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19-0132; Rev 2; 6/06
Dual High-Speed 1.5A MOSFET Drivers
General Description
The MAX4426/4427/4428 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 VDD (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 MAX4426/4427/4428's high speed minimizes power losses in switching power supplies and DC-DC converters. S Upgrade for TSC4426/4427/4428 S Lower On Resistance: 4 vs. 7 S Shorter Delay Times: tD1 - 10ns vs. 30ns tD2 - 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
Features
MAX4426/4427/4428
Applications
Switching Power Supplies DC-DC Converters Motor Controllers Pin-Diode Drivers Charge-Pump Voltage Inverters
Ordering Information
PART MAX4426CPA MAX4426CSA MAX4426C/D MAX4426EPA MAX4426ESA MAX4426EJA
2, 4 7, 5
TEMP RANGE 0NC to +70NC 0NC to +70NC 0NC to +70NC -40NC to +85NC -40NC to +85NC -40NC to +85NC -55NC to +125NC
PIN-PACKAGE 8 Plastic DIP 8 SO Dice* 8 Plastic DIP 8 SO 8 CERDIP 8 CERDIP**
Pin Configurations
TOP VIEW N.C. INA GND INB 1 2 3 4
DIP/SO
8 MAX4426 7 6 5
N.C. OUTA VDD OUTB
INVERTING
MAX4426MJA
Ordering Information continued on last page. *Dice are tested at TA = +25C. **Contact factory for availability and processing to MIL-STD-883.
Typical Operating Circuit
8 N.C. OUTA VDD OUTB
NONINVERTING
N.C. INA GND INB
1 2 3 4
DIP/SO
VDD = +18V 2, 4 7, 5 4.7F 0.1F
MAX4427
7 6 5
MAX4426
8 N.C. OUTA VDD OUTB 4 5 INPUT B 2 7 INPUT A OUTPUT* OUTPUT*
N.C. INA GND INB
1 2 3 4
DIP/SO
MAX4428
7 6 5
_______________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Dual High-Speed 1.5A MOSFET Drivers MAX4426/4427/4428
ABSOLUTE MAXIMUM RATINGS
Supply Voltage VDD to GND .............................................. +20V Time VIL < VIN_ < VIH ......................................................... 50ns Input Voltage .....................................VDD + 0.3V to GND - 0.3V Continuous Power Dissipation (TA = +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
Stresses beyond 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 beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD = +4.5V to +18V, TA = TMIN to TMAX, unless otherwise specified.) PARAMETER Logic 1 Input Voltage Logic 0 Input Voltage Input Current Output High Voltage Output Low Voltage SYMBOL VIH VIL IIN VOH VOL VIN = 0V to 18V No load No load VIN = 0.8V for inverting stages, VIN = 2.4V for noninverting VDD = 18V, stages ILOAD = VIN = 2.4V for 10mA inverting stages, VIN = 0.8V for noninverting stages VDD = 18V VIN = +3V for both inputs VIN = 0V for both inputs TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 4 -1 VDD 25 25 10 CONDITIONS MIN 2.4 0.8 1 TYP MAX UNITS V V A mV mV
5
12
Output Resistance
ROUT
4
10
5 1.5 1.8 2.5 0.2 0.3 20 25 20 25 10 15 25 30
12 A 4.5 8.0 0.4 0.6 30 40 30 40 30 40 50 60 ns ns ns ns mA
Peak Output Current
IPK
Power-Supply Current
ISUPP
Rise Time (Note 1) Fall Time (Note 1)
tR tF tD1
Delay Time (Note 1) tD2
Note 1: Switching times guaranteed by design, not tested. See Figure 1 for timing measuremenl circuit. 2
Dual High-Speed 1.5A MOSFET Drivers
Typical Operating Characteristics
MAX4426 RISE AND FALL TIME vs. SUPPLY VOLTAGE
MAX4426/27/28t oc01
MAX4426/4427/4428
MAX4426 DELAY TIME vs. SUPPLY VOLTAGE
MAX4426/27/28 toc02
MAX4426 RISE AND FALL TIME vs. TEMPERATURE
CL = 1000pF VDD = +18V 30 TIME (ns) tR, tF 20
MAX4426/27/28 toc03
70 60 50 TIME (ns) 40 30 20 10 0 5 10 15 tF tR CL = 1000pF TA = +25C
70 60 50 TIME (ns) 40 30 20 10 0 tD2 tD1 CL = 1000pF TA = +25C
40
10 0
20
5
10
15
20
-50
-25
0
25
50
75
100
125
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
TEMPERATURE (C)
MAX4426 DELAY TIME vs. TEMPERATURE
MAX4426/27/28 toc04
MAX4426 SUPPLY CURRENT vs. CAPACITIVE LOAD
MAX4426/27/28 toc05
MAX4426 RISE AND FALL TIME vs. CAPACITIVE LOAD
TA = +25C VDD = +18V
MAX4426/27/28 toc06
35 30 25 TIME (ns) 20 15 10 5 0 -50 -25 0 25 50 75 100 tD1 CL = 1000pF VDD = +18V tD2
80 70 SUPPLY CURRENT (mA) 60 50 40 30 20 10 0 200kHz TA = +25C VDD = +16V
400kHz
1k
100 TIME (ns) tR, tF 10
20kHz 0 10 100 1000 10,000 10 100 1000 10,000 CAPACITIVE LOAD (pF) CAPACITIVE LOAD (pF)
125
TEMPERATURE (C)
MAX4426 SUPPLY CURRENT vs. FREQUENCY
MAX4426/27/28 toc07
MAX4426 OUTPUT HIGH VOLTAGE vs. SOURCE CURRENT
MAX4426/27/28 toc08
MAX4426 OUTPUT LOW VOLTAGE vs. SOURCE CURRENT
TA = +25C OUPUT VOLTAGE (V) VDD = +8V
MAX4426/27/28 toc09
30 TA = +25C CL = 1000pF SUPPLY CURRENT (mA) 20
0.6 TA = +25C VDD = +8V
0.6
VDD = +18V
(VDD - VOUT) (V)
VDD = +13V 0.3
VDD = +13V 0.3
10
VDD = +10V VDD = +5V
VDD = +18V
VDD = +18V
0 1 10 100 1000 FERQUENCY (kHz)
0 0 10 20 30 40 50 60 70 80 90 100 SOURCE CURRENT (mA)
0 0 10 20 30 40 50 60 70 80 90 100 SOURCE CURRENT (mA)
3
Dual High-Speed 1.5A MOSFET Drivers MAX4426/4427/4428
Applications Information
The MAX4426/4427/4428 have easy-to-drive inputs. However, these inputs must never be allowed to stay between VIH and VIL for more than 50ns. Unused inputs should always be connected to ground to minimize 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 important with the MAX4426/4427/4428, as the peak supply current can be as high as 3A, which is twice the peak output current. Ground drops are a form of negative 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 capacitor, mounted as close as possible to the MAX4426/4427/4428. 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 resistor 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 Ie 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. The MAX4426/4427/4428 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 transition 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 capacitance (100pF). The MAX4426/4427/4428 power dissipation when driving a ground-referenced resistive load is: P = (D) (rON(MAX)) (ILOAD2) where D is the percentage of time the MAX4426/4427/4428 output pulls high, rON(MAX) is the MAX4426/4427/4428 maximum on resistance, and ILOAD is the MAX4426/4427/ 4428 load current. For capacitive loads. the power dissipation is: P = (CLOAD) (VDD2) (FREQ) where CLOAD is the capacItive load. VDD is the MAX4426/4427/4428 supply voltage, and FREO is the toggle frequency.
Power Dissipation
4
Dual High-Speed 1.5A MOSFET Drivers
VDD = +18V 4.7F MAX4428 INPUT OUTPUT 1000pF INPUT OUTPUT 1000pF 0.1F
Ordering Information (continued)
PART MAX4427CPA MAX4427CSA MAX4427C/D MAX4427EPA MAX4427ESA MAX4427EJA MAX4427MJA MAX4428CPA MAX4428CSA
INPUT 90%
MAX4426/4427/4428
TEMP RANGE 0NC to +70NC 0NC to +70NC 0NC to +70NC -40NC to +85NC -40NC to +85NC -40NC to +85NC -55NC to +125NC 0NC to +70NC 0NC to +70NC 0NC to +70NC -40NC to +85NC -40NC to +85NC -40NC to +85NC -55NC to +125NC
PIN-PACKAGE 8 Plastic DIP 8 SO Dice* 8 Plastic DIP 8 SO 8 CERDIP 8 CERDIP** 8 Plastic DIP 8 SO Dice* 8 Plastic DIP 8 SO 8 CERDIP 8 CERDIP**
INPUT RISE AND FALL +5V TIMES = 5ns +0.4V +18V INVERTING OUTPUT 0V +18V NONINVERTING OUTPUT 0V 10% tD1 90%
MAX4428C/D MAX4428EPA MAX4428ESA MAX4428EJA
90%
tD2
MAX4428MJA
10% tF tD1 90% 10% tR 90%
10% tR tD2 10% tF
*Dice are tested at TA = +25C. **Contact factory for availability and processing to MIL-STD-883.
Chip Topography
Figure 1. Inverting and Noninverting Test Circuit
SUBSTRATE CONNECTED TO VDD; TRANSISTOR COUNT: 26. MAX4427/MAX4428
5
Dual High-Speed 1.5A MOSFET Drivers MAX4426/4427/4428
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.)
6
Dual High-Speed 1.5A MOSFET Drivers
Revision History
REVISION NUMBER 2 REVISION DATE 6/06 -- DESCRIPTION PAGES CHANGED --
MAX4426/4427/4428
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
(c)
7
2006 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.

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