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description gm6251 combines high accuracy with very low power con- sumption, and provides high output current even when the application requires extremely low input-output voltage dif- ferential. gm6251 includes a precision voltage reference, an error correction circuit, over-temperature protection, and a cur- rent limited output driver. fast transient response to load variations provides excellent stability under dynamic load conditions. gm6251 comes in sot-25 (150mw), sot -89 (500mw) and to-92 packages. application palmtops portable cameras video recorders features maximum output current 250ma (within maximum power dissipation) output voltage: from 1.8 v to 6.0v in 0.1v increments output voltage 2% cmos low power consumption, typically 1.0a at v = 5.0v out input stability typically 0.2%/ v ultra-low dropout voltage 0.38v @ i = out 200ma at v = 5.0v out small input/ output differential: 0.4v at 160ma (v = 3.3v) out sot-25 (150mw), sot -89 (500mw) and to-92 packages typical applica tion circuits g m 6 2 5 1 v 0 . 1 www.gammamicro.com 1 gm6251 v in v out v ss + + v in r l c l 1f (tantalum) c in 1f (tantalum) battery powered equipment reference voltage sources
marking information & pin configura tions (top view) g m 6 2 5 1 2 sot-89 1 2 3 gm6251 vva yww to-92 6251 vv ayww 1 2 3 1. v out 2. v ss 3. v in v out v ss v in xxvyw 1 3 2 5 4 v in v ss nc v out nc sot-25(so t-23-5) xx = marking code v = voltage code vv = voltage suffix (18=1.8v ,50=5.0v) a = assembly location y = y ear ww, w= weekly (fa = gm6251) package shipping sot-25 sot-25 sot-25 sot-25 sot-25 sot-89 sot-89 sot-89 sot-89 sot-89 3,000 units/ t ape and reel 3,000 units/ t ape and reel 3,000 units/ t ape and reel 3,000 units/ t ape and reel 3,000 units/ t ape and reel 1,000 units/ t ape and reel 1,000 units/ t ape and reel 1,000 units/ t ape and reel 1,000 units/ t ape and reel 1,000 units/ t ape and reel ordering number gm6251-1.8st25r gm6251-2.5st25r gm6251-2.7st25r gm6251-2.8st25r gm6251-3.0st25r gm6251-1.8st89r gm6251-2.5st89r gm6251-2.7st89r gm6251-2.8st89r gm6251-3.0st89r output v oltage ordering information to-92 to-92 to-92 to-92 to-92 to-92 to-92 to-92 to-92 to-92 1,000 units/ esd bag 2,000 units/ ammo pack (t ape) 2,000 units/ ammo pack (t ape) 2,000 units/ ammo pack (t ape) 2,000 units/ ammo pack (t ape) 2,000 units/ ammo pack (t ape) gm 6251-1.8t92b gm 6251-2.5t92b gm 6251-2.7t92b gm 6251-2.8t92b gm 6251-3.0t92b gm 6251-1.8t92rl gm 6251-2.5t92rl gm 6251-2.7t92rl gm 6251-2.8t92rl gm 6251-3.0t92rl 1.8v 1.8v 2.5v 2.5v 2.5v 2.5v 2.7v 2.7v 2.7v 2.7v 2.8v 2.8v 2.8v 2.8v 3.0v 3.0v 3.0v 3.0v 1.8v 1.8v voltage code e g t h j 1,000 units/ esd bag 1,000 units/ esd bag 1,000 units/ esd bag 1,000 units/ esd bag * for detail ordering number identification, please see last page.
g m 6 2 5 1 3 package shipping sot-25 sot-25 sot-25 sot-25 sot-25 sot-25 sot-25 sot-25 sot-89 sot-89 sot-89 sot-89 sot-89 sot-89 sot-89 sot-89 3,000 units/ t ape and reel 3,000 units/ t ape and reel 3,000 units/ t ape and reel 3,000 units/ t ape and reel 3,000 units/ t ape and reel 3,000 units/ t ape and reel 3,000 units/ t ape and reel 3,000 units/ t ape and reel 1,000 units/ t ape and reel 1,000 units/ t ape and reel 1,000 units/ t ape and reel 1,000 units/ t ape and reel 1,000 units/ t ape and reel 1,000 units/ t ape and reel 1,000 units/ t ape and reel 1,000 units/ t ape and reel ordering number gm6251-3.2st25r gm6251-3.3st25r gm6251-3.5st25r gm6251-3.6st25r gm6251-4.0st25r gm6251-4.4st25r gm6251-4.5st25r gm6251-5.0st25r gm6251-3.2st89r gm6251-3.3st89r gm6251-3.5st89r gm6251-3.6st89r gm6251-4.0st89r gm6251-4.4st89r gm6251-4.5st89r gm6251-5.0st89r output v oltage ordering information (continued) to-92 to-92 to-92 to-92 to-92 to-92 to-92 to-92 to-92 to-92 to-92 to-92 to-92 to-92 to-92 to-92 1,000 units/ esd bag 2,000 units/ ammo pack (t ape) 2,000 units/ ammo pack (t ape) 2,000 units/ ammo pack (t ape) 2,000 units/ ammo pack (t ape) 2,000 units/ ammo pack (t ape) 2,000 units/ ammo pack (t ape) 2,000 units/ ammo pack (t ape) 2,000 units/ ammo pack (t ape) gm 6251-3.2t92b gm 6251-3.3t92b gm 6251-3.5t92b gm 6251-3.6t92b gm 6251-4.0t92b gm 6251-4.4t92b gm 6251-4.5t92b gm 6251-5.0t92b gm 6251-3.2t92rl gm 6251-3.3t92rl gm 6251-3.5t92rl gm 6251-3.6t92rl gm 6251-4.0t92rl gm 6251-4.4t92rl gm 6251-4.5t92rl gm 6251-5.0t92rl 3.2v 3.2v 3.2v 3.2v 3.3v 3.3v 3.3v 3.3v 3.5v 3.5v 3.5v 3.5v 3.6v 3.6v 3.6v 3.6v 4.0v 4.0v 4.0v 4.0v 4.4v 4.5v 4.5v 4.5v 4.5v 5.0v 5.0v 5.0v 5.0v 4.4v 4.4v 4.4v voltage code u k v l m w n q * for detail ordering number identification, please see last page. 1,000 units/ esd bag 1,000 units/ esd bag 1,000 units/ esd bag 1,000 units/ esd bag 1,000 units/ esd bag 1,000 units/ esd bag 1,000 units/ esd bag
p ara met er sym bol ra ting s unit s 12 v - 0.3 ~ v + 0.3 ss in 500 500 -30 ~ +80 -40 ~ +125 v v mw c v in v out p d t opr t stg absolute maximum ratings block diagram input vo ltage outp ut v oltag e cont inuou s t otal p ower dissi patio n ( sot - 89) oper ating amb ient t empe rature stora ge t empe rature c v in v out v ss + - current limiter voltage reference outp ut cu rrent i out ma g m 6 2 5 1 4
parameter symbol min typ max unit circuit condition electrical characteristics ( t = 25c unless otherwise noted) a output voltage maximum output current (note 2) v (e) out i max out i =40ma, out v > v drop +v in out 1.764 2.450 2.646 2.744 2.940 3.136 3.234 3.430 3.528 3.920 4.312 4.410 4.900 1.800 2.500 2.700 2.800 3.000 3.200 3.300 3.500 3.600 4.000 4.400 4.500 5.000 1.836 2.550 2.754 2.856 3.060 3.264 3.366 3.570 3.672 4.080 4.488 4.590 5.100 v 1 250 ma 1 g m 6 2 5 1 5 gm6251-1.8 v gm6251-1.8 v gm6251-2.5v gm6251-2.5v gm6251-2.7v gm6251-2.7v gm6251-2.8v gm6251-2.8v gm6251-3.0v gm6251-3.0v gm6251-3.2v gm6251-3.2v gm6251-3.3v gm6251-3.3v gm6251-3.5v gm6251-3.5v gm6251-3.6v gm6251-3.6v gm6251-4.0v gm6251-4.0v gm6251-4.4v gm6251-4.4v gm6251-4.5v gm6251-4.5v gm6251-5.0v gm6251-5.0v v =3.0v, v (e) 1.62v in out v =4.0v, v (e) 2.3v in out v =4.0v, v (e) 2.43v in out v =4.0v, v (e) 2.52v in out v =4.0v, v (e) 2.97v in out v =6.0v, v (e) 4.5v in out v =6.0v, v (e) 4.05v in out v =6.0v, v (e) 3.96v in out v =5.0v, v (e) 3.6v in out v =5.0v, v (e) 3.24v in out v =5.0v, v (e) 3.15v in out v =4.0v, v (e) 2.7v in out v =4.0v, v (e) 2.88v in out
parameter symbol min typ max unit circuit condition load stability input - output (note 3) voltage differential d v out vdif1 vdif1 vdif1 vdif1 vdif1 vdif1 vdif1 vdif1 vdif1 vdif1 vdif1 vdif1 vdif1 vdif2 vdif2 vdif2 vdif2 vdif2 vdif2 vdif2 vdif2 vdif2 vdif2 vdif2 vdif2 vdif2 v =2.8v, 1ma i 60ma in out v =3.5v, 1ma i 80ma in out v =4.3v, 1ma i 100ma in out v =4.5v, 1ma i 100ma in out v =4.6v, 1ma i 100ma in out v =5.0v, 1ma i 100ma in out v =5.4v, 1ma i 100ma in out v =5.5v, 1ma i 100ma in out v =6.0v, 1ma i 100ma in out i = 60ma out i = 80ma out i = 80ma out i = 80ma out i = 80ma out i = 80ma out i = 100ma out i = 100ma out i = 100ma out i = 100ma out i = 100ma out i = 100ma out i = 100ma out i = 160ma out i = 160ma out i = 160ma out i = 160ma out i = 160ma out i = 160ma out i = 200ma out i = 200ma out i = 200ma out i = 200ma out i = 200ma out i = 200ma out i = 200ma out 45 45 45 45 45 45 45 45 45 40 40 40 40 90 90 90 90 90 90 90 90 90 80 80 80 80 mv 1 180 180 180 180 180 180 170 120 120 120 170 120 120 360 360 360 360 360 360 330 300 300 300 330 300 300 900 550 400 400 400 400 400 380 380 380 400 380 380 1300 850 700 700 700 700 630 600 600 600 630 600 600 mv 1 electrical characteristics ( t = 25c unless otherwise noted) a g m 6 2 5 1 6 gm6251-1.8v gm6251-5.0v gm6251-2.5v gm6251-2.7v gm6251-2.8v gm6251-3.0v gm6251-3.2v gm6251-3.3v gm6251-3.5v gm6251-3.6v gm6251-4.0v gm6251-4.4v gm6251-4.5v gm6251-1.8v gm6251-5.0v gm6251-2.5v gm6251-2.7v gm6251-2.8v gm6251-3.0v gm6251-3.2v gm6251-3.3v gm6251-3.5v gm6251-3.6v gm6251-4.0v gm6251-4.4v gm6251-4.5v v =3.7v, 1ma i 80ma in out v =3.8v, 1ma i 80ma in out v =4.0v, 1ma i 80ma in out v =4.2v, 1ma i 80ma in out
parameter symbol min typ max unit circuit condition output current limit 1.0 500 - ma supply current i ss v = 2.8v in v = 3.5v in v = 3.7v in v = 3.8v in v = 4.0v in v = 4.2v in v = 4.3v in v = 4.5v in v = 4.6v in v = 5.0v in v = 5.4v in v = 5.5v in v = 6.0v in 2.9 a 2 input voltage output voltage temperature characteristics v in d v out d t opr ? vout i = 40ma out 2.8v v 10.0v in i = 40ma out 3.5v v 10.0v in i = 40ma out 3.7v v 10.0v in i = 40ma out 3.8v v 10.0v in i = 40ma out 4.0v v 10.0v in i = 40ma out 4.2v v 10.0v in i = 40ma out 4.3v v 10.0v in i = 40ma out 4.5v v 10.0v in i = 40ma out 4.6v v 10.0v in i = 40ma out 5.0v v 10.0v in i = 40ma out 5.4v v 10.0v in i = 40ma out 5.5v v 10.0v in i = 40ma out 6.0v v 10.0v in i = 10ma out -30c t opr 80c 0.2 0.3 %/ v 1 10 v - 100 ppm/c 1 input stability d v out d vin ? vout electrical characteristics ( t = 25c unless otherwise noted) a gm6251-1.8v gm6251-5.0v gm6251-2.5v gm6251-2.7v gm6251-2.8v gm6251-3.0v gm6251-3.2v gm6251-3.3v gm6251-3.5v gm6251-3.6v gm6251-4.0v gm6251-4.4v gm6251-4.5v gm6251-1.8v gm6251-5.0v gm6251-2.5v gm6251-2.7v gm6251-3.0v gm6251-3.2v gm6251-3.3v gm6251-3.5v gm6251-3.6v gm6251-4.0v gm6251-4.4v gm6251-4.5v gm6251-2.8v g m 6 2 5 1 7 note: 1. v (t) = specified output voltage out 2. v (e) = effective output voltage (the output voltage when"v (t) + 1.0v" is provided at the v pin while out out in maintaining a certain i value) out 3. vdif = { v 1 (note 4) - v (e)} in out 4. v 1 = the input voltage at the time 98% of v (e) is output (input voltage has been gradually reduced). in out * output voltage from 1.8v to 6.0v in 0.1v increments ate available
directions for usage notes on usage 1. please use this ic within the stipulated absolute maximum ratings as the ic is liable to malfunction outside of such parameters. 2. there is a possibility theat, oscillation may occur as a result of the impedance present between the power supply and the ic's input. where impedance is 10w or more, please use a capacitor (c ) in of at least 1f . with a large output current, operations can be stabilised by increasing capacitor size (c ). if c is in in small and capacitor size (c ) is increased, there is a possibility of oscillation due to input impedance. l in such cases, operations can be stabilised by either increasing the size of c or decreasing the size in of c . l 3. please ensure the output current (i ) is less than pd (v - v ) and does not exceed the out in out stipulated continuous total power dissipation value (pd) for the package. gm6251 v in v o v ss v in open circuit 1 test circuit circuit 2 gm6251 v in v o v ss + + v in r l 1f (tantalum) 1f (tantalum) v a a g m 6 2 5 1 8
g m 6 2 5 1 9 performance characteristics for gm6251 - 3.0 3.1 3.0 2.9 2.8 2.7 0 20 40 60 80 100 120 140 160 180 output current: i (ma) out o u t p u t v o l t a g e : v ( v ) o u t figure 1: output voltage vs. output current 1.0 0.8 0.6 0.4 0.2 0.0 -0.2 0 20 40 60 80 100 120 140 160 180 output current: i (ma) out i n p u t / o u t p u t v o l t a g e d i f f . : v ( v ) d i f figure 2: input/ output voltage differential vs. output current 3.10 3.05 3.00 2.95 2.90 2.85 3 4 5 6 7 8 9 10 input voltage: v (v) in o u t p u t v o l t a g e : v ( v ) o u t figure 4: output voltage vs. input voltage 3.20 3.00 2.80 2.60 2.40 2.20 2.5 3.0 2.5 10ma 40ma i =1ma out input voltage: v (v) in o u t p u t v o l t a g e : v ( v ) o u t figure 3: output voltage vs. input voltage 3.0 2.0 1.0 0 0 2 4 6 8 10 input voltage: v (v) in s u p p l y c u r r e n t : i ( a ) s s figure 5: supply current vs. input voltage 2.50 2.25 2.00 1.75 1.50 3 4 5 6 7 8 9 10 input voltage: v (v) in s u p p l y c u r r e n t : i ( a ) s s figure 6: supply current vs. input voltage t opr = 25c v =4v in c =1f in c =1f l t opr = 25c c =1f in c =1f l t = 25c opr c =1f in c =1f l t = 25c opr c =1f in c =1f l i =1ma out 10ma 40ma t opr = 25c t opr = 25c
g m 6 2 5 1 10 performance characteristics for gm6251- 3.0 6 4 2 0 -2 -4 -6 time (0.4msec/ div) figure 7: input transient response 1 figure 8: input transient response 2 i n p u t v o l t a g e : v ( v ) i n o u t p u t v o l t a g e : v ( v ) o u t 6 5 4 3 2 1 i n p u t v o l t a g e : v ( v ) i n o u t p u t v o l t a g e : v ( v ) o u t time (1msec/ div) 6 5 4 3 2 1 0 5.0 4.5 4.0 3.5 3.0 2.5 inp ut v olta ge ou tpu t v olta ge i = 1 ma ou t c =1 f l 60 50 40 30 20 10 0 0.01 0.1 1 10 v = 4v +1v ac in dc p-p i = 40ma, c = 1f out l inp ut v olta ge ou tpu t v olta ge figure 9: ripple rejection rate ripple frequency: f (khz) r i p p l e r e j e c t i o n r a t e : r r ( d b ) i = 1 ma ou t c =1 f l to-92 p ackage outline dimensions 4.6 0.1 4.6 0.1 2.3 3 - 0.46 1.45 0.1 14.5 0.5 1.27 1.27 2 2 2 2 3.6 0.15 0.38 0.015 3.6 0.15 1.3 0.1 5 5 unit: mm
g m 6 2 5 1 11 sot-89 package outline dimensions pad layout 45 1 . 5 1.5 0.7 3 2 1 4.50 0.05 units: mm 1.650 ref 1.400 ref 4.20 0.05 1.00 0.07 2.5 0.05 0.46 0.025 3.00 0.025 1.50 1.50 1.50 0.05 0.38 0.01 6 r 0.13~3x no draft~2 r 0.1 max 6~2x 6~2x r 0.13~2x r 0.13~2x unit: mm r 0.13~4x sot-25(sot -23-5) p ackage outline dimensions pad layout 2.9 0.1 0.074 1.9 0.037 0.95 0.037 0.95 0.094 2.4 0.028 0.7 inches mm ( ) 1.9 0.05 0.95 0.038 2.8 0.1 1.5 0.05 0.65 0.05 0.35 0.03 0.13 0~0.1 0.8 0.05 1.10 0.1 5 5 0.039 1.0
g m 6 2 5 1 12 ordering number gm 6251 1.8 t92 b gamma micro. circuit type output voltage 1.8: 1.8v , 2.5: 2.5v 2.7: 2.7v , 2.8: 2.8v 3.0: 3.0v , 3.3: 3.3v 3.5: 3.5v , 3.6: 3.6v 4.0: 4.0v , 4.4: 4.4v 4.5: 4.5v , 5.0: 5.0v package st25: sot-25 t92: to-92 st89: sot-89 shipping b: esd bag rl: ammo pack (t ape) t : tube r: t ape & reel
g m 6 2 5 1 13

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