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| 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: 150A Low supply voltage 1.7V Industrial temperature range: -40 to +85C 150ppm/C temperature coefficient Lead free available 1 PGND REF 5 SC70 (Plastic Micropackage) Pin connections (top view) 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. 2 GND 3 SINK V CC 4 Applications Low voltage switch mode power supplies Isolated DC/DC converter Computers Low voltage discrete regulators Order Codes Part Number TS4436AICT TS4436ICT Accuracy 0.5% -40, +85C 1% SC70 Tape & Reel L21 Temperature Range Package Packing Marking L22 March 2006 Revision 1 1/8 www.st.com 8 Absolute Maximum Ratings and Operating Conditions TS4436 1 Absolute Maximum Ratings and Operating Conditions Table 1. Symbol ISINK VCC VSINK Pdiss Pdiss TSTD ESD Machine Model (MM) TLEAD Lead Temperature (soldering, 10 seconds) 200 250 V C Output sink current Supply voltage Output voltage Power Dissipation Power Dissipation (1)SOT23-5 (2)SC70 Key parameters and their absolute maximum ratings Parameter Value 30 12 12 Unit mA V V mW 310 -65 to +150 2 mW C kV Storage Temperature Human Body Model (HBM) 1. Pdiss has been calculated with TAMB = 25C, TJunction =150C and RthJA = 250C/W for the SOT23-5 package RthJC = 81C/W for the SOT23-5 package 2. Pdiss has been calculated with TAMB = 25C, TJunction =150C and RthJA = 250C/W for the SOT23-5 package RthJC = 81C/W for the SOT23-5 package Table 2. Symbol TOPER VCC ISINK Operating conditions Parameter Operating temperature range Supply voltage Output sink current Value -40 to +85 1.7 to 10 up to 20 Unit C V mA 2/8 Typical Application Schematic TS4436 2 Typical Application Schematic Figure 1. SMPS power supply: secondary side Vout C1 D1 D2 L1 R1 4 Vcc Sink TS4436 3 R2 Cd1 100nF Vref 1 2 Gnd Pgnd Ref R3 5 3/8 Electrical Characteristics TS4436 3 Electrical Characteristics Table 3. Symbol Vref Electrical characteristics for Tamb = 25C, VCC = 1.8V, ISINK = 2mA unless otherwise specified Parameter Reference voltage TS4436A 0.5% Reference voltage TS4436 1% Temperature coefficient Change in Vref due to change in V CC Change in Vref due to change in ISINK Supply current Change in Iref Reference input current due to change in ISINK VCC=1.7 to 10V -40C < T < +85C ISINK=0.1 to 20mA -40C < T < +85C ISINK=2mA -40C < T < +85C 0.1< ISINK < 10mA -40C < T < +85C ISINK=5mA 30 20 150 1 2 3.5 Test Conditions Min. 0.597 -40C < T < +85C 0.589 0.594 -40C < T < +85C 0.589 0.6 0.6 Typ. 0.6 Max. 0.603 V 0.611 0.606 V 0.611 150 2.5 mV 3 7 mV 10 200 250 50 nA 65 50 60 mV ISINK=20mA -40C < T < +85C 90 120 140 0.05 A 0.1 A ppm/C Unit Vref TC RegLine RegLoad ICC IREF VSAT Output transistor saturation voltage -40C < T < +85C IOH Output leakage current VSINK=V CC -40C < T < +85C Note: Limits are 100% production tested at 25C. Limits over temperature are guaranteed through correlation and by design. 4/8 Electrical Characteristics Figure 2. 0.602 0.6015 Vref (V) TS4436 Figure 3. 0.602 0.6015 0.601 0.6005 0.6 0.5995 Vref vs. temperature Vref vs. temperature Vref (V) 0.601 0.6005 0.6 0.5995 -40 -20 0 25 50 85 Temperature (C) Vcc=1.8V Isink=2mA -40 -20 0 25 50 85 Temperature (C) Vcc=10V Isink=2mA Vcc=1.7V Isink=2mA Figure 4. 250 ICC vs. temperature Figure 5. 60 Number of product 50 40 30 20 10 0 ICC at 25C 200 Icc (A) 150 100 50 0 -40 -20 0 25 50 85 Temperature (C) Vcc=1.8V Isink=2mA Icc < 160 Icc < 165 Icc < 170 Icc < 175 Icc range (A) Vcc=1.8V Isink=2mA Figure 6. 80 70 60 Vsat (mV) 40 30 20 10 0 50 VSAT vs. temperature Figure 7. 0.612 0.61 0.608 0.606 0.604 0.602 0.6 0.598 0.596 0.594 Vref vs. temperature -40 -20 0 25 50 85 Vref (V) -40 -20 0 25 50 85 Temperature (C) Vcc=1.8V Isink=20mA Vcc=1.8V Isink=5mA Temperature (C) Vcc=1.8V Isink 0.1mA Vcc=1.8V Isink 20mA 5/8 Package Mechanical Data TS4436 4 Package Mechanical Data In order to meet environmental requirements, ST offers these devices in ECOPACK(R) 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.st.com. SC70 Package SOT323-5L MECHANICAL DATA mm. DIM. MIN. A A1 A2 b C D E E1 e e1 L 0.10 0.80 0.00 0.80 0.15 0.10 1.80 1.80 1.15 0 .65 1.3 0.30 3.9 TYP MAX. 1.10 0.10 1.00 0.30 0.18 2.20 2.40 1.35 MIN. 31.5 0.0 31.5 5.9 3.9 70.9 70.9 45.3 25.6 51.2 11.8 TYP. MAX. 43.3 3.9 39.4 11.8 7.1 86.6 94.5 53.1 mils 6/8 TS4436 Revision History 5 Revision History Table 4. Date Feb. 2006 Document revision history Revision 1 First release of datasheet. Changes 7/8 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. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST'S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZE REPRESENTATIVE OF ST, ST PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS, WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY, DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. (c) 2006 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 8/8 |
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