SP6136 Datasheet, PDF (1/18 Pages) Sipex Corporation – Synchronous Buck Controller

SP6136
Synchronous Buck Controller
FEATURES
■ 5V to 24V Input step down converter
■ Up to 7A output in a small form factor
16 15 14 13
■ Highly integrated design, minimal components
■ UVLO Detects Both V_CC and V_IN
GL 1
■ Overcurrent circuit protection with auto-restart PGND 2
SP6136
12 GH
11 _SWN
■ Power Good Output, ENABLE Input
■ Maximum Controllable Duty Cycle Ratio up to 92% ^{GND 3}
■ Wide BW amp allows Type II or III compensation _{VFB 4}
■ Programmable Soft Start
16 Pin QFN
3mm x 3mm
10 _ISP
9 _ISN
■ Fast Transient Response
■ Available in Lead Free, RoHS Compliant
5678
16-Pin QFN package
■ External Driver Enable/Disable
■ U.S. Patent #6,922,041
DESCRIPTION
The SP6136 is a synchronous step-down switching regulator controller optimized for high
efficiency. The part is designed to be especially attractive for single supply step down con-
version from 5V to 24V. The SP6136 is designed to drive a pair of external NFETs using
a fixed 600 KHz frequency, PWM voltage mode architecture. Protection features include
UVLO, thermal shutdown, output short circuit protection, and overcurrent protection with
auto restart. The device also features a PWRGD output and an enable input. The SP6136
is available in a space saving 16-pin QFN and offers excellent thermal performance.
TYPICAL APPLICATION CIRCUIT
C3
0.1uF
DBST
CVCC
4.7uF
SD101AWS
VIN
BST
VCC
GH
R5 10kΩ
POWERGOOD
NC
ENABLE
PWRGD
SWN
UVIN
EN ^SP6136
GND
GL
CF1
22pF
CP1
12 pF
ISP
PGND
ISN
COMP
SS
VFB
CZ3
270pF
CZ2
560pF
RZ2
30.9kΩ
CBST
0.1uF
MT, Si4354DY
18.5 mΩ, 30V
Inter-Technical SC7232-2R2
2.2uH, 13A, 10.4mΩ
MB, Si4886DY
13.5 mΩ, 30V
RS1
5.11KΩ
RS2
5.11KΩ
RS3
10KΩ
CSS
47nF
CSP
6.8nF
CS
0.1uF
RZ3
1kΩ
VIN
CIN
22uF 12V
GND
VOUT
COUT
100uF 3.3V
0-7A
GND
R1
68.1kΩ, 1%
R2
21.5kΩ, 1%
Oct 31-06 Rev L
Note: Die attach paddle is internally connected to GND.
SP6136 Synchronous Buck Controller

© 2006 Sipex Corporation