參數(shù)資料
型號(hào)： SP7652EU
英文描述： Evaluation Board Manual
中文描述： 評(píng)估板手冊(cè)
文件頁(yè)數(shù)： 1/13頁(yè)
文件大?。?/td> 133K
代理商： SP7652EU
1
Date: 08/12/04
SP7652 Wide Input Voltage Range 6A, 600kHz, Buck Regulator Copyright 2004 Sipex Corporation
SP7652
FEATURES
■
2.5V to 28V Step Down Achieved Using Dual Input
■
Output Voltage down to 0.8V
■
6A Output Capability (Up to 8A with Air Flow)
■
Built in Low R
DSON
Power FETs (15 m
typ)
■
Highly Integrated Design, Minimal Components
■
600 kHz Fixed Frequency Operation
■
UVLO Detects Both V
CC
and V
IN
■
Over Temperature Protection
■
Short Circuit Protection with Auto-Restart
■
Wide BW Amp Allows Type II or III Compensation
■
Programmable Soft Start
■
Fast Transient Response
■
High Efficiency: Greater than 92% Possible
■
Asynchronous Start-Up into a Pre-Charged Output
■
Small 7mm x 4mm DFN Package
Wide Input Voltage Range 6A, 600kHz, Buck Regulator
The SP7652 is a synchronous step-down switching regulator optimized for high efficiency. The part is designed to be
especially attractive for dual supply, 12V step down with 5V used to power the controller. This lower V
CC
voltage
minimizes power dissipation in the part. The SP7652 is designed to provide a fully integrated buck regulator solution
using a fixed 600kHz frequency, PWM voltage mode architecture. Protection features include UVLO, thermal shutdown
and output short circuit protection. The SP7652 is available in the space saving DFN package
.
Preliminary
TYPICAL APPLICATION CIRCUIT
Ceramic
X5R 6.3V
5V VCC
2. RSET = 54.48 / (Vout - 0.8V) (kOhm)
RSET
(note 2)
1uF
1.5uH, Irate=8A
C1
22uF
CVCC
1uF
U1
SP7652
PGND
1
PGND
2
PGND
3
GND
4
VFB
5
COMP
6
UVIN
7
GND
8
SS
9
VIN
10
VIN
11
VIN
12
VIN
13
LX
14
LX
15
LX
16
NC
17
BST
18
GND
19
GND
20
GND
21
VCC
22
LX
23
LX
24
LX
25
LX
26
CSS
22nF
22pF
3.3V
0-8A
21.5k,1%
GND
47uF
Notes:
1. U1 Bottom-Side Layout should has
three contacts isolated from one
another VIN and SWNODE and GND
2.5V - 20V
VIN
SD101AWS
VOUT
5.1K
100pF
1nF
68.1k,1%
12K
CF1
100pF
5.1
ENABLE
Now Available in Lead Free Packaging
DESCRIPTION
1
2
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8
9
10
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12
13
14
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19
20
21
22
23
24
25
26
TOP VIEW
Heatsink Pad 1
Connect to Lx
Heatsink pad 2
Connect to GND
Heatsink pad 3
Connect to VIN
P
GND
P
GND
GND
V
FB
COMP
UVIN
GND
SS
V
IN
LX
LX
LX
LX
V
CC
GND
GND
GND
BST
NC
LX
LX
LX
DFN PACKAGE
7mm x 4mm
SP7652
P
GND
V
IN
V
IN
V
IN
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