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L1087-3.3 Schematic ( PDF Datasheet ) - ETC

Teilenummer L1087-3.3
Beschreibung 0.8A Fixed and Adjustable Low Dropout Linear Regulator (LDO)
Hersteller ETC
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Gesamt 6 Seiten
L1087-3.3 Datasheet, Funktion
NIKO-SEM
0.8A Fixed and Adjustable Low Dropout
Linear Regulator (LDO)
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 …etc.
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.
FEATURES
z Fixed 3.3V or adjustable output voltage
z Low dropout voltage
z Low ground current
z Fast transient response
z Current & thermal limiting
z Line regulation: 0.5% typical
z Load regulation: 0.5% typical
z Available in SOT-89 & TO-92 package
APPLICATIONS
z Low voltage micro-controllers
z Battery Chargers
z 5V to 3.3V linear regulators
z Motherboard clock supplies
z Post regulator for switching supplies
TYPICAL APPLICATION
Vin
Cin
10uF
+
L1087
IN OUT
ADJ
Vref
Iadj
Vout
R1
Cout
+
10uF
R2
Vin > 4.75V
IN
L1087-3.3
OUT
Vout = 3.3V
Cin
+
10uF
GND
Cout
+
10uF
RL
Vo = Vref (1+R2/R1) + Iadj x R2
1. Cin needed if device is far from filter capacitors.
2. Cout required for stability.
- Basic Adjustable Regulator Circuit -
1. Cin needed if device is far from filter capacitors.
2. Cout required for stability.
- Fixed Voltage Regulator -
1 AUG-30-2001






L1087-3.3 Datasheet, Funktion
NIKO-SEM
0.8A Fixed and Adjustable Low Dropout
Linear Regulator (LDO)
L1087 Series
SOT-89,TO-92
Dimension
A
B
C
D
E
F
G
Min.
4.445
4.318
12.7
0.356
1.143
3.175
0.762
TO-92 MECHANICAL DATA
mm
Typ.
1.27
Max.
5.207
5.334
15.5
0.533
1.397
4.191
1.270
Dimension
H
I
J
K
L
M
N
Min.
2.413
0.356
mm
Typ.
2.540
Max.
2.667
0.533
6 AUG-30-2001

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