LOW DROPOUT
VOLTAGE REGULATOR
RN5RT SERIES
APPLICATION MANUAL
NO.EA-038-0006
LOW DROPOUT
VOLTAGE REGULATOR
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 V
OUT
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.
FEATURES
• Ultra-Low Supply Current ...........................................TYP. 4µA (except I
CEL
)
• Standby Mode ..............................................................TYP. 0.1µA
• Low Dropout Voltage ..................................................TYP. 0.3V (I
OUT
=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)
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.
1
RN5RT
BLOCK DIAGRAM
V
DD
2
3
V
OUT
+
–
Vref
Current Limit
1
5
CE
GND
SELECTION GUIDE
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:
RN5RT
××××
–
×
←
Part Number
}
↑ ↑↑ ↑
a bc d
Code
a
b
Setting Output Voltage (V
OUT
) :
Contents
Stepwise setting with a step of 0.1V in the range of 2.0V to 6.0V is possible.
A
Designation of Packing Type :
c
A : Taping
C : Antistatic bag (for Samples only)
Designation of Taping Type :
Ex. TR, TL (refer to Taping Specifications ; TR type is the standard direction.)
d
2
RN5RT
PIN CONFIGURATION
• SOT-23-5
5
4
(mark side)
1
2
3
PIN DESCRIPTION
Pin No.
Symbol
Description
1
2
3
4
5
GND
V
DD
V
OUT
NC
CE
Ground Pin
Input Pin
Output Pin
No Connection
Chip Enable Pin
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Ratings
Unit
V
IN
V
CE
V
OUT
I
OUT
P
D
Topt
Tstg
Tsolder
Input Voltage
Input Voltage (CE Pin)
Output Voltage
Output Current
Power Dissipation
Operating Temperature
Storage Temperature
Lead Temperature (Soldering)
9
–0.3 to V
IN
+0.3
–0.3 to V
IN
+0.3
150
150
–40 to +85
–55 to +125
260˚C, 10s
ABSOLUTE MAXIMUM RATINGS
V
V
V
mA
mW
˚C
˚C
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.
3
RN5RT
ELECTRICAL CHARACTERISTICS
• RN5RT30A
Symbol
Item
Conditions
MIN.
TYP.
MAX.
Topt=25˚C
Unit
V
OUT
I
OUT
∆V
OUT
∆I
OUT
V
DIF
I
SS
Istandby
∆V
OUT
∆V
IN
V
IN
∆V
OUT
∆Topt
I
lim
V
CEH
V
CEL
I
CEH
I
CEL
Output Voltage
Output Current
Load Regulation
Dropout Voltage
Supply Current
Supply Current (Standby)
Line Regulation
Input Voltage
Output Voltage
Temperature Coefficient
Short Current Limit
CE Input Voltage “H”
CE Input Voltage “L”
CE Input Current “H”
CE Input Current “L”
V
IN
=4.0V, I
OUT
=10mA
V
IN
=4.0V
V
IN
=4.0V
1mA≤I
OUT
≤60mA
I
OUT
=60mA
V
IN
=4.0V (except I
CEL
)
V
IN
=V
CE
=4.0V
I
OUT
=30mA
V
OUT
+0.5V≤V
IN
≤8V
2.940
40
3.000
60
40
0.3
4.0
0.1
3.060
V
mA
80
0.5
10
1.0
0.3
8
mV
V
µA
µA
%/V
V
ppm/˚C
mA
V
0
0.15
I
OUT
=10mA
–40˚C≤Topt≤85˚C
V
OUT
=0V
1.5
±100
30
0.25
V
CE
=V
IN
V
CE
=0V
–4.0
0
–2.0
0.1
–0.1
V
µA
µA
4
