Low Dropout Regulator
General Description
The
EC1086
is a series of low dropout positive voltage
regulators with a maximum dropout of 1.5V at 1.5A of
load current.
The
EC1086
is available in 1.5V, 1.8V, 2.5V, 3V, 3.3V,
and 5.0V versions. The fixed versions integrate the
adjust resistors. It is also available in an adjustable ver-
sion, which can set the output voltage with only two
external resistors.
The series features on-chip thermal shutdown. It also
includes a bandgap reference and a current limiting cir-
cuit.
The
EC1086
series is available in standard packages of
TO-263-3L, TO-220, SOT-223 and TO-252.
EC1086
Features
Available in 1.5V, 1.8V, 2.5V, 3V, 3.3V, 5.0V and
adjustable versions
Low dropout voltage: typical 1.3V at 1.5A
Current limiting and thermal protection
Low dropout voltage
Output current: 1.5A
Current limit: 2.3A
Operating junction temperature range: 0 ~ 125
o
C
Line regulation: 0.015% (typ.)
Load regulation: 0.1% (typ.)
Applications
High efficiency linear regulators
Battery charger
Post regulation for switching supply
Microprocessor supply
Motherboard power supply
Cable and ADSL modem
DVD-Video player
Telecom equipment
Set top boxes and web boxes modules' supply
TO-263-3L
TO-220
SOT-223
TO-252
Figure 1. Package Types of
EC1086
July 2003
Low Dropout Regulator
Absolute Maximum Ratings (Note 1)
Parameter
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
ESD (Human Body Mode)
Symbol
T
J
T
S
T
LEAD
ESD
-65
Min
Max
150
150
300
2000
EC1086
Unit
o
o
o
C
C
C
V
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond
those indicated under"Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum
Ratings" for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Input Voltage
Operating Junction Temperature Range
Symbol
V
IN
T
J
0
Min
Max
15
125
Unit
V
o
C
July 2003
Low Dropout Regulator
Electrical Characteristics
EC1086
Typicals and limits appearing in normal type apply for T
J
= 25
o
C. Limits appearing in
Boldface
type apply over
the entire junction temperature range for operation, 0
o
C to 125
o
C. (P
D
≤
maximum power dissipation , see Note 2.)
Parameter
Reference Voltage
Symbol
V
REF
Conditions
EC1086-ADJ,
I
OUT
= 10mA, V
IN
-V
OUT
= 2V, T
J
= 25
o
C,
10mA
≤
I
OUT
≤
1.5A, 1.4V
≤
V
IN
- V
OUT
≤
6V
EC1086-1.5,
I
OUT
=10mA, V
IN
= 3.5V, T
J
= 25
o
C,
10mA
≤
I
OUT
≤
1.5A, 3V
≤
V
IN
≤
10V
EC1086-1.8,
I
OUT
= 10mA, V
IN
= 3.8V, T
J
= 25
o
C,
10mA
≤
I
OUT
≤ 1.
5A, 3.2V
≤
V
IN
≤
10V
EC1086-2.5,
I
OUT
= 10mA, V
IN
= 4.5V, T
J
= 25
o
C,
10mA
≤
I
OUT
≤
1.5A, 3.9V
≤
V
IN
≤
10V
EC1086-3.0,
I
OUT
= 10mA, V
IN
= 4.5V, T
J
= 25
o
C,
10mA
≤
I
OUT
≤
1.5A, 4.9V
≤
V
IN
≤
10V
EC1086-3.3,
I
OUT
= 10mA, V
IN
= 5V, T
J
= 25
o
C,
10mA
≤
I
OUT
≤
1.5A, 4.75V
≤
V
IN
≤
10V
EC1086-5.0,
I
OUT
= 10mA, V
IN
= 7V, T
J
= 25
o
C,
10mA
≤
I
OUT
≤
1.5A, 6.5V
≤
V
IN
≤
10V
Min
1.238
1.225
Typ
1.250
1.250
Max
1.262
1.270
Unit
V
Output Voltage
V
OUT
1.485
1.47
1.5
1.5
1.515
1.53
V
1.782
1.746
1.8
1.8
1.818
1.854
V
2.475
2.45
2.5
2.5
2.525
2.55
V
2.97
2.94
3.0
3.0
3.03
3.06
V
3.267
3.235
3.3
3.3
3.333
3.365
V
4.95
4.9
5
5
0.015
0.035
0.3
0.6
0.3
0.6
0.3
0.6
0.3
0.6
0.5
1
0.5
1
5.05
5.1
0.2
0.2
6
6
6
6
6
6
6
6
10
10
10
10
V
Line Regulation
∆V
OUT
EC1086-ADJ,
I
OUT
= 10mA,
1.5V
≤
V
IN
≤
10V
I
OUT
= 10mA,
1.5V
≤
V
IN
- V
OUT
≤
10V
I
OUT
= 10mA,
1.5V
≤
V
IN
- V
OUT
≤
10V
I
OUT
= 10mA,
1.5V
≤
V
IN
- V
OUT
≤
10V
I
OUT
= 10mA,
1.5V
≤
V
IN
- V
OUT
≤
10V
I
OUT
= 10mA,
1.5V
≤
V
IN
- V
OUT
≤
10V
I
OUT
= 10mA,
1.5V
≤
V
IN
- V
OUT
≤
10V
%
mV
mV
mV
mV
mV
mV
EC1086-1.5,
EC1086-1.8,
EC1086-2.5,
EC1086-3.0,
EC1086-3.3,
EC1086-5.0,
July 2003
51mcu
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