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SP7652ER/TR Datasheet

  • SP7652ER/TR

  • Wide Input Voltage Range 6A, 600kHz, Buck Regulator

  • 13頁(yè)

  • SIPEX

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Preliminary
SP7652
Wide Input Voltage Range 6A, 600kHz, Buck Regulator
FEATURES
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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鈩?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
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
SP7652
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 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
.
TYPICAL APPLICATION CIRCUIT
100pF
5.1K
21.5k,1%
U1
1nF
12K
1
2
3
PGND
PGND
PGND
GND
VFB
COMP
UVIN
GND
SS
VIN
VIN
VIN
VIN
RSET
(note 2)
68.1k,1%
26
25
24
23
22
21
20
19
18
17
16
15
14
SP7652
LX
LX
LX
LX
VCC
GND
GND
GND
BST
NC
LX
LX
LX
VOUT
3.3V
0-8A
47uF
Ceramic
X5R 6.3V
1.5uH, Irate=8A
22pF
4
5
6
7
5V VCC
CVCC
1uF
CF1
100pF
8
9
ENABLE
VIN
10
CSS
22nF
5.1
SD101AWS
11
12
13
1uF
2.5V - 20V
Notes:
C1
22uF
1. U1 Bottom-Side Layout should has
three contacts isolated from one
another VIN and SWNODE and GND
2. RSET = 54.48 / (Vout - 0.8V)
(kOhm)
GND
Date: 08/12/04
SP7652 Wide Input Voltage Range 6A, 600kHz, Buck Regulator
漏 Copyright 2004 Sipex Corporation
1

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