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NCP6361BFCCT1G

更新时间： 2024-09-16 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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NCP6361BFCCT1G 数据手册

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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,…)  
powered by single−cell Lithium−Ion batteries. The device is able to  
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  
G
WLCSP9  
CASE 567GM  
6361x = Specific Device Code  
x = A or B  
A
L
Y
= Assembly Location  
= Wafer Lot  
= Year  
WW = Work Week  
G
= 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  
FB  
BPEN  
Bypass Control  
Vout Control  
Bypass  
VCON  
AGND  
PVIN  
SW  
10uF  
DCDC  
V
OUT  
Thermal  
Protection  
1.0A  
3.43/6.00 MHz  
0.47uH  
FSEL  
EN  
4.7uF  
PGND  
Enabling  
Figure 1. NCP6361 Block Diagram  
© Semiconductor Components Industries, LLC, 2014  
1
Publication Order Number:  
April, 2014 − Rev. 5  
NCP6361/D  
1234567...20

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