5 VOLT ENHANCED POSITIVE LOCAL VOLTAGE REGULATOR ZSAT500 ISSUE 1 - DECEMBER 1995 DEVICE DESCRIPTION The devices are suited to local voltage regulation applications, where problems could be encountered with distributed single source regulation, as well as more general voltage regulation applications. The ZSAT500 is an enhanced three terminal fixed positive 5 volt regulator. The device is designed particularly for use in Satellite receiver low noise blocks where a high degree of supply rejection is required to extended frequencies. The device has been improved to give superior performance with ripple rejection of 65dB up to 22KHz , and 40dB up to 200KHz. FEATURES • • The device features internal circuit current limit and thermal shutdown making it almost impossible to destroy. The ZSAT500 shows performance characteristics superior to other local voltage regulators. The initial output voltage is maintained to within 2.5% with a quiescent current of typically 350µA. Line and load regulation is superior to that of other devices, with load current up to a maximum 200mA. • • • • • • • • • For the LNB application the regulator is offered in a surface mount SOT223 package which permits power dissipation up to 3 watts. Additionally the device can be made available in an SO8 surface mount package, as well as TO92 for through hole application. Enhanced ripple rejection - 65dB at 22kHz Small outline SO8 and SOT223 packages TO92 package 5 volt output Output current upto 200mA Tight initial tolerance Low quiescent current -55 to 125°C temperature range No external components Internal thermal shutdown Internal short circuit current limit APPLICATIONS • • Satellite receivers Low noise blocks SCHEMATIC DIAGRAM Vin Q14 Q25 Q9 Q18 Q19 Q13 Q10 Q8 Q4 Q12 Q16 R14 Q17 Vout R6 Q20 Q6 Q5 Q21 Q7 R3 Q11 R7 R4 R5 C1 R9 Q1 R1 Q3 R13 R2 Gnd 4-299 ZSAT500 ABSOLUTE MAXIMUM RATING Input voltage Output Current(Io) Operating Temperature Storage Temperature Power Dissipation (Tamb=25°C) SOT223 3W(Note 3) TO92 600mW SO8 780mW(Note 3) 20V 200mA -55 to 125°C -65 to 150°C ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated):Tj=25°C, IO=100mA, Vin=9V SYMBOL PARAMETER VO CONDITIONS Output Voltage MIN. TYP. MAX. UNITS 4.875 5 5.125 V IO=1 to 200mA Tj=-55 to 125°C 4.8 5.2 V Vin=7 to 20V IO=1 to 100mA Tj=-55 to 125°C 4.8 5.2 V ∆VO Line Regulation Vin=7 to 20V 10 40 mV ∆VO Load Regulation IO=1 to 200mA IO=1 to 100mA 5 2 25 mV mV Quiescent Current Tj=-55 to 125°C 350 600 µA 50 100 µA µA lq ∆lq Quiescent Current Change IO=1 to 200mA Vin=7 to 20V Vn Output Noise Voltage ∆Vin /∆VO Ripple Rejection ∆Vin /∆VO Ripple Rejection Vin ∆VO/∆T VGI f=10Hz to 10KHz Vin=8 to 18V f=120Hz-22KHz 65 dB Vin=8 to 18V f=200KHz 40 dB Input Voltage Required To Maintain Regulation Average Temperature Coefficient of VO µV rms 75 7 IO=5.0mA Tj=-55 to 125°C Reverse Supply IGI=500mA Protection Diode Forward Voltage 4-300 6.7 V 0.1 mV/°C 2 V ZSAT500 TYPICAL CHARACTERISTICS 450 5.03 Output Voltage (V) 5.02 Quiescent Current (µA) IO = 5mA VIN = 9V 5.01 5.00 4.99 4.98 4.97 IO = 0 VIN =9V 400 350 300 4.96 250 -50 -25 25 0 50 75 100 125 -50 -25 25 0 50 75 100 125 Output Voltage Temperature Coefficient Quiescent Current v Temperature INPUT VOLTAGE Output Voltage Deviation (V) Temperature (°C) Output Voltage Deviation (V) Temperature (°C) 14V 9V +0.5 OUTPUT VOLTAGE DEVIATION 0 -0.5 IO=100mA COUT = 0 dVin/dt = 5V/µs 0 10 30 20 40 LOAD CURRENT 0 +0.5 OUTPUT VOLTAGE DEVIATION 0 -0.5 VIN= 9V COUT = 0 dIo/dt = 1A/µs 50 0 10 40 50 Time (µs) Line Transient Response Load Transient Response 500 2.5 400 2.0 Drop-Out Voltage (V) Short-Circuit Output Current (mA) 30 20 Time (µs) 300 200 VO = 0 100 100 mA VIN = 10V 0 Io=200mA 1.5 Io=100mA 1.0 0.5 0 -50 -25 0 25 50 75 100 125 -50 Temperature (°C) -25 0 25 50 75 100 125 Temperature (°C) Peak Output Current v Temperature Drop-Out Voltage v Temperature 4-301 ZSAT500 TYPICAL CHARACTERISTICS 80 1.0 Io = 100mA VIN = 9V 70 Output Impedance (Ω) Ripple Rejection (dB) 60 50 40 30 20 0.1 10 0 100 1k 10k 100k 0.01 1M 100 1K 10K 100K Frequency (Hz) Ripple Frequency (Hz) Output Impedance vs. Frequency Ripple Rejection vs. Ripple Frequency 4. The shut down feature of the device operates if its temperature exceeds its design limit as might occur during external faults, short circuits etc. If the regulator is supplied from an inductive source, a large voltage transient, on the regulator input, can result should the shut down circuit operate. It is advised that a capacitor (1µF or greater) should be applied across the regulator input to ensure that the maximum voltage rating of the device is not exceeded under shutdown conditions. 5. HF Stability The ZSAT500 is guaranteed stable without an input or output capacitor. However if an output capacitor is used then this should be a total value of at least 100nF and should be accompanied by an input capacitor of 200nF or greater, wired in close proximity to the regulator if stability is to be ensured. Notes: 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 given 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. Maximum power dissipation, for the SO8 and SOT223 packages, is calculated assuming that the device is mounted on a PCB measuring 2 inches square. 4-302 ZSAT500 APPLICATIONS Fixed Output Regulator Input Adjustable Output Regulator Input Output Output ZSR*** ZSR*** Iq R1 Gnd Vo= Vreg + (Vreg/R1 + Iq)R2 Gnd Current Regulator Input ZSR*** R1 Iq Output Io= (Vreg/R1) + Iq 4-303 R2 ZSAT500 CONNECTION DIAGRAMS SO8 Package Suffix – N8 SOT223 Top View Top View – Pin 4 floating or connected to pin 2 TO92 Package Suffix – C Bottom View ORDERING INFORMATION Part Number Package Part Mark ZSAT500N8 SO8 ZSAT500 ZSAT500G SOT223 ZSAT500 ZSAT500C TO92 ZSAT500 4-304 Package Suffix – G