for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim?s website at www.maxim integrated .com. dual high-speed 1.5a mosfet drivers ordering information continued on end of data sheet. * dice are tested at t a = +25c. ** contact factory for availability and processing to mil-std-883. pin configurations typical operating circuit general description the max4426/max4427/max4428 are dual monolithic mosfet drivers designed to translate ttl/cmos inputs to high voltage/current outputs. the max4426 is a dual inverting power mosfet driver. the max4427 is a dual noninverting power mosfet driver, and the max4428 contains one inverting section and one noninverting section. delay times are nearly independent of v dd (see typical operating characteristics ). high-current output drivers rapidly charge and discharge the gate capacitance of even the largest power mosfets to within millivolts of the supply rails. this produces the power mosfets' minimum on resistance. the max4426/ max4427/max4428's high speed minimizes power loss- es in switching power supplies and dc-dc converters. applications switching power supplies dc-dc converters motor controllers pin-diode drivers charge-pump voltage inverters features s upgrade for tsc4426/tsc4427/tsc4428 s lower on resistance: 4 vs. 7 s shorter delay times: t d1 - 10ns vs. 30ns t d2 - 25ns vs. 50ns s 1.5a peak output current s fast rise and fall times: typically 20ns with 1000pf load s wide operating range: 4.5v to 18v s low power consumption: 1.8ma with logic 1 input 200a with logic 0 input s ttl/cmos compatible s latchup protected-withstand > 500ma reverse current s esd protected ordering information 1 n.c. 8 2, 4 7, 5 top view inverting n.c. 2 ina 7 outa 3 gnd 6 v dd 4 inb 5 outb outa dip/so 1 n.c. 8 2, 4 7, 5 noninverting n.c. 2 ina 7 outa 3 gnd 6 v dd 4 inb 5 outb dip/so 1 n.c. 8 2 7 n.c. 2 ina 7 3 gnd 6 v dd 4 inb 5 outb 4 5 dip/so max4426 max4427 max4428 4.7f 0.1f inputinput output*output* ab v dd = +18v max4426 part temp range pin-package max4426 cpa 0 n c to +70 n c 8 plastic dip max4426csa 0 n c to +70 n c 8 so max4426c/d 0 n c to +70 n c dice* max4426epa -40 n c to +85 n c 8 plastic dip max4426esa -40 n c to +85 n c 8 so max4426eja -40 n c to +85 n c 8 cerdip max4426mja -55 n c to +125 n c 8 cerdip** 19-0132; rev 2; 6/06 max4426/ max4427/max4428 downloaded from: http:/// available
dual high-speed 1.5a mosfet drivers supply voltage v dd to gnd .............................................. +20v time v il < v in_ < v ih ......................................................... 50ns input voltage .....................................v dd + 0.3v to gnd - 0.3v continuous power dissipation (t a = +70c) plastic dip (derate 9.09mw/c above +70c) ............727mw so (derate 5.88mw/c above +70c) ........................471mw cerdip (derate 8.00mw/c above +70c) ................640mw operating temperature ranges: max442_c_ _ ..................................................... 0c to +70c max442_e_ _ .................................................. -40c to +85c max442_mja .............................................. -550c to +125c storage temperature range ............................ -55c to +160c maximum chip temperature ...........................................+150c lead temperature (soldering, 10 sec) ...........................+300c electrical characteristics (v dd = +4.5v to +18v, t a = t min to t max , unless otherwise specified.) absolute maximum ratings note 1: switching times guaranteed by design, not tested. see figure 1 for timing measurement circuit. stresses beyond those listed under ?absolute maximu m ratings? may cause permanent damage to the device . these are stress ratings only, and functional operation of the device at these or any other condi tions beyond those indicated in the operational sec tions of the specifications is not implied. exposur e to absolute maximum rating conditions for extended periods may affect device reliability. parameter symbol conditions min typ max units logic 1 input voltage v ih 2.4 v logic 0 input voltage v il 0.8 v input current i in v in = 0v to 18v -1 1 a output high voltage v oh no load v dd - 25 mv output low voltage v ol no load 25 mv output resistance r out v dd = 18v, i load = 10ma v in = 0.8v for inverting stages, v in = 2.4v for noninverting stages t a = +25 n c 4 10 t a = t min to t max 5 12 v in = 2.4v for inverting stages, v in = 0.8v for noninverting stages t a = +25 n c 4 10 t a = t min to t max 5 12 peak output current i pk v dd = 18v 1.5 a power-supply current i supp v in = +3v for both inputs t a = +25 n c 1.8 4.5 ma t a = t min to t max 2.5 8.0 v in = 0v for both inputs t a = +25 n c 0.2 0.4 t a = t min to t max 0.3 0.6 rise time (note 1) t r t a = +25 n c 20 30 ns t a = t min to t max 25 40 fall time (note 1) t f t a = +25 n c 20 30 ns t a = t min to t max 25 40 delay time (note 1) t d1 t a = +25 n c 10 30 ns t a = t min to t max 15 40 t d2 t a = +25 n c 25 50 ns t a = t min to t max 30 60 max4426/max4427/max4428 2 maxim integrated downloaded from: http:///
dual high-speed 1.5a mosfet drivers typical operating characteristics max4426 output low voltage vs. source current max4426/27/28 toc09 source current (ma) ouput voltage (v) 90 80 60 70 20 30 40 50 10 0.3 0.6 0 0 100 t a = +25c v dd = +8v v dd = +18v v dd = +13v max4426 output high voltage vs. source current max4426/27/28 toc08 source current (ma) (v dd - v out ) (v) 90 80 60 70 20 30 40 50 10 0.3 0.6 0 0 100 t a = +25c v dd = +8v v dd = +18v v dd = +13v max4426 supply current vs. frequency max4426/27/28 toc07 ferquency (khz) supply current (ma) 100 10 10 20 30 0 1 1000 t a = +25c c l = 1000pf v dd = +18v v dd = +10v v dd = +5v max4426 rise and fall time vs. capacitive load max4426/27/28 toc06 capacitive load (pf) time (ns) 100 1000 10 100 1k 0 10 10,000 t a = +25c v dd = +18v t r , t f max4426 supply current vs. capacitive load max4426/27/28 toc05 capacitive load (pf) supply current (ma) 1000 100 10 20 30 40 50 60 70 80 0 10 10,000 t a = +25c v dd = +16v 400khz 200khz 20khz max4426 delay time vs. temperature max4426/27/28 toc04 temperature (c) time (ns) 75 25 -25 5 15 25 3510 20 30 0 125 50 0 -50 100 c l = 1000pf v dd = +18v t d2 t d1 max4426 rise and fall time vs. temperature max4426/27/28 toc03 temperature (c) time (ns) 75 25 -25 10 20 30 40 0 125 50 0 -50 100 c l = 1000pf v dd = +18v t r , t f max4426 delay time vs. supply voltage max4426/27/28 toc02 supply voltage (v) time (ns) 15 10 5 10 20 30 40 50 60 70 0 20 c l = 1000pf t a = +25c t d2 t d1 max4426 rise and fall time vs. supply voltage max4426/27/28t oc01 supply voltage (v) time (ns) 15 10 5 10 20 30 40 50 60 70 0 20 c l = 1000pf t a = +25c t f t r maxim integrated 3 max4426/max4427/max4428 downloaded from: http:///
dual high-speed 1.5a mosfet drivers applications information the max4426/max4427/max4428 have easy-to-drive inputs. however, these inputs must never be allowed to stay between v ih and v il for more than 50ns. unused inputs should always be connected to ground to mini- mize supply current. drivers can be paralleled on the max4426 or max4427 by tying both inputs together and both outputs together. supply bypassing and grounding are extremely impor- tant with the max4426/max4427/max4428, as the peak supply current can be as high as 3a, which is twice the peak output current. ground drops are a form of nega- tive feedback with inverters, and hence will degrade the delay and transition time of the max4426/max4428. suggested bypass capacitors are a 4.7f (low esr) capacitor in parallel with a 0.1f ceramic capaci- tor, mounted as close as possible to the max4426/ max4427/max4428. use a ground plane if possible or separate ground returns for inputs and outputs. output voltage ringing can be minimized with a 5 to 20 resis- tor in series with the output, but this will degrade output transition time. ringing may be undesirable due to the large current that flows through capacitive loads when the voltage across these loads transitions quickly. operation at the upper end of the supply voltage range (> 15v) requires that a capacitance of at least 50pf be present at the outputs. this prevents the supply voltage provided to the die (which can be different from that seen at the supply pin) from exceeding the 20v absolute maximum rating, due to overshoot. since at least 50pf of gate capacitance is present in all higher power fets, this requirement is easily met. power dissipation the max4426/max4427/max4428 power dissipation consists of input inverter losses, crowbar current through the output devices, and output current (either capacitive or resistive). the sum of these must be kept below the maximum power dissipation limit. the dc input inverter supply current is 0.2ma when both inputs are low and 2ma when both inputs are high. the crowbar current through an output device making a tran- sition is approximately 100ma for a few nanoseconds. this is a small portion of the total supply current, except for high switching frequencies or a small load capaci- tance (100pf). the max4426/max4427/max4428 power dissipation when driving a ground-referenced resistive load is: p = (d) (r on(max) ) (i load 2 ) where d is the percentage of time the max4426/ max4427/max4428 output pulls high, r on(max) is the max4426/max4427/max4428 maximum on resistance, and i load is the max4426/max4427/ max4428 load current. for capacitive loads. the power dissipation is: p = (c load ) (v dd 2 ) (freq) where c load is the capacitive load. v dd is the max4426/ max4427/max4428 supply voltage, and freq is the toggle frequency. max4426/max4427/max4428 4 maxim integrated downloaded from: http:///
dual high-speed 1.5a mosfet drivers figure 1. inverting and noninverting test circuit ordering information (continued) chip topography * dice are tested at t a = +25c. ** contact factory for availability and processing to mil-std-883. substrate connected to v dd ; transistor count: 26. max4427/max4428 output v dd = +18v output inputinput 1000pf 0.1f 4.7f 1000pf +0.4v +5v 90% input rise and fall times = 5ns inverting output noninverting output input t d1 t d2 t r t f t f t r +18v 0v +18v 0v 10% t d1 t d2 10% 90% 90% 10% 90% 10% 10% 90% max4428 part temp range pin-package max4427 cpa 0 n c to +70 n c 8 plastic dip max4427csa 0 n c to +70 n c 8 so max4427c/d 0 n c to +70 n c dice* max4427epa -40 n c to +85 n c 8 plastic dip max4427esa -40 n c to +85 n c 8 so max4427eja -40 n c to +85 n c 8 cerdip max4427mja -55 n c to +125 n c 8 cerdip** max4428 cpa 0 n c to +70 n c 8 plastic dip max4428csa 0 n c to +70 n c 8 so max4428c/d 0 n c to +70 n c dice* max4428epa -40 n c to +85 n c 8 plastic dip max4428esa -40 n c to +85 n c 8 so max4428eja -40 n c to +85 n c 8 cerdip max4428mja -55 n c to +125 n c 8 cerdip** maxim integrated 5 max4426/max4427/max4428 downloaded from: http:///
dual high-speed 1.5a mosfet drivers package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline information go to www.maxim-ic.com/packages .) max4426/max4427/max4428 6 maxim integrated downloaded from: http:///
dual high-speed 1.5a mosfet drivers revision history revision number revision date description pages changed 2 6/06 to clarify and illuminate an input logic level restriction ? max4426/max4427/max4428 downloaded from: http:/// 0 d [ l p , q w h j u d w h g 5 l r 5 r e o h v 6 d q - r v h & $ 8 6 $ maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications 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 the maxim logo and maxim integrated are trademarks of maxim integrated products, inc.
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