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RC1117M33T Datasheet(PDF) 1 Page - Fairchild Semiconductor

Part No. RC1117M33T
Description  1A Adjustable/Fixed Low Dropout Linear Regulator
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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RC1117M33T Datasheet(HTML) 1 Page - Fairchild Semiconductor

   
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REV. 1.3.2 10/16/03
Features
• Low dropout voltage
• Load regulation: 0.05% typical
• Trimmed current limit
• On-chip thermal limiting
• Standard SOT-223, TO-263, and TO-252 packages
• Three-terminal adjustable or fixed 2.5V, 2.85V, 3.3V, 5V
Applications
• Active SCSI terminators
• High efficiency linear regulators
• Post regulators for switching supplies
• Battery chargers
• 5V to 3.3V linear regulators
• Motherboard clock supplies
Description
The RC1117 and RC1117-2.5, -2.85, -3.3 and -5 are low
dropout three-terminal regulators with 1A output current
capability. These devices have been optimized for low voltage
where transient response and minimum input voltage are
critical. The 2.85V version is designed specifically to be
used in Active Terminators for SCSI bus.
Current limit is trimmed to ensure specified output current
and controlled short-circuit current. On-chip thermal limiting
provides protection against any combination of overload and
ambient temperatures that would create excessive junction
temperatures.
Unlike PNP type regulators where up to 10% of the output
current is wasted as quiescent current, the quiescent current
of the RC1117 flows into the load, increasing efficiency.
The RC1117 series regulators are available in the industry-
standard SOT-223, TO-263 (D2PAK), and TO-252 (DPAK)
power packages.
Typical Applications
VIN = 3.3V
VIN
VOUT
ADJ
1.5V at 1A
RC1117
10
µF22µF
R1
124
R2
24.9
VIN = 5V
VIN
VOUT
GND
2.85V at 1A
RC1117-2.85
10
µF
++
+
+
22
µF
VOUT = VREF(1 + R2/R1) + IAdj • R2
RC1117
1A Adjustable/Fixed Low Dropout Linear Regulator


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