DUAL INPUT
LOW DROPOUT REGULATOR
EZ1580/EZ1581
EZ1582/EZ1583
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
February 26, 1999
DESCRIPTION
ORDERING INFORMATION
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.
DEVICE
PACKAGE IOUT (A)
VOUT (V)
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-220,
5-pin
7
5
See Note (1)
3
1.5
7
TO-263,
5-pin(2)
See Note (1)
5
3
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.
1.5
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
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol Maximum Units
•= 540mV dropout @ 7A in dual supply mode
(EZ1580)
Input Voltage
VPOWER
VCONTROL
•= Remote sense operation
•= Fast transient response
•= 0.5% initial accuracy
VP
VC
7
13.2
V
Power
Dissipation
PD
Internally
Limited
W
•= 5 Pin TO-220 and TO-263 packages
APPLICATIONS
Thermal Resistance
Junction to Case
EZ1580/1 TO-220
EZ1580/1 TO-263
EZ1582/3 TO-220
EZ1582/3 TO-263
•= Microprocessor supplies
2
2
3
3
°C/W
θJC
•= Split plane microprocessor supplies
•= Pentium® Processor P54C and P55C
•= PowerPC™ 603/604EV
•= AMD5K86™, AMD K6
Thermal Resistance
Junction to Ambient
EZ158X TO-220
EZ158X TO-263
BLOCK DIAGRAM
50
60
°C/W
°C
θJA
Operating Junction
Temperature Range
TJ
0 to 125
Storage Temperature
Range
TSTG
-65 to 125
260
°C
°C
Lead Temperature
(Soldering) 10 Sec.
TLEAD
Pentium is a registered trademark of Intel Corporation.
PowerPC is a trademark of IBM.
AMD5K86 and K6 are trademarks of Advanced Micro Devices.
1
© 1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
SEMTECH [ SEMTECH CORPORATION ]
