FIXED 2.5 AND 5 VOLT 3-TERMINAL VOLTAGE REFERENCES ZTR250 ZTR500 ISSUE 4 - MARCH 1998 DEVICE DESCRIPTION FEATURES 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 30µA 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 -55°C to 125°C operating range. 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 (30µA) 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 125°C -65 to 150°C Power Dissipation (Tamb= 25°C, 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=125°C. 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=25°C, IO=10mA, Vin=6.5V SYMBOL PARAMETER VO CONDITIONS Output Voltage MIN. TYP. MAX. UNITS 2.438 2.5 2.563 V IO=0 to 50mA Tj=-55 to 125°C 2.360 2.640 V Vin=4.5 to 20V IO=0 to 50mA Tj=-55 to 125°C 2.360 2.640 V ∆VO Line Regulation Vin=4.5 to 20V 5 15 mV ∆VO Load Regulation IO=0 to 50mA IO=0 to 10mA 20 12 30 mV mV Supply Current Tj=-55 to 125°C 30 40 µA ∆ls Supply Current Change IO=0 to 50mA Vin=4.5 to 20V 1 2 ±10 10 µA µA Vn Output Noise Voltage f=10Hz to 10kHz 65 µV (rms) 55 75 dB 4.2 3.9 V ls ∆Vin/∆VO Ripple Rejection Vin ∆VO/∆T Vin=6.3 to 18V f=120Hz Input Voltage Required To Maintain Regulation Average Temperature Coefficient of VO IO=5.0mA Tj=-55 to 125°C 4-389 0.275 0.700 mV/°C ZTR250 ZTR500 ZTR500 ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=10mA, Vin=10V SYMBOL PARAMETER VO CONDITIONS Output Voltage MIN. TYP. MAX. UNITS 4.875 5 5.125 V IO=0 to 50mA Tj=-55 to 125°C 4.780 5.160 V Vin=7 to 20V IO=0 to 50mA Tj=-55 to 125°C 4.780 5.175 V ∆VO Line Regulation Vin=7 to 20V 5 15 mV ∆VO Load Regulation IO=0 to 50mA IO=0 to 10mA 25 15 40 mV mV Supply Current Tj=-55 to 125°C 50 70 µA ∆ls Supply Current Change IO=0 to 50mA Vin=7 to 20V 1 2 ±10 10 µA µA Vn Output Noise Voltage f=10Hz to 10kHz 90 ls ∆Vin/∆VO Ripple Rejection Vin ∆VO/∆T Vin=8 to 18V f=120Hz Input Voltage Required To Maintain Regulation Average Temperature Coefficient of VO 55 4-390 72 dB 7 IO=5.0mA Tj=-55 to 125°C µV (rms) 6.7 0.275 V 0.700 mV/°C ZTR250 ZTR500 TYPICAL CHARACTERISTICS a=ZTR250: b=ZTR500 5.02 60 Supply Current (µA) Output Voltage 5.00 Io=10mA Io=5mA Vin=Vo+4 b 4.98 4.96 2.52 Io=5mA Vin=Vo+4 2.50 b 50 40 a 30 20 2.48 10 2.46 a -50 -25 0 25 50 0 75 100 125 2 4 Temperature (°C) 6 10 12 14 16 18 8 20 Input Voltage (V) Output Voltage Temperature Supply Current v Voltage 60 Io=0 Vin=Vo+4 Supply Current (µA) Supply Current (µA) 34 32 30 a 28 Io=0 Vin=Vo+4 56 52 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 Supply Current v Temperature 2.5 49 Io=10mA b Io=0 Vin=Vo+4 48 Drop-Out Voltage (V) Supply Current (µA) 50 47 30 29 a 28 Io=0 Vin=Vo+4 27 0.1 1 10 2.0 b 1.5 a 1.0 0.5 0 100 -50 -25 Output Current 0 25 50 75 100 125 Temperature (°C) Supply Current v Output Current Drop-Out Voltage v Temperature 4-391 ZTR250 ZTR500 TYPICAL CHARACTERISTICS a=ZTR250: b=ZTR500 90 I O= 10mA I o= 2mA VIN = VOUT+ 4V 80 Ripple Rejection (dB) Output Impedance (Ohms) 10 1.0 a b 0.1 Io = 10mA 70 a b 60 50 40 30 20 10 0 10 0.01 100 1K 100K 10K 100 0mA 0.4 a 0 COUT=0 VIN=Vo+4 dIo/dt=1A/µs -0.4 b Output Voltage Deviation (V) Output Voltage Deviation (V) 5mA Load Current 0 -0.4 40 20 0 80 60 100K 5V Vin 0V 0.4 a 0 COUT=0 VIN=Vo+4 dVIN/dt=5V/µs 0.4 -0.4 100 0 10 20 30 40 Line Transient Response 800 2 Surface Mount Devices Through Hole Device TO92 Power Dissipation (mW) SOT89 1 SOT23 600 400 200 0 0 -25 0 25 50 50 Time (µs) Load Transient Response -50 -0.4 b 0 Time (µs) Power Dissipation (mW) 10K Ripple Rejection v Ripple Frequency Output Impedance v Frequency 0.4 1K Ripple Frequency (Hz) Frequency (Hz) 75 100 125 -50 Temperature (°C) -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 Tol % Package Part Mark ZTR250C02 2.5 TO92 ZTR25002 ZTR250F02 2.5 SOT23 25U ZTR250Z02 2.5 SOT89 25U ZTR500C02 2.5 TO92 ZTR50002 ZTR500F02 2.5 SOT23 50N ZTR500Z02 2.5 SOT89 50N 4-393