3.0 AMP LOW DROPOUT
POSITIVE VOLTAGE REGULATORS
November 22, 1999
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
DESCRIPTION
The EZ1587 series of high performance positive
voltage regulators are designed for use in applications
requiring low dropout performance at full rated current.
Additionally, the EZ1587 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 EZ1587 series are three terminal
regulators with fixed and adjustable voltage options
available in popular packages.
APPLICATIONS
• Pentium® Processor supplies
• PowerPC™ supplies
• Other 1.3V to 5.7V microprocessor supplies
• Low voltage logic supplies
• Battery-powered circuitry
• Post regulator for switching supply
BLOCK DIAGRAM
EZ1587
FEATURES
• Low dropout performance,
•
•
•
•
•
•
•
•
1.3V max. for EZ1587
Full current rating over line and temperature
Fast transient response
±2% total output regulation over line, load
and temperature
Adjust pin current max. 90µA over temperature
Fixed/adjustable output voltage
Line regulation typically 0.005%
Load regulation typically 0.05%
TO-220 or TO-263 packages
ORDERING INFORMATION
DEVICE
EZ1587CT-X.X
EZ1587CM-X.X
PACKAGE
VOUT VOLTS
See Note (1)
TO-220
(2)
See Note (1)
TO-263
Notes:
(1) Where X.X denotes voltage options. Available
voltages are: 1.5V, 1.8V, 2.5V, 3.3V and 3.45V. 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).
ABSOLUTE MAXIMUM RATINGS
Parameter
Input Supply Voltage
Power Dissipation
Thermal Resistance
Junction to Case
TO-220
TO-263
Symbol
Maximum
Units
VIN
7
V
PD
Internally
Limited
W
θJC
3
3
°C/W
θJA
50
60
°C/W
Operating Junction
Temperature Range
TJ
0 to 125
°C
Storage
Temperature Range
TSTG
-65 to 150
°C
Lead Temperature
(Soldering) 10 Sec
PIN CONFIGURATIONS
TLEAD
260
°C
Thermal Resistance
Junction to Ambient
TO-220
TO-263
Pentium Processor is a trademark of Intel Corp. PowerPC is a trademark of IBM
© 1999 SEMTECH CORP.
1
652 MITCHELL ROAD NEWBURY PARK CA 91320
3.0 AMP LOW DROPOUT
POSITIVE VOLTAGE REGULATORS
EZ1587
November 22, 1999
TYPICAL APPLICATIONS
FIXED VOLTAGE REGULATOR
(1)(2)
ADJUSTABLE VOLTAGE REGULATOR
(1)(2)
RECOMMENDED CIRCUIT FOR THE INTEL
PENTIUM PROCESSOR® - P54C-VRE
EZ1587
Pentium Processor is a trademark of Intel Corp.
© 1999 SEMTECH CORP.
3
652 MITCHELL ROAD NEWBURY PARK CA 91320
