ZTLV431 1.24V Cost effective shunt regulator Description Pin connections The ZTLV431 is a three terminal adjustable shunt regulator offering excellent temperature stability and output current handling capability up to 20mA. The output voltage may be set to any chosen voltage between 1.24 volts and 10 volts by selection of two external divider resistors. The ZTLV431 can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance. ZTLV431_F (SOT23) (top view) Ref 1 3 Anode Cathode 2 The ZTLV431 is available as standard as an A grade which has an initial tolerance of 1%; a B grade is planned with an initial tolerance of 0.5%, and all cover the -40C to 125C temperature range as standard. Features * Low voltage operation VREF = 1.24V * Temperature range -40 to 125C * Reference voltage tolerance at 25C * * 0.5% ZTLV431B * 1% ZTLV431A (top view) Ref 1 w vie 3 Anode Pre Cathode 2 Typical temperature drift * 4 mV (0C to 70C) * 6 mV (-40C to 85C) * 11mV (-40C to 125C) * 100A minimum cathode current * 0.25 typical output impedance * ZTLV431_FF (SOT23F) ZTLV431_E5 (SOT23-5) (top view) N/C 1 Adjustable output voltage 1.24V to 10V N/C 2 Opto-coupler linearization * Linear regulators * Improved Zener * Variable reference v Pre Cathode 3 Applications * 5 Anode iew 4 Ref Ordering information Tol. Order code ZTLV431AE5TA 1% ZTLV431AFTA ZTLV431AFFTA ZTLV431BE5TA 0.5% ZTLV431BFTA ZTLV431BFFTA Package Part mark Status (*) SOT23-5 SOT23 SOT23F SOT23-5 SOT23 SOT23F S1A S1A S1A S1B S1B S1B Preview Active Preview Preview Preview Preview Reel size 7" (180mm) 7" (180mm) 7" (180mm) 7" (180mm) 7" (180mm) 7" (180mm) Tape width (mm) 8 8 8 8 8 8 Quantity per reel 3,000 3,000 3,000 3,000 3,000 3,000 NOTES: (*) For availability of preview status devices contact your local Zetex sales representative Issue 2 - June 2006 (c) Zetex Semiconductors plc 2006 1 www.zetex.com ZTLV431 Absolute maximum ratings Cathode voltage (VKA) 10V Continuous cathode current (IKA) -20 to 20mA Reference input current range (IREF) -0.05 to 3mA Operating junction temperature -40 to 150C Storage temperature -55 to 150C Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for extended periods, may reduce device reliability. Unless otherwise stated voltages specified are relative to the ANODE pin. Package thermal data Package JA PDIS TA =25C SOT23-5 250C/W 500 mW SOT23 380C/W 330 mW SOT23F 160C/W 780 mW Recommended operating conditions Min. Max. Units VKA cathode voltage VREF 10 V IKA cathode current 0.1 15 mA TA operating ambient temperature range -40 125 C Issue 2 - June 2006 (c) Zetex Semiconductors plc 2006 2 www.zetex.com ZTLV431 Electrical characteristics (electrical characteristics over recommended operating conditions, TA = 25C, KKA = VREF, IKA = 10mA unless otherwise stated) Symbol VREF Parameter Conditions Reference voltage TA = -40 to 85C TA = -40 to 125C Min. Typ. Max. Units ZTLV431A 1.228 1.24 1.252 ZTLV431B 1.234 1.24 ZTLV431A 1.215 1.265 ZTLV431B 1.224 1.259 ZTLV431A 1.209 1.271 ZTLV431B 1.221 TA = 0 to 70C Deviation of reference TA = -40 to 85C VREF(dev) voltage over full temperature range TA = -40 to 125C 1.246 V 1.265 4 12 6 20 11 31 mV V REF ----------------V KA 6V Ratio of change in VKA from VREF to 10V reference voltage to the change in cathode IKA = 10mA voltage -1.5 -2.7 -1.5 -2.7 mV/V IREF Reference input current 0.1 0.5 A TA = 0 to 70C 0.05 0.3 IREF(dev) IKA = 10mA, IREF deviation over full R1 = 10k, temperature range R2 = OC TA = -40 to 85C 0.1 0.4 TA = -40 to 125C 0.15 0.5 IKMIN Minimum cathode current for regulation VKA = VREF TA = -40 to 125C 55 100 A IK(OFF) Off-state current VKA = 10V, VREF =0V 10 30 A zKA Dynamic output impedance VKA = VREF, f = <1kHz, IK = 0.1 to 15mA 0.25 0.4 IKA = 10mA, R1 = 10k., R2 = OC A Deviation of reference input voltage, VDEV, is defined as the maximum variation of the reference input voltage over the full temperature range. The average temperature coefficient of the reference input voltage, VREF is defined as: V DEV x 1000000 ppm V REF ------------- = ----------------------------------------Vmax C (T - T ) V REF 1 2 The dynamic output impedance, ZKA, is defined as: VK Z KA = --------- IK Vmin Vdev = Vmax - Vmin When the device is programmed with two externalresistors, R1 and R2, (fig 2) , the dynamic output impedance of the overall circuit, Z', is defined as: T1 Z = Z KA x ( 1 + R1 ------- ) R2 Issue 2 - June 2006 (c) Zetex Semiconductors plc 2006 3 Temperature T2 www.zetex.com ZTLV431 Typical characteristics IL IL VZ Input IZ Iref Vref Fig 1 - Test circuit for VZ = Vref Issue 2 - June 2006 (c) Zetex Semiconductors plc 2006 VZ Input R1 47nF R2 Input IZ Iref VZ IZOFF 47nF 47nF Vref Fig 2 - Test circuit for VZ > Vref 4 Fig 3 - Test circuit for for Off state current www.zetex.com ZTLV431 Intentionally left blank Issue 2 - June 2006 (c) Zetex Semiconductors plc 2006 5 www.zetex.com ZTLV431 Package outline - SOT23 L H N G D 3 leads M A B C K Dim. F Millimeters Inches Min. Max. Min. Max. A 2.67 3.05 0.105 0.120 B 1.20 1.40 0.047 C - 1.10 D 0.37 F 0.085 G Dim. Millimeters Inches Min. Max. Max. Max. H 0.33 0.51 0.013 0.020 0.055 K 0.01 0.10 0.0004 0.004 - 0.043 L 2.10 2.50 0.083 0.0985 0.53 0.015 0.021 M 0.45 0.64 0.018 0.025 0.15 0.0034 0.0059 N 0.95 NOM - - 1.90 NOM 0.075 NOM 0.0375 NOM - - - Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches Issue 2 - June 2006 (c) Zetex Semiconductors plc 2006 6 www.zetex.com ZTLV431 Package outline - SOT23F c D b e1 b e L1 L E E1 b A1 R A2 Dim. E2 Millimeters A Inches Min. Max. Min. Max. A 0.80 1.00 0.031 0.0394 A1 - 0.10 0.00 A2 0.06 0.16 b 0.39 c D Dim. Millimeters Inches Min. Max. Max. Max. E 2.30 2.50 0.0906 0.0984 0.0043 E1 1.50 1.70 0.0590 0.0669 0.0024 0.0006 E2 1.10 1.26 0.0433 0.0496 0.41 0.0153 0.0161 L 0.48 0.68 0.0189 0.0268 0.11 0.20 0.0043 0.0079 L1 0.39 0.41 0.0153 0.0161 2.80 3.00 0.1102 0.1181 R 0.05 0.15 0.0019 0.0059 e 0.95 ref 0.0374 ref O 0 12 0 12 e1 1.90 ref 0.7480 ref - - - - - Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches Issue 2 - June 2006 (c) Zetex Semiconductors plc 2006 7 www.zetex.com ZTLV431 Package outline - SOT23-5 DIM Millimeters Min. 0.90 0.00 0.90 0.20 0.09 2.70 2.20 1.30 A A1 A2 b C D E E1 e e1 L a Inches Max. 1.45 0.15 1.30 0.50 0.26 3.10 3.20 1.80 Min. 0.0354 0.00 0.0354 0.0078 0.0035 0.1062 0.0866 0.0511 0.95 REF 1.90 REF 0.10 0 Max. 0.0570 0.0059 0.0511 0.0196 0.0102 0.1220 0.1181 0.0708 0.0374 REF 0.0748 REF 0.60 30 0.0039 0 0.0236 30 Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches Europe Americas Asia Pacific Corporate Headquarters Zetex GmbH Streitfeldstrae 19 D-81673 Munchen Germany Zetex Inc 700 Veterans Memorial Highway Hauppauge, NY 11788 USA Zetex (Asia Ltd) 3701-04 Metroplaza Tower 1 Hing Fong Road, Kwai Fong Hong Kong Zetex Semiconductors plc Zetex Technology Park, Chadderton Oldham, OL9 9LL United Kingdom Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 europe.sales@zetex.com Telephone: (1) 631 360 2222 Fax: (1) 631 360 8222 usa.sales@zetex.com Telephone: (852) 26100 611 Fax: (852) 24250 494 asia.sales@zetex.com Telephone: (44) 161 622 4444 Fax: (44) 161 622 4446 hq@zetex.com For international sales offices visit www.zetex.com/offices Zetex products are distributed worldwide. For details, see www.zetex.com/salesnetwork This publication is issued to provide outline information only which (unless agreed by the company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contact or be regarded as a representation relating to the products or services concerned. The company reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service. Issue 2 - June 2006 (c) Zetex Semiconductors plc 2006 8 www.zetex.com