Datasheet > ADP3419JRMZ-REEL1

ADP3419JRMZ-REEL1

更新时间： 2022-11-24 21:46:30

品牌	Logo	应用领域
亚德诺 - ADI		驱动器
页数	文件大小	规格书
16页	393K
描述
Dual Bootstrapped, High Voltage MOSFET Driver with Output Disable

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Dual Bootstrapped, High Voltage MOSFET

Driver with Output Disable

ADP3419

FEATURES

SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM

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

VCC

BST

DRVH

UVLO,

OVERLAP

PROTECTION,

SHUTDOWN

AND

DRVLSD

CROWBAR

CIRCUITS

APPLICATIONS

DRVL

CROWBAR

Mobile computing CPU core power converters

Multiphase desk-note CPU supplies

ADP3419

Single-supply synchronous buck converters

Nonsynchronous-to-synchronous drive conversion

GND

Figure 1.

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.

GENERAL APPLICATION CIRCUIT

VDC

VCC

FROM CONTROLLER

BST

PWM OUTPUT

ADP3419

FROM SYSTEM

ENABLE CONTROL

DRVH

OUT

FROM

CONTROLLER

DRVLSD

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

FROM CONTROLLER

CLAMP OUTPUT

CROWBAR DRVL

GND

Figure 2.

provide higher efficiency at light loads. The

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.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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