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Semtech Corporation |
3.0 AMP POSITIVE
VOLTAGE REGULATOR
EZ1085
EZ1085B
June 17, 1999
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
PACKAGE
VOUT VOLTS
APPLICATIONS
• Post regulators
• Processor I/O supplies
• Battery chargers
BLOCK DIAGRAM
EZ1085CM-X.X
EZ1085BCM
TO-263(2)
See Note (1)
1.30 to 5.7
EZ1085CT-X.X
EZ1085BCT
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).
PIN CONFIGURATIONS
© 1999 SEMTECH CORP.
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol Maximum
Input Supply Voltage
VIN
7
Power Dissipation
PD
Internally
Limited
Thermal Resistance
Junction to Case
TO-220
TO-263
θJC
3
3
Thermal Resistance
Junction to Ambient
TO-220
TO-263
θJA
50
60
Operating Junction
Temperature Range
TJ
0 to 125
Storage Temperature
Range
TSTG
-65 to 150
Lead Temperature
(Soldering) 10 Sec
TLEAD
260
Units
V
W
°C/W
°C/W
°C
°C
°C
1
652 MITCHELL ROAD NEWBURY PARK CA 91320
June 17, 1999
3.0 AMP POSITIVE
VOLTAGE REGULATOR
EZ1085
EZ1085B
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, Adj VIN = 2.75V to 7.0V and Adj IO = 10mA to 3.0A;
Fixed VIN = 4.75 to 7.0V and Fixed IO = 0 mA to 3.0A
Parameter
Output Voltage(1)
EZ1085-X.X
Reference Voltage (1)
EZ1085
Reference Voltage (1)
EZ1085B
Line Regulation(1)
Symbol
VO
VREF
VREF
REG(LINE)
Load Regulation(1)
REG(LOAD)
Dropout Voltage(2)
EZ1085, EZ1085-X.X
EZ1085B
Current Limit
Quiescent Current
Fixed Voltage Version
Temperature Coefficient
Adjust Pin Current
VD
ICL
IQ
TC
IADJ
Adjust Pin Current
Change
Temperature Stability
Minimum Load Current
Adj Voltage Version
RMS Output Noise(3)
Ripple Rejection Ratio(4)
∆IADJ
TS
IO
VN
RA
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.
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
1.20 1.45
3.0 4.5
A
5V O.T. 12 14 mA
O.T.
25°C
O.T.
0.005
55
%/°C
µA
90
O.T. 0.2 5 µA
5V
0.5A
O.T.
0.5
%
5V O.T. 5 10 mA
25°C
0.003
5V
3.0A 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.
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652 MITCHELL ROAD NEWBURY PARK CA 91320
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