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부품번호 | EZ1581 기능 |
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기능 | DUAL INPUT LOW DROPOUT REGULATOR | ||
제조업체 | Semtech Corporation | ||
로고 | |||
전체 5 페이지수
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
DUAL INPUT
LOW DROPOUT REGULATOR
February 26, 1999
TYPICAL APPLICATIONS(1)(2)
Adjustable Output Parts(3)
3.3V POWER IN
5V CONTROL IN
C1
33uF
U1 EZ158XCX
1
SENSE
5 POWER
OUTPUT 3
4
CONTROL
ADJ
C2
10uF
2
VREF
R1
124
2.5V OUT
C3
68uF
R2
124
GROUND
Fixed Output Parts
VOUT
=
VREF
çæ1 +
è
R2
R1
ö
+
IADJ
• R2
GROUND
3.3V POWER IN
5V CONTROL IN
GROUND
C1
33uF
U1 EZ158XCX-2.5
1
SENSE
5 POWER
OUTPUT 3
4 CONTROL
GND
C2
10uF
2
2.5V OUT
C3
68uF
GROUND
EZ1580/EZ1581
EZ1582/EZ1583
2.5V POWER IN
3.3V CONTROL IN
GROUND
C1
47uF
U1 EZ158XCX-1.5
1
SENSE
5 POWER
OUTPUT 3
4 CONTROL
GND
C2
10uF
2
1.5V OUT
C3
100uF
GROUND
NOTES:
(1) Capacitor values are for reference only. Good quality, low ESR tantalum or aluminum electrolytic capacitors
should be used. Increasing the value of the output capacitor will improve the overall transient response.
(2) If the same voltage is input to both POWER and CONTROL, then the dropout voltage will become 1.3V maxi-
mum.
(3) A small (~0.033µF) capacitor can be used to bypass the ADJUST pin to improve transient response, if needed.
© 1999 SEMTECH CORP.
4
652 MITCHELL ROAD NEWBURY PARK CA 91320
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부품번호 | 상세설명 및 기능 | 제조사 |
EZ1580 | DUAL INPUT LOW DROPOUT REGULATOR | Semtech Corporation |
EZ1580CM | DUAL INPUT LOW DROPOUT REGULATOR | Semtech Corporation |
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