Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsTS4436ICT

March 2006 Revision 1 1/8

TS4436

Adjustable 0.6V Open Collector Shunt Voltage Reference

■ Internal 0.6V ±0.5% precision

■ Low output saturation voltage

75mV max. between SINK and GND

■ Low current consumption: 150µA

■ Low supply voltage 1.7V

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

■ 150ppm/°C temperature coefficient

■ Lead free available

Description

The TS4436 is a four-terminal device dedicated to

low voltage Switch Mode Power Supplies

(SMPS).

It integrates a 0.6V voltage reference, an

amplifier, and an open collector output transistor

in a single package. The TS4436’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.

TS4436 features an open collector transistor with

an ultra-low saturation voltage. This feature allows

it to be used in series with the optocoupler in an

SMPS for regulation up to a 1.8V output voltage.

Applications

■ Low voltage switch mode power supplies

■ Isolated DC/DC converter

■ Computers

■ Low voltage discrete regulators

Order Codes

SC70

(Plastic Micropackage)

Pin connections (top view)

PGND

GND

REF

VSINK

PGND

GND

REF

VSINK

Part Number Accuracy Temperature Range Package Packing Marking

TS4436AICT 0.5%

-40, +85°C SC70 Tape & Reel

L22

TS4436ICT 1% L21

www.st.com

Summary of content (8 pages)

PAGE 1
TS4436 Adjustable 0.6V Open Collector Shunt Voltage Reference ■ Internal 0.6V ±0.5% precision ■ Low output saturation voltage 75mV max. between SINK and GND ■ Low current consumption: 150µA ■ Low supply voltage 1.7V ■ Industrial temperature range: -40 to +85°C ■ 150ppm/°C temperature coefficient ■ Lead free available SC70 (Plastic Micropackage) Pin connections (top view) Description The TS4436 is a four-terminal device dedicated to low voltage Switch Mode Power Supplies (SMPS).
PAGE 2
Absolute Maximum Ratings and Operating Conditions 1 TS4436 Absolute Maximum Ratings and Operating Conditions Table 1.
PAGE 3
Typical Application Schematic 2 TS4436 Typical Application Schematic Figure 1.
PAGE 4
Electrical Characteristics 3 TS4436 Electrical Characteristics Table 3. Symbol Electrical characteristics for Tamb = 25°C, VCC = 1.8V, ISINK = 2mA unless otherwise specified Parameter Vref Reference voltage TS4436A 0.5% Vref Reference voltage TS4436 1% TC Temperature coefficient RegLine RegLoad Test Conditions 4/8 0.597 0.6 0.603 0.589 0.611 0.594 0.6 0.606 0.589 0.6 0.611 V -40°C < T < +85°C 150 1 2.5 -40°C < T < +85°C 2 3 Change in Vref due to change in ISINK ISINK=0.
PAGE 5
Electrical Characteristics Vref vs. temperature Figure 3. Vref vs. temperature 0.602 0.602 0.6015 0.6015 Vref (V) Vref (V) Figure 2. TS4436 0.601 0.6005 0.601 0.6005 0.6 0.6 0.5995 0.5995 -40 -20 0 25 50 -40 85 -20 Vcc=10V Isink=2mA Vcc=1.8V Isink=2mA ICC vs. temperature Figure 5. 250 60 200 50 Number of product Icc (µA) Figure 4. 150 100 50 0 85 Vcc=1.7V Isink=2mA 40 30 20 10 -20 0 25 50 85 Icc < 160 Icc < 165 Figure 7.
PAGE 6
Package Mechanical Data 4 TS4436 Package Mechanical Data In order to meet environmental requirements, ST 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 ST trademark. ECOPACK specifications are available at: www.
PAGE 7
TS4436 5 Revision History Revision History Table 4. Document revision history Date Revision Feb. 2006 1 Changes First release of datasheet.
PAGE 8
TS4436 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.