
GND
GND
GND
I
SS
GND
V
C3
V
C1
V
V
OUT
OUT
OUT
OUT
+
+
+
+
C2
I
SS
C2
R1
R2
D
R
GND
V
GND
V
V
OUT
OUT
OUT
3V
5V
1
2
V
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 R 5RL
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 R 5RL 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 R 5RE Series is so
Furthermore, since R 5RL 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 R 5RL 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