FAN1616A Datasheet, PDF (1/8 Pages) Fairchild Semiconductor – 0.5A Adjustable/Fixed Low Dropout Linear Regulator

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FAN1616A
0.5A Adjustable/Fixed Low Dropout Linear Regulator
Features
• Low dropout voltage
• Load regulation: 0.05% typical
• Current limit
• On-chip thermal limiting
• Standard SOT-223 and TO-252 packages
• Three-terminal adjustable or fixed 1.8V, 2.5V, 3.3V or 5V
• Specified from -40°C to +125°C
Applications
• USB Controlled Power Supply
• High efficiency linear regulators for Mixed Voltage
Logic, ASIC, FPGA based systems
• Post regulators for switching supplies
• Battery chargers
• 12V to 5V, 3.3V, 2.5V, 1.8V, or adj linear regulators
• Motherboard clock supplies
• SDRAM Module supplies
Description
The FAN1616A, FAN1616A-1.8, -2.5, -3.3 and -5 are low
dropout three-terminal regulators with 0.5A output current
capability. These devices have been optimized for applica-
tions where transient response and minimum dropout voltage
are critical. The 5V version is designed also to be used in
USB Hub and Motherboard applications.
On-chip thermal limiting provides protection against any
combination of overload and ambient temperature that
would create excessive junction temperatures.
Unlike PNP type regulators where up to 10% of the output
current is wasted as quiescent current, the bias current of the
FAN1616A flows into the load, increasing efficiency.
The FAN1616A series regulators are available in the
industry-standard SOT-223 and TO-252 power packages.
Typical Applications
V_IN = 12V
+
10µF
FAN1616A
V_IN
V_OUT
ADJ
V_OUT = V_REF(1 + R2/R1) + I_Adj • R2
V_IN = 9V
+
10µF
FAN1616A-3.3
V_IN
V_OUT
GND
R1
124Ω
+
9V at 0.5A
22µF
R2
768Ω
+
3.3V at 0.5A
22µF
REV. 1.0.5 3/1/02