VOLTAGE REGULATOR
WITH EXTERNAL POWER TRANSISTOR
RN5RG SERIES
APPLICATION MANUAL
ELECTRONIC DEVICES DIVISION
NO.EA-020-9803
NOTICE
1. The products and the product specifications described in this application manual are subject to change or dis-
continuation of production without notice for reasons such as improvement. Therefore, before deciding to use
the products, please refer to Ricoh sales representatives for the latest information thereon.
2. This application manual may not be copied or otherwise reproduced in whole or in part without prior written con-
sent of Ricoh.
3. Please be sure to take any necessary formalities under relevant laws or regulations before exporting or other-
wise taking out of your country the products or the technical information described herein.
4. The technical information described in this application manual shows typical characteristics of and example
application circuits for the products. The release of such information is not to be construed as a warranty of or a
grant of license under Ricoh's or any third party's intellectual property rights or any other rights.
5. The products listed in this document are intended and designed for use as general electronic components in
standard applications (office equipment, computer equipment, measuring instruments, consumer electronic
products, amusement equipment etc.). Those customers intending to use a product in an application requiring
extreme quality and reliability, for example, in a highly specific application where the failure or misoperation of
the product could result in human injury or death (aircraft, spacevehicle, nuclear reactor control system, traffic
control system, automotive and transportation equipment, combustion equipment, safety devices, life support
system etc.) should first contact us.
6. We are making our continuous effort to improve the quality and reliability of our products, but semiconductor
products are likely to fail with certain probability. In order prevent any injury to persons or damages to property
resulting from such failure, customers should be careful enough to incorporate safety measures in their design,
such as redundancy feature, fire-containment feature and fail-safe feature. We do not assume any liability or
responsibility for any loss or damage arising from misuse or inappropriate use of the products.
7. Anti-radiation design is not implemented in the products described in this application manual.
8. Please contact Ricoh sales representatives should you have any questions or comments concerning the prod-
ucts or the technical information.
June 1995
RN5RG SERIES
APPLICATION MANUAL
CONTENTS
OUTLINE
......................................................................................................
1
FEATURES
...................................................................................................
1
APPLICATIONS
.............................................................................................
1
BLOCK DIAGRAM
.........................................................................................
1
SERECTION GUIDE
.......................................................................................
2
PIN CONFIGURATION
...................................................................................
3
PIN DESCRIPTION
........................................................................................
3
ABSOLUTE MXIMUM RATINGS
.....................................................................
3
ELECTRICAL CHARACTERISTICS
................................................................
4
OPERATION
..................................................................................................
5
SELECTION GUIDE FOR EXTERNAL COMPONENTS
.....................................
5
TEST CIRCUITS
............................................................................................
6
TYPICAL CHARACTERISTICS
.......................................................................
7
1) Output Voltage vs. Input Voltage
........................................................................
7
2) Output Voltage vs. Output Current
......................................................................
7
3) Dropout Voltage vs. Output Current
.....................................................................
7
4) Output Voltage vs. Temperature
.........................................................................
8
5) Supply Current vs. Input Voltage
........................................................................
8
6) Supply Current vs. Temperature
.........................................................................
8
7) Standby Current vs. Input Voltage
......................................................................
9
8) Ripple Rejection
...........................................................................................
9
9) Line Transient Response (1)
............................................................................
9
10) Line Transient Response (2)
............................................................................
9
11) Load Transient Response
................................................................................
9
TYPICAL APPLICATION
..............................................................................
10
PACKAGE DIMENSIONS
..............................................................................
10
TAPING SPECIFICATIONS
...........................................................................
11
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 (I
OUT
=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).
• High Accuracy Output Voltage ........................±2.5%
• 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.
BLOCK DIAGRAM
V
DD
2
4
EXT
V
OUT
3
+
–
Vref
GND
1
CE
5
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 bc
↑
d
Code
Contents
a
b
Setting Output Voltage (V
OUT
):
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
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
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