MAX6120 19-0458 Rev 1 9/96 Low-Cost, Micropower, Precision, 3-Terminal, 1.2V Voltage Reference General Description Features The MAX6120 is the lowest-power 1.2V, precision, 3-Pin SOT23 Package three-terminal voltage reference offered in a SOT23 package. Ideal for 3V battery-powered equipment Supply Current Independent of Input Voltage where power conservation is critical, the MAX6120 is a Over Temperature low-power alternative to existing two-terminal shunt ref- erences. Unlike two-terminal references that throw 50A Supply Current away battery current and require an external series 2.4V to 11V Input Voltage Range resistor, the MAX6120 has a 70A maximum supply current (typically only 50A) that is independent of the 30ppm/C Typical Tempco (SOT23) input voltage. This feature translates to maximum effi- ciency at all battery voltages. 1% Initial Accuracy (SOT23) The MAX6120 operates from a supply voltage as low as 2.4V, and initial accuracy is 1% for the SOT23 pack- Ordering Information age. Output voltage temperature coefficient is typically only 30ppm/C, and is guaranteed to be less than 100ppm/C in the SOT23 package. For a guaranteed PART TEMP. RANGE PIN-PACKAGE output voltage temperature coefficient of less than MAX6120ESA -40C to +85C 8 SO 50ppm/C, see the MAX6520 data sheet. MAX6120EUR -40C to +85C 3 SOT23-3 Applications Battery-Powered Systems Portable and Hand-Held Equipment Data-Acquisition Systems Pin Configurations Instrumentation and Process Control TOP VIEW V 1 IN 3 GND MAX6120 Typical Operating Circuit V 2 OUT V+ SOT23 2.4V to 11V V IN V V OUT 1 8 IN MAX6120 V OUT 0.1F V OUT N.C. N.C. 1.2V 2 7 MAX6120 N.C. 3 6 N.C. GND 4 5 N.C. GND SO 0V Maxim Integrated Products 1 For free samples & the latest literature: Low-Cost, Micropower, Precision, 3-Terminal, 1.2V Voltage Reference ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) ..............................................-0.3V to +12V Operating Temperature Range ...........................-40C to +85C IN V ............................................................-0.3V to (V + 0.3V) Storage Temperature Range .............................-65C to +160C OUT IN Output Short-Circuit Duration ..........Continuous to Either Supply Lead Temperature (soldering, 10sec) .............................+300C Continuous Power Dissipation (T = +70C) A SOT23 (derate 4mW/C above +70C) ...........................320mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (V = 2.4V, I = 0mA, T = +25C, unless otherwise noted.) IN LOAD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS T = +25C 1.188 1.200 1.212 V A Output Voltage V MAX6120EUR (SOT23) OUT T = T to T 1.176 1.224 V A MIN MAX (Note 2) Output Voltage Temperature TCV MAX6120EUR (SOT23), T = T to T (Note 2) 30 100 ppm/C OUT A MIN MAX Coefficient 0.1Hz to 10Hz 10 Output Voltage Noise e Vp-p n 10Hz to 10kHz 400 Line Regulation V /V V = 2.4V to 11V, T = T to T (Note 1) 230 V/V OUT IN IN A MIN MAX Load Regulation V /I I = -50A to 400A (Note 1) 0.1 1 V/A OUT OUT LOAD T = +25C 50 58 A Quiescent Supply Current I A Q T = T to T (Note 1) 70 A MIN MAX Change in Supply Current I /V V = 2.4V to 11V 1.5 5 A/V Q IN IN vs. Input Voltage V shorted to GND 4.3 mA OUT Short-Circuit Output Current I SC V shorted to V 400 A OUT IN Note 1: Production testing done at T = +25C, over temperature limits guaranteed by parametric correlation data. A Note 2: Contact factory for availability of a higher-grade, lower-TC option in a SOT23 package. Typical Operating Characteristics (V = 3V, I = 0mA, T = +25C, unless otherwise noted.) IN LOAD A SUPPLY CURRENT OUTPUT VOLTAGE SUPPLY CURRENT vs. INPUT VOLTAGE vs. INPUT VOLTAGE vs. TEMPERATURE 80 1.20010 75 70 1.20005 70 V = 9V IN 65 1.20000 V = 5V IN 60 60 V = 3V IN 1.19995 55 50 50 1.19990 2394657 8 1011 243561718901 -50 -2505250 75 100 INPUT VOLTAGE (V) TEMPERATURE (C) INPUT VOLTAGE (V) 2 MAX6120 SUPPLY CURRENT (A) MAX6120 TOC-01 OUTPUT VOLTAGE (V) MAX6120-02 SUPPLY CURRENT (A) MAX6120 TOC-02