MCP1407-E/SN Microchip Technology, MCP1407-E/SN Datasheet - Page 10

• Manufacturer Part Number: MCP1407-E/SN
• Description: IC MOSFET DVR 6A 8SOIC
• Manufacturer: Microchip Technology
• Type: High-Speed Power MOSFET Driverr

Specifications of MCP1407-E/SN

• Number Of Outputs: 1
• Package / Case: 8-SOIC (3.9mm Width)
• Configuration: Low-Side
• Input Type: Non-Inverting
• Delay Time: 40ns
• Current - Peak: 6A
• Number Of Configurations: 1
• Voltage - Supply: 4.5 V ~ 18 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Rise Time: 30 ns
• Fall Time: 30 ns
• Supply Voltage (min): 4.5 V
• Supply Current: 0.25 mA
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Number Of Drivers: 1
• Output Current: 6 A
• Output Voltage: +/- 0.025 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• High Side Voltage - Max (bootstrap): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP1406/07
4.0
4.1
MOSFET drivers are high-speed, high current devices
which are intended to provide high peak currents to
charge the gate capacitance of external MOSFETs or
IGBTs. In high frequency switching power supplies, the
PWM controller may not have the drive capability to
directly drive the power MOSFET. A MOSFET driver
like the MCP1406/07 family can be used to provide
additional drive current capability.
4.2
The ability of a MOSFET driver to transition from a fully
off state to a fully on state are characterized by the
drivers rise time (t
delays (t
devices is able to make this transition very quickly.
Figure 4-1 and Figure 4-2 show the test circuits and
timing waveforms used to verify the MCP1406/07 tim-
ing.
FIGURE 4-1:
Waveform.
DS22019A-page 10
Output
Input
+5V
18V
0V
0V
Input
APPLICATION INFORMATION
General Information
MOSFET Driver Timing
D1
10%
and t
90%
V
t
MCP1406
R
D2
D1
10%
DD
), fall time (t
). The MCP1406/07 family of
= 18V
Inverting Driver Timing
t
F
1 µF
F
), and propagation
C
L
t
Output
D2
0.1 µF
Ceramic
= 2500 pF
90%
t
10%
R
90%
FIGURE 4-2:
Waveform.
4.3
Careful layout and decoupling capacitors are highly
recommended when using MOSFET drivers. Large
currents are required to charge and discharge
capacitive loads quickly. For example, 2.25A are
needed to charge a 2500 pF load with 18V in 20 ns.
To operate the MOSFET driver over a wide frequency
range with low supply impedance, a ceramic and low
ESR film capacitor are recommended to be placed in
parallel between the driver V
ESR film capacitor and a 0.1 µF ceramic capacitor
placed between pins 1, 8 and 4, 5 should be used.
These capacitors should be placed close to the driver
to minimized circuit board parasitics and provide a local
source for the required current.
4.4
Proper PCB layout is important in a high current, fast
switching circuit to provide proper device operation and
robustness of design. PCB trace loop area and
inductance should be minimized by the use of a ground
plane or ground trace located under the MOSFET gate
drive signals, separate analog and power grounds, and
local driver decoupling.
Output
Input
+5V
18V
0V
0V
Input
Decoupling Capacitors
PCB Layout Considerations
10%
t
D1
V
MCP1407
DD
90%
= 18V
Non-Inverting Driver Timing
© 2006 Microchip Technology Inc.
10%
1 µF
DD
t
R
and GND. A 1.0 µF low
C
L
Output
= 2500 pF
0.1 µF
Ceramic
t
90%
D2
10%
90%
t
F