19-3346; Rev 1; 9/05
4A, 20ns, MOSFET Driver
General Description
The MAX5078A/MAX5078B high-speed MOSFET drivers
source and sink up to 4A peak current. These devices
feature a fast 20ns propagation delay and 20ns rise and
fall times while driving a 5000pF capacitive load.
Propagation delay time is minimized and matched
between the inverting and noninverting inputs. High
sourcing/sinking peak currents, low propagation delay,
and thermally enhanced packages make the MAX5078A/
MAX5078B ideal for high-frequency and high-power
circuits.
The MAX5078A/MAX5078B operate from a 4V to 15V
single power supply and consume 40µA (typ) of supply
current when not switching. These devices have an
internal logic circuitry that prevents shoot-through during
output state changes to minimize the operating current
at a high switching frequency. The logic inputs are pro-
tected against voltage spikes up to +18V, regardless of
the V
DD
voltage. The MAX5078A has CMOS input logic
levels while the MAX5078B has TTL-compatible input
logic levels.
The MAX5078A/MAX5078B feature both inverting and
noninverting inputs for greater flexibility in controlling the
MOSFET. They are available in a 6-pin TDFN (3mm x
3mm) package and operate over the automotive temper-
ature range of -40°C to +125°C.
♦
4V to 15V Single Power Supply
♦
4A Peak Source/Sink Drive Current
♦
20ns (typ) Propagation Delay
♦
Matching Delay Between Inverting and
Noninverting Inputs
♦
V
DD
/ 2 CMOS (MAX5078A)/TTL (MAX5078B) Logic
Inputs
♦
0.1 x V
DD
(CMOS) and 0.3V (TTL) Logic-Input
Hysteresis
♦
Up to +18V Logic Inputs (Regardless of V
DD
Voltage)
♦
Low Input Capacitance: 2.5pF (typ)
♦
40µA (typ) Quiescent Current
♦
-40°C to +125°C Operating Temperature Range
♦
6-Pin TDFN Package
Features
MAX5078
Ordering Information
PART
MAX5078AATT
MAX5078BATT
TEMP
RANGE
-40°C to
+125°C
-40°C to
+125°C
PIN-
PACKAGE
6 TDFN-EP*
6 TDFN-EP*
TOP
MARK
AHL
AHM
PKG
CODE
T633-1
T633-1
Applications
Power MOSFET Switching
Switch-Mode Power Supplies
DC-DC Converters
Motor Control
Power-Supply Modules
*EP
= Exposed pad.
Selector Guide
PART
MAX5078AATT
MAX5078BATT
PIN-PACKAGE
6 TDFN-EP
6 TDFN-EP
LOGIC INPUT
V
DD
/ 2 CMOS
TTL
Typical Operating Circuit
4V TO 15V
V
DD
Pin Configuration
TOP VIEW
MAX5078
MAX5078A
MAX5078B
IN+
OUT
N
IN-
1
6
IN+
GND
2
5
OUT
GND 3
PWM IN
IN-
GND
4
V
DD
TDFN-EP
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
4A, 20ns, MOSFET Driver
MAX5078
ABSOLUTE MAXIMUM RATINGS
(Voltages referenced to GND.)
V
DD
..............................................................................-0.3V to +18V
IN+, IN- ........................................................................-0.3V to +18V
OUT .................................................................-0.3V to (V
DD
+ 0.3V)
OUT Short-Circuit Duration.......................................................10ms
Continuous Source/Sink Current at OUT_ (P
D
< P
DMAX
).....200mA
Continuous Power Dissipation (T
A
= +70°C)
6-Pin TDFN-EP (derate 18.2mW/°C above +70°C) .......1454mW
Junction-to-Case Thermal Resistance (θ
JC
) .......................8.5°C/W
Operating Temperature Range..............................-40°C to +125°C
Storage Temperature Range .................................-65°C to +150°C
Junction Temperature ...........................................................+150°C
Lead Temperature (soldering, 10s)......................................+300°C
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
(V
DD
= 4V to 15V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V
DD
= 15V and T
A
= +25°C.)
(Note 1)
PARAMETER
POWER SUPPLY
V
DD
Operating Range
V
DD
Undervoltage Lockout
V
DD
Undervoltage Lockout
Hysteresis
V
DD
Undervoltage Lockout to
Output Delay
V
DD
Supply Current
DRIVER OUTPUT (SINK)
Driver Output Resistance Pulling
Down
Peak Output Current (Sinking)
Output-Voltage Low
Latchup Protection
DRIVER OUTPUT (SOURCE)
Driver Output Resistance Pulling
Up
Peak Output Current (Sourcing)
V
DD
= 15V,
I
OUT
= 100mA
V
DD
= 4.5V,
I
OUT
= 100mA
T
A
= +25°C
T
A
= +125°C
T
A
= +25°C
T
A
= +125°C
1.5
1.9
2.75
3.75
4
2.1
2.75
4
5.5
A
Ω
I
LUP
V
DD
= 15V,
I
OUT
= -100mA
V
DD
= 4.5V,
I
OUT
= -100mA
T
A
= +25°C
T
A
= +125°C
T
A
= +25°C
T
A
= +125°C
V
DD
= 4.5V
V
DD
= 15V
400
1.1
1.5
2.2
3.0
4
0.45
0.24
1.8
2.4
3.3
4.5
A
V
mA
Ω
I
DD
I
DD-SW
V
DD
rising
IN+ = 0V, IN- = V
DD
(not switching)
V
DD
= 4V
V
DD
= 15V
0.5
V
DD
UVLO
V
DD
rising
4
3.00
3.5
200
12
28
40
1.2
55
75
2.2
15
3.85
V
V
mV
µs
µA
mA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Switching at 250kHz, C
L
= 0
R
ON-N
I
PK-N
V
DD
= 15V, C
L
= 10,000pF
I
OUT
= -100mA
Reverse current I
OUT
(Note 2)
R
ON-P
I
PK-P
V
DD
= 15V, C
L
= 10,000pF
2
_______________________________________________________________________________________
4A, 20ns, MOSFET Driver
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 4V to 15V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V
DD
= 15V and T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
V
DD
= 4.5V
Output-Voltage High
I
OUT
= 100mA
V
DD
= 15V
LOGIC INPUT
(Note 3)
Logic 1 Input Voltage
V
IH
MAX5078A
MAX5078B (Note 4)
Logic 0 Input Voltage
V
IL
MAX5078A
MAX5078B
Logic-Input Hysteresis
Logic-Input-Current Leakage
Input Capacitance
C
IN
C
L
= 1000pF
OUT Rise Time
t
R
C
L
= 5000pF
C
L
= 10,000pF
C
L
= 1000pF
OUT Fall Time
Turn-On Delay Time
Turn-Off Delay Time
t
F
t
D-ON
t
D-OFF
C
L
= 5000pF
C
L
= 10,000pF
C
L
= 10,000pF (Note 2)
C
L
= 10,000pF (Note 2)
C
L
= 1000pF
OUT Rise Time
t
R
C
L
= 5000pF
C
L
= 10,000pF
C
L
= 1000pF
OUT Fall Time
Turn-On Delay Time
Turn-Off Delay Time
t
F
t
D-ON
t
D-OFF
C
L
= 5000pF
C
L
= 10,000pF
C
L
= 10,000pF (Note 2)
C
L
= 10,000pF (Note 2)
18
18
10
10
V
HYS
MAX5078A
MAX5078B
IN+ = IN- = 0V or V
DD
-1
0.1 x
V
DD
0.3
+0.1
2.5
4
18
32
4
15
26
20
20
7
37
85
7
30
75
35
35
70
70
ns
ns
ns
ns
34
34
ns
ns
ns
ns
+1
µA
pF
0.7 x
V
DD
2.1
0.3 x
V
DD
0.8
V
V
V
MIN
V
DD
-
0.55
V
V
DD
-
0.275
TYP
MAX
UNITS
MAX5078
SWITCHING CHARACTERISTICS FOR V
DD
= 15V
(Figure 1)
SWITCHING CHARACTERISTICS FOR V
DD
= 4.5V
(Figure 1)
_______________________________________________________________________________________
3
4A, 20ns, MOSFET Driver
MAX5078
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 4V to 15V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V
DD
= 15V and T
A
= +25°C.) (Note 1)
PARAMETER
MATCHING CHARACTERISTICS
Mismatch Propagation Delays from
Inverting and Noninverting Inputs to
Output
∆t
ON-OFF
V
DD
= 15V, C
L
= 10,000pF
V
DD
= 4.5V, C
L
= 10,000pF
2
ns
4
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Note 1:
Note 2:
Note 3:
Note 4:
All devices are 100% tested at T
A
= +25°C. Specifications over -40°C to +125°C are guaranteed by design.
Limits are guaranteed by design, not production tested.
The logic-input thresholds are tested at V
DD
= 4V and V
DD
= 15V.
TTL compatible with reduced noise immunity.
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
RISE TIME vs. SUPPLY VOLTAGE
(C
L
= 5000pF)
MAX5078 toc01
FALL TIME vs. SUPPLY VOLTAGE
(C
L
= 5000pF)
MAX5078 toc02
PROPAGATION DELAY TIME,
LOW-TO-HIGH vs. SUPPLY VOLTAGE
(C
L
= 5000pF)
T
A
= +125°C
MAX5078 toc03
60
50
T
A
= +125°C
RISE TIME (ns)
40
30
20
10
T
A
= -40°C
0
4
6
8
10
12
14
T
A
= +25°C
60
50
T
A
= +125°C
FALL TIME (ns)
40
30
20
10
T
A
= -40°C
0
T
A
= +25°C
60
50
PROPAGATION DELAY (ns)
40
T
A
= +25°C
30
20
10
0
T
A
= -40°C
16
4
6
8
10
12
14
16
4
6
8
10
12
14
16
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
PROPAGATION DELAY TIME,
HIGH-TO-LOW vs. SUPPLY VOLTAGE
(C
L
= 5000pF)
MAX5078 toc04
I
DD-SW
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5078 toc05
SUPPLY CURRENT vs. SUPPLY VOLTAGE
90
80
SUPPLY CURRENT (mA)
70
60
50
40
30
20
10
0
100kHz
50kHz
1MHz
500kHz
DUTY CYCLE = 50%
V
DD
= 15V, C
L
= 4700pF
MAX5078 toc06
60
50
PROPAGATION DELAY (ns)
40
30
20
10
0
4
6
8
10
12
14
T
A
= -40°C
T
A
= +25°C
T
A
= +125°C
6
I
DD-SW
SUPPLY CURRENT (mA)
5
4
3
2
1
0
100
DUTY CYCLE = 50%
V
DD
= 15V, C
L
= 0
1MHz
500kHz
100kHz
50kHz
16
4
6
8
10
12
14
16
4
6
8
10
12
14
16
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
4
_______________________________________________________________________________________
4A, 20ns, MOSFET Driver
MAX5078
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
INPUT THRESHOLD VOLTAGE
vs. SUPPLY VOLTAGE
MAX5078 toc07
INPUT THRESHOLD VOLTAGE
vs. SUPPLY VOLTAGE
MAX5078 toc08
SUPPLY CURRENT vs. LOGIC-INPUT
VOLTAGE (INPUT LOW-TO-HIGH)
MAX5078B (TTL INPUT)
V
DD
= 15V
400
SUPPLY CURRENT (µA)
MAX5078 toc09
10
9
INPUT THRESHOLD VOLTAGE (V)
8
7
6
5
4
3
2
1
0
4
6
8
10
12
14
V
IN
FALLING
V
IN
RISING
MAX5078A
(CMOS INPUT)
3.0
INPUT THRESHOLD VOLTAGE (V)
2.5
2.0
1.5
1.0
MAX5078B
(TTL INPUT)
V
IN
RISING
500
300
200
V
IN
FALLING
0.5
0
100
0
4
6
8
10
12
14
16
0
2
4
6
8
10
12
14
16
SUPPLY VOLTAGE (V)
LOGIC-INPUT VOLTAGE (V)
16
SUPPLY VOLTAGE (V)
SUPPLY CURRENT vs. LOGIC-INPUT
VOLTAGE (INPUT HIGH-TO-LOW)
MAX5078 toc10
SUPPLY CURRENT vs. LOGIC-INPUT
VOLTAGE (INPUT LOW-TO-HIGH)
MAX5078 toc11
SUPPLY CURRENT vs. LOGIC-INPUT
VOLTAGE (INPUT HIGH-TO-LOW)
MAX5078A (CMOS INPUT)
V
DD
= 15V
4
SUPPLY CURRENT (mA)
MAX5078 toc12
500
MAX5078B (TTL INPUT)
V
DD
= 15V
400
SUPPLY CURRENT (µA)
5
MAX5078A (CMOS INPUT)
V
DD
= 15V
4
SUPPLY CURRENT (mA)
5
300
3
3
200
2
2
100
1
1
0
0
2
4
6
8
10
12
14
16
LOGIC-INPUT VOLTAGE (V)
0
0
2
4
6
8
10
12
14
16
LOGIC-INPUT VOLTAGE (V)
0
0
2
4
6
8
10
12
14
16
LOGIC-INPUT VOLTAGE (V)
DELAY MISMATCH BETWEEN IN+
AND IN- TO OUT vs. TEMPERATURE
MAX5078 toc13
DELAY MISMATCH BETWEEN IN+
AND IN- TO OUT vs. TEMPERATURE
MAX5078 toc14
LOGIC-INPUT VOLTAGE vs. OUTPUT VOLTAGE
(V
DD
= 4V, C
L
= 5000pF)
MAX5078 toc15
6
OUTPUT FALLING
4
DELAY MISMATCH (ns)
2
0
-2
-4
-6
-50
-25
0
25
50
75
100
OUTPUT RISING
6
4
DELAY MISMATCH (ns)
2
0
-2
-4
-6
OUTPUT FALLING
OUTPUT RISING
IN-
2V/div
OUT
2V/div
MAX5078A (CMOS INPUT)
V
DD
= 4.5V, C
L
= 10,000pF
125
MAX5078A (CMOS INPUT)
V
DD
= 15V, C
L
= 10,000pF
-50
-25
0
25
50
75
100
125
20ns/div
IN+ = V
DD
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
5
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