TS4431ILT STMicroelectronics, TS4431ILT Datasheet

IC VREF 1.224V OPN SHUNT SOT23-5

TS4431ILT

Manufacturer Part Number
TS4431ILT
Description
IC VREF 1.224V OPN SHUNT SOT23-5
Manufacturer
STMicroelectronics
Datasheet

Specifications of TS4431ILT

Reference Type
Shunt
Voltage - Output
1.224V
Tolerance
±1%
Temperature Coefficient
100ppm/°C
Voltage - Input
1.5 ~ 10 V
Number Of Channels
1
Current - Cathode
500µA
Current - Output
20mA
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SOT-23-5, SC-74A, SOT-25
Product
Voltage References
Topology
Shunt References
Output Voltage
Adjustable
Initial Accuracy
1 %
Average Temperature Coefficient (typ)
100 PPM / C
Series Vref - Input Voltage (max)
12 V
Shunt Current (max)
20 mA
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Shunt Current (min)
0.5 mA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Quiescent
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
497-5198-2
TS4431ILT

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TS4431ILT
Manufacturer:
ST
0
Description
The TS4431 is a four-terminal device dedicated to
low voltage Switch Mode Power Supplies (SMPS).
It integrates a 1.224V voltage reference, an
amplifier, and an open collector output transistor
in a single package. The TS4431’s operating
mode is similar to the well-known standard
voltage reference, the TL431. It maintains the
desired feedback voltage at the REF pin in a
closed loop configuration by sinking a current
proportional to the error voltage at the REF pin.
TS4431 features an open collector transistor with
an ultra-low saturation voltage, allowing it to be
used in series with the optocoupler in an SMPS
architecture to regulate low voltage SMPS.
Order Codes
November 2005
TS4431AILT
TS4431ILT
Internal 1.224V ±0.5% precision
Low output saturation voltage
75 mV max between SINK and GND
Low current consumption: 250 A
Industrial temperature range: -40 to +85°C
100ppm/°C temperature coefficient
Part Number
Accuracy
0.5%
1%
1.224V Open Collector Shunt Voltage Reference
Temperature Range
-40, +85°C
Applications
Low voltage switch mode power supplies
Isolated DC/DC converter
Computers
Low voltage discrete regulator
Package
SOT23-5
Pin connections (top view)
(Plastic Micropackage)
1
2
3
SOT23-5L
Tape & Reel
Vc c
Gnd
Nc
Packing
Sink
Ref
5
4
TS4431
Marking
L288
L275
www.st.com
Rev 2
1/8
8

Related parts for TS4431ILT

TS4431ILT Summary of contents

Page 1

... SMPS architecture to regulate low voltage SMPS. Order Codes Part Number Accuracy TS4431AILT 0.5% TS4431ILT 1% November 2005 Applications Low voltage switch mode power supplies Isolated DC/DC converter Computers Low voltage discrete regulator ...

Page 2

Absolute Maximum Ratings 1 Absolute Maximum Ratings Table 1. Key parameters and their absolute maximum ratings Symbol I Output sink current SINK V Supply voltage CC V Output voltage SINK P Power Dissipation D T Storage Temperature STD Human Body ...

Page 3

Typical Application Schematic 2 Typical Application Schematic Figure 1. SMPS power supply: secondary side 3 Vcc U1 Sink 1 TS4431 Cd1 100nF Gnd 2 Vref 3 Nc Ref TS4431 Vout ...

Page 4

Electrical Characteristics 3 Electrical Characteristics Table 3. Electrical characteristics for T otherwise specified Symbol V Reference voltage TS4431A 0.5% REF V Reference voltage TS4431 1% REF T Temperature coefficient C Change REF ---------------- - ...

Page 5

Electrical Characteristics Figure 2. Vref vs. temp. Isink=2mA 1.225 1.224 1.223 1.222 1.221 1.22 1.219 1.218 -40°C -20°C 0° perature (°C) Vcc=1.8V Figure 4. dVref/dVcc vs. temp. Isink=2mA 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 -40°C ...

Page 6

Electrical Characteristics Figure 8. dVref/dIsink vs. temp. Vcc=1. -40°C -20°C 0°C 25°C Tem perature (°C) Isink 0.5 to 20mA Figure 10. Vsat vs. temp. Vcc=1.8V 100 ...

Page 7

TS4431 4 Package Mechanical Data In order to meet environmental requirements, ST offers these devices in ECOPACK These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner ...

Page 8

... STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. ...

Related keywords