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SP7650ER/TR

更新时间: 2024-11-22 22:07:19
品牌 Logo 应用领域
西伯斯 - SIPEX 稳压器
页数 文件大小 规格书
12页 121K
描述
Wide Input Voltage Range 3A, 300kHz, Buck Regulator

SP7650ER/TR 数据手册

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®
Advanced  
SP7650  
Wide Input Voltage Range 3A, 300kHz, Buck Regulator  
SP7650  
FEATURES  
2.5V to 28V Step Down Achieved Using Dual Input  
DFN PACKAGE  
7mm x 4mm  
Output Voltage down to 0.8V  
3A Output Capability  
Built in Low RDSON Power Switches (40 mtyp)  
Highly Integrated Design, Minimal Components  
300 kHz Fixed Frequency Operation  
UVLO Detects Both VCC and VIN  
P
P
GND  
GND  
GND  
1
2
3
26  
25  
24  
23  
LX  
LX  
LX  
TOP VIEW  
Heatsink Pad 1  
Connect to Lx  
P
GND  
4
5
LX  
V
FB  
22 V  
CC  
COMP  
UVIN  
GND  
SS  
21 GND  
20 GND  
6
7
Heatsink pad 2  
Connect to GND  
Over Temperature Protection  
Short Circuit Protection with Auto-Restart  
Wide BW Amp Allows Type II or III Compensation  
Programmable Soft Start  
8
9
19  
18  
GND  
BST  
V
IN 10  
17  
16  
NC  
LX  
Heatsink pad 3  
Fast Transient Response  
V
V
V
IN 11  
IN 12  
Connect to V  
IN  
High Efficiency: Greater than 95% Possible  
Asynchronous Start-Up into a Pre-Charged Output  
Small 7mm x 4mm DFN Package  
15 LX  
14  
LX  
IN 13  
Now Available in Lead Free Packaging  
DESCRIPTION  
The SP7650 is a synchronous step-down switching regulator optimized for high efficiency. The part is designed to be  
especially attractive for dual supply, 12V or 24V distributed power systems step down with 5V used to power the  
controller.ThislowerVCC voltageminimizespowerdissipationinthepartandisusedtodrivethetopswitch.TheSP7650  
is designed to provide a fully integrated buck regulator solution using a fixed 300kHz frequency, PWM voltage mode  
architecture. Protection features include UVLO, thermal shutdown and output short circuit protection. The SP7650 is  
available in the space saving DFN package.  
TYPICAL APPLICATION CIRCUIT  
U1  
SP7650  
L1  
1
26  
PGND  
PGND  
LX  
LX  
VOUT  
3.3V  
0-3A  
2.2uH, Irate=4.78A  
2
3
25  
24  
RZ2  
CZ2  
RZ3  
PGND  
GND  
LX  
LX  
15k,1%  
7.15k,1%  
1,000pF  
C3  
4
5
23  
22  
R1  
47uF  
6.3V  
CP1  
68.1k,1%  
VFB  
VCC  
CZ3  
22pF  
150pF  
6
7
21  
20  
COMP  
UVIN  
GND  
GND  
CVCC  
2.2uF  
CF1  
100pF  
ENABLE  
8
9
19  
18  
GND  
SS  
GND  
BST  
DBST  
RSET  
21.5k,1%  
(note 2)  
10  
17  
16  
SD101AWS  
CSS  
VIN  
VIN  
NC  
LX  
47nF  
11  
CBST  
6800pF  
12  
13  
15  
14  
VIN  
VIN  
LX  
LX  
VIN  
12V  
+5V VCC  
fs=300Khz  
C1  
Notes:  
22uF  
1. U1 Bottom-Side Layout should  
16V  
has three contacts isolated from  
one another Vin SWNODE and GND  
GND  
2. RSET=54.48/(Vout-0.8V)  
(KOhm)  
Date: 08/24/04  
SP7650 Wide Input Voltage Range 3A, 300kHz, Buck Regulator  
© Copyright 2004 Sipex Corporation  
1

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