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Semtech Corporation |
5.0 AMP POSITIVE
VOLTAGE REGULATOR
EZ1084
EZ1084B
June 7, 1999
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
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.
APPLICATIONS
• High current microprocessor supplies
• Post regulators
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 90µA over temperature
• Fixed/adjustable output voltage (EZ1084)
• Line regulation typically 0.015%
• Load regulation typically 0.05%
• TO-220 and TO-263 packages
ORDERING INFORMATION
DEVICE
PACKAGE
EZ1084CM-X.X
EZ1084BCM
EZ1084CT-X.X
EZ1084BCT
TO-263(2)
TO-220
VOUT VOLTS
See Note (1)
1.30 to 5.7
See Note (1)
1.30 to 5.7
BLOCK DIAGRAM
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).
PIN CONFIGURATIONS
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol Maximum Units
Input Supply Voltage
VIN
7V
Power Dissipation
PD
Internally
Limited
W
Thermal Resistance
Junction to Case
TO-220
TO-263
θJC
2.5 °C/W
2.5
Thermal Resistance
Junction to Ambient
TO-220
TO-263
Operating Junction
Temperature Range
Storage
Temperature Range
Lead Temperature
(Soldering) 10 Sec
θJA
TJ
TSTG
TLEAD
50 °C/W
60
0 to 125 °C
-65 to 150 °C
260 °C
© 1999 SEMTECH CORP.
1
652 MITCHELL ROAD NEWBURY PARK CA 91320
5.0 AMP POSITIVE
VOLTAGE REGULATOR
EZ1084
EZ1084B
June 7, 1999
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, Adj VIN = 2.75V to 7.0V and Adj IO = 10mA to 5.0A;
Fixed VIN = 4.75 to 7.0V and Fixed IO = 0 mA to 5.0A
Parameter
Output Voltage(1)
EZ1084-X.X
Reference Voltage (1)
EZ1084
Reference Voltage (1)
EZ1084B
Line Regulation(1)
Load Regulation(1)
Dropout Voltage(2)
EZ1084, EZ1084-X.X
Symbol
VO
VREF
VREF
REG(LINE)
REG(LOAD)
VD
Test Conditions
VIN IO
5V 0mA
5V 10mA
5V 10mA
10mA
5V
TJ(5)
25°C
O.T.
25°C
O.T.
25°C
O.T.
25°C
O.T.
25°C
O.T.
25°C
O.T.
Test Limits
Min Typ Max Units
0.99lVOl
0.98lVOl
1.238
VO
VO
1.250
1.01lVOl
1.02lVOl
1.262
V
V
1.225
1.250 1.275
1.233
1.250 1.267 V
1.220
1.250 1.280
0.015 0.2 %
0.035
0.2
0.05 0.3 %
0.2 0.4
1V
1.10 1.30
EZ1084B
1.20 1.45
Current Limit
ICL
Quiescent Current
Fixed Voltage Version
IQ
5V
O.T.
5.0
O.T.
7.5 A
12 14 mA
Temperature Coefficient
Adjust Pin Current
TC
IADJ
O.T.
25°C
O.T.
0.005
55
%/°C
µA
90
Adjust Pin Current
Change
∆IADJ
O.T. 0.2 5 µA
Temperature Stability
TS
5V
0.5A
O.T.
0.5
%
Minimum Load Current
Adj Voltage Version
IO
5V
O.T. 5 10 mA
RMS Output Noise(3)
VN
25°C
0.003
Ripple Rejection Ratio(4)
RA
5V
5.0A O.T. 60
72
%VO
dB
NOTES:
(1) Low duty cycle pulse testing with Kelvin connections required.
(2) ∆VOUT, ∆VREF = 1%
(3) Bandwidth of 10 Hz to 10 kHz.
(4) 120 Hz input ripple (CADJ for ADJ = 25µF).
(5) Over Temp. (O.T.) = over specified operating junction temperature range.
© 1999 SEMTECH CORP.
2
652 MITCHELL ROAD NEWBURY PARK CA 91320
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