elektronische bauelemente sm1117a 1a low dropout positive adjustable or fixed-mode regulator 01-jun-2011 rev. b page 1 of 4 http://www.secosgmbh.com/ any changes of specification will not be informed individually. 1117 ??? ???????? adj ( gnd ) date code v out v in vout 1.5v: -15 3.3v: -33 1.8v: -18 5.0v: -50 2.5v: -25 adj: blank gs1117y ?? ? ? ? ? ? ? ? ? ?? adj ( gnd ) date code v out v in vout 1.5v: 15 3.3v: 33 1.8v: 18 5.0v: 50 2.5v: 25 adj: blank rohs compliant product a suffix of ?-c? specifies halogen free description the sm1117a is a low dropout at positive adjustable or fixed-mode regulator with minimum of 1a output current capability. the product is specifically designed to provide well-regulated supply for low voltage ic applications such as high-speed bus termination and low current 3.3v logic supply. sm1117a is also well suited for other applications such as vga cards. sm1117a is guaranteed to have lower than 1.4v dropout at full load current making it ideal to provide well-regulated outputs of 1.25 to 5.0 with 6.4v to 12v input supply. features ? 1.4vmaximum dropout full load current ? fast transient response ? output current limiting ? built-in thermal shutdown ? good noise rejection ? 3-terminal adjustable or fixed 1.5v, 1.8v, 2.5v, 3.3v, 5.0v applications ? pc peripheral ? communication marking production a line production b line package information package mpq leader size sot-89 1k 7? inch sot-89 a e c d b k h f g l j 1 2 3 4 millimete r millimete r ref. min. max. ref. min. max. a 4.40 4.60 g 0.40 0.58 b 3.94 4.25 h 1.50 typ c 1.40 1.60 j 3.00 typ d 2.30 2.60 k 0.32 0.52 e 1.50 1.70 l 0.35 0.44 f 0.89 1.20
elektronische bauelemente sm1117a 1a low dropout positive adjustable or fixed-mode regulator 01-jun-2011 rev. b page 2 of 4 http://www.secosgmbh.com/ any changes of specification will not be informed individually. typical circuit block diagram pin descriptions name i/o pin# description adj (gnd) i 1 a resistor divider from this pin to the v out pin and ground sets the output voltage (ground only for fixed mode) v out o 2 the output pin of regulator. a min. of 10 f capacitor must be connected from this pin to ground to insure stability. v in i 3 the input pin of regulator. typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the min. dropout voltage during the load transient response. this pin must always be 1.3v higher than v out in order for the device to regulate properly. absolute maximum ratings parameter symbol ratings unit dc supply voltage vin -0.3 to 12 v power dissipation (t a = 25c) p d internally limited operating & temperature range t stg 0~150,-65~150 c
elektronische bauelemente sm1117a 1a low dropout positive adjustable or fixed-mode regulator 01-jun-2011 rev. b page 3 of 4 http://www.secosgmbh.com/ any changes of specification will not be informed individually. electrical characteristics parameter test conditions min. typ. max unit reference voltage sm1117a-adj i o =10ma, t j =25c, (v in - v out )=1.5v 1.225 1.25 1.275 v sm1117a-1.5 i o =10ma, t j =25c, 3.0v Q v in Q 12v 1.47 1.5 1.53 v sm117a-1.8 i o =10ma, t j =25c, 3.3v Q v in Q 12v 1.764 1.8 1.836 v sm117a-2.5 i o =10ma, t j =25c, 4.0v Q v in Q 12v 2.45 2.5 2.55 v sm117a-3.3 i o =10ma, t j =25c, 4.8v Q v in Q 12v 3.235 3.3 3.365 v output voltage sm117a-5.0 i o =10ma, t j =25c, 6.5v Q v in Q 12v 4.9 5 5.1 v line regulation sm117a-xxx i o =10ma, v out +1.5v elektronische bauelemente sm1117a 1a low dropout positive adjustable or fixed-mode regulator 01-jun-2011 rev. b page 4 of 4 http://www.secosgmbh.com/ any changes of specification will not be informed individually. characteristic curves
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