DESCRIPTION APPLICATIONS FEATURES BLOCK DIAGRAM

RS432
Adjustable Precision Shunt Regulator
DESCRIPTION
The RS432 series are three-terminal adjustable
regulators with guaranteed thermal stability over
applicable temperature ranges. The output voltage
may be set to any value between VREF (approximately
1.24 volts) and 18 volts with two external resistors.
These devices have a typical dynamic output
impedance of 0.2Ω. Active output circuitry provides a
very sharp turn-on characteristic, making these
devices excellent replacement for zener diodes in
many applications. The RS432 is available in a small
SOT-23 and TO-92 packages.
FEATURES
 Programmable precise output voltage from 1.24V
to 16V
 High stability under capacitive load
 Low dynamic output resistance: 0.2Ω typical
 Fast turn on response
 Low output noise
o
 Wide operating range of -40 to 125 C
 Low equivalent full-range temperature coefficient
o
with 50ppm/ C typical
 SOT-23 and TO-92 packages
 RoHS compliant and 100% lead (Pb)-free
APPLICATIONS




Opto-coupler linearization
Linear regulators
Improved zener
Variable reference
BLOCK DIAGRAM
FUNCTIONAL BLOCK DIAGRAM
SYMBOL
Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, No.233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan
RS432
APPLICATION CIRCUITS
Note: VKA=VREF(1+R1/R2)+IREFxR1
Fig 1. Test Circuit for VKA= VREF
Fig 2. Test Circuit for VKA > VREF
Fig 3. Test Circuit for Off-State Current
ORDERING INFORMATION
Device
RS432 X YY Z
V1.0
Device Code
X is Reference voltage precision designator:
B: 1.24V ±1.0%
C: 1.24V ±0.5%
YY is package designator :
N: SOT-23
A: TO-92
Z is Lead Free designator :
P: Commercial standard, Lead (Pb) Free and Phosphorous (P) Free package
2
September 2013
RS432
PIN ASSIGNMENTS
SOT-23
TO-92
PIN DESCRIPTION
Pin No.
SOT-23
TO92
1
1
3
2
2
3
Description
REFERENCE
ANODE
CATHODE
V1.0
3
September 2013
RS432
TYPICAL PERFORMANCE CHARACTERISTICS
V1.0
4
September 2013
RS432
V1.0
5
September 2013
RS432
ABSOLUTE MAXIMUM RATINGS
Parameter
Cathode Voltage
Cathode Current Range (Continuous)
Reference Input Current Range
SOT-23
Power Dissipation
TO-92
Operating Temperature Range (Max.)
Storage Temperature Range
Symbol
VKA
IK
IREF
Ratings
18
20
10
770
370
-40 to 150
-40 to 150
PD
TOPR
TSTG
Unit
V
mA
mA
mW
o
C
C
o
OPERATING CONDITION
Parameter
Cathode Voltage
Cathode Current Range (Continuous)
Operating Ambient Temperature Range
Symbol
VKA
IK
TOPR
Min
VREF
0.1
-40
Max
16
20
125
Unit
V
mA
o
C
ELECTRICAL CHARACTERISTICS
(TA=25°C, unless otherwise specified)
Parameter
1.24V ±1.0%
Reference Input
Voltage (Fig1)
1.24V ±0.5%
Ratio of Change in Reference Input Voltage
to the Change in Cathode Voltage (Fig2)
Reference Input Current (Fig2)
Symbol
VREF
VREF
VREF/VK
IREF
Minimum Cathode Current for Regulation
(Fig1)
IK(MIN)
Off-State Cathode Current (Fig3)
IK(off)
Dynamic Output Impedance (Fig1)
V1.0
ZK
6
Test Conditions
Min.
1.228
1.234
Typ.
1.24
1.24
Max.
1.252
1.246
Unit
-
1.0
2.7
mV/V
-
0.15
0.5
μA
VK=VREF
-
20
80
μA
VK=6V, VREF=0
VK=16V, VREF=0
VK=VREF, f1KHz,
IK=100μA to 20mA
-
0.01
0.04
0.05
0.15
μA
-
0.2
0.4
Ω
VK=VREF, IK=10mA
IK=10mA,
VK=18V to VREF
IK=10mA, R1=10KΩ,
R2=∞
V
September 2013
RS432
PACKAGE INFORMATION
6-PIN, SOT-23
Note: All dimensions are in millimeters.
V1.0
7
September 2013
RS432
3-PIN, TO-92
Notes:
1. Refer to JEDEC TO-226 AA.
2. All dimensions are in millimeter.
V1.0
8
September 2013
RS432
IMPORTANT NOTICE
Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements,
improvements, and other changes to its products and to discontinue any product without notice at any time.
PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No
circuit patent licenses are implied.
Princeton Technology Corp.
2F, 233-1, Baociao Road,
Sindian Dist., New Taipei City 23145, Taiwan
Tel: 886-2-66296288
Fax: 886-2-29174598
http://www.princeton.com.tw
V1.0
9
September 2013