LP1111-04 Jan.-2020 Email: marketing@lowpowersemi.com www.lowpowersemi.com Page 1 of 9
Preliminary Datasheet LP1111
Dual Bootstrapped, 12V MOSFET Driver with Output Enable
General Description
The LP1111 is a single phase 12V MOSFET gate
driver optimized to drive the gates of both high-side
and low-side power MOSFETs in a synchronous buck
converter.
With a wide operating voltage range, high or low side
MOSFET gate drive voltage can be optimized for the
best efficiency. Internal adaptive non-overlap circuitry
further reduces switching losses by preventing
simultaneous conduction of both MOSFETs.
The floating top driver design can accommodate VBST
voltages as high as 35V, with transient voltages as
high as 40V. Both gate outputs can be driven low by
applying a low logic level to the enable(EN) pin. An
undervoltage lockout function ensures that both driver
outputs are low when the supply voltage is low, and a
Thermal Shutdown function provides the IC with
over-temperature protection.
Order Information
LP1111 □□□
F: Halogen Free & Pb Free
Package Type
SO: SOP8
QV:TDFN8(2x2mm)
Features
All-In-One Synchronous Buck Driver
Bootstrapped High-Side Drive
One PWM Signal Generates Both Drives
Anti-cross Conduction Protection Circuitry
Available in SOP8 & TDFN8 Package
Applications
Multiphase Desktop CPU Supplies
Single-supply Synchronous Buck Converters
Typical Application Circuit
LP1111
VCC
BST
DRVH
SWN
DRVL
PGND
D1
EN
PWM
VIN
VCC
L1
VOUT
EN
PWM
C1
C2
C3
C4
M1
M2
Marking Information
Y:Production year W:Production period X:Production batch