ZTL431, ZTL432 Cost effective adjustable precision shunt regulator Description The ZTL431 and ZTL432 are three terminal adjustable shunt regulators offering excellent temperature stability and output current handling capability up to 100mA. The output voltage may be set to any chosen voltage between 2.5 and 20 volts by selection of two external divider resistors. The ZTL432 has the same electrical specifications as the ZTL431 but has a different pin out in SOT23 (F-suffix) and SOT23F (FF-suffix). The devices can be used as a replacement for zener diodes in many applications requiring an improvement in zener performance. These are functionally equivalent to the TL431/ TL432 except for maximum operation voltage, and have an ambient temperature range of -40 to 125C as standard. Features Applications * Temperature range ................ -40 to 125C * Opto-coupler linearization * Reference voltage tolerance at 25C * Linear regulators Both variants are available in 2 grades with initial tolerances of 1% and 0.5% for the A and B grades respectively. * 0.5% ..................................... B grade * Improved zener * 1% ......................................... A grade * Variable reference * Low output noise * 0.2 typical output impedance * Sink current capability ...... 1mA to 100mA * Adjustable output voltage ...... VREF to 20V Pin connections ZTL431_F SOT23 ZTL431_FF SOT23F ZTL432_F SOT23 ZTL432_FF SOT23F ZTL431_H6 SC70-6 (top view) (top view) (top view) Cathode 1 Ref 1 Cathode 1 3 Anode Ref 2 Issue 8 - April 2007 (c) Zetex Semiconductors plc 2007 3 Anode Cathode 2 * 2 iew5 v Pre REF 3 1 6 Anode * 4 NC www.zetex.com ZTL431, ZTL432 Ordering information Tol. 1% 0.5% Order code Pack Part mark Status* Reel Size Tape width (mm) ZTL431A 31A Active Concertina N/A 1500 Preview* 7", 180mm 8 3000 7", 180mm 8 3000 ZTL431ACSTZ TO92 ZTL431AE5TA SOT23-5 ZTL431AFFTA SOT23F 31A Active Active Quantity per reel ZTL431AFTA SOT23 31A 7", 180mm 8 3000 ZTL431AH6TA SC70-6 31A Preview * 7", 180mm 8 3000 ZTL431AZTA SOT89 31A Preview* 7", 180mm 12 1000 ZTL432AFFTA SOT23F 32A Active 7", 180mm 8 3000 ZTL432AFTA SOT23 32A Active 7", 180mm 8 3000 ZTL431BCSTZ TO92 ZTL431B Preview* Concertina N/A 1500 Preview* ZTL431BE5TA SOT23-5 31B 7", 180mm 8 3000 ZTL431BFFTA SOT23F 31B Preview* 7", 180mm 8 3000 ZTL431BFTA SOT23 31B Active 7", 180mm 8 3000 SC70-6 31B Preview * 7", 180mm 8 3000 SOT89 31B Preview* 7", 180mm 12 1000 ZTL432BFFTA SOT23F 32B Active 7", 180mm 8 3000 ZTL432BFTA SOT23 32B Active 7", 180mm 8 3000 ZTL431BH6TA ZTL431BZTA NOTES: * For availability of pre-production status devices contact your local Zetex representative Absolute maximum ratings Cathode voltage (VKA) .............................................................. 20V Continuous cathode current (IKA) ........................................ 150mA Reference input current range (IREF)..................... -50 A to 10mA 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, TJ = 150C TO92 SOT23 SOT23F SOT23-5 SOT89 160C/W 380C/W 138C/W 250C/W 125C/W 780mW 330mW 900mW 500mW 1000mW Issue 8 - April 2007 (c) Zetex Semiconductors plc 2007 2 www.zetex.com ZTL431, ZTL432 Recommended operating conditions VKA Cathode voltage Min Vref Max 20 Units V IKA Cathode current 1 100 mA TA Operating ambient temperature range -40 125 C Electrical characteristics Electrical characteristics over recommended operating conditions, TA = 25C, unless otherwise stated. Symbol Parameter VREF Reference voltage VDEV VREF VKA IREF IREF Conditions VKA = VREF IKA = 10mA ZTL43_A ZTL43_B Min. 2.475 2.487 Typ. 2.5 2.5 Max. 2.525 2.513 Units V Deviation of reference voltage over full VKA = VREF temperature range IKA = 10 mA TA = 0 to 70 6 16 TA = -40 to 85C 14 34 TA = -40 to 125C 14 34 Ratio of change in reference voltage to the change in cathode voltage Reference input current VKA = VREF to 10 -1.4 -2.7 VKA = 10V to 20V -1.0 -2.0 2 4 TA = 0 to 70C 0.8 1.2 TA = -40 to 85C 0.8 2.5 TA = -40 to 125C 0.8 2.5 0.4 0.6 mA 0.1 0.5 A 0.2 0.5 IKA = 10mA IKA = 10mA, R1 = 10k R2 = OC IKA = 10mA IREF deviation over full R1 = 10k temperature range R2 = OC IKA(MIN) Minimum cathode VKA = VREF current for regulation IKA(OFF) Off state current VKA = 20V, VREF = 0V Dynamic output VKA = VREF, f = 0Hz RZ impedance Issue 8 - April 2007 (c) Zetex Semiconductors plc 2007 3 mV mV/V A A www.zetex.com ZTL431, ZTL432 Typical characteristics IKA = 10mA VREF = VKA 125 Issue 8 - April 2007 (c) Zetex Semiconductors plc 2007 4 www.zetex.com ZTL431, ZTL432 Typical characteristics VKA IKA IKA VKA VKA VKA IKA VREF < VKA < 20, IKA = 10mA, TA = 25C Issue 8 - April 2007 (c) Zetex Semiconductors plc 2007 5 www.zetex.com ZTL431, ZTL432 Application cicuits V+ V+ VOUT VOUT R1 R1 VREF VREF R2 R2 VREF VOUT VREF VOUT Higher current shunt regulator Shunt regulator V+ ZSR*** V+ In VOUT Out 30 Common R1 0.01F VREF R1 VOUT R2 VREF R2 VOUT(MIN) = VREF + VREG VREF VOUT VOUT Output control of a three terminal fixed regulator VREF Series regulator V+ R1 V+ R1 Output VREF VON~ 2V VOFF = V+ R2a VREF Output Input VTH = 2.5V R2b VREF VREF Single supply comparator with temperature compensated threshold Issue 8 - April 2007 (c) Zetex Semiconductors plc 2007 Over voltage / under voltage protection circuit 6 www.zetex.com ZTL431, ZTL432 DC test circuits IL IL VKA IKA IKA IREF VKA IKA(OFF) IREF VREF VREF Figure 1 Test circuit for VKA = VREF VKA Figure 2 Test circuit for VKA > VREF Figure 3 Test circuit for off state current Notes 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 1, 000, 000 V REF ( ppmC ) = -----------------------------------------------V REF ( T1 - T2 ) The dynamic output impedance, Rz, is defined as: V R z = ---------zI z When the device is programmed with two external resistors, R1 and R2, (fig 2), the dynamic output impedance of the overall circuit, R'z, is defined as: R' z = R z 1 + R1 ------- R2 Stability boundary The ZTL431 and ZTL432 are stable with a range of capacitive loads. A zone of instability exists as demonstrated in the typical characteristic graph on page 5. The graph shows typical conditions. To ensure reliable stability a capacitor of 4.7nF or greater is recommended between anode and cathode. Issue 8 - April 2007 (c) Zetex Semiconductors plc 2007 7 www.zetex.com ZTL431, ZTL432 Pin connections - preview status devices ZTL431_Z SOT89 ZTL431_E5 SOT235 (top view) (top view) Cathode Anode ew vi Pre Anode Ref N/C 1 * 2 (underside view) Vz 1 Gnd 2 Vref 3 5 Anode w ie rev P Cathode 3 ZTL431_C TO92 4 Ref * Pin 2 should be left floating or connected to pin 5 Issue 8 - April 2007 (c) Zetex Semiconductors plc 2007 8 www.zetex.com ZTL431, ZTL432 Packaging details - SOT23 E Dim. Millimeters Inches Min. Max. Min. A e e1 b 3 leads L1 1.12 - Millimeters Min. 0.044 Inches Max. Max. Max. e1 1.90 NOM 0.075 NOM 0.083 0.104 A1 0.01 0.10 0.0004 0.004 E 2.10 2.64 b 0.30 0.50 0.012 0.020 E1 1.20 1.40 0.047 0.055 C 0.085 0.120 0.003 0.008 L 0.25 0.62 0.018 0.024 D 2.80 3.04 0.110 0.120 L1 0.45 0.62 0.018 0.024 e 0.95 NOM 0.0375 NOM - - - - - Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches D E1 - Dim. Max. A A1 L c Packaging details - SOT23-5 Dim. Millimeters Inches Min. Max. Min. Max. A 0.90 1.45 0.0354 0.0570 A1 0.00 0.15 0.00 0.0059 A2 0.90 1.30 0.0354 0.0511 0.0196 b 0.20 0.50 0.0078 C 0.09 0.26 0.0035 0.0102 D 2.70 3.10 0.1062 0.1220 E 2.20 3.20 0.0866 0.1181 E1 1.30 1.80 0.0511 0.0708 e 0.95 REF e1 0.0374 REF 1.90 REF 0.0748 REF L 0.10 0.60 0.0039 0.0236 a 0 30 0 30 Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches Issue 8 - April 2007 (c) Zetex Semiconductors plc 2007 9 www.zetex.com ZTL431, ZTL432 Package details - SOT89 Dim. Millimeters D A C D1 E H E1 e B1 Dim. Millimeters 1.40 1.60 0.550 0.630 Min. Max. E1 2.13 Inches Min Max. 2.29 0.084 0.090 B 0.44 0.56 0.017 0.022 e 1.50 BSC 0.059 BSC B1 0.36 0.48 0.014 0.019 e1 3.00 BSC 0.118 BSC C 0.35 0.44 0.014 0.019 H 3.94 4.25 0.155 0.167 D 4.40 4.60 0.173 0.181 L 0.89 1.20 0.155 0.167 E 2.29 2.60 0.090 0.102 - - - - Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches L B Inches Min. Max. Min. Max. A e1 Package details - TO92 Dim. C A Millimeters Inches Min. Max. Min. Max. 4.32 4.95 0.170 0.195 b 0.36 0.51 0.014 0.020 C 2.50 3.50 0.099 0.138 E 3.30 3.94 0.130 0.155 e 4.88 5.88 0.192 0.232 e1 2.44 2.94 0.096 0.116 L 12.70 15.49 0.500 0.610 0.095 R 2.16 2.41 0.085 S1 1.14 1.52 0.045 0.060 W 0.41 0.56 0.016 0.022 D 4.45 4.95 0.175 0.195 * 4 6 4 6 Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches Issue 8 - April 2007 (c) Zetex Semiconductors plc 2007 10 www.zetex.com ZTL431, ZTL432 Package details - SC70-6 Dim. Millimeters Min. Dim Millimeters Inches . Min. Max. Max. Max. Max. Max. 1.10 0.0315 0.0433 A 0.80 A1 - A2 0.80 1.00 0.0315 0.0394 b 0.15 0.30 C 0.08 0.25 0.0031 0.0098 D Inches Min. 0.10 2.00 BSC - E 0.0039 E1 2.10 BSC 1.25 0.0826 BSC 1.35 0.0492 0.0531 e 0.65 BSC 0.0255 BSC 0.006 0.0118 e1 1.30 BSC 0.0511 BSC 0.0787 BSC L 0.26 0 0.46 0.0102 0.0181 8 0 8 Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches Package details SOT23F c D b Dim. Millimeters e1 b e L1 A L A1 E E1 E2 b A1 0.80 1.00 0.031 0.0394 - 0.10 Dim. Millimeters Max. Inches Min. Max. Max. E 2.30 2.50 0.0906 0.0984 Max. 1.70 0.0590 0.0669 0.00 0.0043 E1 1.50 0.06 0.16 0.0024 0.0006 E2 1.10 1.26 0.0433 0.0496 0.39 0.41 0.0153 0.0161 L 0.48 0.68 0.0189 0.0268 c 0.11 0.20 0.0043 0.0079 L1 0.39 0.41 0.0153 0.0161 D 2.80 3.00 0.1102 0.1181 R 0.05 0.15 0.0019 0.0059 A2 b R Inches Min. Max. Min. e 0.95 ref 0.0374 ref O 0 12 0 12 e1 1.90 ref 0.7480 ref - - - - - A Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches Issue 8 - April 2007 (c) Zetex Semiconductors plc 2007 11 www.zetex.com ZTL431, ZTL432 Definitions Product change Zetex Semiconductors reserves the right to alter, without notice, specifications, design, price or conditions of supply of any product or service. Customers are solely responsible for obtaining the latest relevant information before placing orders. Applications disclaimer The circuits in this design/application note are offered as design ideas. It is the responsibility of the user to ensure that the circuit is fit for the user's application and meets with the user's requirements. No representation or warranty is given and no liability whatsoever is assumed by Zetex with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Zetex does not assume any legal responsibility or will not be held legally liable (whether in contract, tort (including negligence), breach of statutory duty, restriction or otherwise) for any damages, loss of profit, business, contract, opportunity or consequential loss in the use of these circuit applications, under any circumstances. Life support Zetex products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Zetex Semiconductors plc. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labelling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Reproduction The product specifications contained in this publication are 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 contract or be regarded as a representation relating to the products or services concerned. Terms and Conditions All products are sold subjects to Zetex' terms and conditions of sale, and this disclaimer (save in the event of a conflict between the two when the terms of the contract shall prevail) according to region, supplied at the time of order acknowledgement. For the latest information on technology, delivery terms and conditions and prices, please contact your nearest Zetex sales office. Quality of product Zetex is an ISO 9001 and TS16949 certified semiconductor manufacturer. To ensure quality of service and products we strongly advise the purchase of parts directly from Zetex Semiconductors or one of our regionally authorized distributors. For a complete listing of authorized distributors please visit: www.zetex.com/salesnetwork Zetex Semiconductors does not warrant or accept any liability whatsoever in respect of any parts purchased through unauthorized sales channels. ESD (Electrostatic discharge) Semiconductor devices are susceptible to damage by ESD. Suitable precautions should be taken when handling and transporting devices. The possible damage to devices depends on the circumstances of the handling and transporting, and the nature of the device. The extent of damage can vary from immediate functional or parametric malfunction to degradation of function or performance in use over time. Devices suspected of being affected should be replaced. Green compliance Zetex Semiconductors is committed to environmental excellence in all aspects of its operations which includes meeting or exceeding regulatory requirements with respect to the use of hazardous substances. Numerous successful programs have been implemented to reduce the use of hazardous substances and/or emissions. All Zetex components are compliant with the RoHS directive, and through this it is supporting its customers in their compliance with WEEE and ELV directives. Product status key: "Preview" Future device intended for production at some point. Samples may be available "Active" Product status recommended for new designs "Last time buy (LTB)" Device will be discontinued and last time buy period and delivery is in effect "Not recommended for new designs" Device is still in production to support existing designs and production "Obsolete" Production has been discontinued Datasheet status key: "Draft version" This term denotes a very early datasheet version and contains highly provisional information, which may change in any manner without notice. "Provisional version" This term denotes a pre-release datasheet. It provides a clear indication of anticipated performance. However, changes to the test conditions and specifications may occur, at any time and without notice. "Issue" This term denotes an issued datasheet containing finalized specifications. However, changes to specifications may occur, at any time and without notice. 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