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参数资料
型号： SP7653EB
厂商： Exar Corporation
文件页数： 1/15页
文件大小： 0K
描述： EVAL BOARD FOR SP7653
标准包装： 1
系列： *
Power Blox
WideInputVoltageRange,
1.3MHz, Buck Regulator
SP7653
TM
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
DFN PACKAGE
7mm x 4mm
P LX
GND 1 26 LX
P GND
BOTTOM VIEW
LX 25
P GND 2
25 LX
Heatsink to Lx 1
Connect Pad
P GND
P GND 3
24 LX
LX 23 4 GND
V CC
V FB 5
GND
GND 20 7
GND 19 8
GND
BST SS 18
NC 17 10 V IN
V IN 10
17 NC
11 V IN
LX V 16
16 LX
IN 11
Connect to VIN
LX V 15
15 LX
IN 12
LX V 14
14 LX
IN 13
FEATURES
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■
■
■
■
■
■
■
■
■
■
■
■
■
■
■
SP7653
DFN PACKAGE
7mm x 4mm
26 1 P GND
BOTTOM VIEW
2
Heatsink Pad 1
LX 24 3
Connect to Lx
GND 4 23 LX
22 5 V FB
2 2 V CC
21 6 COMP
COMP 6 Heatsink Pad 2 21 GND
Connect to pad2
Heatsink GND 7 UV IN
UVIN Connect to GND 20 GND
8 GND
19 GND
9 SS
9 18 BST
Heatsink Pad 3
Connect to V IN
Heatsink pad 3
12 V IN
13 V IN
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
CERAMIC
CF1
100pF
CZ2 RZ2
1.5nF 38.3k , 1%
CP1
3.3pF
CSS
22nF
1
2
3
4
5
6
7
8
9
10
11
PGND
PGND
PGND
GND
VFB
COMP
UVIN
GND
SS
VIN
VIN
U1
SP7653
LX
LX
LX
LX
VCC
GND
GND
GND
BST
NC
LX
26
25
24
23
22
21
20
19
18
17
16
L1 IHLP2525CZER2R2M01
2.2uH, Irate=8A
DCR=18m
C3: X5R C3
47uF
6.3V
CVCC
2.2uF
GND2
RBST
5.11 ,
DBST
1%
RZ3
158 ,1%
CZ3
820pF
VOUT
3.30V
0-3A
R1
68.1k ,1%
R2
21.5k ,1%
VIN
12
13
VIN
VIN
LX
LX
15
14
CBST
1uF
SD101AWS
12V
C1,C5:
CERAMIC
X5R
GND
C1
22uF
16V
C5
22uF
16V
R3
200k ,1%
R4
100k ,1%
C2
0.1uF
F s=1.3MHz
1
2
3
U2
SPX5205
VIN VOUT
GND
EN BYP
5
4
Notes:
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.
2/17/06
Date:   /20/06
Wide Input Input     Range,Range,      BuckBuck
SP7653 SP7653 Wide Voltage Voltage  .3MHz, 1.3MHz, Regulator
  1
? Copyright 2006 Sipex Corporation
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