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ADP3120A

Analog Devices
Part Number ADP3120A
Manufacturer Analog Devices
Description MOSFET Driver
Published Jan 14, 2007
Detailed Description www.DataSheet4U.com Dual Bootstrapped, 12 V MOSFET Driver with Output Disable ADP3120A FEATURES All-in-one synchronous ...
Datasheet PDF File ADP3120A PDF File

ADP3120A
ADP3120A

Overview
www.
DataSheet4U.
com Dual Bootstrapped, 12 V MOSFET Driver with Output Disable ADP3120A FEATURES All-in-one synchronous buck driver Bootstrapped high-side drive One PWM signal generates both drives Anticross conduction protection circuitry OD for disabling the driver outputs Meets CPU VR requirement when used with Analog Devices Flex -Mode™ 1 controller GENERAL DESCRIPTION The ADP3120A is a dual, high voltage MOSFET driver optimized for driving two N-channel MOSFETs, the two switches in a nonisolated synchronous buck power converter.
Each driver is capable of driving a 3000 pF load with a 45 ns propagation delay and a 25 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 ADP3120A 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 ADP3120A is specified over the commercial temperature range of 0°C to 85°C and is available in 8-lead SOIC_N and 8-lead LFCSP_VD packages.
1 APPLICATIONS Multiphase desktop CPU supplies Single-supply synchronous buck converters Flex-Mode is protected by U.
S.
Patent 6683441; other patents pending.
FUNCTIONAL BLOCK DIAGRAM 12V VCC 4 D1 ADP3120A LATCH R1 R2 Q S DELAY BST 1 CBST2 CBST1 DRVH RG Q1 RBST SW IN 2 8 TO INDUCTOR 7 CMP VCC 6 CMP 1V CONTROL LOGIC DRVL 5 Q2 DELAY OD 3 PGND 05812-001 6 Figure 1.
Rev.
0 Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice.
No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
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