19-0863; Rev 1; 8/96 SUA ALSVI Dual Power MOSFET Drivers The MAX626/7/8 are dual monolithic power MOSFET drivers designed to translate TTL inputs to high voltage/current outputs. The MAX626 is a dual invert- ing power MOSFET driver. The MAX627 is a dual non-inverting power MOSFET driver, and the MAX628 contains one inverting section and one non-inverting section. Delay times are nearly independent of Vop (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 rail. This produces the power MOSFETs minimum ON resistance. The MAX626/7/8s high speed minimizes power losses in switching power supplies and DC-DC converters. Switching Power Supplies DC-DC Converters Motor Controllers Pin Diode Drivers Charge Pump Voltage Inverters Top View General Description Features @ Improved Second Source For TSC426/7/8 @ Fast Rise and Fall Times: Typically 20ns with 1000pF Load @ Wide Supply Range: Vpp = 4.5 to 18 Volts @ Low Power Consumption: 7mW with inputs Low 150mW with Inputs High @ TTL/CMOS Input Compatible @ Low Rout: Typically 4Q @ MAX626 is Pin Equivalent to TSC426, DS0026/DS0056 Applications Ordering Information PART TEMP.RANGE _PIN-PACKAGE MAX626CPA OC to +70C 8 Lead Plastic DIP | MAx626CSA OC to +70C 8 Lead SO MAX626C/D C to +70C Dice MAX626MJA -55C to +125C 8 Lead CERDIP MAX627CPA OC to +70C 8 Lead Plastic DIP MAX627CSA OC to +70C 8 Lead SO MAX627C/D C to +70C Dice . . . MAX627MJA -55C to +125C 8 Lead CERDIP Pin Configurations MAX628CPA OCto+70C __*B Lead Plastic DIP MAX628CSA C to +70C 8 Lead SO MAX628C/D 0C to +70C Dice MAX628MJA -55C to +125C 8 Lead CERDIP TSC426CPA C to +70C 8 Lead Plastic DIP 24 75 TSC426CBA 0C to +70C 8 Lead SO TSC426MJA -55C to+125C 8 Lead CERDIP INVERTING TSC427CPA C to +70C 8 Lead Plastic DIP TSC427CBA OC to +70C 8 Lead SO TSC427MJA -55C to +125C 8 Lead CERDIP TSC428CPA 0C to +70C 8 Lead Plastic DIP 24 > 7S. TSC428CBA OC to +70C 8 Lead SO TSC428MJA -55C to+125C 8 Lead CERDIP NON-INVERTING 2p So2 > MAXIM Maxim Integrated Products 1 For free samples & the latest literature: http:/jvww.maxim-ic.com, or phone 1-800-998-8800 8/L/9EVISL-8/L/9T9XVNMAX626/7/8-TSC426/7/8 Dual Power MOSFET Drivers ABSOLUTE MAXIMUM RATINGS Supply Voltage Vpp to GND .......... ccc eee eee +20V CERDIP (derate above 70C Input Voltage ............ cee ee Vpp +0.3V to GND -0.3V by BOMW/C) 22. cece eee eee eee 640mW Package Dissipation Maximum Chip Temperature .................006% +150C Plastic DIP (derate above 70C Storage Temperature ................- -55C to +160C by 6.25MW/PC) oo. ccc cece eee e eee eee e nee 500mW Lead Temperature (10 seconds) .................. +300C Small Outline (derate above 70C by 5.88MW/C) ooo. ccc cece eee eee 450mW Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operational sections of the specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICSMAX626/7/8 and TSC426/7/8 (Vop = 4.5V to 18V, Over Temperature unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX | UNITS Logic 1 Input Voltage Vin 2.4 Vv Logic 0 Input Voltage Vit 0.8 Vv Vin = OV to 18V, Ta = 25C -1 1 Input Current lin Vin = OV to 18V 10 10 uA Output High Voltage Von No Load Vpp -25 V Output Low Voltage Voi No Load +25 mV Vop = 18V, Ta = 25C =| MAX626/7/8 4 15 Rout loan = 10mA TSC426/7/8 10 15 (Note 1) | Vpp = 18V Over Temp | MAX626/7/8 6 20 Output Resistance lLoap = 10mMA TSC426/7/8 13 20 0 Vop = 18V, Ta = 25C | MAX626/7/8 4 10 Rout ILoap = 10mMA TSC426/7/8 6 10 (Note 2) | Vop = 18V Over Temp | MAX626/7/8 6 15 loan = 10mA TSC426/7/8 8 15 MAX626/7/8, Von = 18V 2 Peak Output Current Ipx TSC426/7/8, Vop = 18V 15 A Vin = +3V both inputs, Ta = 25C 8 Vin = +3V both inputs 12 Power Supply Current Isupe | Wy = +0V both inputs, Ta = 25C 0.4 mA Vin = +0V both inputs 0.6 Rise Ti tr Ta = 25C 20 30 e lime (Note 3) | Over Temp MAX626/7/8 25 40 TSC426/7/8 25 60 . tr Ta = 25C 20 30 Fall Time (Note 3) | Over Temp 25 40 Ta = 25C MAX626/7/8 20 30 Delay Time tor TSC-426/7/8 20 40 { ns (Note 3) | Over Temp MAX626/7/8 25 40 TSC426/7/8 25 60 Ta = 25C MAX626/7/8 25 50 ; tp TSC426/7/8 25 75 Delay Time N (Note 3) | Over Temp MAX626/7/8 30 60 TSC426/7/8 30 120 Note 1: Vin = 0.8V for inverting stages, Vin = 2.4V for non-inverting stages. Note 2: Vin = 2.4V for inverting stages, Vin = 0.8V for non-inverting stages. Note 3: Switching times guaranteed by design, not tested. 2 MAALSVIDual Power MOSFET Drivers TIME (ns) TIME (ns) SUPPLY CURRENT (mA) MAAINVI 0 -55 RISE AND FALL TIME vs. SUPPLY VOLTAGE MAX626 Ci = 1000pF Ta = 25C 5 10 15 20 SUPPLY VOLTAGE (V) DELAY TIME vs. TEMPERATURE MAX626 To2 Ci = 1000pF = 18V To. -28 0 25 50 75 100 125 TEMPERATURE (C) SUPPLY CURRENT vs. FREQUENCY Vpp = 18V 10 100 1000 FREQUENCY (kHz) SUPPLY CURRENT (mA) TIME (ns} Nop - Yout|() 0.3 DELAY TIME vs. SUPPLY VOLTAGE Cy = 1000pF Ta = 25C 0 65 10 a) 20 SUPPLY VOLTAGE (V) SUPPLY CURRENT vs. CAPACITIVE LOAD MAX626 Ta = 25C Vop = 18V 10 100 1000 10000 CAPACITIVE LOAD (pF) HIGH OUTPUT VOLTAGE MAX626 Ta = 25C Von = 8V 0 0 10 20 30 40 50 60 70 80 90 100 CURRENT SOURCED (mA) TIME (ns) TIME (ns) OUTPUT VOLTAGE (V) Typical Operating Characteristics RISE AND FALL TIME vs. TEMPERATURE 40 MAX626 Cy = 1000pF = 18V 0 -55 -25 0 25 50 75 100 125 TEMPERATURE (C) RISE AND FALL TIME vs. CAPACITIVE LOAD MAX626 Ta = 25C = 18V 10 100 1000 10000 CAPACITIVE LOAD (pF) LOW OUTPUT VOLTAGE 0.6 MAX626 Ta = 25C Vpp = 8V 0.3 0 0 10 20 30 40 50 60 70 80 90 100 SINK CURRENT (mA) 8/L/9EPISL-8/L/9C9XVANMAX626/7/8-TSC426/7/8 Dual Power MOSFET Drivers Application Hints The MAX626/7/8 have an easy to drive input, however, the input must never be allowed to stay between V, and Vi_ for more than 50ns. Unused inputs should always be connected to ground to minimize supply current. Drivers can be paralleled on the MAX626 or MAX627 by tying both inputs together and both outputs together. Supply bypassing and grounding are extremely impor- tant with the MAX626/7/8 as the peak supply and output currents can be greater than 2 Amps. Ground drops are a form of negative feedback with inverters and, hence, will degrade the delay and transition time of the MAX626/8. Ringing may also be a problem with large dV/dt and/or large AC currents. Suggested bypass capacitors are a 4.7uF (low ESR) capacitor in parallel with a 0.1uF ceramic capacitor, mounted as close as possible to the MAX626/7/8. Use a ground plane if possible, or separate ground returns for inputs and outputs. Ringing can be minimized with a 5-200 resistor in series with the output but this may degrade output transition time. Vop = 18V Taal + Ty MAX628 = INPUT -f>o_} 9 OUTPUT A =p 1000pF inpuT +__f>_} > output B T 1000pF INPUT INPUT RISE = 55V AND FALL TIMES = Sns_y ay 18V INVERTING OUTPUT NON- 18V => ~~ INVERTING OUTPUT Figure 1. Inverting and Non-inverting Test Circuit _.ss Power Dissipation Power dissipation of the MAX626/7/8 consists of: 1) Input inverter losses; 2) Crowbar current through the output devices; 3) Output current (either capacitive or resistive). The sum of these must be kept below the maximum power dissipation limit. The DC input inverter losses are 0.4mA when both inputs are low and 4mA when both inputs are high. The Crowbar current through an output device mak- ing a transition is approximately 100mA for a few nanoseconds. This is a smail portion of the total supply current, except for high switching frequencies or a small load capacitance (100pF). The MAX626/7/8 power dissipation when driving a ground referenced resistive load is: P = D Ronamaxy * !Loap? where D is the percentage of time the MAX626/7/8 output pulls high, Ronwmax) is the maximum on resist- ance of the inverting Sections of MAX626/8 with Vy = Vin (Vin = Vit for non-inverting sections), the lLoap is the load current of the MAX626/7/8. For capacitive loads, the power dissipation is: P= CLoap x Vop2 x FREQ where C.oap is the capacitive load, Vop is the MAX626/7/8 supply voltage, and FREQ is fhe toggle frequency. Chip Topography OUT, INa (OUT, FOR MAX627) OUTp (OUTp FOR MAX626) 0.076" (193mm) t 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. 4 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 1996 Maxim Integrated Products Printed USA MAXIMA js a registered trademark of Maxim Integrated Products.