1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5.0 AMP POSITIVE
VOLTAGE REGULATOR
EZ1084
EZ1084B
June 7, 1999
1
DESCRIPTION
The EZ1084 series of high performance positive
voltage regulators are designed for use in applications
requiring low dropout performance at full rated current.
Additionally, the EZ1084 series provides excellent
regulation over variations in line, load and temperature.
Outstanding features include low dropout performance
at rated current, fast transient response, internal
current limiting and thermal shutdown protection of the
output device. The EZ1084 has both fixed and
adjustable voltage options, while the EZ1084B is
adjustable only for cost sensitive applications. These
devices are available in the popular TO-220 and TO-
263 packages.
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
APPLICATIONS
High current microprocessor supplies
Post regulators
PIN CONFIGURATIONS
FEATURES
Low dropout performance,
1.3V max. for EZ1084,
1.45V max. for EZ1084B
Full current rating over line and temperature
Fast transient response
2% total output regulation over line, load
and temperature (2.4% for EZ1084B)
Adjust pin current max 90A over temperature
Fixed/adjustable output voltage (EZ1084)
Line regulation typically 0.015%
Load regulation typically 0.05%
TO-220 and TO-263 packages
Parameter
Symbol
Maximum
Units
Input Supply Voltage
V
IN
7
V
Power Dissipation
P
D
Internally
Limited
W
Thermal Resistance
Junction to Case
TO-220
TO-263
JC
2.5
2.5
C/W
Thermal Resistance
Junction to Ambient
TO-220
TO-263
JA
50
60
C/W
Operating Junction
Temperature Range
T
J
0 to 125
C
Storage
Temperature Range
T
STG
-65 to 150
C
Lead Temperature
(Soldering) 10 Sec
T
LEAD
260
C
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
ORDERING INFORMATION
DEVICE
PACKAGE
V
OUT
VOLTS
EZ1084CM-X.X
EZ1084BCM
TO-263
(2)
See Note (1)
1.30 to 5.7
EZ1084CT-X.X
EZ1084BCT
TO-220
See Note (1)
1.30 to 5.7
Notes:
(1) Where X.X denotes voltage options. Available
voltages are: 1.5V, 2.5V and 3.3V. Leave blank for
adjustable version (1.3 to 5.7V). Contact factory for
additional voltage options.
(2) Add suffix `TR' for tape and reel (TO-263).
1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5.0 AMP POSITIVE
VOLTAGE REGULATOR
EZ1084
EZ1084B
June 7, 1999
2
ELECTRICAL CHARACTERISTICS
Test Conditions
Test Limits
Parameter
Symbol
V
IN
I
O
T
J
(5)
Min
Typ
Max
Units
Output Voltage
(1)
V
O
5V
0mA
25C
0.99lV
O
l
V
O
1.01lV
O
l
V
EZ1084-X.X
O.T.
0.98lV
O
l
V
O
1.02lV
O
l
Reference Voltage
(1)
V
REF
5V
10mA
25C
1.238
1.250
1.262
V
EZ1084
O.T.
1.225
1.250
1.275
Reference Voltage
(1)
V
REF
5V
10mA
25C
1.233
1.250
1.267
V
EZ1084B
O.T.
1.220
1.250
1.280
Line Regulation
(1)
REG
(LINE)
10mA
25C
0.015
0.2
%
O.T.
0.035
0.2
Load Regulation
(1)
REG
(LOAD)
5V
25C
0.05
0.3
%
O.T.
0.2
0.4
Dropout Voltage
(2)
V
D
25C
1
V
EZ1084, EZ1084-X.X
O.T.
1.10
1.30
EZ1084B
1.20
1.45
Current Limit
I
CL
O.T.
5.0
7.5
A
Quiescent Current
Fixed Voltage Version
I
Q
5V
O.T.
12
14
mA
Temperature Coefficient
T
C
O.T.
0.005
%/C
Adjust Pin Current
I
ADJ
25C
55
A
O.T.
90
Adjust Pin Current
Change
I
ADJ
O.T.
0.2
5
A
Temperature Stability
T
S
5V
0.5A
O.T.
0.5
%
Minimum Load Current
Adj Voltage Version
I
O
5V
O.T.
5
10
mA
RMS Output Noise
(3)
V
N
25C
0.003
%V
O
Ripple Rejection Ratio
(4)
R
A
5V
5.0A
O.T.
60
72
dB
Unless otherwise specified, Adj V
IN
= 2.75V to 7.0V and Adj I
O
= 10mA to 5.0A;
Fixed V
IN
= 4.75 to 7.0V and Fixed I
O
= 0 mA to 5.0A
NOTES:
(1) Low duty cycle pulse testing with Kelvin connections required.
(2)
V
OUT
,
V
REF
= 1%
(3)
Bandwidth of 10 Hz to 10 kHz.
(4) 120 Hz input ripple (C
ADJ
for ADJ = 25F).
(5) Over Temp. (O.T.) = over specified operating junction temperature range.
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