SP6132 Datasheet, PDF (1/14 Pages) Sipex Corporation – Wide Input, 300KHz Synchronous PWM Controller

®
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 V_CC and V_IN
■ 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
V_CC 1
GL 2
GND 3
V_FB 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 V_CC
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
V_CC
8765
QT
FDS7088N3
4
21A, 5mΩ
123
C1
22µF
16V
C2
22µF
16V
C1, C2
Ceramic
1210
X5R
VIN
12V
GND
R3
221k, 1%
UV_IN
R4
100k, 1%
DBST
MBR0530
C_{VCC GND 3}
10µF
6.3V
C_VCC
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
V_OUT
3.3V
0 - 10 A
R1
68.1k, 1%
R2
21.5k, 1%
Date: 8/4/04
SP6132 Wide Input, 300KHz Synchronous PWM Controller
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© Copyright 2004 Sipex Corporation