LOW DR OPOUT
VOLTAGE REGULATOR
RN5RT SERIES
NO.EA-038-0006
APPLICATION MANUAL
LOW DROPOUT
VOLTAGE REGULATOR
1
RN5RT SERIES
OUTLINE
The RN5RT Series are voltage regulator ICs with high output voltage accuracy and low supply current developed
through the use of a CMOS process. Each of these voltage regulator ICs consists of a voltage reference unit, an
error amplifier, output voltage setting resistors and a current limit circuit.
The output voltage of these ICs is fixed with high accuracy.
The built-in Driver Transistor of low ON Resistance permits developing of low dropout CMOS type regulator as
RN5RT Series.
Even if VOUT is shorted to GND, the current limit circuit protects the ICs from destruction.
Furthermore, these ICs have a chip enable function, so that the supply current on standby can be minimized.
Since the package for these ICs is the SOT-23-5 (Mini-mold) package, high density mounting of the ICs on
boards is possible.
• Ultra-Low Supply Current...........................................TYP. 4µA (except ICEL)
• Standby Mode..............................................................TYP. 0.1µA
• Low Dropout Voltage ..................................................TYP. 0.3V (IOUT=60mA, RN5RT30A)
• Low Temperature-Drift Coefficient of Output Voltage........TYP. ±100ppm/˚C
• Excellent Line Regulation...........................................TYP. 0.15%/V
• Output Voltage .............................................................Stepwise setting with a step of 0.1V in the range of 2.0V to 6.0V
is possible (refer to Selection Guide).
• High Accuracy Output Voltage ..................................±2.0%
• Built-in Current Limit Circuits ...................................TYP. 30mA
• Small Package..............................................................SOT-23-5 (Mini-mold)
FEATURES
APPLICATIONS
• Power source for battery-powered equipment.
• Power source for cellular phones, cameras, VCRs, camcorders, hand-held audio instruments and hand-held com-
munication equipment.
• Power source for domestic appliances.
SELECTION GUIDE
RN5RT
2
BLOCK DIAGRAM
2
5
3
1
Vref
VOUT
GND
VDD
+
CE
–
Current Limit
RN5RT××××–× ←Part Number
↑↑↑↑
abcd
}
The output voltage, the packing type, and the taping type for the ICs can be selected at the user's request.
These selections can be made by designating the part number as shown below:
Code Contents
aSetting Output Voltage (VOUT) :
Stepwise setting with a step of 0.1V in the range of 2.0V to 6.0V is possible.
bA
Designation of Packing Type :
c A : Taping
C : Antistatic bag (for Samples only)
dDesignation of Taping Type :
Ex. TR, TL (refer to Taping Specifications ; TR type is the standard direction.)
RN5RT
3
PIN CONFIGURATION
PIN DESCRIPTION
• SOT-23-5
12
3
54
(mark side)
Pin No. Symbol Description
1 GND Ground Pin
2VDD Input Pin
3VOUT Output Pin
4 NC No Connection
5 CE Chip Enable Pin
ABSOLUTE MAXIMUM RATINGS
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are threshold limit values that must not be exceeded even for an instant under
any conditions. Moreover, such values for any two items must not be reached simultaneously. Operation
above these absolute maximum ratings may cause degradation or permanent damage to the device. These
are stress ratings only and do not necessarily imply functional operation below these limits.
Symbol Item Ratings Unit
VIN Input Voltage 9 V
VCE Input Voltage (CE Pin) –0.3 to VIN +0.3 V
VOUT Output Voltage –0.3 to VIN +0.3 V
IOUT Output Current 150 mA
PDPower Dissipation 150 mW
Topt Operating Temperature –40 to +85 ˚C
Tstg Storage Temperature –55 to +125 ˚C
Tsolder Lead Temperature (Soldering) 260˚C, 10s
RN5RT
4
ELECTRICAL CHARACTERISTICS
Topt=25˚C
Symbol Item Conditions MIN. TYP. MAX. Unit
VOUT Output Voltage VIN=4.0V, IOUT=10mA 2.940 3.000 3.060 V
IOUT Output Current VIN=4.0V 40 60 mA
∆VOUT Load Regulation VIN=4.0V 40 80 mV
∆IOUT 1mA≤IOUT≤60mA
VDIF Dropout Voltage IOUT=60mA 0.3 0.5 V
ISS Supply Current VIN=4.0V (except ICEL) 4.0 10 µA
Istandby Supply Current (Standby) VIN=VCE=4.0V 0.1 1.0 µA
∆VOUT Line Regulation IOUT=30mA 0 0.15 0.3 %/V
∆VIN VOUT+0.5V≤VIN≤8V
VIN Input Voltage 8V
∆VOUT Output Voltage IOUT=10mA ±100 ppm/˚C
∆Topt Temperature Coefficient –40˚C≤Topt≤85˚C
Ilim Short Current Limit VOUT=0V 30 mA
VCEH CE Input Voltage “H” 1.5 V
VCEL CE Input Voltage “L” 0.25 V
ICEH CE Input Current “H” VCE=VIN 0 0.1 µA
ICEL CE Input Current “L” VCE=0V –4.0 –2.0 –0.1 µA
• RN5RT30A
RN5RT
5
• RN5RT40A Topt=25˚C
Symbol Item Conditions MIN. TYP. MAX. Unit
VOUT Output Voltage VIN=5.0V, IOUT=10mA 3.920 4.000 4.080 V
IOUT Output Current VIN=5.0V 50 80 mA
∆VOUT Load Regulation VIN=5.0V 40 80 mV
∆IOUT 1mA≤IOUT≤80mA
VDIF Dropout Voltage IOUT=80mA 0.3 0.5 V
ISS Supply Current VIN=5.0V (expect ICEL)410µA
Istandby Supply Current (Standby) VIN=VCE=5.0V 0.1 1.0 µA
∆VOUT Line Regulation IOUT=30mA 0.15 0.3 %/V
∆VIN VOUT+0.5V≤VIN≤8V
VIN Input Voltage 8V
∆VOUT Output Voltage IOUT=10mA ±100 ppm/˚C
∆Topt Temperature Coefficient –40˚C≤Topt≤85˚C
Ilim Short Current Limit VOUT=0V 30 mA
VCEH CE Input Voltage “H” 1.5 V
VCEL CE Input Voltage “L” 0.25 V
ICEH CE Input Current “H” VCE=VIN 0 0.1 µA
ICEL CE Input Current “L” VCE=0V –4.0 –2.0 –0.1 µA
RN5RT
6
• RN5RT50A Topt=25˚C
Symbol Item Conditions MIN. TYP. MAX. Unit
VOUT Output Voltage VIN=6.0V, IOUT=10mA 4.900 5.000 5.100 V
IOUT Output Current VIN=6.0V 65 100 mA
∆VOUT Load Regulation VIN=6.0V 40 80 mV
∆IOUT 1mA≤IOUT≤100mA
VDIF Dropout Voltage IOUT=100mA 0.3 0.5 V
ISS Supply Current VIN=6.0V (except ICEL)410µA
Istandby Supply Current (Standby) VIN=VCE=6.0V 0.1 1.0 µA
∆VOUT Line Regulation IOUT=30mA 0.15 0.3 %/V
∆VIN VOUT+0.5V≤VIN≤8V
VIN Input Voltage 8V
∆VOUT Output Voltage IOUT=10mA ±100 ppm/˚C
∆Topt Temperature Coefficient –40˚C≤Topt≤85˚C
Ilim Short Current Limit VOUT=0V 30 mA
VCEH CE Input Voltage “H” 1.5 V
VCEL CE Input Voltage “L” 0.25 V
ICEH CE Input Current “H” VCE=VIN 0 0.1 µA
ICEL CE Input Current “L” VCE=0V –4.0 –2.0 –0.1 µA
RN5RT
7
RN5RT
8
ELECTRICAL CHARACTERISTICS BY OUTPUT VOLTAGE
Output Voltage Output Current Load Regulation Dropout Voltage Supply Current
Part Number VOUT (V) IOUT (mA) ∆VOUT/∆IOUT (mA) VDIF (V) ISS (µA)
Conditions
MIN. TYP. MAX.
Conditions
MIN. TYP.
Conditions
TYP. MAX.
Conditions
TYP. MAX
Conditions
TYP. MAX.
RN5RT20A 1.960 2.000 2.040
RN5RT21A 2.058 2.100 2.142
RN5RT22A 2.156 2.200 2.244
RN5RT23A 2.254 2.300 2.346
RN5RT24A 2.352 2.400 2.448
RN5RT25A 2.450 2.500 2.550
RN5RT26A 2.548 2.600 2.652
RN5RT27A 2.646 2.700 2.754
RN5RT28A 2.744 2.800 2.856
RN5RT29A 2.842 2.900 2.958
RN5RT30A 2.940 3.000 3.060
RN5RT31A 3.038 3.100 3.162
RN5RT32A 3.136 3.200 3.264
RN5RT33A 3.234 3.300 3.366
RN5RT34A 3.332 3.400 3.468
RN5RT35A 3.430 3.500 3.570
RN5RT36A 3.528 3.600 3.672
RN5RT37A 3.626 3.700 3.774
RN5RT38A 3.724 3.800 3.876
RN5RT39A 3.822 3.900 3.978 4.0 10
RN5RT40A 3.920 4.000 4.080
RN5RT41A 4.018 4.100 4.182
RN5RT42A 4.116 4.200 4.284
RN5RT43A 4.214 4.300 4.386
RN5RT44A 4.312 4.400 4.488
RN5RT45A 4.410 4.500 4.590
RN5RT46A 4.508 4.600 4.692
RN5RT47A 4.606 4.700 4.794
RN5RT48A 4.704 4.800 4.896
RN5RT49A 4.802 4.900 4.998
RN5RT50A 4.900 5.000 5.100
RN5RT51A 4.998 5.100 5.202
RN5RT52A 5.096 5.200 5.304
RN5RT53A 5.194 5.300 5.406
RN5RT54A 5.292 5.400 5.508
RN5RT55A 5.390 5.500 5.610
RN5RT56A 5.488 5.600 5.712
RN5RT57A 5.586 5.700 5.814
RN5RT58A 5.684 5.800 5.916
RN5RT59A 5.782 5.900 6.018
RN5RT60A 5.880 6.000 6.120
25 40
40 60
50 80
65 100
VIN–VOUT
=1.0V
1mA≤
IOUT
≤40mA
VIN–VOUT
=1.0V
1mA≤
IOUT
≤60mA
VIN–VOUT
=1.0V
1mA≤
IOUT
≤80mA
VIN–VOUT
=1.0V
1mA≤
IOUT
≤100mA
40 80 0.3 0.5
IOUT
=40mA
IOUT
=60mA
IOUT
=80mA
IOUT
=100mA
VIN–VOUT
=1.0V
(
expect
)
I
CEL
V
IN
–V
OUT
=1.0V
IOUT
=10mA
VTN–VOUT
=1.0V
RN5RT
9
Topt=25˚C
Supply Current Line Regulation
Input
Output Voltage
Short
CE Input Voltage
CE Input Current
(Standby)
Voltage
Temperature Coefficient
Current Limit
“H” “L” “H” “L”
Istandby (µA) ∆VOUT/∆VIN (%/V)
V
IN
(V)
∆V
OUT
/∆T (ppm/˚C)
Ilim (mA)
V
CEH
(V) V
CEL
(V)
ICEH (µA) ICEL (µA)
Conditions
TYP. MAX.
Conditions
TYP. MAX. MAX.
Conditions
TYP.
Conditions
TYP. MIN. MAX.
Conditions
TYP. MAX.
Conditions
MIN. TYP. MAX.
I
OUT
=I
OUT
=
30mA 10mA
0.1 1.0
V
OUT
+
0.15 0.3 8
–40˚C
±100
VOUT 30 1.5 0.25
V
CE
=
0 0.1
V
CE
=
–4.0 –2.0 –0.1
0.5V
≤Topt
=0V
V
IN
0V
≤VIN
≤85˚C
≤8V
VIN–VOUT
=1.0V
RN5RT
10
OPERATION
2
5
3
1
Vref
VOUT
GND
VDD
+
CE
–
Current Limit
R1
R2
In these ICs, Output Voltage VOUT is detected by Feed-back Registers R1, R2, and the detected Output Voltage is
compared with a reference voltage by 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
IOUT
VDD VOUT
1
CE
3
C2C1 5
2
GND
VIN
C1, C2=1µF
VDD VOUT
1
CE
3
C1
5
2
GND
C1=1µF
ISS→
A
Fig.1 Standard Test Circuit Fig.2 Supply Current Test Circuit
IOUT
VDD VOUT
1
CE
3
C1
5
2
GND
VIN
C1=1µF
P.G.
Fig.3 Line Transient Response Test Circuit
RN5RT
11
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current
VIN=4.0V
VIN=8.0V VIN=5.0V
VIN=3.3V
RN5RT30A Topt=25˚C
0 100 200 300 400
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
Output Voltage VOUT(V)
Output Current IOUT(mA)
RN5RT40A Topt=25˚C
0 100 200 300 400 500
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
Output Voltage VOUT(V)
Output Current IOUT(mA)
VIN=5.0V
VIN=4.3V
VIN=6.0VVIN=8.0V
RN5RT50A Topt=25˚C
0 100 200 300 400 500 600
0.0
1.0
2.0
3.0
4.0
5.0
6.0
Output Voltage VOUT(V)
Output Current IOUT(mA)
VIN=6.0V
VIN=5.3V
VIN=7.0V
VIN=8.0V
2) Output Voltage vs. Input Voltage
RN5RT30A Topt=25˚C
1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
Output Voltage VOUT(V)
Input Voltage VIN(V)
IOUT=1mA
IOUT=10mA
IOUT=60mA
RN5RT30A Topt=25˚C
3.0 4.0 5.0 6.0 7.0 8.0
2.95
2.96
2.97
2.98
2.99
3.00
3.01
3.02
3.03
3.04
3.05
Output Voltage VOUT(V)
Input Voltage VIN(V)
IOUT=10µA
IOUT=1mA
IOUT=10mA
RN5RT
12
RN5RT40A Topt=25˚C
2.0 3.0 4.0 5.0 6.0 7.0 8.0
2.4
2.6
2.8
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Output Voltage VOUT(V)
Input Voltage VIN(V)
IOUT=1mA
IOUT=10mA
IOUT=80mA
RN5RT40A Topt=25˚C
4.0 5.0 6.0 7.0 8.0
3.95
3.96
3.97
3.98
3.99
4.00
4.01
4.02
4.03
4.04
4.05
Output Voltage VOUT(V)
Input Voltage VIN(V)
IOUT=10µA
IOUT=1mA
IOUT=10mA
RN5RT50A Topt=25˚C
3.0 4.0 5.0 6.0 7.0 8.0
3.6
3.8
4.0
4.2
4.4
4.6
4.8
5.0
5.2
Output Voltage VOUT(V)
Input Voltage VIN(V)
IOUT=1mA
IOUT=10mA
IOUT=100mA
RN5RT50A Topt=25˚C
5.0 6.0 7.0 8.0
4.95
4.96
4.97
4.98
4.99
5.00
5.01
5.02
5.03
5.04
5.05
Output Voltage VOUT(V)
Input Voltage VIN(V)
IOUT=10µA
IOUT=1mA
IOUT=10mA
3) Dropout Voltage vs. Output Current
RN5RT30A
0 1020304050607080
0.0
0.1
0.2
0.3
0.4
0.5
Dropout Voltage VDIF(V)
Output Current IOUT(mA)
Topt=85˚C 25˚C
–40˚C
RN5RT40A
0 20406080100
0.0
0.1
0.2
0.3
0.4
0.5
Dropout Voltage VDIF(V)
Output Current IOUT(mA)
Topt=85˚C 25˚C
–40˚C
RN5RT
13
RN5RT50A
0 20406080100120
0.0
0.1
0.2
0.3
0.4
0.5
Dropout Voltage VDIF(V)
Output Current IOUT(mA)
Topt=85˚C 25˚C
–40˚C
4) Output Voltage vs. Temperature
RN5RT30A VIN=4V
IOUT=10mA
–50 –25 0 25 50 75 100
2.9
3.0
3.1
Output Voltage VOUT(V)
Temperature Topt(˚C)
RN5RT40A VIN=5V
IOUT=10mA
–50 –25 0 25 50 75 100
3.9
4.0
4.1
Output Voltage VOUT(V)
Temperature Topt(˚C)
RN5RT50A VIN=6V
IOUT=10mA
–50 –25 0 25 50 75 100
4.9
5.0
5.1
Output Voltage VOUT(V)
Temperature Topt(˚C)
RN5RT
14
5) Supply Current vs. Input Voltage
RN5RT30A Topt=25˚C
3.0 4.0 5.0 6.0 7.0 8.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Supply Current ISS(µA)
Input Voltage VIN(V)
RN5RT40A Topt=25˚C
4.0 5.0 6.0 7.0 8.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Supply Current ISS(µA)
Input Voltage VIN(V)
RN5RT50A Topt=25˚C
5.0 6.0 7.0 8.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Supply Current ISS(µA)
Input Voltage VIN(V)
6) Supply Current vs. Temperature
RN5RT30A VIN=8V
–50 –25 0 25 50 75 100
3.0
3.2
3.4
3.6
3.8
4.0
Supply Current ISS(µA)
Temperature Topt(˚C)
RN5RT40A VIN=8V
–50 –25 0 25 50 75 100
3.0
3.2
3.4
3.6
3.8
4.0
Supply Current ISS(µA)
Temperature Topt(˚C)
RN5RT
15
RN5RT50A VIN=8V
–50 –25 0 25 50 75 100
3.0
3.2
3.4
3.6
3.8
4.0
Supply Current ISS(µA)
Temperature Topt(˚C)
7) Dropout Voltage vs. Set Output Voltage
RN5RT Series Topt=25˚C
0123456
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
Dropout Voltage VDIF(V)
Set Output Voltage Vreg(V)
IOUT=50mA
IOUT=10mA
IOUT=1mA
8) Line Transient Response
RN5RT30A Topt=25˚C
COUT=1µF
IOUT=1mA
0.0 0.4 0.8 1.2 1.6 2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage VIN/
Output Voltage VOUT (V)
Time t (ms)
Input Voltage
Output Voltage
RN5RT30A Topt=25˚C
COUT=1µF
IOUT=30mA
0 0.4 0.8 1.2 1.6 2
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Input Voltage VIN/
Output Voltage VOUT (V)
Time t (ms)
Input Voltage
Output Voltage
RN5RT
16
TYPICAL APPLICATION
IOUT
VDD VOUT
1
CE
3
C2C1 5
2
GND
VIN
In the RN5RT Series, a constant voltage can be obtained without using Capacitor C1 and C2. However, when the
wire connected to VIN is long, use Capacitor C1. Transient noise of output voltage occurred due to load deviation can
be reduced by using Capacitor C2.
Insert Capacitors C1 and C2 with the capacitance of 0.1µF to 2.0µF between Input/Output Pins and GND Pin
with minimum wiring.
