L1087-3.3 ETC, L1087-3.3 Datasheet

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L1087-3.3

Manufacturer Part Number
L1087-3.3
Description
0.8A Fixed and Adjustable Low Dropout Linear Regulator (LDO)
Manufacturer
ETC
Datasheet
NIKO-SEM
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.
TYPICAL APPLICATION
Vin
Cin
10uF
- Basic Adjustable Regulator Circuit -
1. Cin needed if device is far from filter capacitors.
2. Cout required for stability.
+
Vo = Vref (1+R2/R1) + Iadj x R2
IN
L1087
ADJ
Iadj
0.8A Fixed and Adjustable Low Dropout
OUT
Vref
Linear Regulator (LDO)
R1
R2
+
Vout
Cout
10uF
1
FEATURES
APPLICATIONS
Vin > 4.75V
Cin
10uF
1. Cin needed if device is far from filter capacitors.
2. Cout required for stability.
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
Low voltage micro-controllers
Battery Chargers
5V to 3.3V linear regulators
Motherboard clock supplies
Post regulator for switching supplies
- Fixed Voltage Regulator -
+
IN
L1087-3.3
GND
L1087 Series
Cout
10uF
OUT
SOT-89,TO-92
AUG-30-2001
+
Vout = 3.3V
RL

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L1087-3.3 Summary of contents

Page 1

... Motherboard clock supplies Post regulator for switching supplies Vout Vin > 4.75V R1 Cout Cin + 10uF 10uF R2 1. Cin needed if device is far from filter capacitors. 2. Cout required for stability. 1 L1087 Series SOT-89,TO-92 IN L1087-3.3 OUT GND Cout + + 10uF - Fixed Voltage Regulator - AUG-30-2001 Vout = 3.3V RL ...

Page 2

... IN OUT OUT 1. 5.75V IN OUT OUT f = 120Hz for ADJ pin, ADJ 0.8A IN OUT 2 L1087 Series SOT-89,TO- 125 °C -40 to 150 ° °C) A Typical Limits 1.23V 1.25V 1.27V 0.98V V O 1.02V 1.2V 1.45V 0.5% = 10mA OUT 0.5% 0.8A 10mA 55 A 100 A 1 ...

Page 3

... IN OUT OUT f = 120Hz, Co=22Uf 0.8A OUT L1087C L1087C-3.3 Adjustable 3.3V SOT-89 SOT-89 L1087 87-3.3 3 L1087 Series SOT-89,TO-92 (Unless otherwise specified °C) Typical Limits 3.234V V O 3.367V 1.2V 1.45V 0.5% = 10mA OUT 0.5% 0.8A 10mA 55 A 100 A 1.2A 0.9A (Min) 0.003 OUT 72dB 60dB (Min) L1087N-3 ...

Page 4

... Fixed and Adjustable Low Dropout NIKO-SEM PIN CONFIGURATIONS Linear Regulator (LDO) Pin # Function 1 Adjust/Ground 2 Output 3 Input Note: TAB is Output Pin Pin # Function 1 Output 2 Adjust/Ground 3 Input 4 L1087 Series SOT-89,TO-92 AUG-30-2001 ...

Page 5

... Fixed and Adjustable Low Dropout NIKO-SEM Dimension Min. Typ. A 4.3 B 1.6 C 0.4 D 2.4 E 0.8 F 0.4 0.45 G 0.4 Linear Regulator (LDO) SOT-89 MECHANICAL DATA mm Dimension Max. 4.5 4.7 H 1.7 1.8 I 0.5 0.6 J 2.5 2.6 K 1.2 1.4 L 0.5 M 0.5 0 L1087 Series SOT-89,TO-92 mm Min. Typ. Max. 1.4 1.5 1.6 2.8 3.0 3.2 1.3 1.5 1.7 3.8 4.2 4.6 0.3 0.4 0.5 AUG-30-2001 ...

Page 6

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

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