lm27222sd National Semiconductor Corporation, lm27222sd Datasheet - Page 2

• Manufacturer Part Number: lm27222sd
• Description: High-speed 4.5a Synchronous Mosfet Driver
• Manufacturer: National Semiconductor Corporation

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Pin #
Connection Diagram
Ordering Information
Pin Descriptions
1
2
3
4
5
6
7
8
Order Number
LM27222SDX
LM27222MX
LM27222SD
LM27222M
Pin Name
GND
LEN
V
SW
HG
CB
LG
IN
CC
LLP-8
SO-8
Size
High-side driver return. Should be connected to the common node of high and low-side MOSFETs.
High-side gate drive output. Should be connected to the high-side MOSFET gate. Pulled down
internally to SW with a 10K resistor to prevent spurious turn on of the high-side MOSFET when the
driver is off.
Bootstrap. Accepts a bootstrap voltage for powering the high-side driver.
Accepts a PWM signal from a controller. Active High. Pulled down internally to GND with a 150K
resistor to prevent spurious turn on of the high-side MOSFET when the controller is inactive.
Low-side gate enable. Active High. Pulled down internally to GND with a 150K resistor to prevent
spurious turn-on of the low-side MOSFET when the controller is inactive.
Connect to +5V supply.
Low-side gate drive output. Should be connected to low-side MOSFET gate. Pulled down internally to
GND with a 10K resistor to prevent spurious turn on of the low-side MOSFET when the driver is off.
Ground.
NSC Drawing #
SDC08A
LLP-8 (NS Package # SDC08A) θ
M08A
SO-8 (NS Package # M08A) θ
Top View
Package Type
Tape and Reel
Tape and Reel
Tape and Reel
or
2
Rail
Pin Function
JA
JA
= 172˚C/W
20117901
= 39˚C/W
2500 Units/Reel
1000 Units/Reel
4500 Units/Reel
Supplied As
95 Units/Rail