LM136-5.0/LM236-5.0/LM336-5.0 5.0V Reference Diode General Description The LM136-5.0/LM236-5.0/LM336-5.0 integrated circuits are precision 5.0V shunt regulator diodes. These monolithic IC voltage references operate as a low temperature coefficient 5.0V zener with 0.6Ω dynamic impedance. A third terminal on the LM136-5.0 allows the reference voltage and temperature coefficient to be trimmed easily. The LM136-5.0 series is useful as a precision 5.0V low voltage reference for digital voltmeters, power supplies or op amp circuitry. The 5.0V makes it convenient to obtain a stable reference from low voltage supplies. Further, since the LM136-5.0 operates as a shunt regulator, it can be used as either a positive or negative voltage reference. The LM136-5.0 is rated for operation over −55˚C to +125˚C while the LM236-5.0 is rated over a −25˚C to +85˚C temperature range. The LM336-5.0 is rated for operation over a 0˚C to +70˚C temperature range. See the connection diagrams for available packages. For applications requiring 2.5V see LM136-2.5. Features n n n n n n n n n Adjustable 4V to 6V Low temperature coefficient Wide operating current of 600 µA to 10 mA 0.6Ω dynamic impedance ± 1% initial tolerance available Guaranteed temperature stability Easily trimmed for minimum temperature drift Fast turn-on Three lead transistor package Connection Diagrams TO-92 Plastic Package DS005716-4 Bottom View Order Number LM236AZ-5.0, LM336Z-5.0 or LM336BZ-5.0 See NS Package Number Z03A TO-46 Metal Can Package DS005716-5 Bottom View Order Number LM136H-5.0, LM136H-5.0/883, LM236H-5.0, LM136AH-5.0, LM136AH-5.0/883, or LM236AH-5.0 See NS Package Number H03H © 1999 National Semiconductor Corporation DS005716 www.national.com LM136-5.0/LM236-5.0/LM336-5.0 5.0V Reference Diode June 1999 Connection Diagrams (Continued) SO Package DS005716-7 Order Number LM336M-5.0 or LM336BM-5.0 See NS Package Number M08A Typical Applications 5.0V Reference 5.0V Reference with Minimum Temperature Coefficient Trimmed 4V to 6V Reference with Temperature Coefficient Independent of Breakdown Voltage DS005716-1 DS005716-3 * Does not affect temperature coefficient DS005716-15 † Adjust to 5.00V * Any silicon signal diode www.national.com 2 Absolute Maximum Ratings (Note 1) LM336-5.0 0˚C to +70˚C Soldering Information TO-92 Package (10 sec.) 260˚C TO-46 Package (10 sec.) 300˚C SO Package Vapor Phase (60 sec.) 215˚C Infrared (15 sec.) 220˚C See AN-450 “Surface Mounting Methods and Their Effect on Product Reliability” (appendix D) for other methods of soldering surface mount devices. If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Reverse Current Forward Current Storage Temperature Operating Temperature Range (Note 2) LM136-5.0 LM236-5.0 15mA 10mA −60˚C to +150˚C −55˚C to +150˚C −25˚C to +85˚C Electrical Characteristics (Note 3) LM136A-5.0/LM236A-5.0 Parameter Conditions Min Reverse Breakdown Voltage Reverse Breakdown Change With Current Reverse Dynamic Impedance Temperature Stability (Note 4) Typ Max LM336-5.0 Min Typ Units Max TA = 25˚C, IR = 1 mA LM136-5.0/LM236-5.0/LM336-5.0 4.9 5.00 5.1 4.8 5.00 5.2 V LM136A-5.0/LM236A-5.0, LM336B-5.0 TA = 25˚C, 4.95 5.00 5.05 4.90 5.00 5.1 V 6 12 6 20 mV 0.6 1.2 0.6 2 Ω 4 12 mV −25˚C≤TA≤+85˚C (LM236-5.0) 7 18 mV −55˚C≤TA≤+125˚C (LM136-5.0) 20 36 mV 600 µA≤IR≤10 mA 6 17 6 1.6 0.8 600 µA≤IR≤10 mA TA = 25˚C, IR = 1 mA, f = 100 Hz VR Adjusted 5.00V IR = 1 mA, (Figure 2) 0˚C≤TA≤70˚C (LM336-5.0) Reverse Breakdown Change LM336B-5.0 LM136-5.0/LM236-5.0 24 mV 2.5 Ω With Current Adjustment Range Reverse Dynamic Impedance Long Term Stability Circuit of Figure 1 IR = 1 mA TA = 25˚C ± 0.1˚C, IR = 1 mA, t = 1000 hrs ±1 0.8 20 ±1 20 V ppm Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device beyond its specified operating conditions. Note 2: For elevated temperature operation, Tj max is: LM136 150˚C LM236 125˚C LM336 100˚C Thermal Resistance TO-92 TO-46 SO-8 θja (Junction to Ambient) 180˚C/W (0.4" Leads) 440˚C/W 165˚C/W 80˚C/W N/A 170˚C/W (0.125" Leads) θja (Junction to Case) N/A Note 3: Unless otherwise specified, the LM136-5.0 is specified from −55˚C≤TA≤+125˚C, the LM236-5.0 from −25˚C≤TA≤+85˚C and the LM336-5.0 from 0˚C≤TA≤+70˚C. Note 4: Temperature stability for the LM336 and LM236 family is guaranteed by design. Design limits are guaranteed (but not 100% percent production tested) over the indicated temperature and supply voltage ranges. These limits are not used to calculate outgoing quality levels. Stability is defined as the maximum charge in VREF from 25˚C to TA(min) or TA(max). 3 www.national.com Typical Performance Characteristics Reverse Voltage Change Zener Noise Voltage DS005716-17 Dynamic Impedance DS005716-19 DS005716-18 Response Time Reverse Characteristics DS005716-20 Temperature Drift DS005716-21 Forward Characteristics DS005716-23 DS005716-22 Application Hints If minimum temperature coefficient is desired, four diodes can be added in series with the adjustment potentiometer as shown in Figure 2. When the device is adjusted to 5.00V the temperature coefficient is minimized. Almost any silicon signal diode can be used for this purpose such as a 1N914, 1N4148 or a 1N457. For proper temperature compensation the diodes should be in the same thermal environment as the LM136-5.0. It is usually sufficient to mount the diodes near the LM136-5.0 on the printed circuit board. The absolute resistance of the network is not critical and any value from 2k to 20k will work. Because of the wide adjustment range, fixed resistors should be connected in series with the pot to make pot setting less critical. The LM136-5.0 series voltage references are much easier to use than ordinary zener diodes. Their low impedance and wide operating current range simplify biasing in almost any circuit. Further, either the breakdown voltage or the temperature coefficient can be adjusted to optimize circuit performance. Figure 1 shows an LM136-5.0 with a 10k potentiometer for adjusting the reverse breakdown voltage. With the addition of R1 the breakdown voltage can be adjusted without affecting the temperature coefficient of the device. The adjustment range is usually sufficient to adjust for both the initial device tolerance and inaccuracies in buffer circuitry. www.national.com 4 Application Hints (Continued) DS005716-9 FIGURE 1. LM136-5.0 with Pot for Adjustment of Breakdown Voltage (Trim Range = ± 1.0V Typical) DS005716-10 FIGURE 2. Temperature Coefficient Adjustment (Trim Range = ± 0.5V Typical) 5 www.national.com Typical Applications Precision Power Regulator with Low Temperature Coefficient DS005716-11 * Adjust for 6.25V across R1 5V Crowbar DS005716-12 Adjustable Shunt Regulator DS005716-13 www.national.com 6 Typical Applications (Continued) Bipolar Output Reference Linear Ohmmeter DS005716-25 5.0V Square Wave Calibrator DS005716-14 Op Amp with Output Clamped DS005716-26 10V Buffered Reference DS005716-24 DS005716-27 7 www.national.com Typical Applications (Continued) Wide Input Range Reference Low Noise Buffered Reference DS005716-29 DS005716-28 www.national.com 8 DS005716-16 Schematic Diagram 9 www.national.com Physical Dimensions inches (millimeters) unless otherwise noted TO-46 Metal Can Package (H) Order Number LM136H-5.0, LM136H-5.0/883, LM236H-5.0, LM136AH-5.0, LM136AH-5.0/883 or LM236AH-5.0 NS Package Number H03H Small Outline (SO-8) Package Order Number LM336M-5.0 or LM336BM-5.0 NS Package Number M08A www.national.com 10 LM136-5.0/LM236-5.0/LM336-5.0 5.0V Reference Diode Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Plastic Package (Z) Order Number LM236AZ-5.0, LM336Z-5.0 or LM336BZ-5.0 NS Package Number Z03A LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. 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