BL317L www.belling.com.cn v1.0 page 1 3 - terminal adj ustable output positive voltage regulator BL317L description the BL317L is an adj ustable 3 - terminal positive voltage regulator capable of supplying in excess of 100ma over voltage range of 1.2v to 37v. this voltage regulator is exceptionally easy to use and requires only two external resistors to set the output voltage. whats more, it employs internal current limiting, thermal shutdown and safe area compensation, making them essentially blow C out proof. the BL317L serves a wide variety of applications including local, on card regulation. it can also be used to make a programmable output regulator, or by connecting a fixed resistor between the adj ustmen t and output, the BL317L can be used as a precision current regulator. features ? output current in excess of 1 00m a ? output voltage adj ustable from 1.3v to 37v ? internal short circuit current limiting ? internal thermal ov erload protection ? output transistor safe - area compensation ? floating operation for high voltage applications ? eliminates stocking many fixed voltages absolute maximu m ratings parameters symbol rating units input - output voltage differential vi - vo 40 v power dissipation pd internal limited w operating junction temperature range tj - 40~+125 ? c storage temperature range tstg - 65~+150 ? c to - 92 1
BL317L www.belling.com.cn v1.0 page 2 block diagram electrical characteristics vi - vo=5v, - 40 ? c BL317L www.belling.com.cn v1.0 page 3 thermal resistance, junction - to - case r ? jc 83 ? c/w thermal resistance, junction - to - case r ? ja 160 ? c/w notes: 1. load and line regulation are specified at constant junction tempe rature. changes in vo due to heating effects must be taken into account separately. pulse testing with low duty cycle is used. 2. c adj , when used, is connected between the adj ustment pin and ground. 3. since long - term stability cannot be measured on each d evice before shipment, this specification is an engineering estimate of average stability from lot to lot. test circuits : figure 1. line regulation and ?i adj /line test circuit figure 2. load regulation and ?i adj /load test circuit
BL317L www.belling.com.cn v1.0 page 4 figure 3. standard test circuit figure 4. ripple rejection test circuit typical characteristics performance : figure 5 . load regulatio n figure 6 . ripple rejection
BL317L www.belling.com.cn v1.0 page 5 figure 7 . current limit figure 8 . dropout voltage figure 9 . minimum operating current figure 10 . ripple rejection versus frequency figure 11 . temperature stability figure 12 . adj ustment pin current figure 13 . line regulation figure 14 . output noise
BL317L www.belling.com.cn v1.0 page 6 figure 15 . line transient response figure 16 . load transient response package dimensions : to - 92 unit: mm 1 . 2 7 2 . 5 4 0 . 1 0 4 . 5 5 0 . 1 5 0 . 4 6 0 . 0 8 1 4 . 3 0 . 2 3 . 4 3 3 . 5 0 . 2 1 . 2 5 0 . 1 5 1 . 6 0 0 . 4 4 0 . 0 7 4 . 5 0 . 2
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