0.8A Fixed and Adjustable Low Dropout L1087 Series
NIKO-SEM
SOT-89,TO-92
Linear Regulator (LDO)
GENERAL DESCRIPTION
FEATURES
The L1087 Series are positive and low
dropout three-terminal voltage regulators
with 0.8A output current capability. These
devices are designed for use in low voltage
applications that offers lower dropout volt-
age and faster transient response.
Fixed 3.3V or adjustable output voltage
Low dropout voltage
Low ground current
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Fast transient response
Current & thermal limiting
Line regulation: 0.5% typical
Load regulation: 0.5% typical
Available in SOT-89 & TO-92 package
These devices are fully protected against
over current faults, over temperature oper-
ation, reversed input polarity, reversed lead
insertion, transient voltage spike …etc.
APPLICATIONS
Low voltage micro-controllers
Battery Chargers
5V to 3.3V linear regulators
Motherboard clock supplies
Post regulator for switching supplies
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On-Chips trimming the reference voltage to
1% and features the low dropout of maxi-
mum 1.45 volts.
The L1087 Series regulators offer fixed and
adjustable voltage options available in the
space saving SOT-89 & TO-92 package.
TYPICAL APPLICATION
Vin
Vout
Vin > 4.75V
L1087
ADJ
IN
Vout = 3.3V
IN
OUT
L1087-3.3
GND
OUT
Vref
R1
R2
Cin
Cout
10uF
Cin
Cout
10uF
+
+
+
+
RL
10uF
10uF
Iadj
Vo = Vref (1+R2/R1) + Iadj x R2
1. Cin needed if device is far from filter capacitors.
2. Cout required for stability.
1. Cin needed if device is far from filter capacitors.
2. Cout required for stability.
- Basic Adjustable Regulator Circuit -
- Fixed Voltage Regulator -
AUG-30-2001
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