device 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 65db up to 22khz , and 40db 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 350 m a. 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. 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 - 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 125c temperature range no external components internal thermal shutdown internal short circuit current limit applications satellite receivers low noise blocks 5 volt enhanced positive local voltage regulator issue 1 - december 1995 q14 q16 q17 q11 r7 r4 r3 q18 q19 r5 q20 q13 q25 q4 q5 q1 r1 q3 c1 q6 q7 r2 q8 r14 q10 r9 r13 v in v out gnd r6 q9 q12 q21 schematic diagram ZSAT500 4-299 not recommended for new design please use zsr500
absolute maximum rating input voltage 20v output current(i o ) 200ma operating temperature -55 to 125c storage temperature -65 to 150c power dissipation (t amb =25c) sot223 3w(note 3) to92 600mw so8 780mw(note 3) ZSAT500 electrical characteristics test conditions (unless otherwise stated):t j =25c, i o =100ma, v in =9v symbol parameter conditions min. typ. max. units v o output voltage 4.875 5 5.125 v i o =1 to 200ma t j =-55 to 125c 4.8 5.2 v v in =7 to 20v i o =1 to 100ma t j =-55 to 125c 4.8 5.2 v d v o line regulation v in =7 to 20v 1040mv d v o load regulation i o =1 to 200ma i o =1 to 100ma 5 2 25 mv mv l q quiescent current t j =-55 to 125c 350 600 m a d l q quiescent current change i o =1 to 200ma v in =7 to 20v 50 100 m a m a v n output noise voltage f=10hz to 10khz 75 m v rms d v in / d v o ripple rejection v in =8 to 18v f=120hz-22khz 65 db d v in / d v o ripple rejection v in =8 to 18v f=200khz 40 db v in input voltage required to maintain regulation 7 6.7 v d v o / d t average temperature coefficient of v o i o =5.0ma t j =-55 to 125c 0.1 mv/c v gi reverse supply protection diode forward voltage i gi =500ma 2 v 4-300 not recommended for new design please use zsr500
ZSAT500 quiescent current ( m a) v = 9v i = 5ma -50 -25 0 25 50 75 100 125 temperature (c) short-circuit output current (ma) peak output current v temperature 500 400 300 200 100 0 v = 0 v = 10v o in -50 -25 0 25 50 75 100 125 temperature (c) io=100ma io=200ma 2.5 2.0 1.5 1.0 0.5 0 drop-out voltage (v) drop-out voltage v temperature -50 -25 0 25 50 75 100 125 temperature (c) 450 400 350 300 250 quiescent current v temperature o in -50 -25 0 25 50 75 100 125 5.00 4.98 temperature (c) output voltage (v) output voltage temperature coefficient 4.99 5.01 01020 30 40 50 -0.5 0 +0.5 time ( m s) line transient response output voltage deviation (v) 14v 9v 01020 30 40 50 -0.5 0 +0.5 0 load current time ( m s) output voltage deviation (v) load transient response v in = 9v c out = 0 di o /dt = 1a/ m s 100 ma output voltage deviation input voltage output voltage deviation typical characteristics v =9v i = 0 o in dv in /dt = 5v/ m s i o =100ma c out = 0 5.02 5.03 4.96 4.97 4-301 not recommended for new design please use zsr500
100 1k 10k 100k 1m ripple rejection (db) ripple rejection vs. ripple frequenc y ripple frequency (hz) 0 10 20 30 40 50 60 70 80 typical characteristics 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 t amb =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 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 (1 m f 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. 100 1k 10k 100k 1.0 0.1 0.01 frequency (hz) output impedance ( w ) i o = 100ma v in = 9v output impedance vs. frequency ZSAT500 4-302 not recommended for new design please use zsr500
fixed output regulator adjustable output regulator input output gnd zsr*** input output gnd zsr*** r1 r2 iq vo= vreg + (vreg/r1 + iq)r2 current regulator input output zsr*** r1 iq io= (vreg/r1) + iq applications ZSAT500 4-303 not recommended for new design please use zsr500
to92 package suffix C c bottom view connection diagrams so8 package suffix C n8 top view sot223 package suffix C g top view C pin 4 floating or connected to pin 2 part number package part mark ZSAT500n8 so8 ZSAT500 ZSAT500g sot223 ZSAT500 ZSAT500c to92 ZSAT500 ZSAT500 ordering information 4-304 not recommended for new design please use zsr500
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