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MAX1730 7x7??; n"?=a??????? 1 2 3 4 5 10 9 8 7 6 in out c2p c2n c1n c1p shdn fb MAX1730 max top view pgnd gnd 0.22 f MAX1730 out c2p c2n pgnd 0.22 f 4.7 f 1 f gnd in c1p c1n fb output 1.8v or 1.9v, up to 50ma input 2.7v to 5.5v shdn a j?^s? ___________________________ 19-1618; rev 0; 4/00 part MAX1730eub -40? to +85? temp. range pin-package 10 ?ax e? ? _______________________________ j ___________________________________
MAX1730 7x7??; n"?=a??????? 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics 7 */ 7 '#(/% 4)%/*/ t a = 0? to +85? vomfttpuifsxjtfopufe5zqjdbmwbmvftbsfbu5 " $
stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. in, out, shdn , fb to gnd .....................................-0.3v to +6v c1p, c1n, c2p, c2n to gnd ......................-0.3v to (v in + 0.3v) gnd to pgnd.....................................................................?.3v output short-circuit duration ........................................indefinite continuous power dissipation (t a = +70?) 10-pin ?ax (derate 5.6mw/? above +70?) ...........444mw junction temperature ......................................................+150? operating temperature range ...........................-40? to +85? storage temperature range .............................-65? to +150? lead temperature range (soldering, 10s)......................+300? fb = gnd fb = in shdn = in or gnd v in = 2.7v to 5.5v v in = 2.7v to 5.5v falling edge (100mv hysteresis) v out = gnd v in = 4.2v, shdn = gnd, v out = 1.8v or gnd shdn = in out forced to 1.8v, v in = 1.8v to 5.5v, shdn = gnd v in = 2.7v to 5.5v, i out = 0 to 50ma conditions ? -1 1 i shdn shutdown logic input current v 0.6 v il shdn logic input low voltage v 1.4 v ih shdn logic input high voltage ms 4.1 startup timer v in transition voltage (v in rising) ? 15 thermal shutdown threshold hysteresis ? 150 thermal shutdown threshold mhz 1.5 2.0 2.5 oscillator frequency v 1.746 1.80 1.854 v out output voltage v 2.3 2.6 v 2.7 5.5 v in input voltage range input undervoltage lockout ma 45 125 output short-circuit current ? 15 shutdown supply current ? 75 150 no-load supply current ? 15 output leakage current 1.843 1.90 1.957 units min typ max symbol parameter v 4.00 4.12 4.30 3.1 3.2 3.35 from 2:3 to 1:2 from 1:1 to 2:3 fb = gnd
MAX1730 7x7??; n"?=a??????? _______________________________________________________________________________________ 3 electrical characteristics 7 */ 7 '#(/% 4)%/*/ t a = -40? to +85? vomfttpuifsxjtfopufe
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note 1: specifications to -40? are guaranteed by design, not production tested. shdn = in or gnd v in = 2.7v to 5.5v v in = 2.7v to 5.5v falling edge (100mv hysteresis) fb = gnd v out = gnd v in = 4.2v, shdn = gnd shdn = in out forced to 1.8v, v in = 1.8v to 5.5v, shdn = gnd v in = 2.7v to 5.5v, i out = 0 to 50ma conditions fb = gnd fb = in ? -1 1 i shdn shutdown logic input current v 0.6 v il shdn logic input low voltage v 1.4 v ih shdn logic input high voltage v 3.1 3.35 v in transition voltage (v in rising) mhz 1.5 2.5 f oscillator frequency v 1.746 1.854 v out output voltage v 2.3 2.6 v 2.7 5.5 v in input voltage range input undervoltage lockout ma 125 output short-circuit current ? 5 shutdown supply current ? 150 no-load supply current ? 5 output leakage current 1.843 1.957 from 1:1 to 2:3 units min max symbol parameter from 2:3 to 1:2 4.00 4.30
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q ______________________________________________________________________ (v in = +3.6v, fb = gnd, shdn = in, c in = 1?, c1 = c2 = 0.22?, c out = 4.7?, t a = +25?, unless otherwise noted.) 0.1 10 1 100 1000 efficiency vs. output current MAX1730 toc01 output current (ma) efficiency (%) 100 90 80 70 60 0 10 30 20 50 40 v in = 5.0v v in = 2.7v v in = 3.6v v in = 3.3v 50 65 60 55 70 75 80 85 90 95 100 2.5 3.5 3.0 4.0 4.5 5.0 5.5 efficiency vs. input voltage MAX1730 toc02 input voltage (v) efficiency (%) i out = 25ma 50 65 60 55 70 75 80 85 90 95 100 2.5 3.5 3.0 4.0 4.5 5.0 5.5 efficiency vs. input voltage MAX1730 toc02 input voltage (v) efficiency (%) i out = 50ma 0 20 10 40 30 60 50 70 2.0 3.0 3.5 2.5 4.0 4.5 5.0 5.5 input current vs. input voltage MAX1730 toc04 input voltage (v) input current ( a) shutdown current no-load supply current 0.1 10 1 100 1000 output voltage vs. output current MAX1730 toc05 output current (ma) output voltage (v) 1.85 1.75 1.77 1.79 1.83 1.81 v in = 5.0v v in = 2.7v v in = 3.3v 0 0.4 0.2 0.8 0.6 1.2 1.4 1.6 1.8 1.0 2.0 023 1 456 output voltage vs. input voltage MAX1730 toc06 input voltage (v) output voltage (v) i out = 0 to 50ma
MAX1730 7x7??; n"?=a??????? _______________________________________________________________________________________ 5 line-transient response MAX1730 toc07 10 s/div 4v v in 3v v out ac-coupled 50mv/div load-transient response MAX1730 toc08 10 s/div 50ma i out 5ma v out ac-coupled 20mv/div startup and shutdown response MAX1730 toc09 100 s/div i in 50ma/div v shdn 5v/div v o 1v/div r l = 72 ? a j?^?
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