FAIRCHILD FD2004

FD2004 — Adaptive Digital DC-DC Controller with
Current Sharing
1. Overview
1.1.
Features
Power Conversion
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Efficient Synchronous Buck Controller
Adaptive Performance Optimization Algorithms
4.5V to 14V Input Range
0.54V to 4V Output Range (with Margin)
± 1% VOUT Setpoint Accuracy
Fast Load Transient Response
Current Sharing and Phase Interleaving
Digitally Adjustable Current Sense Range
Snapshot™ Parametric Capture Mechanism
RoHS-Compliant (5 x 5mm) QFN Package
Power Management
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Digital Soft-Start/Stop
The FD2004 is a digital DC-DC controller designed to
work with the FD1505 MOSFET driver IC. Current
sharing allows multiple devices to be connected in
parallel to source loads with very high current demands.
Adaptive performance optimization algorithms improve
power conversion efficiency across the load range. The
Digital-DC™ technology enables a blend of power
conversion performance and power management features.
The FD2004 is designed to be a flexible building block
for DC power and can be easily adapted to designs
ranging from a single-phase power supply operating
from a 4.5V input to a multi-phase supply operating
from a 12V input. The FD2004 eliminates the need for
complicated power supply managers as well as
numerous external discrete components.
Operating features can be configured by pin-strap /
resistor selection or through the SMBus serial interface.
The SMBus is also used for communication with a host
controller. For inter-device communication with other
Digital-DC devices, the single-wire DDC bus is used.
Power Good / Enable
Voltage Tracking, Sequencing, and Margining
Voltage / Current / Temperature Monitoring
SMBus Communication (PMBus™ Compliant)
Output Voltage and Current Protection
Internal Non-volatile Memory (NVM)
Applications
Servers / Storage Equipment
Telecom / Datacom Equipment
Power Supplies (Memory, DSP, ASIC, FPGA)
IMPORTANT NOTE:
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Description
Precision Delay and Ramp-up
1.2.
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1.3.
Figure 1. Block Diagram
For additional information, please contact
[email protected]
© 2008 Fairchild Semiconductor Corporation
FD2004 • Rev. 1.3.1
www.fairchildsemi.com
FD2004 — Adaptive Digital DC-DC Controller with Current Sharing
September 2008
FD2004 — Adaptive Digital DC-DC Controller with Current Sharing
Digital-DC™, and Snapshot™ are trademarks of Zilker Labs, Inc., used under license by Fairchild Semiconductor. All other
products or brand names mentioned herein are trademarks of their respective holders.
PMBus™ is a trademark of the PMB Implementers Forum and System Management Interface Forum (SMIF).
© 2008 Fairchild Semiconductor Corporation
FD2004 • Rev. 1.3.1
www.fairchildsemi.com
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