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L1087-3.3 Datasheet

  • L1087-3.3

  • 0.8A Fixed and Adjustable Low Dropout Linear Regulator (LDO)

  • 6頁

  • ETC

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NIKO-SEM
0.8A Fixed and Adjustable Low Dropout
Linear Regulator (LDO)
FEATURES
L1087 Series
SOT-89,TO-92
GENERAL DESCRIPTION
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.
These devices are fully protected against
over current faults, over temperature oper-
ation, reversed input polarity, reversed lead
insertion, transient voltage spike 鈥tc.
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.
Fixed 3.3V or adjustable output voltage
Low dropout voltage
Low ground current
Fast transient response
Current & thermal limiting
Line regulation: 0.5% typical
Load regulation: 0.5% typical
Available in SOT-89 & TO-92 package
APPLICATIONS
Low voltage micro-controllers
Battery Chargers
5V to 3.3V linear regulators
Motherboard clock supplies
Post regulator for switching supplies
TYPICAL APPLICATION
Vin
IN
L1087
OUT
ADJ
Vref
Vout
Vin > 4.75V
IN
L1087-3.3
OUT
Vout = 3.3V
R1
+
Cin
10uF
+
Cout
10uF
Cin
10uF
GND
+
Cout
10uF
+
RL
Iadj
R2
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 -
1
AUG-30-2001

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