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6 VOLT ENHANCED POSITIVE LOCAL VOLTAGE REGULATOR ISSUE 1 - AUGUST 1996 DEVICE DESCRIPTION The ZSAT600 is an enhanced three terminal fixed positive 6 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 62dB up to 22KHz , and 37dB up to 200KHz. The device features internal circuit current limit and thermal shutdown making it almost impossible to destroy. The ZSAT600 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 450A. 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. ZSAT600 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. FEATURES * * * * * * * * * * * * * Enhanced ripple rejection - 62dB at 22kHz Small outline SO8 and SOT223 packages TO92 package 6 volt output Output current upto 200mA Tight initial tolerance Low quiescent current -55 to 125C temperature range No external components Internal thermal shutdown Internal short circuit current limit APPLICATIONS Satellite receivers Low noise blocks SCHEMATIC DIAGRAM Q14 Q25 Q18 Q19 Q13 Q10 Q8 Q4 Q12 R6 Q20 Q11 R7 R3 Q21 Q5 Q6 Q7 Q16 Q17 R14 Q9 Vin Vout R4 R5 Q1 R1 Q3 C1 R9 R13 R2 Gnd 4-305 ZSAT600 ABSOLUTE MAXIMUM RATING Input voltage Output Current(Io) Operating Temperature Storage Temperature 20V 200mA -55 to 125C -65 to 150C Power Dissipation (Tamb=25C) SOT223 3W(Note 3) TO92 600mW SO8 780mW(Note 3) ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated):Tj=25C, IO=100mA, Vin=9V SYMBOL PARAMETER VO CONDITIONS MIN. 5.85 TYP. 6 MAX. 6.15 6.24 UNITS V V Output Voltage IO=1 to 200mA Tj=-55 to 125C Vin=8 to 20V IO=1 to 100mA Tj=-55 to 125C 5.76 5.76 6.24 V VO VO lq lq Line Regulation Load Regulation Vin=8 to 20V IO=1 to 200mA IO=1 to 100mA Tj=-55 to 125C 10 5 2 450 40 25 mV mV mV A A A V rms dB Quiescent Current 700 60 100 Quiescent Current Change IO=1 to 200mA Vin=8 to 20V Output Noise Voltage f=10Hz to 10KHz Vin=10 to 18V f=120Hz-22KHz Vin=10 to 18V f=200KHz 90 Vn Vin /VO Ripple Rejection Vin /VO Ripple Rejection 62 37 dB Vin VO/T Input Voltage Required To Maintain Regulation Average Temperature Coefficient of VO IO=5.0mA Tj=-55 to 125C 8 7.7 V 0.18 2 mV/C V VGI Reverse Supply IGI=500mA Protection Diode Forward Voltage 4-306 ZSAT600 TYPICAL CHARACTERISTICS 6.03 6.02 6.01 550 Io=5mA Vin=10V Io=0 Vin=10V Quiescent Current (A) 500 Output Voltage (V) 6.00 5.99 5.98 5.97 5.96 5.95 5.94 -75 -25 25 75 125 450 400 350 300 -75 -25 25 75 125 Temperature (C) Temperature (C) Output Voltage Temperature Coefficient Quiescent Current v Temperature Output Voltage Deviation (V) 15 10 Input Voltage Output Voltage Deviation (V) Load Current 100mA 0mA +0.2 0 -0.2 Output Voltage Deviation Output Voltage Deviation Vin=10V Cout=0 dIo/dt=1A/s +0.2 0 -0.2 Io=100mA Cout=0 dVin/dt=5V/s 0 20 40 60 80 0 20 40 60 80 Time (s) Time (us) Line Transient Response 500 Load Transient Response 2.5 Short-Circuit Output Current (mA) Dropout Voltage (V) 400 2.0 Io=200mA Io=100mA 300 1.5 200 Vo=0V Vin=10V 1.0 100 0.5 0 -75 -25 25 75 125 0 -75 -25 25 75 125 Temperature (C) Temperature (C) Peak Output Current v Temperature Dropout Voltage v Temperature 4-307 ZSAT600 TYPICAL CHARACTERISTICS 80 70 60 50 40 30 20 10 0 100 1.0 Io=100mA Vin=10V Output Impedance (Ohms) 1K 10K 100K 1M Ripple Rejection (dB) 0.1 0.01 100 1K 10K 100K Ripple Frequency (Hz) Frequency (Hz) Ripple Rejection v Ripple Frequency Output Impedance v Frequency 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 (1F 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 ZSAT600 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=125C. 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. The shut down feature of the device operates if 4-308 ZSAT600 APPLICATIONS Fixed Output Regulator Adjustable Output Regulator Input ZSR*** Output Input ZSR*** Output Iq Gnd Vo= Vreg + (Vreg/R1 + Iq)R2 R1 R2 Current Regulator Gnd Input ZSR*** R1 Output Io= (Vreg/R1) + Iq Iq 4-309 ZSAT600 CONNECTION DIAGRAMS SO8 Package Suffix - N8 SOT223 Package Suffix - G Top View Top View - Pin 4 floating or connected to pin 2 TO92 Package Suffix - C Bottom View ORDERING INFORMATION Part Number ZSAT600N8 ZSAT600G ZSAT600C Package SO8 SOT223 TO92 Part Mark ZSAT600 ZSAT600 ZSAT600 4-310 |
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