CAT102 Precision, Adjustable Shunt Regulator (600 mV Reference) FEATURES DESCRIPTION 600 mV low voltage reference The CAT102 is a low-voltage reference and amplifier. Designed for the control loop of low-voltage power 6 mV initial accuracy supplies, the reference voltage has been designed for High PSRR: 45 dB at 300 kHz 600 mV. Over a temperature from -40C to 85C, the Better line regulation: 1 mV (V from 2.2 V to 18 V) reference voltage is within 8 mV of the nominal IN 600mV. In addition, the error amplifier output and the Low supply current: 90 A supply voltage pin (IN) are on separate pins. Open drain output Directly drives optocouplers Power supply rejection is a high 45 dB at 300 kHz. The output, OUT, can sink 20 mA at a maximum Industrial temperature range of -40C to 85C saturation voltage of 250 mV. RoHS-compliant 5-lead TSOT23 package When combined with an optocoupler, the CAT102 can APPLICATION be used as an error amplifier that controls the feedback loop in isolated low-output voltage switching SMPS control loop power supplies. Low temperature coefficient voltage reference Power management Replaces zener diodes Isolated DC-to-DC converters For Ordering Information details, see page 7. Network, telecom and cellular base station Adjustable voltage reference PIN CONFIGURATION FUNCTIONAL DIAGRAM TSOT-23 5L IN Top View OUT 3 5 FB 11 5 8 IN Error Amplifier 1 GND 22 FB + OUT 43 4 5 NC V REF + PIN DESCRIPTION 600mV Pin Name Function FB Inverting input to error amplifier 2 GND GND Ground Output of error amplifier. Source & sink OUT current capability is 20 mA. NC No connection IN Positive supply 2009 SCILLC. All rights reserved. 1 Doc. No. MD-4007 Rev. P Characteristics subject to change without notice CAT102 (1) ABSOLUTE MAXIMUM RATINGS Parameters Ratings Units V Voltage 20 V IN OUT Voltage 20 V FB Voltage 20 V V , OUT, FB Current 50 mA IN Operating Junction Temperature (10 seconds) 150 C Lead Soldering Temperature (10 seconds) 260 C Storage Temperature Range -65 to +150 C ELECTRICAL CHARACTERISTICS Electrical characteristics are guaranteed over the full operating temperature range of -40C to +85C unless otherwise specified. Ambient temperature must be de-rated based upon power dissipation and package thermal 1 characteristics. Unless otherwise stated, test conditions are V = 3 V, FB = OUT, I = 1 mA. IN OUT Symbol Parameter Conditions Min Typ Max Units V Supply Voltage Range 2.2 18 V IN I Quiescent Supply Current V =1 V 90 500 A IN OUT T = 25C 594 600 606 J V FB Threshold Reference Voltage mV FB -40C < T < 85C 592 608 J V = 2.2 V to V =18 V IN IN Line Regulation 0.5 1 mV V = 0.6 V OUT I = 1 mA to 10 mA OUT Load Regulation 3 8 mV V = 0.6 V OUT I FB Input Current -500 500 nA FB Reference Power Supply (3) PSRR Frequency = 300 kHz 35 65 dB Rejection A Error Amplifier Open Loop Gain I = 2 mA, V = 1 V 60 80 dB V OUT OUT (3) BW Unity Gain Frequency I = 2 mA, V = 1 V 1 2 MHz OUT OUT V Output Saturation voltage I = 20 mA, V = HIGH 130 250 mV OUT OUT FB (3) TRANSC Output Transconductance I = 1 mA to 20 mA 2.5 mA/mV OUT I Output Leakage Current V = 16 V, V = 0 0.5 2 A LEAK OUT FB I Maximum Output Current V = 0.3 V 20 mA OUT(MAX) OUT Notes: (1) These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolongued time periods may affect device reliability. All voltages are with respect to ground. (2) Thermal Characteristics ( ) of TSOT-23 5-lead: 255C/W JA (3) This parameter is controlled by design and verified during product evaluation. It is not production tested. Doc. No. MD-4007 Rev. P 2 2009 SCILLC. All rights reserved. Characteristics subject to change without notice