ZSR SERIES 2.85 TO 12 VOLT FIXED POSITIVE LOCAL VOLTAGE REGULATOR DEVICE DESCRIPTION FEATURES 2.85 to 12 Volt The ZSR Series three terminal fixed positive voltage regulators feature internal circuit current limit and Output current up to 200mA thermal shutdown making the devices difficult to Tight initial tolerance of 2.5% destroy. The circuit design allows creation of any Low 600 a quiescent current custom voltage in the range 2.85 to 12 volts. The devices are available in a small outline surface mount -55 to 125C temperature range package, ideal for applications where space saving is No external components important, as well as through hole TO92 style Internal thermal shutdown packaging. The devices are suited to local voltage regulation applications, where problems could be Internal short circuit current limit encountered with distributed single source regulation, Small outline SOT223 package as well as more general voltage regulation TO92 package applications. The ZSR Series show performance characteristics VOLTAGE RANGE superior to other local voltage regulators. The initial ZSR285 2.85V output voltage is maintained to within 2.5% with a ZSR300 3.0V quiescent current of typically 350A. Output voltage ZSR330 3.3V change, with input voltage and load current, is much ZSR400 4.0V lower than competitive devices. The ZSR devices are ZSR485 4.85V completely stable with no external components. ZSR500 5.0V ZSR520 5.2V ZSR600 6.0V ZSR800 8.0V ZSR900 9.0V ZSR1000 10.0V ZSR1200 12.0V ISSUE 7 - JUNE 2005 SEMICONDUCTORS 1ZSR SERIES ABSOLUTE MAXIMUM RATING Input voltage 20V Power Dissipation (T =25C) amb SOT223 2W(Note 3) Output Current(I ) 200mA o TO92 600mW Operating Temperature -55 to 125C Storage Temperature -65 to 150C ELECTRICAL CHARACTERISTICS Notes: 3. Maximum power dissipation for the SOT223 and 1. The maximum operating input voltage and output SO8 packages, is calculated assuming that the device current of the device will be governed by the is mounted on a PCB measuring 2 inches square. maximum power dissipation of the selected package. 4. The shut down feature of the device operates if its Maximum package power dissipation is specified at temperature exceeds its design limit as might occur 25 C and must be linearly derated to zero at during external faults, short circuits etc. If the T =125C. amb regulator is supplied from an inductive source then a 2. The following data represents pulse test conditions large voltage transient, on the regulator input, can with junction temperatures as indicated at the result should the shut down circuit operate. It is initiation of the test. Continuous operation of the advised that a capacitor (1F or greater) should be devices with the stated conditions might exceed the applied across the regulator input to ensure that the power dissipation limits of the chosen package. maximum voltage rating of the device is not exceeded under shutdown conditions. ZSR285 TEST CONDITIONS (Unless otherwise stated):T =25C, I =100mA, V =6.85V j O in SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNITS V Output Voltage 2.78 2.85 2.92 V O I =1 to 200mA 2.736 2.964 V O V =4.85 to 20V 2.736 2.964 V in I =1 to 100mA O V Line Regulation V =4.85 to 20V 10 40 mV O in V Load Regulation I =1 to 200mA 5 25 mV O O I =1 to 100mA 2 mV O l Quiescent Current 350 600 A q l Quiescent Current I =1 to 200mA 100 A O q Change V =4.85 to 20V 100 A in V Output Noise Voltage f=10Hz to 10kHz 75 Vrms n V / V Ripple Rejection V =5.85 to 18V in O in f=120Hz 48 62 dB V Input Voltage Required in To Maintain Regulation 4.85 4.55 V V / T Average Temperature I =5.0mA O O CoefficientofV 0.1 mV/C O =T =-55 to 125C j ISSUE 7 - JUNE 2005 SEMICONDUCTORS 2