RN5RG21AC-TL [RICOH]
Analog Circuit, 1 Func, CMOS, PDSO5, MINI, PLASTIC, SOT-23, 5 PIN;
| 型号： | RN5RG21AC-TL |
| 厂家： | 
RICOH ELECTRONICS DEVICES DIVISION |
| 描述： | Analog Circuit, 1 Func, CMOS, PDSO5, MINI, PLASTIC, SOT-23, 5 PIN 光电二极管 |
| 文件： | 总11页 (文件大小：126K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
VOLTAGE REGULATOR
WITH EXTERNAL POWER TRANSISTOR
RN5RG SERIES
APPLICATION MANUAL
NO.EA-020-0006
VOLTAGE REGULATOR WITH
EXTERNAL POWER TRANSISTOR
RN5RG SERIES
OUTLINE
The RN5RG Series are voltage regulator ICs with an external power transistor with high output voltage accu-
racy and lowest supply current by CMOS process. Each of these voltage regulator ICs consists of a voltage refer-
ence unit, an error amplifier and resistors.
These ICs are suitable for constructing regulators with ultra-low dropout voltage and an output current in the
range of several tens mA to several hundreds mA.
Furthermore, these ICs have a chip enable function, so that the supply current on standby can be minimized.
Since the package for these ICs are SOT-23-5 (Mini-mold) package, high density mounting of the ICs
on boards is possible.
FEATURES
• Ultra-Low Supply Current
..............................
TYP. 50µA
.....................................................
• Standby Mode
TYP. 0.2µA
.............................
• Ultra-Low Dropout Voltage
TYP. 0.1V (IOUT=100mA : dependent on External Tr.)
...................
• Low Temperature-Drift Coefficient of Output Voltage
................................
TYP. ±100 ppm/˚C
• Excellent Line Regulation
TYP. 0.1%/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).
±2.5%
........................
• High Accuracy Output Voltage
..................................................
• Small Package
SOT-23-5(Mini-Mold)
APPLICATIONS
• Power source for battery-powered equipment.
• Power source for cameras, VCRs, camcorders, hand-held audio instruments, and hand-held communication
equipment.
• Power source for domestic appliances.
EXT
BLOCK DIAGRAM
VDD
VOUT
4
2
3
+
–
Vref
GND
1
5
CE
1
RN5RG
SELECTION GUIDE
The output voltage, the version, the packing type, and the taping type for the ICs can be selected at the user's
request.
The selection can be made by designating the part number as shown below :
RN5RG×××× – ×× ← Part Number
↑ ↑ ↑
↑
a b c
d
Code
Contents
Setting Output Voltage (VOUT):
Stepwise setting with a step of 0.1V in the range of 2.0V to 6.0V is possible.
a
b
A
Designation of Packing Type:
A: Taping
c
C: Antistatic bag for samples
Designation of Taping Type:
Ex. TR, TL
d
(refer to Taping Specifications)
“TR” is prescribed as a standard.
For example, the product with Output Voltage 5.0V, Version A, and Taping Type TR is designated by Part
Number RN5RG50AA-TR.
2
RN5RG
PIN CONFIGURATION
•
5
SOT-23-5
4
(mark side)
1
2
3
PIN DESCRIPTION
Pin No.
Symbol
GND
VDD
Description
1
2
3
4
5
Ground Pin
Input Pin
VOUT
EXT
CE
Output Pin
External Transistor Drive Pin (Nch Open Drain Output)
Chip Enable Pin
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Rating
+12
Unit
V
VIN
Input Voltage
VCE
Input Voltage (CE Pin)
EXT Output Voltage
–0.3 to VIN+0.3
+12
V
VEXT
IEXT
V
EXT Output Current
50
mA
mW
˚C
PD
Power Dissipation
150
Topt
Tstg
Tsolder
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering)
–40 to +85
–55 to +125
260˚C,10s
˚C
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.
3
RN5RG
ELECTRICAL CHARACTERISTICS
Topt=25˚C
Symbol
Item
Conditions
MIN.
TYP.
MAX.
Unit
Note
VIN=8.0V
VOUT
VOUT
×
1.025
VOUT
Output Voltage
V
×
IOUT=50mA
0.975
IOUT
IEXT
Output Current
EXT Current
VIN–VOUT=1.0V
1000
mA
mA
Note
VIN=4.0V, VEXT=2.0V
10
∆VOUT
∆IOUT
VIN–VOUT=1.0V
Load Regulation
Dropout Voltage
Supply Current
–60
60
200
80
mV
mV
µA
1mA≤IOUT≤100mA
VDIF
ISS
IOUT=100mA
100
50
VIN–VOUT=1.0V
IOUT=0mA (at no load)
Istandby
Supply Current (Standby)
EXT Leakage Current
VIN=8V
0.01
0
0.2
1.0
0.5
µA
µA
IEXTleak
∆VOUT
∆VIN
IOUT=50mA
0.1
0.3
%/V
Line Regulation
VOUT+0.5V≤VIN≤8V
VIN
Input Voltage
8
8
V
V
VEXT
EXT Output Voltage
∆VOUT
∆Topt
Output Voltage
IOUT=10mA
±100
ppm/˚C
Temperature Coefficient
–40˚C≤Topt≤85˚C
VCEH
VCEL
ICEH
ICEL
CE Input Voltage “H”
CE Input Voltage “L”
CE Input Current “H”
CE Input Current “L”
1.5
–5
V
V
0.25
0.1
0
µA
µA
–3
–0.1
(Note) The output current depends upon the performance of External PNP Transistor. Use External PNP Transistor of a low saturation type, with an hFE
of 100 or more.
)
With respect to Test Circuits, refer to the Typical Application.
*
4
RN5RG
OPERATION
In these ICs, Output Voltage VOUT is detected by
Feed-back Registers RA, RB, and the detected Output
Voltage is compared with a reference voltage by Error
Amplifier, so that the base current of External PNP
Transistor is adjusted and Output Voltage VOUT is regu-
lated.
External PNP Transistor
EXT
VOUT
3
4
IN
OUT
GND
2
Error
Amplifier
VDD
RA
+
–
RB
Vref
GND
1
5
CE
SELECTION GUIDE FOR EXTERNAL COMPONENTS
1.External PNP Transistor
Select External PNP Transistor from the view-
External PNP Transistor
R1
OUT
VIN
points of output current, input voltage and power dis-
sipation.
R2
EXT
4
CL
VOUT
Generally External PNP Transistor with low VCE
and high hFE is suitable.
(
SAT
)
3
2.Base Resistor R2
EXT Pin of these ICs is protected by a current limit circuit from the destruction caused by excess current.
However, since this current limit circuit is provided for the purpose of protecting the IC, use a resistor R2 for the
protection of the External Transistor, although this IC can be operated without such a resistor. It is required that
the resistance of the Resistor R2 be determined with the input voltage, output voltage,output current, tempera-
ture, and the hFE value taken into consideration and the dispersion of these values. Before making such a deter-
mination, check the characteristics by calculating the respective values by using the following formula :
VIN [MIN.] –1.2(V)
R2
0.7(V)
R1
IOUT [MAX.]
hFE
–
>
3.Phase Compensation
In these ICs, phase compensation is made for securing stable operation even when the load current is varied.
For this purpose, be sure to use a capacitor CL (tantalum type) with a capacitance of 10µF or more and a resistor
R1 with a resistance of about 10kΩ between the base and the emitter.There may be the case the loop oscillation
takes place when a tantalum capacitor CL with a large ESR is used, so select the CL carefully including the fre-
quency characteristics.
5
RN5RG
TEST CIRCUITS
PNP
PNP
10kΩ
2SA1213
10kΩ
VDD
2
2SA1213
VOUT
EXT
ISS
OUT
4
IN
VDD
VOUT
EXT
IOUT
3
4
OUT
IN
2
3
RN5RG SERIES
10µF
RN5RG SERIES
GND
10µF
10µF
GND
CE
5
1
1
(2)
(1)
5
CE
Test Circuit 1 : Typical Characteristics 1) to 4)
Test Circuit 2 : Typical Characteristics 5) to 7)
PNP
PNP
10kΩ
2SA1213
10kΩ
2SA1213
EXT
VOUT
3
EXT
VDD
2
VOUT
VDD
2
IN
4
4
IN
3
Oscilloscope
CL
Oscilloscope
1µF
RN5RG SERIES
GND
RN5RG SERIES
GND
P.G.
10mA
1
1
5
300mA
5
CE
CE
Test Circuit 3 : Typical Characteristics 8) to 10)
Test Circuit 4 : Typical Characteristics 11)
6
RN5RG
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Input Voltage
RN5RG50A
RN5RG30A
Topt=25˚C
Topt=25˚C
3.2
3.1
3.0
2.9
2.8
2.7
2.6
2.5
2.4
2.3
2.2
5.0
IOUT=0mA
4.5
IOUT=100mA
IOUT=0mA
IOUT=500mA
IOUT=100mA
IOUT=500mA
4.0
3.5
3.0
3.0
4.0
5.0
6.0
7.0
8.0
2
3
4
5
6
7
8
Input Voltage VIN(V)
Input Voltage VIN(V)
2) Output Voltage vs.Output Current
RN5RG50A
RN5RG30A
Topt=25˚C
Topt=25˚C
VIN=4.0V
4.962
4.960
4.958
4.956
4.954
4.952
4.950
4.948
4.946
4.944
4.942
2.974
2.972
2.970
2.968
2.966
2.964
2.962
2.960
VIN=6.0V
5.1V
3.1V
0
100
200
300
400
500
0
100
200
300
400
500
Output Current IOUT(mA)
Output Current IOUT(mA)
3) Dropout Voltage vs. Output Curret
RN5RG30A
RN5RG50A
0.45
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0.40
Topt=85˚C
Topt=85˚C
25˚C
0.35
0.30
25˚C
0.25
0.20
0.15
–40˚C
–40˚C
0.10
0.05
0.00
0
200
400
600
800 1000
0
200
400 600
800 1000
Output Current IOUT(mA)
Output Current IOUT(mA)
7
RN5RG
4) Output Voltage vs.Temperature
VIN=4V,IOUT=10mA
RN5RG30A
VIN=6V,IOUT=10mA
RN5RG50A
3.05
3.03
3.01
2.99
2.97
2.95
5.1
5.08
5.06
5.04
5.02
5
-60 -40 -20
0
20 40 60 80 100
-60 -40 -20
0
20 40 60 80 100
Tem perature Topt(˚C)
Tem perature Topt(˚C)
5) Supply Current vs. Input Voltage
IOUT=0mA
IOUT=0mA
RN5RG50A
RN5RG30A
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
Topt=-40˚C
25˚C
Topt=-40˚C
25˚C
85˚C
85˚C
4
5
6
7
8
2
3
4
5
6
7
8
Input Voltage VIN(V)
Input Voltage VIN(V)
6) Supply Current vs. Temperature
VIN=6V,IOUT=0mA
RN5RG50A
VIN=4V,IOUT=0mA
RN5RG30A
60
50
40
60
50
40
30
20
30
20
10
0
10
0
-60 -40 -20
0
20 40 60 80 100
-60 -40 -20
0
20 40 60 80 100
Tem perature Topt(˚C)
Tem perature Topt(˚C)
8
RN5RG
7) Standby Current vs. Input Voltage
RN5RG30A
RN5RG30A
0.45
0.4
0.45
0.4
Topt=85˚C
Topt=85˚C
0.35
0.3
0.35
0.3
0.25
0.2
0.25
0.2
0.15
0.1
0.05
0
25˚C
25˚C
–40˚C
0.15
0.1
–40˚C
0.05
0
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Tem perature Topt(˚C)
Tem perature Topt(˚C)
8) Ripple Rejection
RN5RG50A
9) Line Transient Response (1)
Topt=25˚C
IOUT=10mA
Topt=25˚C
RN5RG50A
60
50
40
30
20
10
0
50
40
8
7
6
5
4
Input Voltage
30
20
10
0
Output Voltage
–10
–20
10
100
1k
10k 100k
0
20 40 60 80 100 120 140
Frequency f(Hz)
CL=10 µF
Time t(µs)
CL=1µF
IOUT=200mA
VIN=6Vdc+0.5(p-p)
10) Line Transient Response (2)
11) Load Transient Response
Topt=25˚C
VIN=6.0V
Topt=25˚C
IOUT=100mA
RN5RG50A
RN5RG50A
500
400
300
200
100
500
50
40
8
7
6
5
4
400
Output Current
Input Voltage
300
200
100
0
30
20
10
0
Output Voltage
–100
Output Voltage
0
–10
–20
–200
–300
–100
0
4
8
12
16 20
24
140
0
20 40 60 80 100 120 140
Time t(ms)
Time t(µs)
CL=1µF
CL=1µF
9
RN5RG
TYPICAL APPLICATION
PNP Tr
EXT
OUT
IN
VOUT
VDD
RN5RG SERIES
+
+
Cap.
Cap.
CE
GND
Parts Transistor : 2SA1213
Resistor : 10kΩ
Capacitor : 10µF(tantalum type)
10
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