www.fairchildsemi.com LM336-2.5/LM336B-2.5 Programmable Shunt Regulator Features Description • • • • • The LM336-2.5/LM336B-2.5 integrated circuits are precision 2.5V shunt regulators. The monolithic IC voltage reference operates as a low temperature coefficient 2.5V zener with 0.2W dynamic impedance. A third terminal on the LM336-2.5/LM336B-2.5 allows the reference voltage and temperature coefficient to be trimmed easily. LM3362.5/LM336B-2.5 are useful as a precision 2.5V low voltage reference for digital voltmeters, power supplies or OP-AMP circuitry. The 2.5V makes it convenient to obtain a stable reference from low voltage supplies. Further, since the LM336-2.5/LM336B-2.5 operate as shunt regulators, they can be used as either a positive or negative voltage reference. Low Temperature Coefficient Guaranteed Temperature Stability 4mV Typical 0.2Ω Dynamic Impedance ±1.0% Initial Tolerance Available Easily Trimmed for Minimum Temperature Drift TO-92 1 1. Adj 2. + 3. - Internal Block Diagram 2 + R1 Q17 Q9 R5 R6 R7 Q8 C2 R4 Q7 Q16 C1 R8 Q10 Q2 1 Q15 R9 Q4 Q6 Q1 Q3 Q11 Q5 Q12 Q13 R2 Q14 ADJUST R10 Q18 R3 3 _ Rev. 1.0.1 ©2002 Fairchild Semiconductor Corporation LM336-2.5/LM336B-2.5 Absolute Maximum Ratings Parameter Symbol Value Unit Reverse Current IR 15 mA Forward Current IF 10 mA Operating Temperature Range LM336-2.5/LM336B-2.5 TOPR 0 ~ +70 °C Storage Temperature Range TSTG - 60 ~ +150 °C Electrical Characteristics (0°C < TA < +70°C, unless otherwise specified) Parameter 2 Symbol Reverse Breakdown Voltage VR Reverse Breakdown Change with Current ∆VR/∆IR Conditions LM336-2.5 LM336B-2.5 Unit Min. Typ. Max. Min. Typ. Max. 2.44 2.49 2.54 2.465 2.49 2.515 V TA = +25°C 400uA ≤ IR ≤ 10mA - 2.6 10 - 2.6 6 mV TA = +25°C IR = 1mA Reverse Dynamic Impedance ZD TA = +25°C IR = 1mA - 0.2 1 - 0.2 0.6 Ω Temperature Stability STT IR = 1mA - 1.8 6 - 1.8 6 mV Reverse Breakdown Change with Current ∆VR/∆IR 400uA ≤ IR ≤ 10mA - 3 12 - 3 10 mV Reverse Dynamic Impedance ZD IR = 1mA - 0.4 1.4 - 0.4 1.0 Ω Long Term Stability In Reference Voltage ST IR = 1mA - 20 - - 20 - ppm/Khr LM336-2.5/LM336B-2.5 Typical Performance Characteristics Figure 1. Reverse Voltage Change Figure 2. Reverse Characteristics Figure 3. Temperature Drift Figure 4. Forward Characteristics 3 LM336-2.5/LM336B-2.5 Mechanical Dimensions Package Dimensions in millimeters TO-92 +0.25 4.58 ±0.20 4.58 –0.15 Reverse Current (mA) ±0.10 14.47 ±0.40 0.46 1.27TYP [1.27 ±0.20] 1.27TYP [1.27 ±0.20] ±0.20 4 (0.25) +0.10 0.38 –0.05 1.02 ±0.10 3.86MAX 3.60 (R2.29) +0.10 0.38 –0.05 LM336-2.5/LM336B-2.5 Ordering Information Product Number LM336Z2.5 LM336BZ25 Package Operating Temperature TO-92 0°C to +70°C 5 LM336-2.5/LM336B-2.5 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 11/12/02 0.0m 001 Stock#DSxxxxxxxx 2002 Fairchild Semiconductor Corporation