ordering information appears at end of data sheet. 19-7454; rev 1; 3/16 general description the MAX17651 ultra-low quiescent current, high-voltage linear regulator is ideal for use in industrial and battery- operated systems. the device operates from a 4v to 60v input voltage, delivers up to 100ma of load current, and consumes only 8a of quiescent current at no load. the device consumes only 0.9a current when in shutdown. output voltage is adjustable in the 0.6v to 59v voltage range. feedback voltage accuracy is 2% over temperature. an open-drain, active-low pgood pin provides a power- good signal to the system upon achieving successful regulation of the output voltage. the device also incorporates an enable pin (en) that allows the user to turn the part on or off. the device has a thermal shutdown feature that shuts down the part when the die temperature exceeds 165c. the MAX17651 operates over the -40c to +125c industrial temperature range and is available in a 6 lead, compact tsot package. applications low-current industrial power supplies battery-powered equipment post regulator for switching power supplies utility meters remote sensors benefts and features extremely easy to use ? only 4 external components required ? stable with tiny 4.7f, 0805 output capacitor ? all ceramic capacitors, compact layout reduces number of linear regulators to stock ? wide 4v to 60v input voltage range ? adjustable 0.6v to 59v output ? up to 100ma load current capability operates reliably in adverse industrial environments ? built-in output voltage monitoring with pgood pin ? high-voltage enable input ? low 8a quiescent current ? low dropout voltage of 300mv at 100ma ? overload protection ? overtemperature protection ? -40c to +125c operation v out r 1 432 k? 5 v r 2 59 k? c out 4 . 7 f pgood out fb c in 0 . 1 f en in gnd v out 5 . 5 v to 60 v max 17651 application circuit for 5v output MAX17651 60v, 100ma, ultra-low quiescent current, linear regulator
in to gnd .............................................................. -0.3v to +70v en, out to gnd ............................................ -0.3v to in + 0.3v fb, pgood to gnd ............................................... -0.3v to +6v output short-circuit duration .................................... continuous operating temperature range ......................... -40c to +125c junction temperature ...................................................... +150c storage temperature range ............................ -65c to +160c continuous power dissipation (t a = +70c) (multilayer board) tsot (derate 9.1mw/c above +70c) ...................... 727mw lead temperature (soldering 10s) .................................. +300c tsot junction-to-ambient thermal resistance ( ja ) ........ 110c/w junction-to-case thermal resistance ( jc ) ............... 50c/w (note 1) (v in = 12v, c out = 4.7f t a = t j = -40c to +125c, unless otherwise noted. typical values are at t a = +25c. all voltages are referenced to gnd, unless otherwise noted.) (note 2) note 2: all the limits are 100% tested at +25c. limits over temperature are guaranteed by design. parameter symbol conditions min typ max unit input supply (v in ) input voltage range v in 4 60 v input supply current i in-sh v en = 0v, shutdown mode 0.9 1.8 a i in-q v en = v in , i load = 0ma 8 15 a enable(en) en threshold v enr v en rising 2 v v enf v en falling 0.6 v en leakage current i en t a = +25c -100 +100 na feedback (fb) fb regulation voltage v fb-reg 0.588 0.6 0.612 v fb input leakage current i fb v fb = 0.6v, t a = 25c -25 +25 na current limit current limit threshold i limit v in = 5.5v, v out = 4.5v 101 140 165 ma pgood pgood rising threshold v pgood-rise v fb rising 89.5 92 94.5 % pgood falling threshold v pgood-fall v fb falling 87 89.5 92 % pgood output level low i pgood = 1ma 0.2 v pgood output leakage current v pgood = 5.5v , t a = +25c 1 a output voltage dropout voltage v do v in = 4.5v, i load = 100ma 280 550 mv line regulation v in = 4v to 60v, v out = fb, i load = 1ma 0.1 % load regulation 0.1ma < i load < 100ma, v out = fb 0.5 1.2 % thermal shutdown thermal-shutdown threshold temperature rising 165 c thermal-shutdown hysteresis 15 c maxim integrated 2 note 1: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four-layer board. for detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial . absolute maximum ratings package thermal characteristics electrical characteristics MAX17651 60v, 100ma, ultra-low quiescent current, linear regulator www.maximintegrated.com
(v in = 6v, v out = 5v, c out = 4.7f t a = +25c, unless otherwise noted. 7.5 8 8.5 9 9.5 10 10.5 11 5 10 15 20 25 30 35 40 45 50 55 60 no load supply current(a ) input voltage (v) no load supply current vs supply voltage toc1 0 0.5 1 1.5 2 2.5 5 15 25 35 45 55 i shdn (a) input voltage (v) shutdown current vs supply voltage toc2 +85 c +25 c - 40 c 0 0.5 1 1.5 2 2.5 -50 -25 0 25 50 75 100 125 150 i shdn ( a) temperature ( c) shutdown supply current vs. temperature toc3 v in = 24v v in = 48v v in = 60v v in = 12v v in = 6v +25 c 4.93 4.94 4.95 4.96 4.97 4.98 4.99 5 5.01 5.02 5.03 -40 -15 10 35 60 85 110 output voltage (v) temperature ( ) output voltage vs . temperature toc7 i load = 1ma i load = 5ma 100mv/div 50ma/div toc8 200s/div v out (ac) i out load transient response, load current stepped from 1 m a to 50 m a 8 5 8 7 8 9 9 1 9 3 9 5 - 4 0 0 4 0 8 0 1 2 0 pg o o d t h r e s h o l d ( % ) te m p e r a tu r e ( o c ) p g o od t h r e s h o l d t e m p e r a t u r e t o c 4 f a l l i n g v s . r is i n g 0 100 200 300 400 500 600 700 0 20 40 60 80 100 v dropout ( m v ) output current(ma) dropout voltage vs. load current toc5 +25 c - 40c 85c v in = 4.5v 4.96 4.97 4.98 4.99 5 5.01 5 15 25 35 45 55 output voltage (v) input voltage (v) output voltage vs. input voltage toc6 i out = 0ma i out = 1ma maxim integrated 3 typical operating characteristics MAX17651 60v, 100ma, ultra-low quiescent current, linear regulator www.maximintegrated.com
(v in = 6v, v out = 5v, c out = 4.7f t a = +25c, unless otherwise noted. 5v/div 50ma/div toc14 200s/div en i out startup response with enable and 100ma load v out pgood 2v/div 5v/div 5v/div 50ma/div toc12 200s/div v in i out start up response with 100ma load v out pgood 2v/div 5v/div toc15 power supply rejection ratio frequency (hz ) psrr (db) v in = 7v v out = 5v i out = 100ma 5v/div toc13 200s/div en startup response with enable (no load) v out pgood 2v/div 5v/div 50mv/div 50ma/div toc9 200s/div v out (ac) i out load transient response, load current stepped from 50 m a to 100 m a 5 v / d i v 1 0 0 m v / d i v t oc 10 4 0 s/ d i v v i n v o u t ( a c ) i n p u t - v o l t a g e s t e p r e s p o n s e w i t h 1 0 0 ma l o a d c u r r e n t 6v 14v 5v/div toc11 200s/div v in startup response with no load v out pgood 2v/div 5v/div maxim integrated 4 typical operating characteristics (continued) MAX17651 60v, 100ma, ultra-low quiescent current, linear regulator www.maximintegrated.com
pin name function 1 en active-high, enable input. force en high (or connect to in) to turn the regulator on. pull en to gnd to place the device in a low-power shutdown mode. 2 gnd ground. connect gnd to the ground plane. 3 in power-supply input. decouple to gnd with a 0.1f capacitor; place the capacitor close to the in and gnd pins. 4 out regulator output. connect at least 4.7f, 0805 capacitor from out to gnd. 5 pgood open-drain pgood output. pull up pgood to an external power supply. pgood pulls low if fb drops below 89% of its set value. pgood goes high after fb rises above 92% of its set value. the pgood pin can be left foating if not used. 6 fb output feedback connection. connect fb to a resistor divider between v out and gnd to adjust the output voltage from 0.6v to 59v. figure 1. block diagram t s o t top v ie w max 17651 i n 1 2 gn d e n 3 ou t 6 5 fb p good 4 + en fet driver with current limit ref = 0 . 6 v pgood fb out gnd control logic thermal protection bandgap in max 17651 maxim integrated 5 pin confguration functional diagram pin description MAX17651 60v, 100ma, ultra-low quiescent current, linear regulator www.maximintegrated.com
detailed description the MAX17651 ultra-low quiescent current, high-voltage linear regulator is ideal for use in industrial and battery- operated systems. the device operates from a 4v to 60v input voltage, delivers up to 100ma of load current and consumes only 8a of quiescent current at no load. the device consumes only 0.9a current when in shutdown. output voltage is adjustable from 0.6v to 59v voltage range. feedback voltage accuracy is 2% over temperature. an open-drain, active-low pgood pin provides a power- good signal to the system upon achieving successful regulation of the output voltage. the device also incorporates an enable pin (en) that allows the user to turn the part on or off. the device has a thermal shutdown feature that shuts down the part when the die temperature exceeds 165c. the MAX17651 operates over the -40c to +125c industrial temperature range and is available in a compact, 6-lead tsot package. en input en is an active-high, logic-level enable input that turns the device on or off. drive en high to turn the device on. while in shutdown, the device consumes only 0.9a (typ). en withstands voltages up to v in + 0.3v, allowing it to be driven by high input-level voltages, or be connected to in for always-on operation. thermal protection when the junction temperature exceeds +165c, an internal thermal sensor turns the pass transistor off, allowing the device to cool. the thermal sensor turns the pass transistor on again after the junction temperature cools by 15c. this results in a cycled output during continuous thermal-overload conditions. thermal protection protects the MAX17651 in the event of fault conditions. output short-circuit current limit the MAX17651 features a 140ma (typ) current limit. the output can be shorted to gnd for an indefinite period without damage to the device. during a short-circuit event, the power dissipated across the internal pass transistor can quickly heat the device. when the die tem - perature reaches +165c, the MAX17651 shuts down and automatically restarts once the die temperature cools by 15c. applications information output voltage setting the output voltage can be programmed from 0.6v to 59v. set the output voltage by connecting a resistor divider from output to fb to gnd. choose r2 = 59k, then calculate r1 with the following equation: r1 = 98.3 x (v out - 0.6)k? output capacitor selection if the output voltage is less than 1.8v, use a low-esr 10f(min) 0805 ceramic output capacitor for good load transient response. if the output voltage is greater than or equal to 1.8v, use a low-esr 4.7f(min) 0805 ceramic output capacitor. figure 2. setting the output voltage v out fb r 1 r 2 gnd maxim integrated 6 MAX17651 60v, 100ma, ultra-low quiescent current, linear regulator www.maximintegrated.com
available output current calculation ensure that the junction temperature of the MAX17651 does not exceed +125c under the operating conditions specified for the power supply. at a particular operating condition, the power loss that leads to the temperature rise of the part is estimated as follows: p loss = (v in - v out ) x i load where v in is the input voltage, v out is the output voltage, and i load is the load current. for a multilayer board, the thermal performance metrics for the package are given below: ja = 110c/w the junction temperature of the MAX17651 can be estimated at any given maximum ambient temperature (t a_max ) from the equation below: t j = t a_max + ( ja x p loss ) calculate the maximum allowable output current, using the following formula: (max) a_max load in out (125 t ) i 110 (v v ) ? = ? example: t a_max = +70c, v in = 24v, v out = 5v (max) load (125 70) i 26ma 110 (24 5) ? ? = ? part temp range pin-package MAX17651azt+ -40c to +125c 6 pin tsot package type package code outline no. land pattern no. 6 tsot z6+1 21-0114 90-0242 v out r 1 432 n 5 v r 2 59 n c out 4 . 7 ) pgood out fb c in 0 . 1 ) en in gnd v out 5 . 5 972 60 v max 17651 figure 3. application circuit for 5v output maxim integrated 7 chip information process: bicmos ordering information package information for the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. typical application circuit MAX17651 60v, 100ma, ultra-low quiescent current, linear regulator www.maximintegrated.com
revision number revision date description pages changed 0 11/14 initial release 1 3/16 updated electrical characteristics table and typical operating characteristics section 1C4, 6, 7 ? 2016 maxim integrated products, inc. 8 revision history maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and specifcations without notice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. MAX17651 60v, 100ma, ultra-low quiescent current, linear regulator for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com.
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