Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsTS432ILT

April 2008 Rev 2 1/11

TS432

1.24 V adjustable shunt voltage reference

Features

■ 1.24 V typical output voltage

■ Ultra low operating current: 60 µA maximum at

25° C

■ High precision at 25° C:

+/- 1%

+/- 0.5%

■ High stability when used with capacitive loads

■ Industrial temperature range: -40° C to +85° C

■ 100 ppm/°C temperature coefficient

Applications

■ Computers

■ Instrumentation

■ Battery chargers

■ Switch mode power supply

■ Battery operated equipments

Description

The TS432 is an adjustable low power shunt

voltage reference providing an output voltage

from 1.24 V to 10 V over the industrial

temperature range (-40° C to +85° C). Available in

SOT23-3 surface mount package, it can be

designed in applications where space saving is

critical.

The low operating current is also a key advantage

for power restricted designs. In addition, the

TS432 is very stable and can be used in a broad

range of application conditions.

SOT23-3L

(Plastic micropackage)

SOT23-3

Cathode

Ref

Reference

Anode

Pin connections

(top view)

www.st.com

Summary of content (11 pages)

PAGE 1
TS432 1.24 V adjustable shunt voltage reference Features ■ 1.24 V typical output voltage ■ Ultra low operating current: 60 µA maximum at 25° C ■ High precision at 25° C: L SOT23-3L (Plastic micropackage) +/- 1% +/- 0.
PAGE 2
Absolute maximum ratings and operating conditions 1 TS432 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings (AMR) Symbol Parameter Value Unit VK Cathode voltage 12 V IK Cathode current -10 to +20 mA Iref Reference input current -0.
PAGE 3
TS432 Electrical characteristics 2 Electrical characteristics Table 3. Tamb = 25°C (unless otherwise specified) Symbol Parameter Test conditions Min. IK = 100µA, VK=VREF Vref Reference voltage ΔVref Reference voltage tolerance over temperature IKmin Minimum operating current Iref 1.252 TS432A (0.5%) 1.234 1.
PAGE 4
Electrical characteristics Figure 1. TS432 Reference voltage vs temperature Figure 2. Test circuit for VK = Vref Reference Voltage (V) 1.252 Input 1.248 Output VK = VREF IK = 100µA 1.244 Ik 1.240 VK 1.236 VREF 1.232 1.228 -40 0 40 80 120 Temperature (°C) Figure 3. Cathode voltage vs cathode current Figure 4. Cathode voltage vs cathode current 1.5 VK Cathode voltage (V) IK Cathode current (mA) 10 VK = VREF TAMB = +25°C 5 0 TAMB=-40°C 1.0 TAMB=+25°C TAMB=+85°C 0.
PAGE 5
TS432 Electrical characteristics Figure 7. Off-state current vs temperature Figure 8. Test circuit for off-state current measurement IOFF Off-State current (nA) 150 Input VK =10V VREF = 0 V VK = 10 V 100 IOFF 50 0 -40 0 40 80 120 Temperature (°C) Figure 9. Ratio of change in reference input voltage to change in VK voltage vs temperature Figure 10.
PAGE 6
Electrical characteristics TS432 Figure 13. Test circuit for pulse response at IK=100 µA 3V Figure 14. Test circuit for pulse response at IK = 1 mA 18KΩ 3V 1.8KΩ IK = 100µA V IK=1mA Intput Figure 16. Pulse response at IK = 1 mA Input and Output signals (Volt) Figure 15.
PAGE 7
TS432 Electrical characteristics Figure 19. Equivalent input noise vs frequency Figure 20. Block diagram 300 Noise (nV/√ Hz) TAMB = + 25°C Cathode 200 Vref + - 100 0 2 10 1.
PAGE 8
Package information 3 TS432 Package information In order to meet environmental requirements, STMicroelectronics offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics trademark.
PAGE 9
TS432 Package information Figure 21. SOT23-3 package mechanical drawing 7110469/A Table 4. SOT23-3 package mechanical data Dimensions Ref. Millimeters Min. Typ. Mils Max. Min. Typ. Max. A 0.890 1.120 35.05 44.12 A1 0.010 0.100 0.39 3.94 A2 0.880 1.020 34.65 b 0.300 0.500 11.81 19.69 C 0.080 0.200 3.15 7.88 D 2.800 3.040 110.26 E 2.100 2.64 82.70 E1 1.200 1.400 47.26 0.950 2.900 1.300 37.41 114.17 51.19 0.950 37.41 e1 1.900 74.82 0.400 L1 k 0.
PAGE 10
Ordering information 4 TS432 Ordering information Table 5. Order codes Precision Order code 1% TS432ILT 0.5% 5 Package Packing -40° C to +85° C SOT23-3 Tape & reel Marking L235 L236 Revision history Table 6. 10/11 TS432AILT Temperature range Document revision history Date Revision Changes 16-Dec-2002 1 Initial release. 7-Apr-2008 2 Corrected package mechanical data. Updated document format.
PAGE 11
TS432 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.