3.0 AMP POSITIVE
VOLTAGE REGULATOR
June 17, 1999
EZ1085
EZ1085B
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The EZ1085 series of high performance positive
voltage regulators are designed for use in applications
requiring low dropout performance at full rated current.
Additionally, the EZ1085 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 EZ1085 has both fixed and
adjustable voltage options, while the EZ1085B is
adjustable only for cost sensitive applications. These
devices are available in the popular TO-220 and TO-
263 packages.
FEATURES
•
Low dropout performance,
•
•
•
•
•
•
•
•
1.3V max. for EZ1085,
1.45V max. for EZ1085B
Full current rating over line and temperature
Fast transient response
±2% total output regulation over line, load
and temperature (±2.4% for EZ1085B)
Adjust pin current max 90µA over temperature
Fixed/adjustable output voltage (EZ1085)
Line regulation typically 0.015%
Load regulation typically 0.05%
TO-220 and TO-263 packages
ORDERING INFORMATION
DEVICE
EZ1085CM-X.X
EZ1085BCM
EZ1085CT-X.X
EZ1085BCT
PACKAGE
TO-263
(2)
V
OUT
VOLTS
See Note (1)
1.30 to 5.7
See Note (1)
1.30 to 5.7
APPLICATIONS
•
Post regulators
•
Processor I/O supplies
•
Battery chargers
BLOCK DIAGRAM
TO-220
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).
ABSOLUTE MAXIMUM RATINGS
Parameter
Input Supply Voltage
Power Dissipation
Thermal Resistance
Junction to Case
TO-220
TO-263
Thermal Resistance
Junction to Ambient
TO-220
TO-263
Operating Junction
Temperature Range
Storage Temperature
Range
Lead Temperature
(Soldering) 10 Sec
Symbol Maximum
V
IN
P
D
7
Internally
Limited
Units
V
W
PIN CONFIGURATIONS
θ
JC
3
3
°C/W
θ
JA
T
J
T
STG
T
LEAD
50
60
0 to 125
-65 to 150
260
°C/W
°C
°C
°C
1
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
3.0 AMP POSITIVE
VOLTAGE REGULATOR
June 17, 1999
EZ1085
EZ1085B
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, Adj V
IN
= 2.75V to 7.0V and Adj I
O
= 10mA to 3.0A;
Fixed V
IN
= 4.75 to 7.0V and Fixed I
O
= 0 mA to 3.0A
Test Conditions
Parameter
Output Voltage
EZ1085-X.X
Reference Voltage
EZ1085
Reference Voltage
EZ1085B
Line Regulation
(1)
(1)
(1)
(1)
Test Limits
T
J
(5)
Symbol
V
O
V
REF
V
REF
REG
(LINE)
REG
(LOAD)
V
D
V
IN
5V
I
O
0mA
Min
0.99lV
O
l
0.98lV
O
l
1.238
1.225
1.233
1.220
Typ
V
O
V
O
1.250
1.250
1.250
1.250
0.015
0.035
0.05
0.2
1
1.10
1.20
Max
1.01lV
O
l
1.02lV
O
l
1.262
1.275
1.267
1.280
0.2
0.2
0.3
0.4
Units
V
25°C
O.T.
5V
10mA
25°C
O.T.
V
5V
10mA
25°C
O.T.
V
10mA
25°C
O.T.
%
Load Regulation
(1)
5V
25°C
O.T.
%
Dropout Voltage
(2)
25°C
O.T.
V
1.30
1.45
A
14
mA
%/°C
µA
90
EZ1085, EZ1085-X.X
EZ1085B
Current Limit
Quiescent Current
Fixed Voltage Version
Temperature Coefficient
Adjust Pin Current
I
CL
I
Q
T
C
I
ADJ
5V
O.T.
O.T.
O.T.
25°C
O.T.
3.0
4.5
12
0.005
55
Adjust Pin Current
Change
Temperature Stability
Minimum Load Current
Adj Voltage Version
RMS Output Noise
(3)
(4)
∆I
ADJ
T
S
I
O
V
N
R
A
5V
3.0A
5V
5V
0.5A
O.T.
O.T.
O.T.
25°C
O.T.
60
0.2
0.5
5
0.003
72
5
µA
%
10
mA
%V
O
dB
Ripple Rejection Ratio
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 = 25µF).
(5) Over Temp. (O.T.) = over specified operating junction temperature range.
2
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
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