19-2090; Rev 2; 4/04 0.1%, 25ppm, SC70 Shunt Voltage Referencewith Multiple Reverse Breakdown VoltagesMAX6138General DescriptionFeatures The MAX6138 is a precision, two-terminal shunt mode, ♦ Ultra-Small 3-Pin SC70 Package bandgap voltage reference available in fixed reverse ♦ 0.1% (max) Initial Accuracy breakdown voltages of 1.2205V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V, and 5.0V. Ideal for space-critical applica- ♦ 25ppm/°C (max) Temperature Coefficient tions, the MAX6138 is offered in the subminiature 3-pin Guaranteed Over -40°C to +85°C Temperature SC70 surface-mount package (1.8mm X 1.8mm), 50% Range smaller than comparable devices in SOT23 surface- mount packages. ♦ Wide Operating Current Range: 60µA to 15mA Laser-trimmed resistors ensure precise initial accuracy. ♦ Low 28µVRMS Output Noise (10Hz to 10kHz) With a 25ppm/°C temperature coefficient, the device is ♦ 1.2205V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V, and 5.0V offered in three grades of initial accuracy ranging from Fixed Reverse Breakdown Voltages 0.1% to 0.5%. The MAX6138 has a 60µA to 15mA shunt- current capability with low-dynamic impedance, ensuring ♦ No Output Capacitors Required stable reverse breakdown voltage accuracy over a wide ♦ Stable with Capacitive Loads range of operating temperatures and currents. The MAX6138 does not require an external stabilizing Selector Guide capacitor while ensuring stability with capacitive loads. OUTPUT The MAX6138 is a higher precision device in a smaller TEMPPIN-PARTVOLTAGE package than the LM4040/LM4050. RANGEPACKAGE(V)Applications MAX6138_EXR12-T -40°C to +85°C 3 SC70-3 1.2205 Portable, Battery-Powered Equipment MAX6138_EXR21-T -40°C to +85°C 3 SC70-3 2.0480 Notebook Computers MAX6138_EXR25-T -40°C to +85°C 3 SC70-3 2.5000 MAX6138_EXR30-T -40°C to +85°C 3 SC70-3 3.0000 Cell Phones MAX6138_EXR33-T -40°C to +85°C 3 SC70-3 3.3000 Industrial Process Control MAX6138_EXR41-T -40°C to +85°C 3 SC70-3 4.0960 MAX6138_EXR50-T -40°C to +85°C 3 SC70-3 5.0000 Ordering Information appears at end of data sheet.Typical Operating Circuit VS Pin Configuration R I S SHUNT + ILOAD TOP VIEW ILOAD VR + 1 3 N.C.* I MAX6138 SHUNT - 2 MAX6138 SC70 *PIN 3 MUST BE LEFT FLOATING OR CONNECTED TO PIN 2. ________________________________________________________________ Maxim Integrated Products1For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.