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PDF MAX5078 Data sheet ( Hoja de datos )
| Número de pieza | MAX5078 | |
| Descripción | MOSFET Driver | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX5078 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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19-3346; Rev 1; 9/05
www.DataSheet4U.com
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 VDD 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.
Power MOSFET Switching
Switch-Mode Power Supplies
DC-DC Converters
Applications
Motor Control
Power-Supply Modules
Typical Operating Circuit
4V TO 15V
VDD
MAX5078A
MAX5078B
IN+ OUT
N
Features
♦ 4V to 15V Single Power Supply
♦ 4A Peak Source/Sink Drive Current
♦ 20ns (typ) Propagation Delay
♦ Matching Delay Between Inverting and
Noninverting Inputs
♦ VDD / 2 CMOS (MAX5078A)/TTL (MAX5078B) Logic
Inputs
♦ 0.1 x VDD (CMOS) and 0.3V (TTL) Logic-Input
Hysteresis
♦ Up to +18V Logic Inputs (Regardless of VDD
Voltage)
♦ Low Input Capacitance: 2.5pF (typ)
♦ 40µA (typ) Quiescent Current
♦ -40°C to +125°C Operating Temperature Range
♦ 6-Pin TDFN Package
Ordering Information
PART
TEMP
RANGE
MAX5078AATT
-40°C to
+125°C
MAX5078BATT
-40°C to
+125°C
*EP = Exposed pad.
PIN-
PACKAGE
TOP PKG
MARK CODE
6 TDFN-EP* AHL T633-1
6 TDFN-EP* AHM T633-1
Selector Guide
PART
MAX5078AATT
MAX5078BATT
PIN-PACKAGE
6 TDFN-EP
6 TDFN-EP
LOGIC INPUT
VDD / 2 CMOS
TTL
Pin Configuration
TOP VIEW
IN- 1
MAX5078
6 IN+
GND 2
5 OUT
PWM IN
IN- GND
GND 3
4 VDD
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.
1 page  
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4A, 20ns, MOSFET Driver
(TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
INPUT THRESHOLD VOLTAGE
vs. SUPPLY VOLTAGE
10
9 MAX5078A
(CMOS INPUT)
8
7 VIN RISING
6
5
4
3 VIN FALLING
2
1
0
4 6 8 10 12 14
SUPPLY VOLTAGE (V)
16
SUPPLY CURRENT vs. LOGIC-INPUT
VOLTAGE (INPUT HIGH-TO-LOW)
500
MAX5078B (TTL INPUT)
VDD = 15V
400
INPUT THRESHOLD VOLTAGE
vs. SUPPLY VOLTAGE
3.0
MAX5078B
(TTL INPUT)
2.5
2.0 VIN RISING
1.5
1.0
VIN FALLING
0.5
0
4 6 8 10 12 14 16
SUPPLY VOLTAGE (V)
SUPPLY CURRENT vs. LOGIC-INPUT
VOLTAGE (INPUT LOW-TO-HIGH)
5
MAX5078A (CMOS INPUT)
VDD = 15V
4
SUPPLY CURRENT vs. LOGIC-INPUT
VOLTAGE (INPUT LOW-TO-HIGH)
500
MAX5078B (TTL INPUT)
VDD = 15V
400
300
200
100
0
0 2 4 6 8 10 12 14 16
LOGIC-INPUT VOLTAGE (V)
SUPPLY CURRENT vs. LOGIC-INPUT
VOLTAGE (INPUT HIGH-TO-LOW)
5
MAX5078A (CMOS INPUT)
VDD = 15V
4
300 3
3
200 2
2
100 1
1
0
0 2 4 6 8 10 12 14 16
LOGIC-INPUT VOLTAGE (V)
DELAY MISMATCH BETWEEN IN+
AND IN- TO OUT vs. TEMPERATURE
6
OUTPUT FALLING
4
2
0 OUTPUT RISING
-2
-4 MAX5078A (CMOS INPUT)
VDD = 4.5V, CL = 10,000pF
-6
-50 -25 0 25 50
75
TEMPERATURE (°C)
100 125
0
0 2 4 6 8 10 12 14 16
LOGIC-INPUT VOLTAGE (V)
DELAY MISMATCH BETWEEN IN+
AND IN- TO OUT vs. TEMPERATURE
6
4 OUTPUT RISING
2
0
-2 OUTPUT FALLING
-4 MAX5078A (CMOS INPUT)
VDD = 15V, CL = 10,000pF
-6
-50 -25 0 25 50
75
TEMPERATURE (°C)
100 125
0
0 2 4 6 8 10 12 14 16
LOGIC-INPUT VOLTAGE (V)
LOGIC-INPUT VOLTAGE vs. OUTPUT VOLTAGE
(VDD = 4V, CL = 5000pF)
MAX5078 toc15
IN-
2V/div
OUT
2V/div
20ns/div
IN+ = VDD
_______________________________________________________________________________________ 5
5 Page 
www.DataSheet4U.com
4A, 20ns, MOSFET Driver
4V TO 15V
VDD
IN+
MAX5078A
MAX5078B OUT
P
Chip Information
TRANSISTOR COUNT: 258
PROCESS: CMOS
FROM PWM
CONTROLLER
(BOOST)
IN-
GND
VDD
IN+
MAX5078A
MAX5078B OUT
N
VOUT
IN-
GND
Figure 6. MAX5078A/MAX5078B In High-Power Synchronous
Buck Converter
VIN
VOUT
4V TO 15V
VDD
PWM IN
MAX5078
IN+ OUT
IN- GND
VDD
MAX5078
OUT
IN+
GND IN-
VDD
MAX5078
OUT IN+
IN- GND
4V TO 15V
SIGNAL FROM PRIMARY
Figure 7. Forward Converter with Secondary-Side Synchronous Rectification
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX5078.PDF ] | |
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