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ADP3110
Dual Bootstrapped, 12 V MOSFET Driver
Dual Bootstrapped, 12 V MOSFET
Driver with Output Disable ADP3110
FEATURES
All-in-one synchronous buck driver
Bootstrapped high-side drive
One PWM signal generates both drives
Anticross-conduction protection circuitry
Output disable control turns off both MOSFETs to float
output per Intel® VRM 10 specification
APPLICATIONS
Multiphase desktop CPU supplies
Single-supply synchronous buck converters
GENERAL DESCRIPTION The ADP3110 is a dual, high voltage MOSFET driver optimized
for driving two N-channel MOSFETs, which are the two
switches in a nonisolated synchronous buck power converter.
Each of the drivers is capable of driving a 3000 pF load with a
25 ns propagation delay and a 30 ns transition time. One of the
drivers can be bootstrapped and is designed to handle the high
voltage slew rate associated with floating high-side gate drivers.
The ADP3110 includes overlapping drive protection to prevent
shoot-through current in the external MOSFETs.
The OD pin shuts off both the high-side and the low-side
MOSFETs to prevent rapid output capacitor discharge during
system shutdown.
The ADP3110 is specified over the commercial temperature
range of 0°C to 85°C and is available in an 8-lead SOIC_N
package.
SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM OD
ADP3110
VCC
BST
DRVH
DRVL
PGND
DELAY
VCC
DELAY
CMP
CMP
CONTROL
LOGIC
RBST
CBST1
CBST2
12V
INDUCTORFigure 1.
