SC1565
Very Low Dropout
1.5 Amp Regulator With Enable
POWER MANAGEMENT
Description
Features
The SC1565 is a high performance positive voltage
regulator designed for use in applications requiring very
low dropout voltage at up to 1.5 Amps. Since it has
superior dropout characteristics compared to regular
LDOs, it can be used to supply 2.5V on motherboards or
2.8V on peripheral cards from the 3.3V supply thus
allowing the elimination of costly heatsinks. Additionally,
the 5-lead TO-220/TO-263 and SO-8 versions have an
enable pin to further reduce power dissipation while shut
down. The SC1565 provides excellent regulation over
variations in line, load and temperature.
350mV dropout @ 1.5A
Adjustable output from 1.2V to 4.8V(1)
2.5V and 1.8V options (adjustable externally
using resistors)(1)
Over current and over temperature protection
Enable pin(1)
10µA quiescent current in shutdown(1)
Low reverse leakage (output to input)
Surface mount and through-hole packages
Full industrial temperature range
TO-220, TO-263, SOT-223 and SO-8 Packages
Note:
(1) SO-8, TO-220-5 and TO-263-5 packages only.
The SC1565 is available in SO-8, 3-lead SOT-223, 3 and
5 lead TO-220 and 3 and 5 lead TO-263 packages. Three
lead packages are available with 1.8V and 2.5V fixed
output options only. The SO-8, TO-220-5 and TO-263-5
are available with 1.8V and 2.5V internally preset
outputs that are also adjustable using external resistors.
Applications
Battery powered systems
Motherboards
Peripheral cards
Network cards
Set Top Boxes
Medical Equipment
Notebook Computers
Typical Application Circuits
U1
1
ENABLE
2
VIN
3
VO
4
R1
EN
GND
VO
GND
ADJ
8
GND
VIN
GND
U1
7
1
ENABLE
6
2
VIN
5
3
VO
SC1565IS-X.X
4
C1
C1
C2
EN
GND
VIN
GND
VO
GND
ADJ
GND
8
7
6
5
SC1565IS-X.X
C2
R2
VO
=
1.200 (R1 + R2)
R2
Volts
VO
U1
SC1565I5T-X.X
2
VIN
ENABLE
U1
SC1565IT-X.X
1
VIN
VIN
VO
1
3
VO
VIN
EN
VO
GND ADJ
=
1.200 (R1 + R2)
R2
4
5
Volts
VO
R1
3
C1
C2
GND
C1
C2
R2
2
Notes:
(1) Maximum VO setpoint for 1.8V parts = 5.4V.
(2) This device is designed to operate with ceramic input and output capacitors.
Revision: November 25, 2009
1
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