SP6132 データシートの表示（PDF） - Signal Processing Technologies
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SP6132 Datasheet PDF : 14 Pages
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SP6132
Wide Input, 300KHz Synchronous PWM Controller
FEATURES
■ 3V to 12V Step Down Achieved Using Dual Input
■ 2A to 15A Ouput Capability
■ Highly Integrated Design, Minimal Components
■ UVLO Detects Both VCC and VIN
■ Short Circuit Protection with Auto-Restart
■ On-Board 1.5Ω sink (2Ω source) NFET Drivers
■ Wide BW Amp Allows Type II or III Compensation
■ Programmable Soft Start
■ Fast Transient Response
■ High Efficiency: Greater than 95% Possible
■ A Synchronous Start-Up into a Pre-Charged Output
■ Small 10-Pin MSOP Package
VCC 1
GL 2
GND 3
VFB 4
COMP 5
SP6132
10 Pin MSOP
10 BST
9 GH
8 SWN
7 SS
6 UVIN
Now Available in Lead Free Packaging
DESCRIPTION
The SP6132 is wide input, synchronous step-down switching 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 VCC
voltage minimizes power dissipation in the part. The SP6132 is designed to drive a pair of external NFETs using a fixed
300kHz frequency, PWM voltage mode architecture. Protection features include UVLO, thermal shutdown and output
short circuit protection. The SP6132 is available in the cost and space saving 10-pin MSOP.
TYPICAL APPLICATION CIRCUIT
VCC
8765
QT
FDS7088N3
4
21A, 5mΩ
123
C1
22µF
16V
C2
22µF
16V
C1, C2
Ceramic
1210
X5R
VIN
12V
GND
R3
221k, 1%
UVIN
R4
100k, 1%
DBST
MBR0530
CVCC GND 3
10µF
6.3V
CVCC
Ceramic
0805
X5R
C7
0.1µF
CF1
100pF
U1
1 VCC
BST 10
2 GL SP6132 GH 9
3 GND
SWN 8
4 VFB
SS 7
5 COMP UVIN 6
CBST
1µF
10V
R5
5.11, 1%
SS
L1 SC5018-2R7M
8 7 6 5 2.7µH @ 12A
DCR=4.30mΩ
QB
4
FDS7088N3
21A, 5mΩ
123
C3
47µF
6.3V
C4
47µF
6.3V
CZ2 RZ2
CSS
47nF
GND2
1500pF 27.4k, 1%
CP1
22pF
C3, C4
Ceramic
1210
X5R
fs=300Khz
ALL RESISTORS AND CAPS ARE 0603 UNLESS OTHERWISE SPECIFIED
Q1, Q2 BOTTOM SIDE DRAIN CONTACT
RZ3
4.64k, 1%
CZ3
220pF
VOUT
3.3V
0 - 10 A
R1
68.1k, 1%
R2
21.5k, 1%
Date: 8/4/04
SP6132 Wide Input, 300KHz Synchronous PWM Controller
1
© Copyright 2004 Sipex Corporation
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