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RC1587
3A Adjustable/Fixed Low Dropout Linear Regulator
Features
鈥?Fast transient response
鈥?Low dropout voltage at up to 3A
鈥?Load regulation: 0.05% typical
鈥?Trimmed current limit
鈥?On-chip thermal limiting
鈥?Standard TO-220, TO-263, TO-263 center cut,
and TO-252 packages
Description
The RC1587, RC1587-1.5, and RC1587-3.3 are low dropout
three-terminal regulators with 3A output current capability.
These devices have been optimized for low voltage applica-
tions including V
TT
bus termination, where transient response
and minimum input voltage are critical. The RC1587 is ideal
for low voltage microprocessor applications requiring a reg-
ulated output from 1.5V to 3.6V with an input supply of 5V
or less. The RC1587-1.5 offers 鏗亁ed 1.5V with 3A current
capability for GTL+ bus V
TT
termination. The RC1587-3.3
offers 鏗亁ed 3.3V current capability for logic IC operation.
Current limit is trimmed to ensure speci鏗乪d output current and
controlled short-circuit current. On-chip thermal limiting pro-
vides protection against any combination of overload and
ambient temperature that would create excessive junction
temperatures.
The RC1587, RC1587-1.5, and RC1587-3.3 are available in
the industry-standard TO-220, TO-263, TO-263 center cut,
and TO-252 (DPAK) power packages.
Applications
鈥?Pentium
廬
Class GTL+ bus supply
鈥?Low voltage logic supply
鈥?Post regulator for switching supply
Typical Applications
V
IN = 3.3V
10碌F
+
RC1587
V
IN
V
OUT
ADJ
124鈩?/div>
+
1.5V at 3A
22碌F
24.9鈩?/div>
V
IN = 3.3V
+
10碌F
RC1587-1.5
V
IN
V
OUT
GND
+
1.5V at 3A
22碌F
V
IN = 5V
+
10碌F
RC1587-3.3
V
IN
V
OUT
GND
+
3.3V at 3A
22碌F
65-1587-16
Pentium is a registered trademark of Intel Corporation.
REV. 1.5 1/12/01
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