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NCP1501/D PDF预览

NCP1501/D

更新时间: 2024-11-07 23:53:23
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NCP1501 Datasheet

NCP1501/D 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  
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
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, 1.35, 1.57, 1.8  
Shutdown Current Consumption of 0.2 m A  
Internal Soft Start  
SHD  
SYN  
1
2
8
7
6
5
CB0  
CB1  
V
O
GND  
3
4
Transistor Count: 3500  
LX  
V
in  
Typical Applications  
Cellular Phones  
PDAs  
Pagers  
Supplies for DSP Cores  
Portable Applications  
(Top View)  
ORDERING INFORMATION  
Device  
Package  
Shipping  
NCP1501DMR2  
Micro8  
4000/Tape & Reel  
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, 2003  
1
Publication Order Number:  
April, 2003 - Rev. 6  
NCP1501/D  

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