LM1085 REGULATOR Datasheet

LM1085 Datasheet, PDF, Equivalent


Part Number

LM1085

Description

3A L.D.O. VOLTAGE REGULATOR

Manufacture

HTC

Total Page 8 Pages
Datasheet
Download LM1085 Datasheet


LM1085
3A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed)
LM1085
FEATURES
Output Current of 3A
Fast Transient Response
0.04% Line Regulation
0.2% Load Regulation
Internal Thermal and Current Limiting
Adjustable or Fixed Output Voltage(1.5V, 1.8V, 2.5V, 3.3V, 5.0V)
Surface Mount Package TO-263 3LD & TO-252 3L
100% Thermal Limit Burn-in
Low Dropout Voltage 1.5V at 3A Output Current
Moisture Sensitivity Level 3
TO-263 PKG
TO-252 PKG
APPLICATIONS
High Efficiency Linear Regulators / Power Supply
High Efficiency "Green" Computer Systems
Constant Current Regulators
Portable Instrumentation
SMPS Post-Regulator
Adjustable Power Supplies
Powering VGA & Sound Card
1. ADJ / GND 2. OUTPUT 3. INPUT
* Heatsink surface connected to Pin 2.
ORDERING INFORMATION
Device
Package
LM1085R-X.X
TO-263 3LD
LM1085RS-X.X
TO-252 3LD
(X.X=VOUT=1.5V, 1.8V, 2.5V, 3.3V, 5.0V, ADJ)
DESCRIPTION
The LM1085 series of positive adjustable and fixed regulators are designed to provide 3A with high efficient.
All internal circuitry is designed to operate down to 1.5V input to output differential.
On-chip trimming adjusts the reference voltage to 1%.
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
LM1085-3.3V
LM1085-ADJ
Note
(1) C1 needed if device is far away from filter capacitors.
(2) C2 minimum value required for stability
VREF=VOUT-VADJ=1.25V(Typ.)
IADJ=55(Typ.)
VOUT = VREF x (1+RF2/RF1) + IADJ x RF2
Nov. 2010-Rev. 1.4
-1-
HTC

LM1085
3A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed)
BLOCK DIAGRAM
LM1085
ABSOULTE MAXIMUM RATINGS
CHARACTERISTIC
Supply Voltage
Operating Temperature Range
Junction Temperarture
Storage Temperature Range
Thermal Resistance Junction to Case TO-263
Thermal Resistance Junction to Ambient TO-263
Lead Temperature (Soldering) 10 sec.
Maximum Output Current
SYMBOL
VIN
TA
TJ
Tstg
Tjc
Tja
Tsol
Imax
VALUE
12
-10 ~ 70
0 ~ 125
-65 ~ 150
3
60
300
3
UNIT
V
C/W
C/W
A
HTC
-2-


Features 3A L.D.O. VOLTAGE REGULATOR (Adjustable & Fixed) LM1085 FEATURES ● Output C urrent of 3A ● Fast Transient Respons e ● 0.04% Line Regulation ● 0.2% Lo ad Regulation ● Internal Thermal and Current Limiting ● Adjustable or Fixe d Output Voltage(1.5V, 1.8V, 2.5V, 3.3V , 5.0V) ● Surface Mount Package TO-26 3 3LD & TO-252 3L ● 100% Thermal Limi t Burn-in ● Low Dropout Voltage 1.5V at 3A Output Current ● Moisture Sensi tivity Level 3 TO-263 PKG TO-252 PKG APPLICATIONS ● High Efficiency Linear Regulators / Power Supply ● High Eff iciency "Green" Computer Systems ● Co nstant Current Regulators ● Portable Instrumentation ● SMPS Post-Regulator ● Adjustable Power Supplies ● Powe ring VGA & Sound Card 1. ADJ / GND 2. OUTPUT 3. INPUT * Heatsink surface conn ected to Pin 2. ORDERING INFORMATION Device Package LM1085R-X.X TO-263 3L D LM1085RS-X.X TO-252 3LD (X.X=VOUT= 1.5V, 1.8V, 2.5V, 3.3V, 5.0V, ADJ) DES CRIPTION The LM1085 series of positive adjustable and fixed regulators are designed to provide 3A.
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