鈻?/div>
3V to 28V 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 1.5鈩?sink (2鈩?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
10
BST
SP6132H
10 Pin MSOP
9
GH
8
SWN
7
SS
6
UVIN
Now Available in Lead Free Packaging
DESCRIPTION
The SP6132H 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 SP6132H 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 SP6132H is available in the cost and space saving 10-pin MSOP
.
TYPICAL APPLICATION CIRCUIT
VIN
3.0 - 28V
22碌F
22碌F
FDS7088N3
4
GND
V
CC
2.7碌H @ 12A
MBR0530
2.5V
10 A
V
OUT
4.64k, 1%
FDS7088N3
5.11, 1%
47nF
31.6k, 1%
4
SP6132H
VCC
BST
GH
SWN
SS
UVIN
GL
GND
VFB
COMP
1碌F
47碌F
47碌F
220pF
10碌F
221k, 1%
68.1k, 1%
100k, 1%
0.1碌F
100pF
1500pF 27.4k, 1%
22pF
Date: 5/5/04
SP6132H Dual Supply, Synchronous Buck Controller
漏 Copyright 2004 Sipex Corporation
1