Datasheet > NCP6361

NCP6361

更新时间： 2024-11-24 01:14:43

品牌	Logo	应用领域
安森美 - ONSEMI		/
页数	文件大小	规格书
20页	1261K
描述
Buck Converter with Bypass Mode for RF Power Amplifiers

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中文翻译

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NCP6361 数据手册

NCP6361

Buck Converter with

Bypass Mode for RF Power

Amplifiers

The NCP6361, a PWM synchronous step−down DC−to−DC

converter, is optimized for supplying RF Power Amplifiers (PAs) used

in 3G/4G wireless systems (Mobile / Smart Phones, Tablets,…)

deliver up to 2 A current in bypass mode and 800 mA in buck mode.

The output voltage is monitorable from 0.4 V to 3.5 V by an analog

control pin VCON. The analog control allows dynamically optimizing

the RF Power Amplifier’s efficiency through the monitoring of the PA

output power. With an improved overall system efficiency the

communication time and phone autonomy can be consequently

increased. At light load for optimizing the DC−to−DC converter

efficiency, the NCP6361 enters automatically in PFM mode and

operates in a slower switching frequency. The NCP6361 enters in

bypass mode when the desired output voltage becomes close to the

input voltage (e.g.: low battery conditions). The device operates at

3.429 MHz or 6 MHz switching frequency. This way the system

tuning can focus respectively either on a better efficiency (3.249 MHz)

or on employing smaller value inductor and capacitors (6 MHz).

Synchronous rectification and automatic PFM / PWM / By−Pass

operating mode transitions improve overall solution efficiency. The

NCP6361 has two versions: NCP6361A and NCP6361B. Version B

has a spread spectrum function for low EMI operation. The NCP6361

is available in a space saving, low profile 1.36 x 1.22 mm CSP−9

package.

http://onsemi.com

MARKING

DIAGRAM

6361x

ALYWW

WLCSP9

CASE 567GM

6361x = Specific Device Code

x = A or B

= Assembly Location

= Wafer Lot

= Year

WW = Work Week

= Pb−Free Package

ORDERING INFORMATION

See detailed ordering, marking and shipping information on

page 19 of this data sheet.

Features

• Input Voltage from 2.5 V to 5.5 V for Battery Powered

Applications

• Low 45 mA Quiescent Current

• Thermal Protections to Avoid Damage of the IC

• Small 1.36 x 1.22 mm / 0.4 mm Pitch CSP Package

• This is a Pb−Free Device

• Adjustable Output Voltage (0.4 V to 3.50 V)

• 3.429 / 6 MHz Selectable Switching Frequency

• Uses 470 nH Inductor and 4.7 mF Capacitor for

Optimized Footprint and Solution Thickness

• PFM /PWM/Bypass Automatic Mode Change for High

Efficiency

Typical Applications

• 3G / 4G Wireless Systems, Smart−Phones and Webtablets

VBATT

Battery or

System

Supply

NCP6361

Bypass

Enable

BPEN

Bypass Control

Vout Control

Bypass

VCON

AGND

PVIN

10uF

DCDC

OUT

Thermal

Protection

1.0A

3.43/6.00 MHz

0.47uH

FSEL

4.7uF

PGND

Enabling

Figure 1. NCP6361 Block Diagram

Publication Order Number:

April, 2014 − Rev. 5

NCP6361/D

12 3 4 5 6 7...20

中文翻译

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