TS4436ICT

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). 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. 1 PGND 2 GND 3 SINK REF 5 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 March 2006 Accuracy Temperature Range Package Packing -40, +85°C SC70 Tape & Reel 0.5% Marking L22 1% L21 Revision 1 1/8 www.st.com 8 Absolute Maximum Ratings and Operating Conditions 1 TS4436 Absolute Maximum Ratings and Operating Conditions Table 1. Key parameters and their absolute maximum ratings Symbol Parameter Value Unit ISINK Output sink current 30 mA VCC Supply voltage 12 V VSINK Output voltage 12 V Power Dissipation (1)SOT23-5 Pdiss Power Dissipation (2)SC70 TSTD Storage Temperature Pdiss mW 310 mW -65 to +150 °C 2 kV Machine Model (MM) 200 V Lead Temperature (soldering, 10 seconds) 250 °C Value Unit Operating temperature range -40 to +85 °C VCC Supply voltage 1.7 to 10 V ISINK Output sink current up to 20 mA Human Body Model (HBM) ESD TLEAD 1. Pdiss has been calculated with TAMB = 25°C, TJunction =150°C and RthJA = 250°C/W for the SOT23-5 package RthJC = 81°C/W for the SOT23-5 package 2. Pdiss has been calculated with TAMB = 25°C, TJunction =150°C and RthJA = 250°C/W for the SOT23-5 package RthJC = 81°C/W for the SOT23-5 package Table 2. Operating conditions Symbol TOPER 2/8 Parameter Typical Application Schematic 2 TS4436 Typical Application Schematic Figure 1. SMPS power supply: secondary side Vout L1 D1 D2 C1 R1 4 Vcc Sink 3 R2 TS4436 Cd1 100nF Vref 1 2 3/8 Gnd Pgnd Ref 5 R3 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=0.1 to 20mA 3.5 7 IREF Change in Iref Reference input current due to change in ISINK mV -40°C < T < +85°C ISINK=2mA 0.1< ISINK < 10mA Output leakage current ppm/°C mV 10 150 -40°C < T < +85°C Output transistor saturation voltage Unit V -40°C < T < +85°C 200 250 20 µA 50 nA -40°C < T < +85°C ISINK=5mA Note: Max. VCC=1.7 to 10V Supply current IOH Typ. Change in Vref due to change in V CC ICC VSAT Min. 65 30 -40°C < T < +85°C 50 60 mV ISINK=20mA 90 120 -40°C < T < +85°C 140 VSINK=V CC 0.05 -40°C < T < +85°C 0.1 µA Limits are 100% production tested at 25°C. Limits over temperature are guaranteed through correlation and by design. 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. 80 70 60 Vref (V) 50 40 30 20 10 0 -20 0 25 50 85 Temperature (°C) Vcc=1.8V Isink=20mA Icc < 175 Vcc=1.8V Isink=2mA VSAT vs. temperature -40 Icc < 170 Icc range (µA) Vcc=1.8V Isink=2mA Vsat (mV) 50 ICC at 25°C Temperature (°C) 5/8 25 0 -40 Figure 6. 0 Temperature (°C) Temperature (°C) Vcc=1.8V Isink=5mA Vref vs. temperature 0.612 0.61 0.608 0.606 0.604 0.602 0.6 0.598 0.596 0.594 -40 -20 0 25 50 85 Temperature (°C) Vcc=1.8V Isink 0.1mA Vcc=1.8V Isink 20mA 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.st.com. SC70 Package SOT323-5L MECHANICAL DATA mm. mils DIM. MAX. MIN. A MIN. 0.80 1.10 31.5 43.3 A1 0.00 0.10 0.0 3.9 A2 0.80 1.00 31.5 39.4 TYP. MAX. b 0.15 0.30 5.9 11.8 C 0.10 0.18 3.9 7.1 D 1.80 2.20 70.9 86.6 E 1.80 2.40 70.9 94.5 E1 1.15 1.35 45.3 53.1 e 0 .65 25.6 e1 1.3 51.2 L 6/8 TYP 0.10 0.30 3.9 11.8 TS4436 5 Revision History Revision History Table 4. Document revision history Date Revision Feb. 2006 1 Changes First release of datasheet. 7/8 TS4436 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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