Datasheet

© 2011 Microchip Technology Inc. DS25005A-page 11
MCP14E9/10/11
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1 .
3.1 Enable A (ENB_A)
The ENB_A pin is the enable control for Output A. This
enable pin is internally pulled up to V
DD
for active-high
operation and can be left floating for standard opera-
tion. When the ENB_A pin is pulled below the enable
pin, Low Level Input Voltage (V
EN_L
), Output A will be
in the OFF state, regardless of the input pin state.
3.2 Control Inputs A and B (IN A; IN B)
The MOSFET driver inputs are a high-impedance
TTL/CMOS compatible input. The inputs also have
hysteresis between the high and low input levels,
allowing them to be driven from slow rising and falling
signals, and to provide noise immunity.
3.3 Ground (GND)
Ground is the device return pin. The ground pin should
have a low-impedance connection to the bias supply
source return. High peak currents will flow out the
ground pin when the capacitive load is being
discharged.
3.4 Outputs A and B (OUT A; OUT B)
Outputs, A and B, are CMOS push-pull outputs that are
capable of sourcing and sinking 3.0A of peak current
(V
DD
= 18V). The low output impedance ensures the
gate of the MOSFET will stay in the intended state,
even during large transients.
3.5 Supply Input (V
DD
)
V
DD
is the bias supply input for the MOSFET driver and
has a voltage range of 4.5V to 18V. This input must be
decoupled to ground with a local ceramic capacitor.
This bypass capacitor provides a localized low-
impedance path for the peak currents that are provided
to the load.
3.6 Enable B (ENB_B)
The ENB_B pin is the enable control for Output B. This
enable pin is internally pulled up to V
DD
for active-high
operation, and can be left floating for standard opera-
tion. When the ENB_B pin is pulled below the enable
pin, Low-Level Input Voltage (V
EN_L
), Output B will be
in the OFF state, regardless of the input pin state.
3.7 Exposed Metal Pad (EP)
The exposed metal pad of the DFN package is not
internally connected to any potential. Therefore, this
pad can be connected to a ground plane, or other cop-
per plane on a printed circuit board, to aid in heat
removal from the package.
TABLE 3-1: PIN FUNCTION TABLE
PDIP, SOIC,
6x5 DFN
Symbol
Description
MCP14E9 MCP14E10 MCP14E11
1 ENB_A ENB_A ENB_A Ouptut A Enable
2 IN A IN A IN A Input A
3 GND GND GND Ground
4 IN B IN B IN B Input B
5OUT B
OUT B OUT B Output B
6V
DD
V
DD
V
DD
Supply Input
7OUT A
OUT A OUT A Output A
8 ENB_B ENB_B ENB_B Output B Enable
9 EP EP EP Exposed metal pad (DFN package only). Exposed pad is
electrically isolated.