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SP6123 PDF预览

SP6123

更新时间: 2024-11-20 22:42:51
品牌 Logo 应用领域
西伯斯 - SIPEX 转换器二极管控制器局域网
页数 文件大小 规格书
18页 154K
描述
Low Voltage, Synchronous Step-Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters

SP6123 数据手册

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®
SP6123/SP6123A  
Low Voltage, Synchronous Step-Down PWM Controller  
Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters  
Optimized for Single Supply, 3V - 5.5V Applications  
1
2
3
4
8
7
6
5
BST  
GH  
GL  
High Efficiency: Greater Than 95% Possible  
SP6123  
VCC  
Accurate Fixed 300kHz (SP6123) or 500kHz  
SWN  
VFB  
GND  
8 Pin NSOIC  
(SP6123A) Frequency Operation  
COMP  
Fast Transient Response  
Internal Soft Start Circuit  
Now Available in Lead Free Packaging  
Accurate 0.8V Reference Allows Low Output  
Voltages  
APPLICATIONS  
Resistor Programmable Output Voltage  
DSP  
Loss-less Current Limit with High Side RDS(ON)  
Microprocessor Core  
I/O & Logic  
Sensing  
Hiccup Mode Current Limit Protection  
Dual N-Channel MOSFET Synchronous Driver  
Quiescent Current: 500µA, 30µA in Shutdown  
8-Pin Surface Mount Package  
Industrial Control  
Distributed Power  
Low Voltage Power  
DESCRIPTION  
The SP6123 is a fixed frequency, voltage mode, synchronous PWM controller designed to  
work from a single 5V or 3.3V input supply, providing excellent AC and DC regulation for high  
efficiency power conversion. Requiring only few external components, the SP6123 pack-  
aged in an 8-pin NSOIC, is especially suited for low voltage applications where cost, small  
size and high efficiency are critical. The operating frequency is internally set to 300kHz  
(SP6123) or 500kHz (SP6123A), allowing small inductor values and minimizing PC board  
space. TheSP6123drivesanallN-channelsynchronouspowerMOSFETstageforimproved  
efficiency and includes an accurate 0.8V reference for low output voltage applications.  
TYPICAL APPLICATION CIRCUIT  
3V to 5.5V  
IN  
MBR0530  
C
IN  
680µF  
V
CBST  
1µF  
IN  
BST  
GH  
GL  
0.8V to 5.0V  
2A to 10A  
CB  
2.2µF  
V
FDS6890A  
L1  
CC  
(1.6V, 4A shown)  
SP6123A  
SWN  
GND  
V
OUT  
1.5µH  
V
COMP  
FB  
R1  
10k  
RZ  
15k  
C
C
C
OUT3  
1µF  
OUT1  
470µF  
OUT2  
470µF  
CP  
56pF  
CC  
4.7nF  
R2  
10k  
FDS6890A  
STPS2L25U  
Date: 5/25/04  
SP6123 Low Voltage, Synchronous Step Down PWM Controller  
© Copyright 2004 Sipex Corporation  
1

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