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NCP3123 PDF预览

NCP3123

更新时间: 2024-09-16 12:19:55
品牌 Logo 应用领域
安森美 - ONSEMI 稳压器开关
页数 文件大小 规格书
41页 2417K
描述
Dual 3.0 A, Step-Down DC/DC Switching Regulator

NCP3123 数据手册

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NCP3123  
Dual 3.0 A, Step-Down  
DC/DC Switching Regulator  
The NCP3123 is a dual buck converter designed for low voltage  
applications requiring high efficiency. This device is capable of  
producing an output voltage as low as 0.8 V. The NCP3123 provides  
dual 3.0 A switching regulators with an adjustable 200 kHz  
2200 kHz switching frequency. The switching frequency is set by an  
external resistor. The NCP3123 also incorporates an autotracking  
and sequencing feature. Protection features include cyclebycycle  
current limit and undervoltage lockout (UVLO). The NCP3123 comes  
in a 32pin QFN package.  
http://onsemi.com  
MARKING DIAGRAM  
1
NCP3123  
AWLYYWWG  
G
1
32  
QFN32  
CASE 488AM  
Features  
Input Voltage Range from 4.5 V to 13.2 V  
12 V to 5.0 V = 85% Efficiency Min @ 3.0 A  
in  
out  
NCP3123= Specific Device Code  
A
= Assembly Location  
= Wafer Lot  
= Year  
= Work Week  
= PbFree Package  
2002200 kHz Operation  
WL  
YY  
WW  
G
Stable with Low ESR Ceramic Output Capacitor  
0.8 1.5% FB Reference Voltage  
External SoftStart  
(Note: Microdot may be in either location)  
Out of Phase Operation of OUT1 & OUT2  
AutoTracking and Sequencing  
Enable/Disable Capability  
ORDERING INFORMATION  
See detailed ordering and shipping information in the package  
dimensions section on page 40 of this data sheet.  
Hiccup Overload Protection  
Low Shutdown Power (I < 100 mA)  
q
Typical Applications  
SetTop Boxes, Portable Applications, Networking and  
Telecommunications  
DSP/mP/FPGA Core  
VIN  
RVIN  
C3  
R14  
R24  
R_TRACK  
OUT1  
GND  
SW1  
VIN  
PG1  
PG2  
PG1  
PG2  
L11  
D11  
Enable  
Enable  
R11  
C11  
EN1  
EN1  
Disable  
Disable  
GND  
NCP3123  
SEQ1  
GND  
R12  
EN2  
EN2  
C1  
C2  
GND  
SEQ2  
GND  
GND  
OUT2  
TRACK1,2  
SW2  
L21  
D21  
R21  
R22  
C21  
GND  
C12  
RT  
GND  
C22  
R23  
GND  
R13  
C13  
GND  
C23  
GND  
GND  
GND  
Figure 1. Typical Application Circuit  
© Semiconductor Components Industries, LLC, 2008  
1
Publication Order Number:  
October, 2008 Rev. 1  
NCP3123/D  

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