Fairchild FAN5029MPX 8-bit programmable 2- to 5-phase synchronous buck controller Datasheet

FAN5029
8-Bit Programmable 2- to 5-Phase Synchronous Buck Controller
Description
Features
• Selectable 2-, 3-, 4-, or 5-phase operation at up to
1MHz per phase
• ±7.7mV worst-case differential sensing error
• Active current balancing between the output phases
• Power good and crowbar blanking supports on-thefly VID code changes
• Selectable VR10 extended (7-bit) and VR11 (8-bit)
VID tables
• Programmable short-circuit protection and latch-off
delay
• Programmable soft start ramp
The FAN5029 is a multi-phase buck switching
regulator controller optimized to convert a 12V input
supply to the processor core voltage required by highperformance Intel® processors. It has an internal 8-bit
DAC that converts a digital voltage identification (VID)
code that is sent from the processor to set the output
voltage between 0.5V and 1.6V. It outputs a PWM to
external MOSFET drivers that, in turn, drive the
switching power MOSFETs. The switching frequency
of the design is programmable by a single resistor
value and the number of phases can be programmed
to support 2-, 3-, 4-, or 5-phase applications.
The FAN5029 also includes programmable no-load
offset and droop functions to adjust the output voltage
as a function of the load current, as required by the
Intel specifications. The FAN5029 also provides an
accurate and reliable short-circuit protection function
with an adjustable over-current set point.
Applications
• Desktop PC/Server processor power supplies for
existing and next generation Intel processors
• VRM modules products
The FAN5029 is specified over the extended
commercial temperature range of 0°C to +85°C and is
available in a 40-lead MLP package.
Part Numbers
• FAN5029MPX is not for new designs.
• The FAN5029MPX_NAAC238 replaces the
FAN5029MPX and is compatible with all VR10 and
VR11 processors.
Ordering Information
Part Number
Temperature
Range
Package
Type
FAN5029MPX
FAN5029MPX_NAAC238
Lead
Free
Packing Method
Quantity
per Reel
Not For New Designs
0°C to 85°C
MLP-40
Yes
Tape and Reel
3,000
For more information, please contact Ron Berthiaume at [email protected].
© 2004 Fairchild Semiconductor Corporation
FAN5029 Rev. 1.1.3
www.fairchildsemi.com
FAN5029 — 8-Bit Programmable 2- to 5-Phase Synchronous Buck Controller
January 2007
FAN5029 — 8-Bit Programmable 2- to 5-Phase Synchronous Buck Controller
Block Diagram
Figure 1: Block Diagram
© 2004 Fairchild Semiconductor Corporation
FAN5029 Rev. 1.1.3
www.fairchildsemi.com
2
ACEx™
ActiveArray™
Bottomless™
Build it Now™
CoolFET™
CROSSVOLT™
DOME™
EcoSPARK™
2
E CMOS™
EnSigna™
®
FACT
FACT Quiet Series™
®
FAST
FASTr™
FPS™
FRFET™
GlobalOptoisolator™
GTO™
HiSeC™
2
I C™
i-Lo™
ImpliedDisconnect™
IntelliMAX™
ISOPLANAR™
LittleFET™
MICROCOUPLER™
MicroFET™
MicroPak™
MICROWIRE™
MSX™
MSXPro™
OCX™
OCXPro™
®
OPTOLOGIC
OPTOPLANAR™
PACMAN™
POP™
Power247™
PowerEdge™
PowerSaver™
®
PowerTrench
®
QFET
QS™
QT Optoelectronics™
Quiet Series™
RapidConfigure™
RapidConnect™
ScalarPump™
μSerDes™
®
SILENT SWITCHER
SMART START™
SPM™
Stealth™
SuperFET™
SuperSOT™-3
SuperSOT™-6
SuperSOT™-8
SyncFET™
TCM™
TinyBoost™
TinyBuck™
®
TinyLogic
TINYOPTO™
TinyPower™
TinyPWM™
TruTranslation™
®
UHC
UniFET™
VCX™
Wire™
Across the board. Around the world.™
Programmable Active Droop™
®
The Power Franchise
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HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE
APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER
ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S
WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS.
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FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR
SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
1.
Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body or
(b) support or sustain life, and (c) whose failure to perform
when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
result in a significant injury of the user.
2.
A critical component in any component of a life
support, device, or system whose failure to perform
can be reasonably expected to cause the failure of the
life support device or system, or to affect its safety or
effectiveness.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Advance Information
Formative or In
Design
This datasheet contains the design specifications for product
development. Specifications may change in any manner without
notice.
Definition
Preliminary
First Production
This datasheet contains preliminary data; supplementary data will
be published at a later date. Fairchild Semiconductor reserves the
right to make changes at any time without notice to improve design.
No Identification Needed
Full Production
This datasheet contains final specifications. Fairchild
Semiconductor reserves the right to make changes at any time
without notice to improve design.
Obsolete
Not In Production
This datasheet contains specifications on a product that has been
discontinued by Fairchild Semiconductor. The datasheet is printed
for reference information only.
Rev. I22
© 2004 Fairchild Semiconductor Corporation
FAN5029 Rev. 1.1.3
www.fairchildsemi.com
3
FAN5029 — 8-Bit Programmable 2- to 5-Phase Synchronous Buck Controller
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