ZSAT500 Datasheet | Zetex Semiconductors

DESCRIPTION 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 65d B up to 22KHz , and 40d B up to 200KHz. 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 200m A. 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. 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 - - - - - - - - - - - - - Q25 .. Enhanced ripple rejection - 65d B at 22k Hz Small outline SO8 and SOT223 packages TO92 package 5 volt output Output current upto 200m A Tight initial tolerance Low quiescent current -55 to 125°C temperature range No external ponents Internal thermal shutdown Internal short circuit current limit APPLICATIONS Satellite receivers Low noise blocks Vin SCHEMATIC DIAGRAM Q14 Q18 Q19 Q13 Q10 Q8 Q4 Q12 R6 Q20 Q11 R7 R3 Q21 Q5 Q6 Q7 Q16 Q17 R14 Q9 Vout R4 R5 Q1 R1 Q3 C1 R9 R13 R2 Gnd 4-299 ABSOLUTE MAXIMUM RATING Input voltage Output Current(Io) Operating Temperature Storage Temperature 20V 200m A -55 to 125°C -65 to 150°C Power Dissipation (Tamb=25°C) SOT223 3W(Note 3) TO92 600m W SO8 780m...