DUAL INPUT
LOW DROPOUT REGULATOR
February 26, 1999
EZ1580/EZ1581
EZ1582/EZ1583
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The EZ158X family of high performance positive
voltage regulators are designed for use in applications
requiring very low dropout voltage at 7, 5, 3 and 1.5
amps. When supplying 2.5V on motherboards where
both 5V and 3.3V supplies are available, the superior
dropout characteristics of the EZ158X result in reduced
heat dissipation compared to regular LDOs, thus
allowing heat sink size reduction. Additionally, the
EZ158X provides excellent regulation over variations in
line, load and temperature. Remote sense operation
allows compensating for trace, connector and other
resistive losses.
Outstanding features include very low dropout
performance at rated current, fast transient response,
remote sense, internal current limiting, thermal
shutdown and safe operating area protection of the
output device. The EZ158X is a five terminal
adjustable voltage regulator available in the popular 5
pin TO-220 and TO-263 plastic packages.
ORDERING INFORMATION
DEVICE
EZ1580CT-X.X
EZ1581CT-X.X
EZ1582CT-X.X
EZ1583CT-X.X
EZ1580CM-X.X
EZ1581CM-X.X
EZ1582CM-X.X
EZ1583CM-X.X
TO-263,
5-pin
(2)
PACKAGE I
OUT
(A)
TO-220,
5-pin
7
5
3
1.5
7
5
3
1.5
See Note (1)
V
OUT
(V)
See Note (1)
Notes:
(1) Where -X.X denotes voltage options. Available
voltages are: 1.5V and 2.5V. Leave blank for ad-
justable version (1.3 to 5.7V).
(2) Add suffix ‘TR’ for tape and reel (TO-263).
FEATURES
•=
540mV dropout @ 7A in dual supply mode
•=
•=
•=
•=
(EZ1580)
Remote sense operation
Fast transient response
0.5% initial accuracy
5 Pin TO-220 and TO-263 packages
ABSOLUTE MAXIMUM RATINGS
Parameter
Input Voltage
V
POWER
V
CONTROL
Power
Dissipation
Thermal Resistance
Junction to Case
EZ1580/1 TO-220
EZ1580/1 TO-263
EZ1582/3 TO-220
EZ1582/3 TO-263
Thermal Resistance
Junction to Ambient
EZ158X TO-220
EZ158X TO-263
Operating Junction
Temperature Range
Storage Temperature
Range
Lead Temperature
(Soldering) 10 Sec.
Symbol
V
P
V
C
P
D
Maximum
7
13.2
Internally
Limited
Units
V
W
APPLICATIONS
•=
•=
•=
•=
•=
Microprocessor supplies
Split plane microprocessor supplies
Pentium® Processor P54C and P55C
PowerPC™ 603/604EV
AMD5
K
86™, AMD K6
θ
JC
2
2
3
3
°C/W
BLOCK DIAGRAM
θ
JA
T
J
50
60
0 to 125
°C/W
°C
T
STG
T
LEAD
-65 to 125
260
°C
°C
Pentium is a registered trademark of Intel Corporation.
PowerPC is a trademark of IBM.
AMD5
K
86 and K6 are trademarks of Advanced Micro Devices.
1
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
SEMTECH [ SEMTECH CORPORATION ]
