參數(shù)資料
型號： SP7653
英文描述： Wide Input Voltage Range, 1.3MHz,Buck Regulator
中文描述： 寬輸入電壓范圍，1.3MHz，降壓穩(wěn)壓器
文件頁數(shù)： 1/12頁
文件大?。?/td> 207K
代理商： SP7653
1
Date: 03/25/05
SP7653 Wide Input Voltage Range, 1.3MHz, Buck Regulator Copyright 2005 Sipex Corporation
SP7653
FEATURES
■
2.5V to 20V Step Down Achieved Using Dual Input
■
Output Voltage down to 0.8V
■
3A Output Capability
■
Built in Low R
DSON
Power Switches (40 m
typical)
■
Highly Integrated Design, Minimal Components
■
1.3MHz 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
95%
Possible
■
Asynchronous Start-Up into a Pre-Charged Output
■
Small 7mm x 4mm DFN Package
Wide Input Voltage Range, 1.3MHz,
Buck Regulator
The SP7653 is a synchronous step-down switching regulator optimized for high efficiency. The part is designed to be
especially attractive for dual supply, 12V to 20V distributed power systems stepped down with 5V used to power the
controller. This lower V
CC
voltage minimizes power dissipation in the part and is used to drive the top switch. The SP7653
is designed to provide a fully integrated buck regulator solution using a fixed 1.3MHz frequency, PWM voltage mode
architecture. Protection features include Under Voltage Lock Out (UVLO), thermal shutdown and output short circuit
protection. The SP7653 is available in the space saving DFN package
.
Preliminary
TYPICAL APPLICATION CIRCUIT
Now Available in Lead Free Packaging
DESCRIPTION
1
2
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5
6
7
8
9
10
11
12
13
14
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16
17
18
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
SP7653
P
GND
V
IN
V
IN
V
IN
Power
Blox
TM
CBST
1uF
R3
200k,1%
L1: IHLP2525CZER2R2M01
2.2uH, Irate=8A
U2
SPX5205
VIN
1
GND
2
EN
3
BYP
4
VOUT
5
C1
22uF
16V
CVCC
2.2uF
U1
SP7653
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
DBST
CSS
22nF
CP1
3.3pF
3.30V
0-3A
16V
R2
21.5k,1%
GND
C3
47uF
6.3V
C3
CERAMIC
X5R
C5
22uF
Notes:
12V
DCR=18mOhm
VIN
SD101AWS
U1 Bottom-Side Layout should have three
Contacts which are isolated from one
another: QT Contact, QB Drain Contact, and
Controller GND Contact.
ALL RESISTORS & CAPACITORS SIZE 0603 UNLESS
OTHERWISE SPECIFIED.
RZ3
158,1%
VOUT
GND2
R4
100k,1%
C2
0.1uF
C1,C5
CERAMIC
X5R
CZ3
820pF
CZ2
1.5nF
R1
68.1k,1%
RZ2
38.3k, 1%
CF1
100pF
fs=1.3MHz
5.11, 1%
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SP7653_06 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Wide Input Voltage Range, 1.3MHz, Buck Regulator
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