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DUAL INPUT LOW DROPOUT REGULATOR



Semtech Corporation 로고
Semtech Corporation
EZ1581CT 데이터시트, 핀배열, 회로
DUAL INPUT
LOW DROPOUT REGULATOR
EZ1580/EZ1581
EZ1582/EZ1583
February 26, 1999
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
PACKAGE IOUT (A)
VOUT (V)
EZ1580CT-X.X TO-220,
7 See Note (1)
EZ1581CT-X.X 5-pin
5
EZ1582CT-X.X
3
EZ1583CT-X.X
1.5
EZ1580CM-X.X TO-263,
EZ1581CM-X.X 5-pin(2)
7 See Note (1)
5
EZ1582CM-X.X
3
EZ1583CM-X.X
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
= 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
APPLICATIONS
= Microprocessor supplies
= Split plane microprocessor supplies
= Pentium® Processor P54C and P55C
= PowerPC™ 603/604EV
= AMD5K86™, AMD K6
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol Maximum
Input Voltage
VPOWER
VCONTROL
Power
Dissipation
VP 7
VC 13.2
PD Internally
Limited
Thermal Resistance
Junction to Case
EZ1580/1 TO-220
EZ1580/1 TO-263
EZ1582/3 TO-220
EZ1582/3 TO-263
θJC
2
2
3
3
Thermal Resistance
Junction to Ambient
EZ158X TO-220
EZ158X TO-263
θJA
50
60
Operating Junction
TJ 0 to 125
Temperature Range
Storage Temperature
Range
Lead Temperature
(Soldering) 10 Sec.
TSTG
TLEAD
-65 to 125
260
Units
V
W
°C/W
°C/W
°C
°C
°C
© 1999 SEMTECH CORP.
Pentium is a registered trademark of Intel Corporation.
PowerPC is a trademark of IBM.
AMD5K86 and K6 are trademarks of Advanced Micro Devices.
1
652 MITCHELL ROAD NEWBURY PARK CA 91320


EZ1581CT 데이터시트, 핀배열, 회로
February 26, 1999
PIN CONFIGURATION
DUAL INPUT
LOW DROPOUT REGULATOR
EZ1580/EZ1581
EZ1582/EZ1583
PIN DESCRIPTION
Pin Pin Name
Pin Function
1 SENSE This pin is the positive side of the reference voltage for this device. With this pin it is possible to
Kelvin sense the output voltage at the load.
2 ADJUST / This pin is the negative side of the reference voltage for the device. Transient response can be
improved by adding a small bypass capacitor from the adjust pin to ground.
GROUND This pin is the bottom end of the internal resistor feedback chain for fixed output voltage parts,
and should be connected to ground.
3 OUTPUT This is the power output of the device, and is electrically connected to the TAB.
4 CONTROL This pin is the supply pin for the control circuitry for the device. The current flow into this pin will
be approximately 1% of the output current. For the device to regulate, the voltage at this pin must
be between 1.0V and 1.3V greater than the output voltage (see dropout specifications).
5 POWER This is the collector input to the power device of the EZ158X. The output load current is supplied
through this pin. For the device to regulate, the voltage on this pin must be between 0.1V and
0.7V greater than the output voltage, depending upon load current (see dropout specifications).
© 1999 SEMTECH CORP.
2
652 MITCHELL ROAD NEWBURY PARK CA 91320




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