FAN1655 Fairchild Semiconductor, FAN1655 Datasheet
FAN1655
Manufacturer Part Number
FAN1655
Description
3A DDR Bus Termination Regulator
Manufacturer
Fairchild Semiconductor
Datasheet
1.FAN1655.pdf
(9 pages)
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Features
• Sinks and sources 2.1A continuous, 3A peak
• 0 to +125°C operating temperature range
• 5mA Buffered VREFOUT = VDDQ/2
• Load regulation: VTT = VREFOUT ± 40mV
• On-chip thermal limiting
• Low Cost SO-14, Power Enhanced eTSSOP or
• Low-Current Shutdown Mode
• Output Short Circuit Protection
Applications
• DDR Terminator VTT supply
Block Diagram
FAN1655
3A DDR Bus Termination Regulator
8-pin 5x6mm MLP packages
VREFOUT
VREFIN
VDDQ
VSSQ
200k
200k
FAN1655
VDD
+
-
VSS
VDD
Description
The FAN1655 is a low-cost bi-directional LDO specifically
designed for terminating DDR memory bus. It can both sink
and source up to 2.1A continuous, 3A peak, providing
enough current for most DDR applications. Load regulation
meets the JEDEC spec, VTT = VREFOUT ± 40mV.
The FAN1655 includes a buffered reference voltage capable
of supplying up to 5mA current. On-chip thermal limiting
provides protection against a combination of power overload
and ambient temperature that would create an excessive
junction temperature. A shutdown input puts the FAN1655
into a low power mode.
The FAN1655 regulator is available in a power-enhanced
eTSSOP™-16 package, and the standard SOIC-14
VSS
VDD
VSS
+
-
SHDN
VTTFORCE
VTTFORCE
VTTSENSE
www.fairchildsemi.com
REV. 1.1.3 2/20/03
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