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SP6137HEU/TR Datasheet

  • SP6137HEU/TR

  • Dual Supply Synchronous Buck Controller

  • 13頁(yè)

  • SIPEX

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廬
Preliminary
SP6137HV
Dual Supply Synchronous Buck Controller
FEATURES
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
3V to 28V Step Down Achieved Using Dual Input
Small 10-Pin MSOP Package
2A to 15A Ouput Capability
Highly Integrated Design, Minimal Components
UVLO Detects Both V
CC
and V
IN
Short Circuit Protection with Auto-Restart
On-Board 1.5鈩?sink (2鈩?source) NFET Drivers
Programmable Soft Start
Fast Transient Response
High Efficiency: Greater than 94% Possible
A Synchronous Start-Up into a Pre-Charged Output
V
CC
1
GL
2
GND
3
V
FB
4
COMP
5
10
BST
SP6137H
10 Pin MSOP
9
GH
8
SWN
7
SS
6
UVIN
Now Available in Lead Free Packaging
APPLICATIONS
鈻?/div>
12V DPA
鈻?/div>
Communications Systems
鈻?/div>
Graphics Cards
DESCRIPTION
The SP6137HV is a synchronous step-down switching regulator controller 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 SP6137HV is designed to drive a pair of external NFETs using a
fixed
900kHz
frequency, PWM voltage mode architecture. Protection features include UVLO, thermal shutdown and
output short circuit protection. The SP6137HV is available in the cost and space saving 10-pin MSOP
.
TYPICAL APPLICATION CIRCUIT
VIN
3.5V - 28V
C1
22碌F
16V
FDS6676S
14.5A, 6m鈩?/div>
1 2 3
8 7 6 5
C2
22碌F
16V
GND
V
CC
= 5V @ 30mA
QT
4
RLF
3.0,5%
CBST
1碌F
DBST
MBR0530
1
C1, C2
Ceramic
1210
X5R
U1
SP6137H
VCC
GL
GND
VFB
COMP
BST 10
GH 9
SWN 8
SS 7
UVIN 6
2
3
4
0.8V
5
R5
Bead
8 7 6 5
R3
221k, 1%
UV
IN
R4
100k, 1%
C
VCC
10碌F
6.3V
C
VCC
Ceramic
8050
X5R
RZ3
4.64k, 1%
C3
47碌F
6.3V
C4
47碌F
6.3V
CZ3
220pF
V
OUT
鈮?/div>
VIN
0.8V - 3.3V
0 - 10 A
R1
68.1k, 1%
GND 3
QB
4
SS
CSS
47nF
1 2 3
FDS6676S
14.5A, 6.0m鈩?/div>
CZ2
RZ2
GND2
C3, C4
Ceramic
1210
X5R
V
OUT
=(R1/R2 +1)V
FB
820pF 40.2k, 1%
CP1
CF1
100pF
56pF
fs=900Khz
R2
21.5k, 1%
Date: 5/25/04
SP6137HV Dual Supply, Synchronous Buck Controller
漏 Copyright 2004 Sipex Corporation
1

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