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NCP1501

更新时间： 2024-09-19 21:54:31
品牌 Logo 应用领域
安森美 - ONSEMI 转换器
页数 文件大小 规格书
14页 164K
描述
Dual Mode PWM/Linear Buck Converter

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NCP1501 数据手册

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NCP1501  
Dual Mode PWM/Linear  
Buck Converter  
The NCP1501 is a dual mode regulator that operates either as a  
PWM Buck Converter or as a Low Drop Out Linear Regulator. If a  
synchronization signal is present, the NCP1501 operates as a current  
mode PWM converter with synchronous rectification. The  
synchronization signal allows the user to control the location of the  
spurious frequency noise generated by a PWM converter. Linear mode  
is active when a synchronization signal is not present. The NCP1501  
configuration allows an efficient high power operation and low noise  
during system sleep modes.  
http://onsemi.com  
MARKING  
DIAGRAM  
8
Micro8E  
(MSOP−8)  
DM SUFFIX  
CASE 846A  
8
1501  
AYW  
Features  
1
• Synchronous Rectification for Higher Efficiency in PWM Mode  
• Linear Mode Operation for Low Noise Output at Low Loads  
• Integrated MOSFETs and Feedback Circuits  
• Cycle−by−Cycle Peak Current Limit of 800 mA (typ)  
• Automatic Switching Between PWM and Linear Mode  
• Operating Frequency Range of 500 to 1000 kHz  
• Optimized for Ceramic Capacitors and Low Profile Inductors  
• Thermal Limit Protection  
1
1501= Device Code  
A
Y
W
= Assembly Location  
= Year  
= Work Week  
PIN CONNECTIONS  
• Built−in Slope Compensation for Current Mode PWM Converter  
• Fixed Output Voltages of 1.05 V, 1.35 V, 1.57 V, 1.8 V  
• Shutdown Current Consumption of 0.2 m A  
• Internal Soft Start  
• Transistor Count: 3500  
• Pb−Free Package is Available  
SHD  
SYN  
1
2
8
7
6
5
CB0  
CB1  
V
O
GND  
3
4
LX  
V
in  
(Top View)  
Typical Applications  
• Cellular Phones  
• PDAs  
• Pagers  
• Supplies for DSP Cores  
• Portable Applications  
ORDERING INFORMATION  
†
Device  
Package  
Shipping  
NCP1501DMR2  
Micro8  
4000/Tape & Reel  
4000/Tape & Reel  
NCP1501DMR2G  
Micro8  
(Pb−Free)  
†For information on tape and reel specifications,  
including part orientation and tape sizes, please  
refer to our Tape and Reel Packaging Specifications  
Brochure, BRD8011/D.  
CB0  
CB1  
GND  
SHD  
SYN  
1
2
8
7
6
5
V
O
3
4
V
out  
LX  
V
in  
V
bat  
L
10 m H  
NCP1501  
C
C
IN  
OUT  
10  
m
10  
m
Figure 1. Typical Applications Circuit  
Semiconductor Components Industries, LLC, 2004  
1
Publication Order Number:  
March, 2004 − Rev. 7  
NCP1501/D  
1234567...14

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