MAX6520 19-1130 Rev 1 7/05 50ppm/C, SOT23, 3-Terminal, 1.2V Voltage Reference General Description Features The MAX6520 is the lowest-power 1.2V, precision, 3-Pin SOT23 Package three-terminal voltage reference offered in a SOT23-3 package. Ideal for 3V battery-powered equipment 50ppm/C max Tempco where power conservation is critical, the MAX6520 is a Supply Current Independent of Input Voltage low-power alternative to existing two-terminal shunt ref- erences. Unlike two-terminal references that throw Over Temperature away battery current and require an external series 50A Supply Current resistor, the MAX6520 has a 70A maximum supply current (typically only 50A) that is independent of the 2.4V to 11V Input Voltage Range input voltage. This feature translates to maximum effi- ciency at all battery voltages. 1% Initial Accuracy The MAX6520 operates from a supply voltage as low as 2.4V, and initial accuracy is 1% for the SOT23 pack- age. Output voltage temperature coefficient is typi- cally only 25ppm/C, and is guaranteed to be less than 50ppm/C in the SOT23 package. Ordering Information Applications PIN- TOP PART TEMP RANGE Battery-Powered Systems PACKAGE MARK MAX6520EUR-T -40C to +85C3 SOT23-3 EFAA Portable and Hand-Held Equipment *Contact factory for availability. Data-Acquisition Systems Instrumentation and Process Control Typical Operating Circuit Pin Configuration V+ 2.4V to 11V TOP VIEW V IN V 1 IN MAX6520 V OUT 0.1F V OUT 3 GND MAX6520 1.2V 2 V OUT SOT23 GND 0V Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.50ppm/C, SOT23, 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, 10s) .................................+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 MAX6520EUR OUT T = T to T 1.176 1.224 V A MIN MAX Output Voltage Temperature TCV MAX6520EUR, T = T to T 25 50 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 Typical Operating Characteristics (V = 3V, I = 0mA, T = +25C, unless otherwise noted.) IN LOAD A SUPPLY CURRENT SUPPLY CURRENT SUPPLY CURRENT vs. TEMPERATURE vs. INPUT VOLTAGE vs. TEMPERATURE 75 80 75 70 70 70 V = 9V IN V = 9V IN 65 65 V = 5V IN V = 5V 60 IN 60 60 V = 3V IN V = 3V IN 55 55 50 50 50 -50 -2505250 75 100 2394657 8 1011 -50 -2505250 75 100 TEMPERATURE (C) INPUT VOLTAGE (V) TEMPERATURE (C) 2 MAX6520 SUPPLY CURRENT (A) MAX6520 TOC-01 SUPPLY CURRENT (A) MAX6520 TOC-02 SUPPLY CURRENT (A) MAX6520 TOC-02