AVAILABLE
Functional Diagrams
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
Dual High-Speed 1.5A MOSFET Drivers
Ordering Information continued on end of data sheet.
*Dice are tested at TA = +25°C.
**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 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/
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: 4Ω vs. 7Ω
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
200µA with Logic 0 Input
S TTL/CMOS Compatible
S Latchup Protected-Withstand > 500mA Reverse
Current
S ESD Protected
Ordering Information
1N.C. 8
2, 4 7, 5
TOP VIEW
INVERTING
N.C.
2INA 7 OUTA
3GND 6 VDD
4INB 5 OUTB
OUTA
DIP/SO
1N.C. 8
2, 4 7, 5
NONINVERTING
N.C.
2INA 7 OUTA
3GND 6 VDD
4INB 5 OUTB
DIP/SO
1N.C. 8 2 7
N.C.
2INA 7
3GND 6 VDD
4INB 5 OUTB
4 5
DIP/SO
MAX4426
MAX4427
MAX4428
4.7µF 0.1µF
INPUT
INPUT
OUTPUT*
OUTPUT*
A
B
V
DD
= +18V
MAX4426
PART TEMP RANGE PIN-PACKAGE
MAX4426CPA 0NC to +70NC8 Plastic DIP
MAX4426CSA 0NC to +70NC8 SO
MAX4426C/D 0NC to +70NCDice*
MAX4426EPA -40NC to +85NC8 Plastic DIP
MAX4426ESA -40NC to +85NC8 SO
MAX4426EJA -40NC to +85NC8 CERDIP
MAX4426MJA -55NC to +125NC8 CERDIP**
19-0132; Rev 2; 6/06
MAX4426/
MAX4427/MAX4428
Dual High-Speed 1.5A MOSFET Drivers
Supply Voltage VDD to GND .............................................. +20V
Time VIL < VIN_ < VIH ......................................................... 50ns
Input Voltage .....................................VDD + 0.3V to GND - 0.3V
Continuous Power Dissipation (TA = +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C) ............727mW
SO (derate 5.88mW/°C above +70°C) ........................471mW
CERDIP (derate 8.00mW/°C above +70°C) ................640mW
Operating Temperature Ranges:
MAX442_C_ _ ..................................................... 0°C to +70°C
MAX442_E_ _ .................................................. -40°C to +85°C
MAX442_MJA .............................................. -550°C to +125°C
Storage Temperature Range ............................ -55°C to +160°C
Maximum Chip Temperature ...........................................+150°C
Lead Temperature (soldering, 10 sec) ...........................+300°C
ELECTRICAL CHARACTERISTICS
(VDD = +4.5V to +18V, TA = TMIN to TMAX, 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 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.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Logic 1 Input Voltage VIH 2.4 V
Logic 0 Input Voltage VIL 0.8 V
Input Current IIN VIN = 0V to 18V -1 1 µA
Output High Voltage VOH No load VDD -
25 mV
Output Low Voltage VOL No load 25 mV
Output Resistance ROUT
VDD = 18V,
ILOAD =
10mA
VIN = 0.8V for
inverting stages,
VIN = 2.4V for
noninverting
stages
TA = +25NC4 10
ω
TA = TMIN to
TMAX 5 12
VIN = 2.4V for
inverting stages,
VIN = 0.8V for
noninverting
stages
TA = +25NC4 10
TA = TMIN to
TMAX 5 12
Peak Output Current IPK VDD = 18V 1.5 A
Power-Supply Current ISUPP
VIN = +3V for both
inputs
TA = +25NC1.8 4.5
mA
TA = TMIN to TMAX 2.5 8.0
VIN = 0V for both
inputs
TA = +25NC0.2 0.4
TA = TMIN to TMAX 0.3 0.6
Rise Time (Note 1) tRTA = +25NC20 30 ns
TA = TMIN to TMAX 25 40
Fall Time (Note 1) tFTA = +25NC20 30 ns
TA = TMIN to TMAX 25 40
Delay Time (Note 1)
tD1 TA = +25NC10 30 ns
TA = TMIN to TMAX 15 40
tD2 TA = +25NC25 50 ns
TA = TMIN to TMAX 30 60
MAX4426/MAX4427/MAX4428
2
Maxim Integrated
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)
908060 7020 30 40 5010
0.3
0.6
0
0 100
TA = +25°C VDD = +8V
VDD = +18V
VDD = +13V
MAX4426 OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
MAX4426/27/28 toc08
SOURCE CURRENT (mA)
(VDD - VOUT) (V)
908060 7020 30 40 5010
0.3
0.6
0
0 100
TA = +25°C VDD = +8V
VDD = +18V
VDD = +13V
MAX4426 SUPPLY CURRENT
vs. FREQUENCY
MAX4426/27/28 toc07
FERQUENCY (kHz)
SUPPLY CURRENT (mA)
10010
10
20
30
0
1 1000
TA = +25°C
CL = 1000pF
VDD = +18V
VDD = +10V
VDD = +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
TA = +25°C
VDD = +18V
tR, tF
MAX4426 SUPPLY CURRENT
vs. CAPACITIVE LOAD
MAX4426/27/28 toc05
CAPACITIVE LOAD (pF)
SUPPLY CURRENT (mA)
1000100
10
20
30
40
50
60
70
80
0
10 10,000
TA = +25°C
VDD = +16V
400kHz
200kHz
20kHz
MAX4426 DELAY TIME
vs. TEMPERATURE
MAX4426/27/28 toc04
TEMPERATURE (°C)
TIME (ns)
7525-25
5
15
25
35
10
20
30
0
125500-50 100
CL = 1000pF
VDD = +18V
tD2
tD1
MAX4426 RISE AND FALL TIME
vs. TEMPERATURE
MAX4426/27/28 toc03
TEMPERATURE (°C)
TIME (ns)
7525-25
10
20
30
40
0
125500-50 100
CL = 1000pF
VDD = +18V
tR, tF
MAX4426 DELAY TIME
vs. SUPPLY VOLTAGE
MAX4426/27/28 toc02
SUPPLY VOLTAGE (V)
TIME (ns)
15105
10
20
30
40
50
60
70
0
20
CL = 1000pF
TA = +25°C
tD2
tD1
MAX4426 RISE AND FALL TIME
vs. SUPPLY VOLTAGE
MAX4426/27/28t oc01
SUPPLY VOLTAGE (V)
TIME (ns)
15105
10
20
30
40
50
60
70
0
20
CL = 1000pF
TA = +25°C
tF
tR
Maxim Integrated
3
MAX4426/MAX4427/MAX4428
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 VIH and VIL 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 4.7µF (low ESR)
capacitor in parallel with a 0.1µF 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 5Ω to 20Ω 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) (rON(MAX)) (ILOAD2)
where D is the percentage of time the MAX4426/
MAX4427/MAX4428 output pulls high, rON(MAX)
is the MAX4426/MAX4427/MAX4428 maximum on
resistance, and ILOAD is the MAX4426/MAX4427/
MAX4428 load current.
For capacitive loads. the power dissipation is:
P = (CLOAD) (VDD2) (FREQ)
where CLOAD is the capacitive load. VDD is the MAX4426/
MAX4427/MAX4428 supply voltage, and FREQ is the
toggle frequency.
MAX4426/MAX4427/MAX4428
4
Maxim Integrated
Dual High-Speed 1.5A MOSFET Drivers
Figure 1. Inverting and Noninverting Test Circuit
Ordering Information (continued)
Chip Topography
*Dice are tested at TA = +25°C.
**Contact factory for availability and processing to MIL-STD-883.
SUBSTRATE CONNECTED TO VDD;
TRANSISTOR COUNT: 26.
MAX4427/MAX4428
OUTPUT
VDD = +18V
OUTPUT
INPUT
INPUT
1000pF
0.1µF4.7µF
1000pF
+0.4V
+5V 90%
INPUT RISE
AND FALL
TIMES = 5ns
INVERTING
OUTPUT
NONINVERTING
OUTPUT
INPUT
tD1 tD2
tR
tF
tF
tR
+18V
0V
+18V
0V
10%
tD1 tD2
10%
90%
90%
10%
90%
10%
10%
90%
MAX4428
PART TEMP RANGE PIN-PACKAGE
MAX4427CPA 0NC to +70NC8 Plastic DIP
MAX4427CSA 0NC to +70NC8 SO
MAX4427C/D 0NC to +70NCDice*
MAX4427EPA -40NC to +85NC8 Plastic DIP
MAX4427ESA -40NC to +85NC8 SO
MAX4427EJA -40NC to +85NC8 CERDIP
MAX4427MJA -55NC to +125NC8 CERDIP**
MAX4428CPA 0NC to +70NC8 Plastic DIP
MAX4428CSA 0NC to +70NC8 SO
MAX4428C/D 0NC to +70NCDice*
MAX4428EPA -40NC to +85NC8 Plastic DIP
MAX4428ESA -40NC to +85NC8 SO
MAX4428EJA -40NC to +85NC8 CERDIP
MAX4428MJA -55NC to +125NC8 CERDIP**
Maxim Integrated
5
MAX4426/MAX4427/MAX4428
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
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