LM236 LM336,B 2.5V VOLTAGE REFERENCES ■ LOW TEMPERATURE COEFFICIENT ■ WIDE OPERATING CURRENT OF 400µA TO 10mA ■ 0.2Ω DYNAMIC IMPEDANCE Z TO92 (Plastic Package) ■ GUARANTEED TEMPERATURE STABILITY ■ FAST TURN-ON D SO8 (Plastic Micropackage) DESCRIPTION ORDER CODE The LM236 and LM336 are precision 2.5V regulator diodes. These voltage reference monolithic ICs operate like 2.5V zener diodes with a low temperature coefficient and a dynamic impedance of 0.2Ω. A third pin enables adjusting the reference voltage and the temperature coefficient. Package Temperature Range Part Number LM236 LM336,B -25°C, +85°C 0°C, +70°C Z D • • • • Z = TO92 Plastic package - also available in Bulk (Z), Tape & Reel (ZT) and Ammo Pack (AP) D = Small Outline Package (SO) - also available in Tape & Reel (DT) PIN CONNECTIONS (top view) SO8 (Top view) TO92 (Top view) ADJ v+ v- V+ NC NC ADJ 8 7 6 5 2 3 4 NC NC 1 NC May 2003 12345678- NC NC NC VADJ NC NC V+ V+ 1/10 LM236 - LM336,B SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol IR IF Toper TStg Parameter LM236 LM336,B Current Reverse Forward Unit 15 10 Operating Free-air Temperature Range mA -25 to +85 Storage Temperature Range 0 to +70 °C -65 to +150 °C ELECTRICAL CHARACTERISTICS LM236 Symbol LM336,B Parameter Unit Min. Typ. Max. Min. Typ. Max. 2.44 2.49 2.54 2.39 2.44 2.49 2.49 2.59 2.54 V Reverse Breakdown Voltage Change with Current 400µA ≤ IR ≤ 10mA Tamb = +25°C Tmin. ≤ Tamb ≤ Tmax. 2.6 3 6 10 2.6 3 10 12 mV ZD Reverse Dynamic Impedance (IR = 1mA) Tamb = +25°C Tmin. ≤ Tamb ≤ Tmax. 0.2 0.4 0.6 1 0.2 0.4 1 1.4 Ω KVT Temperature Stability (VR = 2.49V, IR = 1mA) 3.5 9 1.8 6 mV KVH Long Term Stability (Tamb = +25°C ±0.1°C, IR= 1mA) 20 VR ∆VR 2/10 Reference Breakdown Voltage Tamb = +25°C, IR = 1mA LM236, LM336 LM336B 20 ppm LM236 - LM336,B 3/10 LM236 - LM336,B APPLICATION HINTS The LM236, LM336 voltage references are easier to use than zener diodes. Their low impedance and wide current range facilitate biasing in any circuits. Besides, the breakdown voltage or the temperature coefficient can be adjusted so as to optimize the performance of the circuit. Figure 1 represents a LM336 with a 10kΩ potentiometer to adjust the reverse breakdown voltage which can be adjusted without altering the temperature coefficient of the circuit. The adjustment range is generally sufficient to adjust the initial tolerance of the circuit and the inaccuracy of the amplifier circuit. To obtain a lower temperature coefficient two diodes can be connected in series as indicated in Figure 2. When the circuit is adjusted to 2.49V the temperature coefficient is minimized. For a correct temperature coefficient, the diodes should be at the same ambient temperature as the LM336. The value of R1 is not critical (2-20kΩ). 4/10 LM236 - LM336,B 5/10 LM236 - LM336,B 6/10 LM236 - LM336,B 7/10 LM236 - LM336,B PACKAGE MECHANICAL DATA SO-8 MECHANICAL DATA DIM. mm. MIN. TYP inch MAX. MIN. TYP. MAX. A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.04 0.010 A2 1.10 1.65 0.043 0.065 B 0.33 0.51 0.013 0.020 C 0.19 0.25 0.007 0.010 D 4.80 5.00 0.189 0.197 E 3.80 4.00 0.150 0.157 e 1.27 0.050 H 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 k ddd 8˚ (max.) 0.1 0.04 0016023/C 8/10 LM236 - LM336,B PACKAGE MECHANICAL DATA - TO92 TAPE AMMO PACK & TO92 TAPE & REEL TO-92 MECHANICAL DATA DIM. AL A T d I1 P PO P2 F1/F2 D h D P W W0 W1 W2 H H0 H1 DO L1 MIN. mm. TYP MAX. 5.0 5.0 4.0 MIN. 0.45 2.5 11.7 12.4 5.95 2.4 -1 -1 17.5 5.7 8.5 12.7 12.7 6.35 2.5 0 0 18.0 6 9 15.5 16 3.8 4.0 inches TYP. MAX. 0.197 0.197 0.157 0.018 13.7 13 6.75 2.8 1 1 19.0 6.3 9.75 0.5 20 16.5 25 4.2 11 0.098 0.461 0.488 0.234 0.094 -0.039 -0.039 0.689 0.224 0.335 0.500 0.500 0.250 0.098 0 0 0.709 0.236 0.354 0.610 0.630 0.150 0.157 0.539 0.512 0.266 0.110 0.039 0.039 0.748 0.248 0.384 0.020 0.787 0.650 0.984 0.165 0.433 Packing information are available at: http://www.st.com/stonline/prodpres/packages/stdlin.htm 9/10 LM236 - LM336,B PACKAGE MECHANICAL DATA - TO92 BULK TO-92 MECHANICA DATA mm. mils DIM. MIN. TYP MAX. MIN. TYP. MAX. A 4.32 4.95 170.1 194.9 b 0.36 0.51 14.2 20.1 D 4.45 4.95 175.2 194.9 E 3.30 3.94 129.9 155.1 e 2.41 2.67 94.9 105.1 e1 1.14 1.40 44.9 55.1 L 12.7 15.49 500.0 609.8 R 2.16 2.41 85.0 94.9 S1 0.92 1.52 36.2 59.8 W 0.41 0.56 16.1 22.0 0102782/C Packing information are available at: http://www.st.com/stonline/prodpres/packages/stdlin.htm Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics © 2003 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom http://www.st.com 10/10