1998 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
6.0 AMP LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
EZ1585D
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 EZ1585D is a high performance positive voltage
regulator designed for use in applications requiring low
dropout performance at full rated current. Additionally,
the EZ1585D 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 EZ1585D has tight tolerance on
reference voltage, 1% at 25C and 1.5% over line,
load and temperature, as well as a 6.0A maximum
current. The EZ1585D 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
PIN CONFIGURATION
Pentium Processor is a trademark of Intel Corp.
ORDERING INFORMATION
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
DEVICE
PACKAGE
V
OUT
VOLTS
EZ1585DCT
TO-220
1.30 to 5.7
BLOCK DIAGRAM
1998 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
6.0 AMP LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
EZ1585D
April 7, 1998
2
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, Adj I
O
= 10mA to 6.0A; 1.3V
=
(
V
IN
- V
OUT
)
=
2.6V
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, (V
IN
-V
OUT
) = 1.5V.
(5) Over Temp. (O.T.) = over specified operating junction temperature range.
(6) V
IN
= 4.75 to 5.25V.
(7) 1.8V
(V
IN
- V
OUT
)
2.6V.
(8) 1.3V
(V
IN
- V
OUT
)
1.8V.
Test Conditions
Test Limits
Parameter
Symbol
V
IN
I
O
T
J
(5)
Min
Typ
Max
Units
Reference Voltage
(1)
V
REF
Note 7
10mA
I
O
6A 25C
1.238
1.262
Note 8
10mA
I
O
5A
1.250
V
Adj Voltage Version
Note 7
10mA
I
O
6A O.T.
1.231
1.269
Note 8
10mA
I
O
5A
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
5A
O.T.
1.1
1.3
6A
1.8
Current Limit
I
CL
Note 7
O.T.
6.0
A
Note 8
5.0
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
6.0 AMP LOW DROPOUT
POSITIVE VOLTAGE REGULATOR
EZ1585D
April 7, 1998
3
TYPICAL APPLICATIONS
ADJUSTABLE VOLTAGE REGULATOR
(1)(2)
RECOMMENDED CIRCUIT FOR THE
INTEL PENTIUM PROCESSOR - P54C-VRE
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