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SP7655ER-L/TR Datasheet

  • SP7655ER-L/TR

  • Wide Input Voltage Range 8A, 300kHz, Buck Regulator

  • 12頁

  • SIPEX

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廬
Advanced
SP7655
Wide Input Voltage Range 8A, 300kHz, Buck Regulator
FEATURES
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2.5V to 28V Step Down Achieved Using Dual Input
Output Voltage down to 0.8V
8A Output Capability
Built in Low R
DSON
Power Switches (15 m鈩?typ)
Highly Integrated Design, Minimal Components
300 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
95%
Possible
Asynchronous Start-Up into a Pre-Charged Output
Small 7mm x 4mm DFN Package
P
GND
1
P
GND
2
P
GND
3
GND 4
V
FB
5
COMP 6
UVIN 7
GND 8
SS 9
V
IN
10
V
IN
11
V
IN
12
V
IN
13
Heatsink pad 3
Connect to VIN
Heatsink pad 2
Connect to GND
TOP VIEW
Heatsink Pad 1
Connect to Lx
SP7655
DFN PACKAGE
7mm x 4mm
26 LX
25 LX
24 LX
23 LX
2 2 V
CC
21 GND
20 GND
19 GND
18 BST
17 NC
16 LX
15 LX
14 LX
Now Available in Lead Free Packaging
DESCRIPTION
The SP7655 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. This lower V
CC
voltage minimizes power dissipation in the part and is used to drive the top switch. The SP7655
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 SP7655 is
available in the space saving DFN package
.
TYPICAL APPLICATION CIRCUIT
U1
SP7655
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
L1
2.2uH, Irate=8A
CZ2
1,000pF
RZ2
15k,1%
2
3
4
5
6
RZ3
C3
47uF
6.3V
7.15k,1%
VOUT
3.30V
0-6A
R1
68.1k,1%
CP1
22pF
CZ3
150pF
CVCC
2.2uF
CF1
100pF
ENABLE
7
8
9
DBST
SD101AWS
RSET
21.5k,1%
(note 2)
CSS
47nF
10
11
12
CBST
68,00pF
VIN
12V
C1
22uF
16V
13
+5V VCC
fs=300Khz
C4
22uF
16V
Notes:
1. U1 Bottom-Side Layout should
has three contacts isolated from
one another Vin SWNODE and GND
2. RSET=54.48/(Vout-0.8V)
(KOhm)
GND
Date: 08/17/04
SP7655 Wide Input Voltage Range 8A, 300kHz, Buck Regulator
漏 Copyright 2004 Sipex Corporation
1

SP7655ER-L/TR 產(chǎn)品屬性

  • Exar

  • 開關(guān)變換器、穩(wěn)壓器與控制器

  • SMD/SMT

  • DFN

  • Reel

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