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| FIXED 2.5 AND 5 VOLT 3-TERMINAL VOLTAGE REFERENCES ISSUE 4 - MARCH 1998 DEVICE DESCRIPTION The ZTR250 and ZTR500 are precision three terminal references. These devices are ideal for battery powered applications where power saving is important. They offer low power alternatives to other two terminal shunt references. The ZTR devices do not require an external resistor and, in contrast to two terminal references, waste none of the battery power as load current varies. The ZTR only consumes 30A supply current. The two devices require as low as 1.4 volts between input and output for regulation. Output voltage tolerance is 2.5%, with a voltage variation of 0.275mV/C over the -55C to 125C operating range. ZTR250 ZTR500 FEATURES * * * * * * * * * * * * * Small outline SOT23 and SOT89 packages TO92 package 2.5V and 5V output 2.5% tolerance Supply current independent of input voltage over temperature Output current up to 50mA Very low supply current (30A) Unconditionally stable Internal short circuit current limit APPLICATIONS Battery Powered Systems Portable and Hand Held Equipment Instrumentation Metering SCHEMATIC DIAGRAM Vin Vout Gnd 4-388 ZTR250 ZTR500 ABSOLUTE MAXIMUM RATINGS Input Voltage Output current (IO) Operating temperature Storage temperature 20V 200mA -55 to 125C -65 to 150C Power Dissipation (Tamb= 25C, Tjmax=150 C) SOT23 500mW TO92 600mW SOT89 1.5W Note: 1. The maximum operating input voltage and output current of the device will be governed by the maximum power dissipation of the selected package. Maximum package power dissipation is specified at 25 C and must be linearly derated to zero at Tamb=125C. 2. The following data represents pulse test conditions with junction temperatures as indicated at the initiation of the test. Continuous operation of the devices with the stated conditions might exceed the power dissipation limits of the chosen package. 3. This device does not contain a thermal shutdown circuit so care should be taken not to exceed the stated maximum power dissipation rating.Maximum power dissipation, for the SOT23 and SOT89 packages, is calculated assuming that the device is mounted on a ceramic substrate measuring 15 x 15 x 0.6mm. ZTR250 ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated):Tj=25C, IO=10mA, Vin=6.5V SYMBOL PARAMETER VO CONDITIONS IO=0 to 50mA Tj=-55 to 125C Vin=4.5 to 20V IO=0 to 50mA Tj=-55 to 125C MIN. 2.438 2.360 2.360 TYP. 2.5 MAX. 2.563 2.640 2.640 UNITS V V V Output Voltage VO VO ls ls Vn Line Regulation Load Regulation Supply Current Supply Current Change Output Noise Voltage Vin=4.5 to 20V IO=0 to 50mA IO=0 to 10mA Tj=-55 to 125C IO=0 to 50mA Vin=4.5 to 20V f=10Hz to 10kHz Vin=6.3 to 18V f=120Hz 5 20 12 30 1 2 65 15 30 40 10 10 mV mV mV A A A V (rms) dB V Vin/VO Ripple Rejection Vin VO/T 55 4.2 75 3.9 0.275 0.700 Input Voltage Required To Maintain Regulation Average Temperature Coefficient of VO IO=5.0mA Tj=-55 to 125C mV/C 4-389 ZTR250 ZTR500 ZTR500 ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated):Tj=25C, IO=10mA, Vin=10V SYMBOL PARAMETER VO CONDITIONS MIN. 4.875 TYP. 5 MAX. 5.125 5.160 5.175 UNITS V V V Output Voltage IO=0 to 50mA Tj=-55 to 125C Vin=7 to 20V IO=0 to 50mA Tj=-55 to 125C 4.780 4.780 VO VO ls ls Vn Line Regulation Load Regulation Supply Current Supply Current Change Output Noise Voltage Vin=7 to 20V IO=0 to 50mA IO=0 to 10mA Tj=-55 to 125C IO=0 to 50mA Vin=7 to 20V f=10Hz to 10kHz Vin=8 to 18V f=120Hz 55 5 25 15 50 1 2 90 72 15 40 70 10 10 mV mV mV A A A V (rms) dB Vin/VO Ripple Rejection Vin VO/T Input Voltage Required To Maintain Regulation Average Temperature Coefficient of VO IO=5.0mA Tj=-55 to 125C 7 6.7 0.275 0.700 V mV/C 4-390 ZTR250 ZTR500 TYPICAL CHARACTERISTICS a=ZTR250: b=ZTR500 5.02 5.00 b Io=5mA Vin=Vo+4 60 Io=10mA b Output Voltage 4.98 4.96 2.52 2.50 2.48 2.46 a -50 -25 0 25 50 75 100 125 Io=5mA Vin=Vo+4 Supply Current (A) 50 40 30 a 20 10 0 2 4 6 8 10 12 14 16 18 20 Temperature (C) Input Voltage (V) Output Voltage Temperature 60 34 Io=0 Vin=Vo+4 Supply Current v Voltage Supply Current (A) 32 Supply Current (A) 56 Io=0 Vin=Vo+4 52 30 a 28 48 b 44 26 40 -50 -25 0 25 50 75 100 125 -50 -25 0 25 50 75 100 125 Temperature (C) Temperature (C) Supply Current v Temperature 50 Supply Current v Temperature 2.5 Io=10mA Supply Current (A) 49 48 47 b Drop-Out Voltage (V) Io=0 Vin=Vo+4 2.0 b 1.5 a 1.0 30 29 28 27 0.1 1 10 a Io=0 Vin=Vo+4 100 0.5 0 -50 -25 0 25 50 75 100 125 Output Current Temperature (C) Supply Current v Output Current 4-391 Drop-Out Voltage v Temperature ZTR250 ZTR500 TYPICAL CHARACTERISTICS 10 90 I O= 10mA I o= 2mA VIN = V + 4V OUT a=ZTR250: b=ZTR500 Output Impedance (Ohms) 80 Io = 10mA a b Ripple Rejection (dB) 70 60 50 40 30 20 10 1.0 a 0.1 b 0.01 100 1K 10K 100K 0 10 100 1K 10K 100K Frequency (Hz) Ripple Frequency (Hz) Output Impedance v Frequency Ripple Rejection v Ripple Frequency Output Voltage Deviation (V) Load Current 0mA Output Voltage Deviation (V) 5mA 5V Vin 0V 0.4 a 0.4 a 0 COUT=0 VIN=Vo+4 dIo/dt=1A/s b 0 COUT=0 VIN=Vo+4 dVIN/dt=5V/s b -0.4 -0.4 0.4 0 0.4 0 -0.4 0 20 40 60 80 100 -0.4 0 10 20 30 40 50 Time (s) Time (s) Load Transient Response 2 800 Line Transient Response Surface Mount Devices Power Dissipation (mW) SOT89 TO92 Through Hole Device Power Dissipation (mW) 25 50 75 100 125 600 1 400 SOT23 200 0 -50 -25 0 Temperature (C) 0 -50 -25 0 25 50 75 100 125 Temperature (C) Power Derating Power Derating 4-392 ZTR250 ZTR500 CONNECTION DIAGRAMS SOT23 Package Suffix - F TO92 Package Suffix - C Top View Bottom View SOT89 Package Suffix - Z Top View ORDERING INFORMATION Part Number ZTR250C02 ZTR250F02 ZTR250Z02 ZTR500C02 ZTR500F02 ZTR500Z02 Tol % 2.5 2.5 2.5 2.5 2.5 2.5 Package Part Mark TO92 SOT23 SOT89 TO92 SOT23 SOT89 ZTR25002 25U 25U ZTR50002 50N 50N 4-393 |
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