A/AS535 2.5 V Precision Reference / Amplifier Features Description • Temperature-compensated: 50 ppm/°C • Trimmed 0.5% typical bandgap reference The AS535 is a three terminal adjustable shunt regulator utilizing an accurate 2.5V bandgap reference. The AS535 is functionally similar to an AS2431 except that the reference and amplifier operate off of a seperate supply from the output, allowing very low output voltges (0.1V Typically) • High gain Internal amplifier with 100 mA capability • Nominal temperature range extended to 105° C • Low frequency dynamic output impedance: < 150 mΩ • Low output noise Pin Configuration — Top view SOIC (D) VCC Because of its robust bipolar technology, the AS535 handles a wide range of current, and holds off up to 18V so its use is not limited to low power, low voltage systems. Significant care has been taken to provide adequate AC bandwidth to allow the AS535 as an amplifier in control systems and power electronics. ASTEC also offers a 1.0% version of this part, the A535. SOT-23-5 (DBV) 4L SIP (SIP) VOUT N/C N/C VREF N/C ANODE N/C N/C VOUT VCC ANODE VREF ANODE VREF VCC VOUT Ordering Information Description Temperature Range 8-Pin Plastic SOIC 0 to 105° C AS535D A535D 4-Pin Plastic SIP 0 to 105° C AS535SIP A535SIP SOT - 23 - 5 0 to 105° C AS535DBV A535DBV © ASTEC Semiconductor 25 0.5% Order Codes 1.0% A/AS535 2.5 V Precision Reference / Amplifier Functional Block Diagram Supply (Vcc) Output (VOUT) Reference (R) 2.5 V Absolute Maximum Ratings Anode (A) Parameter Symbol Rating Units Supply Voltage VCC 18 V Output Voltage VOUT 18 V Anode-VOUT Forward Current IAO 1 A Operating Output Current IOUT 100 mA Reference Input Current IREF 1 mA Continuous Power at 25° C PD 8L SOIC 750 mW 4L SIP 1000 mW SOT-23-5 200 mW Junction Temperature TJ 150 °C Storage Temperature TSTG – 65 to 150 °C TL 300 °C Lead Temperature (Soldering 10 sec.) Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Typical Thermal Resistances Recommended Conditions Parameter Symbol Rating Unit Output Voltage VOUT -0.2 to 18 V Output Current IOUT 10 mA θJA θJC Typical Derating SOIC 175° C/W 45° C/W 5.7 mW/°C SIP 95° C/W 50° C/W 10.5 mW/°C SOT-23-5 575° C/W 150° C/W 1.7 mW/°C Package ASTEC Semiconductor 26 2.5V Precision Reference / Amplifier A/AS535 Electrical Characteristics Electrical characteristics are guaranteed over the full junction temperature range (0-105 °C). Ambient temperature must be derated based upon power dissipation and package thermal characteristics. Unless otherwise stated, test conditions are: VOUT= VREF, VCC=5V and IOUT= 1 mA. A535 (1.0 %) Parameter Symbol Supply Voltage VCC Supply Current ICC Reference Voltage VREF Test Condition Typ Max Min 15 4 4 0.5 TJ = 25° C ∆VOUT Line Regulation Min AS535 (0.5 %) 1 -1 Max Units 15 V 1 mA 0. 5 2.475 2.500 2.525 VCC =4 to 15 V Typ 2.488 2.500 2.513 -10 -1 -10 V mV Load Regulation ∆VOUT IOUT = 1 to 100 mA 1 50 1 50 mV Temperature Deviation ∆VOUT 0 < TJ < 105° C 3 10 3 8 mV 0.1 0.4 0.1 0.4 µA Reference Input Current IREF Amplifier open loop gain Av Amplifier Unity gain frequency F1 CLOAD < 1nF Output Saturation Voltage VSAT IOUT =100mA Off State Leakage ILEAK 70 1 80 70 2 1 80 dB 2 MhZ 0.4 VREF = 0 V, VOUT = 15 V 0.04 0.4 500 0.04 500 V nA *Temperature deviation is defined as the maximum deviation of the reference over the given temperature range and does not imply an incremental deviation at any given temperature. Typical Performance Curves 0 mV % ppm *Calculating Average Temperature Coefficient (TC) 0 0 ∆VREF • TC in mV/°C = ∆VREF 2000 0.2 -5 • TC in %/°C = ( (mV) ∆TA ∆T ∆VREF VREF at 25° C ) x 100 ∆TA -10 0 15 30 45 60 Temperature (°C) 75 90 105 0.021 mV/°C 0.008 %/°C • TC in ppm/°C = 8.0 ppm/°C ASTEC Semiconductor ( ∆VREF VREF at 25° C ∆TA 27 ) x 106