Voltage Regulator. LM1085 Datasheet

LM1085 Datasheet PDF


Part Number

LM1085

Description

3A Low Dropout Positive Voltage Regulator

Manufacture

CYStech Electronics

Total Page 9 Pages
Datasheet
Download LM1085 Datasheet


LM1085
Spec. No. : C540J3
CYStech Electronics Corp. Issued Date : 2003.06.25
Revised Date :2013.09.11
Page No. : 1/9
3A Low Dropout Positive Voltage Regulator
LM1085-XXXJ3
TO-252AB
TO-252AA
Features
Dropout Voltage 1.4V at 3A Output Current.
Fast Transient Response.
Extremely Tight Line and Load Regulation.
Built-in Thermal Shutdown Protection.
Adjustable Output Voltage or Fixed 1.5V, 1.8V, 2.5V, 3.3V, 5.0V.
Output Current Limiting.
Adj/G O I
Adj/G O I
Description
The LM1085-XXXJ3 is a low dropout three terminal regulator with 3A output current capability. The output voltage is
adjustable with the use of a resistor divider or fixed 1.5V, 1.8V, 2.5V, 3.3V and 5.0V. Dropout voltage is guaranteed to be at
maximum of 1.4V with the maximum output current. Its low dropout voltage and fast transient response make it ideal for
low voltage microprocessor applications. Current limit and thermal protection provide protection against any overload
condition that would create excessive junction temperatures.
Applications
Mother Board I/O Power Supplies.
Microprocessor Power Supplies.
High Current Regulator.
Post Regulator for Switching Supply.
Ordering Information
Device
LM1085-XXXJ3-0-T3-G
Package
TO-252
(Pb-free lead plating and halogen-free package)
Shipping
2500 pcs / tape & reel
Environment friendly grade : S for RoHS compliant products, G for RoHS compliant and
green compound products
Packing spec, T3 : 2500 pcs / tape & reel, 13” reel
Product rank, zero for no rank products
Product name
LM1085-XXXJ3
CYStek Product Specification

LM1085
Spec. No. : C540J3
CYStech Electronics Corp. Issued Date : 2003.06.25
Revised Date :2013.09.11
Page No. : 2/9
Typical Application Circuit
Vin=5V
C1
101μ0μF F
LM1085
ADJ
VREF
R1
125Ω
1%
R2
205Ω
1%
Vout=3.3V
C2
22μF
Vin=5V
C1
10μF
Adjustable Voltage Regulator
LM1085-3.3
GND
Vout=3.3V
C2
22μF
VREF=VOUT-VADJ=1.25V(typ)
VOUT=VREF(1+R1/R2)+IADJ ×R2
IADJ=55μA(typ.)
(1)C1 needed if device is far
away from filter capacitors.
(2)C2 minimum value required
for stability.
Fixed Voltage Regulator
Absolute Maximum Ratings
Symbol
Vin
PD
TSTG
TOPR
TLEAD
Parameter
DC supply voltage
Power Dissipation
Storage Temperature Range
Operation Junction Temperature Range
Lead Temperature(Soldering 10 seconds)
Ratings
15
Internally Limited
-65 ~ +150
-40 ~ +125
300
Unit
V
W
LM1085-XXXJ3
CYStek Product Specification





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