ADP3419 Analog Devices, ADP3419 Datasheet
ADP3419
Manufacturer Part Number
ADP3419
Description
High Voltage MOSFET Driver
Manufacturer
Analog Devices
Datasheet
1.ADP3419.pdf
(16 pages)
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www.datasheet4u.com
FEATURES
All-in-one synchronous buck driver
One PWM signal generates both drives
Anticross-conduction protection circuitry
Output disable function
Crowbar control
Synchronous override control
Undervoltage lockout
APPLICATIONS
Mobile computing CPU core power converters
Multiphase desk-note CPU supplies
Single-supply synchronous buck converters
Nonsynchronous-to-synchronous drive conversion
GENERAL DESCRIPTION
The ADP3419 is a dual MOSFET driver optimized for driving
two N-channel switching MOSFETs in nonisolated synchro-
nous buck power converters used to power CPUs in portable
computers. The driver impedances have been chosen to provide
optimum performance in multiphase regulators at up to 25 A
per phase. The high-side driver can be bootstrapped relative to
the switch node of the buck converter and is designed to
accommodate the high voltage slew rate associated with floating
high-side gate drivers.
The ADP3419 includes an anticross-conduction protection
circuit, undervoltage lockout to hold the switches off until the
driver has sufficient voltage for proper operation, a crowbar
input that turns on the low-side MOSFET independently of the
input signal state, and a low-side MOSFET disable pin to
provide higher efficiency at light loads. The SD pin shuts off
both the high-side and the low-side MOSFETs to prevent rapid
output capacitor discharge during system shutdown.
The ADP3419 is specified over the extended commercial
temperature range of 0°C to 100°C and is available in a 10-lead
MSOP package.
Rev. A
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. Trademarks and
registered trademarks are the property of their respective owners.
Dual Bootstrapped, High Voltage MOSFET
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
FROM CONTROLLER
FROM CONTROLLER
ENABLE CONTROL
SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM
CLAMP OUTPUT
CROWBAR
FROM SYSTEM
CONTROLLER
PWM OUTPUT
DRVLSD
Driver with Output Disable
SD
GENERAL APPLICATION CIRCUIT
IN
FROM
1
2
3
4
ADP3419
PROTECTION,
SHUTDOWN
CROWBAR
© 2005 Analog Devices, Inc. All rights reserved.
OVERLAP
4
CIRCUITS
1
2
3
UVLO,
AND
IN
SD
DRVLSD
CROWBAR
VCC
5
ADP3419
Figure 1.
Figure 2.
VCC
GND
5V
5
7
DRVH
DRVL
BST
SW
GND
10
BST
9
8
6
10
7
ADP3419
VDC
www.analog.com
9
8
6
DRVH
SW
DRVL
V
OUT
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