Datasheet > ADP3051ARMZ-REEL7

ADP3051ARMZ-REEL7

更新时间： 2024-11-26 04:04:39

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
16页	505K
描述
500 mA PWM Step-Down DC-DC with Synchronous Rectifier

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500 mA PWM Step-Down DC-DC with

Synchronous Rectifier

ADP3051

GENERAL DESCRIPTION

FEATURES

Current mode control for simple loop compensation

Input voltage range: 2.7 V to 5.5 V

Output voltage range: 0.8 V to 5.5 V

Tri-Mode™ operation for high efficiency

550 kHz PWM operating frequency

High accuracy over line, load, and temperature

Micropower shutdown mode

The ADP3051 is a low noise, current mode, pulse width modu-

lator (PWM) step-down converter capable of supplying over

500 mA to output voltages as low as 0.8 V. This device integrates

a low resistance power switch and synchronous rectifier, provid-

ing excellent efficiency over the entire output voltage range and

eliminating the need for a large and costly external Schottky

rectifier. Its 550 kHz switching frequency permits the use of

small external components.

Space-saving MSOP-8 package

Current mode control and external compensation allow the

regulator to be easily optimized for a wide range of operating

conditions. The ADP3051 operates at a constant 550 kHz

frequency at medium to heavy loads; it smoothly transitions

into Tri-Mode operation to save power at light loads. A pin-

controlled micropower shutdown mode is also included.

APPLICATIONS

Li-ion powered handhelds

MP3 players

PDAs and palmtops

Consumer electronics

The ADP3051’s 2.7 V to 5.5 V input operating range makes it

ideal for both battery-powered applications as well as those with

3.3 V or 5 V supply buses. It is available in a space-saving, 8-lead

MSOP package.

TYPICAL APPLICATION CIRCUIT

ADP3051

1.8V

OUT

10µH

3.3V

12.5kΩ

10kΩ

SHDN

10µF

COMP

10µF

10kΩ

27pF

PGND

GND

270pF

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. 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: 781.326.8703

www.analog.com

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与ADP3051ARMZ-REEL7相关器件

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ADP3089ACP-REEL	ADI	获取价格	IC 2 A SWITCHING REGULATOR, 1250 kHz SWITCHING FREQ-MAX, DSO8, 3 X 3 MM, LEAD FRAME, CSP-8
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