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AO4884L

更新时间： 2024-11-20 07:18:43

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
28页	827K
描述
20 V, 6 A Synchronous Step-Down

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AO4884L 数据手册

20 V, 6 A Synchronous Step-Down

Regulator with Low-Side Driver

Data Sheet

ADP2381

FEATURES

TYPICAL APPLICATIONS CIRCUIT

Input voltage: 4.5 V to 20 V

PVIN

BST

Integrated 44 mΩ high-side MOSFET

0.6 V 1% reference voltage over temperature

Continuous output current: 6 A

Programmable switching frequency: 250 kHz to 1.4 MHz

Synchronizes to external clock: 250 kHz to 1.4 MHz

180° out-of-phase synchronization

Programmable UVLO

BST

OUT

^UVLOADP2381

PGOOD

FET

VREG

PGND

GND

VREG

OSC

SYNC

EN/SS

COMP

TOP

Power-good output

BOT

External compensation

C_EA

Internal soft start with external adjustable option

Startup into a precharged output

Supported by ADIsimPower design tool

CP_EA

Figure 1.

APPLICATIONS

100

Communication infrastructure

Networking and servers

Industrial and instrumentation

Healthcare and medical

Intermediate power rail conversion

DC-to-dc point of load application

= 3.3V

= 5V

= 1.2V

OUT

OUTPUT CURRENT (A)

Figure 2. ADP2381 Efficiency vs. Output Current, V_IN= 12 V, f_SW= 250 kHz

GENERAL DESCRIPTION

The ADP2381 is a current mode control, synchronous, step-

down, dc-to-dc regulator. It integrates a 44 mΩ power MOSFET

and a low-side driver to provide a high efficiency solution. The

ADP2381 runs from an input voltage of 4.5 V to 20 V and can

deliver 6 A of output current. The output voltage can be

adjusted to 0.6 V to 90% of the input voltage. The switching

frequency of the ADP2381 can be programmed from

250 kHz to 1.4 MHz or fixed at 290 kHz or 550 kHz. The

synchronization function allows the switching frequency to be

synchronized to an external clock to minimize system noise.

External compensation and an adjustable soft start provide

design flexibility. The power-good output provides simple and

reliable power sequencing. Additional features include

programmable undervoltage lockout (UVLO), overvoltage

protection (OVP), overcurrent protection (OCP), and thermal

shutdown (TSD).

The ADP2381 operates over the −40°C to +125°C junction

temperature range and is available in a 16-lead TSSOP_EP

package.

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

rightsof third parties that may result fromits 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 andregisteredtrademarks 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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