ETC1 LM1086T-2.5 1.5a low dropout voltage regulator (adjustable & fixed) Datasheet

LM1086
1.5A LOW DROPOUT VOLTAGE REGULATOR (Adjustable & Fixed)
SOT-223 PKG (FRONT VIEW)
FEATURES
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Low Dropout Voltage 500mV at 1.5A Output Current
Fast Transient Response
0.015% Line Regulation
0.1% Load Regulation
Internal Thermal and Current Limiting
Adjustable or Fixed Output Voltage(1.5, 2.5, 2.85, 3.0, 3.3, 5.0V)
Surface Mount Package SOT-223 & TO-263 (D2 Package)
100% Thermal Limit Burn-in
1
2
PIN FUNCTION
1. Adj/Gnd
2. Vout
3. Vin
3
TO-263 (D2 PKG, FRONT VIEW)
APPLICATIONS
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Battery Charger
Adjustable Power Supplies
Constant Current Regulators
Portable Instrumentation
High Efficiency Linear Power Supplies
High Efficiency "Green" Computer Systems
SMPS Post-Regulator
Power PC Supplies
Powering VGA & Sound Card
PIN FUNCTION
1. Adj/Gnd
2. Vout
3. Vin
1
2
3
ORDERING INFORMATION
Device & Marking
LM1086S-XX
LM1086T-XX
DESCRIPTION
Package
SOT 223
TO263 (D2)
(XX=Vout=1.5V, 2.5V, 2.85V, 3.0V, 3.3V, 5.0V
Adjustable= AD)
The LM1086 is a low dropout three terminal regulator with 1.5A output current capability.
The output voltage is adjustable with the use of a resistor divider. Dropout is guaranteed at a maximum
of 500 mV at maximum output current.
It's low dropout voltage and fast transient response make it ideal for low voltage microprocessor
applications. Internal current and thermal limiting provides protection against any overload condition
that would create excessive junction temperature.
TEST & TYPICAL APPLICATION CIRCUIT
3
VIN
5V
+
2
VOUT
3.33V
LM1086
1
ADJ
VREF
C1
10㎌
VREF=VOUT-VADJ=1.25V(Typ.)
VOUT=VREFx(1+RF2/RF1)+IADJxRF2
IADJ=55㎂(Typ.)
RF1
124Ω
1%
C2
10㎌
RF2
205Ω
1%
(1) C1 Needed if device is far away
from filter capacitors.
(2) C2 Required for stability
Adjustable Voltage Regulator
HTC
1
1.5A LOW DROPOUT VOLTAGE REGULATOR(ADJ)
LM1086
ABSOULTE MAXIMUM RATINS
SYMBOL
CHARACTERISTIC
VALUE
UNIT
Vin
7
V
Operating Junction Temperature Range
Topr
0~125
℃
Storage Temperature Range
Tstg
-65~150
℃
Supply Voltage
Thermal Resistance Junction to Case TO-263
Tjc
3
C/W
Thermal Resistance Junction to Ambient TO-263
Tja
60
C/W
Lead Temperature (Soldering) 10 sec.
Tsol
300
℃
Maximum Output Current
Imax
1.5
A
ELECTRICAL CHARACTERISTICS I
OUT =100㎃,
PARAMETER
T A=25℃, unless otherwise specified
TEST CONDITIONS
MIN
TYP
MAX
UNIT
1.485
1.5
1.515
V
0<IOUT<1.5A, 3.5V<V IN<7V
2.475
2.5
2.525
V
0<IOUT<1.5A, 4.35V<V IN<7V
2.822
2.85
2.879
V
0<IOUT<1.5A, 4.5V<V IN<7V
2.97
3
3.03
V
0<IOUT<1.5A, 4.75V<V IN<7V
3.27
3.3
3.33
V
0≤IOUT≤1.5A, 5.5V≤VIN<7V
4.95
5
5.05
V
1.5V Version
Output Voltage
0<IOUT<1.5A, 2.75V<V IN<7V
2.5V Version
Output Voltage
2.85V Version
Output Voltage
3.0V Version
Output Voltage
3.3V Version
Output Voltage
5.0V Version
Output Voltage
All Voltage Options
Reference Voltage (V REF)
VIN≤7V,P≤PMAX
1.225
1.25
1.27
1.5V≤(VIN-VOUT)≤5.75V, 10㎃≤IOUT≤1.5A
1.225
1.25
1.27
Min. Load Current(Note 3)
1.5V≤(VIN-VOUT)≤5.75V
Line Regulation (ΔV REF(VIN))
2.75V≤VIN≤7V, IOUT=10㎃, TJ=25℃
V
5
10
mA
0.005
0.2
%
Load Regulation (ΔV REF(VOUT))
10㎃≤IOUT≤1.5A,(VIN-VOUT)=3V,TJ=25℃
0.05
0.3
%
Dropout Voltage
ΔVREF=1% , Iout=1.5A
1.1
1.2
V
Current Limit
Vin-Vout=3V
IOUT(MAX)
Long Term Stability
Thermal Regulation
(ΔVOUT(Pwr))
Output Noise, RMS
Thermal Resistance
1.7
1.4V≤(VIN-VOUT) Adjustable Only
2.5
A
TA=125℃, 1000Hrs
0.3
1
%
TA=25℃, 30㎳ pulse
0.01
0.02
%/W
10Hz to 10Khz TA=25℃
%/Vo
0.003
Junction to Tab
3
Junction to Ambient
60
℃/W
HTC
2
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