FAN1655M(2004) 데이터 시트보기 (PDF) - Fairchild Semiconductor
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FAN1655M Datasheet PDF : 9 Pages
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FAN1655
3A DDR Bus Termination Regulator
www.fairchildsemi.com
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
8-pin 5x6mm MLP packages
• Low-Current Shutdown Mode
• Output Short Circuit Protection
Applications
• DDR Terminator VTT supply
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, standard SOIC-14, and an 8-Lead MLP
package.
Block Diagram
VDDQ
VDD
VDD VDD SHDN
VREFOUT
VREFIN
200k
-
+
+
200k
FAN1655
VSSQ
-
VSS VSS VSS
VTTFORCE
VTTFORCE
VTTSENSE
REV. 1.1.4 3/24/04
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