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TS432I

Adjustable Precision Shunt Regulator

Document Number: DS_P0000228

Version: D15

SOT

General Description

The TS432AI/TS432BI is a three-terminal adjustable shunt regulator with specified thermal stability. The output voltage

may be set to any value between V

REF

(approximately 1.24V) and 18V with two external resistors. The

TS432AI/TS432BI has a typical output impedance of 0.05. Active output circuitry provides a very sharp turn-on

characteristic, making the TS432AI/TS432BI excellent replacement for zener diode in many applications.

Features

 Precision Reference Voltage

TS432AI – 1.24V±1%

TS432BI – 1.24V±0.5%

 Minimum Cathode Current for Regulation: 20µA(typ.)

 Equivalent Full Range Temp. Coefficient: 50ppm/ ºC

 Programmable Output Voltage up to 18V

 Fast Turn-On Response

 Sink Current Capability of 80µA to 100mA

 Low Dynamic Output Impedance: 0.2

 Low Output Noise

Ordering Information

Part No. Package Packing

TS432xIX RFG SOT-23 3,000pcs / 7” Reel

TS432xIX RKG SOT-23 10,000pcs / 13” Reel

Note: “G” denote for Halogen Free Product

Note: Where xx denotes voltage tolerance

A: ±1%, B: ±0.5%

Block Diagram

Application

 Voltage Monitor

 Delay Timmer

 Constant –Current Source/Sink

 High-Current Shunt Regulator

 Crow Bar

 Over-Voltage / Under-Voltage Protection

Absolute Maximum Ratings

= 25˚C unless otherwise noted)

Parameter Symbol Limit Unit

Cathode Voltage (Note 1) V

18 V

Continuous Cathode Current Range I

100 mA

Reference Input Current Range I

REF

3 mA

Power Dissipation

TO-92

0.625

SOT-23 0.35

Junction Temperature T

+150

Operation Temperature Range T

OPER

-40 ~ +105

Storage Temperature Range T

STG

-65 ~ +150

Note 1: Voltage values are with respect to the anode terminal unless otherwise noted.

Note 2: Rating apply to ambient temperature at 25

Definition

1. Reference

2. Cathode

3. Anode

Summary of content (10 pages)

PAGE 1
TS432I Adjustable Precision Shunt Regulator SOT-23 Pin Definition: 1. Reference 2. Cathode 3. Anode General Description The TS432AI/TS432BI is a three-terminal adjustable shunt regulator with specified thermal stability. The output voltage may be set to any value between VREF (approximately 1.24V) and 18V with two external resistors. The TS432AI/TS432BI has a typical output impedance of 0.05Ω.
PAGE 2
TS432I Adjustable Precision Shunt Regulator Recommend Operating Condition Parameter Symbol Limit Unit VKA IK 18 100 V mA Cathode Voltage (Note 1) Continuous Cathode Current Range Recommend Operating Condition Parameter TS432AI TS432BI Deviation of reference input voltage Radio of change in Vref to change in cathode Voltage Reference voltage Symbol VREF ∆VREF ∆VREF/∆VKA Reference Input current IREF Deviation of reference input current, over temp.
PAGE 3
TS432I Adjustable Precision Shunt Regulator Test Circuits Figure 1: VKA = VREF Figure 2: VKA > VREF Figure 3: Off-State Current Additional Information – Stability When The TS432AI/432BI is used as a shunt regulator, there are two options for selection of CL, are recommended for optional stability: A) No load capacitance across the device, decouple at the load. B) Large capacitance across the device, optional decoupling at the load.
PAGE 4
TS432I Adjustable Precision Shunt Regulator Applications Examples (Continue) Figure 6: Shunt Regulator Figure 7: High Current Shunt Regulator Figure 8: Series Pass Regulator Figure 9: Constant Current Source Figure 10: TRIAC Crowbar Figure 11: SCR Crowbar Document Number: DS_P0000228 4 Version: D15
PAGE 5
TS432I Adjustable Precision Shunt Regulator Applications Examples (Continue) VIN VREF VOUT V+ ≈0.
PAGE 6
TS432I Adjustable Precision Shunt Regulator Typical Performance Characteristics Test Circuit for Voltage Amplification Figure 15: Small-Signal Voltage Gain and Phase Shift vs. Frequency Test Circuit for Reference Impedance Figure 16: Reference Impedance vs.
PAGE 7
TS432I Adjustable Precision Shunt Regulator Typical Performance Characteristics Test Circuit for Curve A The areas under the curves represent conditions that may cause the device to oscillate. For curves B, C, and D, R2 and V+ were adjusted to establish the initial VKA and IKA conditions with CL=0. VBATT and CL then were adjusted to determine the ranges of stability.
PAGE 8
TS432I Adjustable Precision Shunt Regulator Electrical Characteristics Figure 20: Reference Current vs. Temperature Figure 19: Reference Voltage vs. Temperature Figure 21: Cathode Current vs.
PAGE 9
TS432I Adjustable Precision Shunt Regulator SOT-23 Mechanical Drawing Unit: Millimeters Marking Diagram x = Device Code (D = TS432AI, E = TS432BI) 3 = SOT-23 package Y = Year Code M = Month Code for Halogen Free Product O =Jan P =Feb Q =Mar R =Apr S =May T =Jun U =Jul V =Aug Y =Nov Z =Dec W =Sep X =Oct L = Lot Code Document Number: DS_P0000228 9 Version: D15
PAGE 10
TS432I Adjustable Precision Shunt Regulator Notice Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, to any intellectual property rights is granted by this document.