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Silicon Standard

SS7529 Datasheet Preview

SS7529 Datasheet

Synchronous Buck PWM and Linear Power Controller

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SS7529
Synchronous Buck PWM and Linear Power Controller
FEATURE
Controller operates from 5V and 12V
Drives two N-channel MOSFETs for switching buck
converter
Drives an N-channel MOSFET on the linear output
Fixed 600kHz constant switching frequency
Full range 0~100% duty cycle
Internal soft start
Fast transient response
UVP monitoring on both outputs
Internal 0.8V reference voltage.
APPLICATIONS
Graphics-GPU and memory supplies
ASIC power supplies
Embedded processor and I/O supplies
Cable Modem, Set Top Box, and DSL Modems
DSP and Core Communications Processor
supplies
GENERAL DESCRIPTION
The SS7529 consists of a dual-output power controller
and the protection circuits in a single SO-14 package
for graphic cards and other applications.
The dual-output power controller provides regulation by
driving two N-MOSFETs in a synchronous rectified buck
converter, and one N-MOSFET in a linear configuration.
The synchronous rectified buck converter provides
simple, single feedback loop, voltage mode control with
fast transient response, from an internal 0.8V temperature-
compensated reference voltage. A fixed 600kHz
frequency oscillator reduces design complexity, while
balancing typical application cost and efficiency.
The internal soft-start function and the 12V direct drive
on the switching output help to save the bootstrap circuit.
Furthermore, the internal POR (power on reset) helps to
prevent the system from sequencing issues during the
startup and turn-off. Reacting to fault conditions,
the SS7529 will shutdown both outputs when the
voltage on either FB or FB2 pins drops below 51% of
their nominal value.
TYPICAL APPLICATIONS
Vin (3.3V or 5V)
www.DataSheet.net/
5V
Q3
5VCC
12VCC
12V
Vout
DRIVE2
FB2
Linear
Controller
Vref
Control
Logic
Shutdown
FB
Comp
Error Amp
OSC
GND
UGATE
Q1
Vout
LGATE
PGND
Q2
Rev.1.01 4/26/2004
www.SiliconStandard.com
1 of 8
Datasheet pdf - http://www.DataSheet4U.co.kr/




Silicon Standard

SS7529 Datasheet Preview

SS7529 Datasheet

Synchronous Buck PWM and Linear Power Controller

No Preview Available !

ORDERING INFORMATION
SS7529
PINOUT INFORMATION
SS7529CSXX
Packing:
TB: tubes
TR: tape and reel
Package type:
S: small outline SO-14
For example: SS7529CSTR
SS7529 in SO-14 shipped in tape and reel
LGATE 1
PGND 2
GND 3
5VCC 4
DRIVER2 5
FB2 6
NC 7
SS7529
14 UGATE
13 12VCC
12 NC
11 NC
10 COMP
9 FB
8 NC
BLOCK DIAGRAM
5VCC
12VCC
UVLO/POR
FB2
DRIVE2
FB
Comp
Vref
Control
Logic
www.DataSheet.net/
RE-
START UV
Detection
INHIBIT/SOFT START
SHUTDOWN
161%
Vref
FB2
FB
FB2
51%
Vref
Error Amp
PWM
Comparator
5V
Dead Time
Control
Oscillator
UGATE
LGATE
PGND
GND
Rev.1.01 4/26/2004
www.SiliconStandard.com
2 of 8
Datasheet pdf - http://www.DataSheet4U.co.kr/


Part Number SS7529
Description Synchronous Buck PWM and Linear Power Controller
Maker Silicon Standard
Total Page 8 Pages
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