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XRP6658EVB

更新时间： 2024-11-25 12:47:23

品牌	Logo	应用领域
艾科嘉 - EXAR		转换器
页数	文件大小	规格书
11页	541K
描述
1A 1.5MHz PFM/PWM Synchronous Step-Down Converter

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XRP6658EVB 数据手册

XRP6658

1A 1.5MHz PFM/PWM Synchronous Step-Down Converter

September 2011

Rev. 1.5.0

GENERAL DESCRIPTION

APPLICATIONS

The XRP6658 is a synchronous current mode

PWM step down (buck) converter capable of

delivering up to 1 Amp of current and

 Portable Equipments

 Battery Operated Equipments

 Audio-Video Equipments

 Networking & Telecom Equipments

optimized

for

portable

battery-operated

applications.

Based on a current mode 1.5MHz constant

frequency PWM control scheme, the XRP6658

reduces the overall component count and

solution footprint as well as provides a low

output voltage ripple and excellent line and

load regulation. It also implements a PFM

mode to improve light load efficiency as well

as a 100% duty cycle LDO mode. Output

voltage is adjustable to as low as 0.6V with a

better than 3% accuracy while a low quiescent

current supports the most stringent battery

operating conditions.

FEATURES

 Guaranteed 1A Output Current

 Input Voltage: 2.5V to 5.5V

 1.5MHz PWM Current Mode Control

 PFM Mode Operations at Light Load

 100% Duty Cycle LDO Mode Operations

 Achieves 97% Efficiency

 Adjustable Output Voltage Range

 As Low as 0.6V with ±3% Accuracy

Built-in over temperature and under voltage

lock-out protections insure safe operations

under abnormal operating conditions.

 Internal Compensation Network

 15µA Quiescent Current

The XRP6658 is offered in a RoHS compliant,

“green”/halogen free 5-pin SOT23 package.

 Over Temperature & UVLO Protections

 RoHS Compliant “Green”/Halogen Free

5-Pin SOT23 Package

TYPICAL APPLICATION DIAGRAM

Fig. 1: XRP6658 Application Diagram

Exar Corporation

www.exar.com

48720 Kato Road, Fremont CA 94538, USA

Tel. +1 510 668-7000 – Fax. +1 510 668-7001

12 3 4 5 6 7...11

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