1998 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5.0 AMP LOW DROPOUT
POSITIVE VOLTAGE REGULATORS
EZ1585B
April 7, 1998
1
FEATURES
=
Low dropout performance, 1.3V max.
=
Full current rating over line and temperature
=
Fast transient response
=
1.5% total output regulation over line, load and
temperature
=
Adjust pin current max. 100A over temperature
=
Adjustable output voltage
=
Line regulation typically 0.015%
=
Load regulation typically 0.05%
=
TO-220 package
DESCRIPTION
The EZ1585B is a high performance positive voltage
regulator designed for use in applications requiring low
dropout performance at full rated current. Additionally,
the EZ1585B 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 EZ1585B has tight tolerance on
reference voltage, 1% at 25C and 1.5% over line,
load and temperature. The EZ1585B is a three
terminal regulator with adjustable output voltage
available in the popular TO-220 package.
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
APPLICATIONS
=
Pentium
Processor supplies
Pentium Processor is a trademark of Intel Corp.
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Maximum
Units
Input Supply Voltage
V
IN
7
V
Power Dissipation
P
D
Internally
Limited
W
Thermal Resistance
Junction to Case
Control
Power
JC
0.7
3.0
C/W
Thermal Resistance
Junction to Ambient
JA
50
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
ORDERING INFORMATION
DEVICE
PACKAGE
V
OUT
VOLTS
EZ1585BCT
TO-220
1.30 to 5.7
BLOCK DIAGRAM
PIN CONFIGURATION
1998 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5.0 AMP LOW DROPOUT
POSITIVE VOLTAGE REGULATORS
EZ1585B
April 7, 1998
2
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, Adj I
O
= 10mA to 5.0A; 1.3V
=
(
V
IN
- V
OUT
)
=
2V
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
OUT
= 25F.
(5) Over Temp. (O.T.) = over specified operating junction temperature range.
(6) V
IN
= 4.75 to 5.25V.
Test Conditions
Test Limits
Parameter
Symbol
V
IN
I
O
T
J
(5)
Min
Typ
Max
Units
Reference Voltage
(1)
V
REF
25C
1.238
1.250
1.262
V
Adj Voltage Version
O.T.
1.231
1.250
1.269
Line Regulation
(1)
REG
(LINE)
Note 6
25C
0.015
0.2
%
Adj Voltage Version
10mA
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
O.T.
1.1
1.3
Current Limit
I
CL
O.T.
5.0
A
Temperature Coefficient
T
C
Note 6
0.005
%/C
Adjust Pin Current
I
ADJ
Note 6
25C
40
55
80
A
O.T.
20
100
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
Note 6
25C
0.003
%V
O
Ripple Rejection Ratio
(4)
R
A
5V
5.0A
O.T.
60
72
dB
1998 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
5.0 AMP LOW DROPOUT
POSITIVE VOLTAGE REGULATORS
EZ1585B
April 7, 1998
3
TYPICAL APPLICATIONS
ADJUSTABLE VOLTAGE REGULATOR
(1)(2)
Pentium Processor is a trademark of Intel Corp.
RECOMMENDED CIRCUIT FOR THE INTEL
PENTIUM PROCESSOR - P54C-VRE
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