RN5RF SERIES
LOW RIPPLE VOLTAGE REGULATOR WITH EXTERNAL TRANSISTOR
NO. EA-043-111116
1
OUTLINE
The RN5RF Series are CMOS-based voltage regulator ICs which control external driver transistors with high
ripple rejection, high ac curacy output voltage, low supply current. Each of these volt age regul ator ICs consi st s of
a voltage reference unit, an error amplifier, output voltage setting resistor, short circuit current limiting circuit and
chip enable circuit. These ICs are suitable for constructing regulators with ultra low dropout voltage and an
output current in the range of several tens of mA and several hundreds mA. In addition to low supply current by
CMOS process, chip enable function can be used to conserve battery life during standby.
Furthermore, a supre me rip ple rejection and a transie nt response a re suit able for port a ble com municator such
as cell phones, PDAs, walky talkies. SOT23-5 (Mini Mold) package is available.
FEATURES
• Supply Current.............................................................Typ. 30μA
• Supply Current (Standby) ...........................................Typ. 0.1μA
• Output Voltage Accuracy..............................................±2%
• Ripple Rejection...........................................................Typ. 60dB (f=1kHz)
• Dropout Voltage ...........................................................Typ. 0.1V (IOUT=100mA, dependent on External Tr.)
• Temperature-Drift Coefficient of Output Voltage..........Typ. ± 100ppm/°C
• Line Regulation............................................................Typ. 0.05%/V
• Output Voltage Range..................................................1.2V to 6.0V (0.1V steps)
(For other voltages, please refer to MARK INFORMATIONS.)
• Package.......................................................................SOT-23-5
• Current Limit for external Tr. ........................................Current limit Typ. 8mA
APPLICATIONS
• Power source for battery-powered equipment
• Power source for hand-held communication equipm ent, cameras, and VCRs
• Power source for home appliances
RN5RF
2
BLOCK DIAGRAMS
RN5RFxxA RN5RFxxB
2
51
V
OUT
GND
V
DD
CE
Vref
3
Current Limit
+
-
4
EXT
2
51
V
OUT
GND
V
DD
CE
Vref
3
Current Limit
+
-
4EXT
SELECTION GUIDE
The output voltage an d CE pin polarity for the ICs can be selected at the user’s request.
Product Name Package Quantity per Reel Pb Free Halogen Free
RN5RFxx∗A-TR-FE SOT-23-5 3,000 pcs Yes Yes
xx : The output voltage can be designated in the range from 1.2V (12) to 6.0V (60) in 0.1V steps.
(For other voltages, please refer to MARK INFORMA TIONS.)
∗ : CE pin polarity are options as follows
(A) "L" active
(B) "H" active
RN5RF
3
PIN CONFIGURATION
z SOT-23-5
1
4
5
23
(mark side)
PIN DESCRIPTION
• SOT-23-5
Pin No Symbol Pin Description
1 GND Ground Pin
2 VDD Input Pin
3 VOUT Output Pin
4 EXT External Transistor Drive Pin (CMOS Output)
5
CE
or CE Chip Enable Pin
RN5RF
4
ABSOLUTE MAXIMUM RATINGS
Symbol Item Rating Unit
VIN Input Voltage 12.0 V
VCE Input Voltage (
CE
or CE) −0.3 to VIN+0.3 V
VEXT EXT Output Voltage −0.3 to VIN+0.3 V
IEXT EXT Output Current 50 mA
PD Power Dissi pation∗ (SOT-23-5) 420 mW
Topt Operating Temperature Range −40 to 85 °C
Tstg Storage Temperature Range −55 to 125 °C
∗) For Power Dissipation, please refer to PACKAGE INFORMATION.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the
permanent damages and may degrade the life time and safety for both device and system u sing the device
in the field.
The functional operation at or over these absolute maximum ratings is not assured.
RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)
All of electronic equipment sho uld b e designed that the mounted semiconductor device s o perate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the
recommended operating conditions, even if when they are used over such conditions by momentary
electronic noise or su rge. And the semicondu ctor devices may receive seriou s damage when they continu e
to operate over the recommended operating conditions.
RN5RF
4
ELECTRICAL CHARACTERISTICS
• RN5RFxxA
;+=
Symbol Item Conditions Min. Typ. Max. Unit
5 5
'';'
;1&'
'
×1#J>
'
×3#1+ 5
55;3#15 3#1 '
$G 5;F#15!5;+#15 > 3 &'
∆5:∆ 0 55;3#15
3&'≤≤311&' 81 81 &5
5 )5 ;311&'!;1&' 1#3 1#+ 5
" 55;3#15 ,1 1 2'
" " 5;31#15 1#13 1#31 3#11 2'
$G0* 1# 2'
∆5:∆5 0 ;1&'
5H1#5≤5≤315 1#11 1#1 1#,1 7:5
%;3*4<!1#5
55;3#15 81 9
5 5 31 5
5 $G5 31 5
∆5:∆ 5&
%%
;31&'
F1=≤ ≤>= 6311 &:=
(%$ F Ω
5 CE 5C4D 3# 5 5
5 CE 5C0D 1#11 1#+ 5
*1) The output current depends on the performance of external PNP transistor. Use External PNP transis-
tor of a low saturation type, with an hFE between 100 and 300.
*) With respect to Test Circuit, refer to Typical Application.
RN5RF
5
• RN5RFxxB
;+=
Symbol Item Conditions Min. Typ. Max. Unit
5 5 55;3#15
;1&'
'
×1#J>
'
×3#1+ 5
55;3#15 3#1 '
$G 5;F#15!5;+#15 > 3 &'
∆5:∆ 0 55;3#15
3&'≤≤311&' 81 81 &5
5 )5 ;311&' 1#3 1#+ 5
" 5B5;3#15
;1&' ,1 1 2'
" " 5;31#15 1#13 1#31 3#11 2'
$G0* 1# 2'
∆5:∆V 0 ;1&'
5H1#5≤5≤315 1#11 1#1 1#,1 7:5
%;3*4<!1#5
5B5;3#15 81 9
5 5 31 5
5 $G5 31 5
∆5:∆ 5&
%%
;31&'
F1=≤ ≤>= 6311 &:=
(%$
FΩ
5 $5C4D 3# 5 5
5 $5C0D 1#11 1#+ 5
*1) The output current depends on the performance of external PNP transistor. Use External PNP transis-
tor of a low saturation type, with an hFE between 100 and 300.
*) With respect to Test Circuit, refer to Typical Application.
RN5RF
6
OPERATION
2
51
VOUT
GND
VDD
CE
Vref
3
Current Limit
+
-
4
EXT
IN
GND
RN5RFxxA
PNP Tr
Ra
Rb CLC
OUT
GND
!55"%*!
&%"&%%((
5#
%#&"&*
#&!&&
"!5&#
Notes on selecting external components
-3. ((
9%%!%((#
$((5-.311,11#
-+. &!&&%%
#!-&".%312%
&#&"*&$
!%"%?"#
RN5RF
7
TEST CIRCUITS
PNP
EXT
V
OUT
OUT
10µF
GND
CE
10µF
V
DD
IN
RN5RFxxA
5
1
3
4
2
I
OUT
PNP
EXT
V
OUT
OUT
10µF
GND
CE
10µF
V
DD
IN
RN5RFxxA
5
1
3
4
2
I
SS
Basic Test Circuit Test Circuit for Supply Current
PNP
EXT
VOUT OUT
10µF
GND
CE
VDD
IN
RN5RFxxA
5
1
3
4
2
P.G
IOUT
PNP
EXT
V
OUT
OUT
10µF
GND
CE
10µF
V
DD
IN
RN5RFxxA
5
1
3
4
2
Test Circuit for Ripple Rejection and Line
Transient Response
Test Circuit for Load Transient Response
RN5RF
8
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Input Voltage (Topt=25°C)
RN5RF30A RN5RF50A
3.20
2.60
2.40
2.20
3.00
2.80
2.00
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
2345678910
I
OUT
=0mA
I
OUT
=100mA
I
OUT
=500mA
5.20
4.60
4.40
4.20
5.00
4.80
4.00
Input Voltage V
IN
(V)
Output Voltage V
OUT
(V)
45678910
I
OUT
=0mA
I
OUT
=100mA
I
OUT
=500mA
2) Output Voltage vs. Output Current (Topt=25°C)
RN5RF30A RN5RF50A
3.10
2.95
2.90
2.85
3.05
3.00
2.80
Output Current I
OUT
(mA)
Output Voltage V
OUT
(V)
0 100 200 300 400 500
V
IN
=4V 5.10
4.95
4.90
4.85
5.05
5.00
4.80
Output Current I
OUT
(mA)
Output Voltage V
OUT
(V)
0 100 200 300 400 500
V
IN
=6V
3) Dropout Voltage vs. Output Current
RN5RF30A RN5RF50A
0.50
0.20
0.40
0.30
0.10
0.00
Output Current IOUT(mA)
Dropout Voltage VDIF(V)
0 300100 200 400 500
Topt=-40
Topt=25
Topt=85
0.50
0.20
0.40
0.30
0.10
0.00
Output Current IOUT(mA)
Dropout Voltage VDIF(V)
0 300100 200 400 500
Topt=-40
Topt=25
Topt=85
RN5RF
9
4) Output Voltage vs. Temperature
RN5RF30A RN5RF50A
3.10
3.00
3.05
2.95
2.90
Temperature Topt( )
Output Voltage V
OUT
(V)
-50 25-25 0 50 75 100
V
IN
=4V,I
OUT
=10mA
5.10
5.00
5.05
4.95
4.90
-50 25-25 0 50 75 100
V
IN
=6V,I
OUT
=10mA
Temperature Topt( )
Output Voltage VOUT(V)
5) Supply Current vs. Input Voltage (Topt=25°C)
RN5RF30A RN5RF50A
100
60
50
80
70
90
40
30
20
10
0
Input Voltage VIN(V)
Supply Current ISS(µA)
0426810
I
OUT
=0mA 100
60
50
80
70
90
40
30
20
10
0
Input Voltage VIN(V)
Supply Current ISS(µA)
0426810
I
OUT
=0mA
6) Supply Current vs. Temperature
RN5RF30A RN5RF50A
50
30
40
20
10
0
Temperature Topt( )
Supply Current I
SS
(µA)
-50 0-25 25 50 75 100
V
IN
=4V,I
OUT
=0mA 50
30
40
20
10
0
Temperature Topt( )
Supply Current I
SS
(µA)
-50 0-25 25 50 75 100
V
IN
=6V,I
OUT
=0mA
RN5RF
10
7) Ripple Rejection vs. Frequency (Topt=25°C)
RN5RF30A RN5RF50A
80
70
50
60
40
20
30
10
0
Frequency (kHz)
Ripple Rejection (dB)
0.01 0.1 1 10 100
V
IN
=4Vdc+0.5Vp-p,I
OUT
=100mA,C
L
=10µF80
70
50
60
40
20
30
10
0
Frequency (kHz)
Ripple Rejection (dB)
0.01 0.1 1 10 100
V
IN
=6Vdc+0.5Vp-p,I
OUT
=100mA,C
L
=10µF
8) Line Transient Response (Topt=25°C)
RN5RF30A RN5RF50A
6
5
4
3
2
1
0
Time T(µs)
Input Voltage V
IN
(V)
-50 0-25 25 50 75 100 125 150
I
OUT
=300mA,C
L
=10µF3.3
3.2
3.1
3
2.9
2.8
2.7
Output Voltage V
OUT
(V)
Input Voltage
Output Voltage
8
7
6
5
4
3
2
Time T(µs)
Input Voltage V
IN
(V)
-50 0-25 25 50 75 100 125 150
I
OUT
=300mA,C
L
=10µF5.3
5.2
5.1
5
4.9
4.8
4.7
Output Voltage V
OUT
(V)
Input Voltage
Output Voltage
9) Load Transient Response (Topt=25°C)
RN5RF30A RN5RF50A
200
100
0
-100
-200
-300
-400
3.3
3.2
3.1
3
2.9
2.8
2.7
Time T(µs)
Output Current IOUT(mA)
Output Voltage VOUT(V)
-100 0 100 200 300 400
V
IN
=4V,C
L
=10µF
Output Current
Output Voltage
200
100
0
-100
-200
-300
-400
Time T(µs)
Output Current IOUT(mA)
-100 0 100 200 300 400
V
IN
=6V,C
L
=10µF5.3
5.2
5.1
5
4.9
4.8
4.7
Output Voltage VOUT(V)
Output Current
Output Voltage
RN5RF
11
TYPICAL APPLICATION
PNP Tr
EXT
OUT
Cap.
+
GND
CE
VDDIN RN5RFxxA VOUT
Cap.
+
Components
Transistor: 2SB766A
Capacitor: 10µF (Tantalum type)
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