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SP7653ERL/TR Datasheet

  • SP7653ERL/TR

  • Wide Input Voltage Range, 1.3MHz, Buck Regulator

  • 15頁(yè)

  • SIPEX

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Wide Input Voltage Range,
1.3MHz, Buck Regulator
FEATURES
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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
U.S. Patent #6,922,041
SP7653
Power
Blox
SP7653
SP7653
BOTTOM VIEW
BOTTOM VIEW
Heatsink Pad 1
Heatsink
to Lx
1
Connect
Pad
Connect to Lx
1 P
GND
26 LX
2 P
GND
25 LX
3 P
GND
24 LX
4 GND
23 LX
5 V
FB
2 2 V
CC
6 COMP
21 GND
7 UV
IN
20 GND
8 GND
19 GND
9 SS
18 BST
10 V
IN
17 NC
11 V
IN
16 LX
12 V
IN
15 LX
13 V
IN
14 LX
TM
DFN PACKAGE
DFN PACKAGE
7mm x 4mm
7mm x 4mm
LX 26
P
GND
1
LX 25
P
GND
2
LX 24
P
GND
3
LX 23
GND 4
V
CC
2 2
V
FB
5
GND 21
COMP 6
GND 20
UVIN 7
GND 19
GND 8
BST 18
SS 9
NC 17
V
IN
10
LX 16
V
IN
11
LX 15
V
IN
12
LX 14
V
IN
13
Heatsink Pad 2
Heatsink
GND
Connect to
pad 2
Connect to GND
Heatsink Pad 3
Connect to V
IN
Heatsink pad 3
Connect to VIN
Now Available in Lead Free Packaging
DESCRIPTION
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
.
TYPICAL APPLICATION CIRCUIT
2.2uH, Irate=8A
DCR=18m
C3: X5R
CERAMIC
C3
47uF
6.3V
U1
SP7653
1
PGND
PGND
PGND
GND
VFB
COMP
UVIN
GND
SS
VIN
VIN
VIN
VIN
LX
LX
LX
LX
VCC
GND
GND
GND
BST
NC
LX
LX
LX
26
25
24
23
22
21
20
19
18
17
16
15
14
2
3
4
5
6
7
8
9
L1 IHLP2525CZER2R2M01
CZ2
1.5nF
RZ2
38.3k , 1%
CP1
RZ3
158 ,1%
CZ3
820pF
VOUT
3.30V
0-3A
R1
68.1k ,1%
3.3pF
CF1
100pF
CSS
22nF
CVCC
2.2uF
GND2
R2
21.5k ,1%
DBST
SD101AWS
10
11
12
RBST
5.11 ,
1%
CBST
1uF
VIN
12V
C1,C5:
CERAMIC
X5R
C1
22uF
16V
C5
22uF
16V
13
R3
200k ,1%
Fs=1.3MHz
1
2
3
U2
SPX5205
VIN
GND
EN
BYP
4
VOUT
5
Notes:
GND
R4
C2
100k ,1% 0.1uF
U1 Bottom-Side Layout should have
three Contacts which are
isolated from one another: QT-
Drain Contact, QB-Drain Contact and
Controller-GND Contact.
ALL RESISTORS & CAPACITORS ARE SIZE
0603 UNLESS OTHERWISE SPECIFIED.
Date:
/20/06
2/17/06
SP7653 Wide Input Voltage Range, 1.3MHz, Buck Regulator
SP7653 Wide Input Voltage Range, .3MHz, Buck Regulator
漏 Copyright 2006 Sipex Corporation

1

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