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Электронный компонент: EZ1580CM

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1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
DUAL INPUT
LOW DROPOUT REGULATOR
EZ1580/EZ1581
EZ1582/EZ1583
February 26, 1999
1
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.
DEVICE
PACKAGE I
OUT
(A)
V
OUT
(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,
7
See Note (1)
EZ1581CM-X.X
5-pin
(2)
5
EZ1582CM-X.X
3
EZ1583CM-X.X
1.5
ORDERING INFORMATION
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
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.
APPLICATIONS
=
Microprocessor supplies
=
Split plane microprocessor supplies
=
Pentium Processor P54C and P55C
=
PowerPCTM 603/604EV
=
AMD5
K
86TM, AMD K6
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Maximum
Units
Input Voltage
V
POWER
V
CONTROL
V
P
V
C
7
13.2
V
Power
Dissipation
P
D
Internally
Limited
W
Thermal Resistance
Junction to Case
EZ1580/1 TO-220
EZ1580/1 TO-263
EZ1582/3 TO-220
EZ1582/3 TO-263
JC
2
2
3
3
C/W
Thermal Resistance
Junction to Ambient
EZ158X TO-220
EZ158X TO-263
JA
50
60
C/W
Operating Junction
Temperature Range
T
J
0 to 125
C
Storage Temperature
Range
T
STG
-65 to 125
C
Lead Temperature
(Soldering) 10 Sec.
T
LEAD
260
C
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).
BLOCK DIAGRAM
TEL:805-498-2111 FAX:805-498-3804 WEB:http://www.semtech.com
1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
DUAL INPUT
LOW DROPOUT REGULATOR
EZ1580/EZ1581
EZ1582/EZ1583
February 26, 1999
2
PIN CONFIGURATION
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 /
GROUND
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.
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.
652 MITCHELL ROAD NEWBURY PARK CA 91320
DUAL INPUT
LOW DROPOUT REGULATOR
EZ1580/EZ1581
EZ1582/EZ1583
February 26, 1999
3
(1) Unless otherwise specified, V
OUT
= V
SENSE
, V
ADJ
= 0V.
(2) Required to maintain regulation. Voltage set resistors R1, R2 are usually utilized for minimum load current.
(3) Current used to drive the output section; minimum value equals the standby current of the device.
(4) V
C
= V
P
= 3.75V Avg; V
RIPPLE
= 1V
PK-PK
.
(5) 30ms.
(6) Over Temp (O.T.) = over specified operating junction temperature range.
(7) Minimum input/output voltage required to maintain 1% regulation.
ELECTRICAL CHARACTERISTICS
Test Conditions
(1)
Test Limits
Parameter
Symbol
V
CNTL
Volts
V
PWR
Volts
Amps
T
J
(6)
Min
Typ
Max
Units
Reference Voltage
V
REF
2.75
2.00
0.01
25C
1.243
1.250
1.257
EZ1583
EZ1582
EZ1581
EZ1580
2.7 - 12
2.05 - 5.5
0.01 - 1.5
0.01 - 3.0
0.01 - 5.0
0.01 - 7.0
O.T.
1.237
1.250
1.263
V
Line Regulation
REG
(LINE)
2.5 - 12
1.75 - 5.5
0.01
O.T.
1.0
3.0
mV
Load Regulation
EZ1583
EZ1582
EZ1581
EZ1580
REG
(LOAD)
2.75
2.1
0.01 - 1.5
0.01 - 3.0
0.01 - 5.0
0.01 - 7.0
O.T.
1.0
5.0
mV
Minimum Load Current
(2)
I
O
5
3.3
O.T.
5.0
10
mA
Control Pin Current
(3)
EZ1583
EZ1582
EZ1581
EZ1580
I
C
2.75
2.05
1.5
3.0
5.0
7.0
O.T.
6.0
30
33
60
120
mA
Adjust Pin Current
I
ADJ
2.75
2.05
0.01
O.T.
50
120
A
Current Limit
EZ1583
EZ1582
EZ1581
EZ1580
I
CL
2.75
2.05
O.T.
1.6
3.1
5.1
7.1
A
Ripple Rejection
(4)
EZ1583
EZ1582
EZ1581
EZ1580
R
A
3.75
3.75
0.75
1.5
2.5
3.5
25C
60
80
dB
Thermal Regulation
(5)
REG
(THERMAL)
0.002
0.02
%/W
Dropout Voltage
(7)
Minimum V
CNTL
EZ1583
EZ1582
EZ1581
EZ1580
V
C
-V
O
2.05
1.5
3.0
5.0
7.0
O.T.
1.00
1.05
1.10
1.15
1.15
1.18
1.25
1.30
V
Dropout Voltage
(7)
Minimum V
POWER
EZ1583
1.5
25C
O.T.
0.40
0.50
0.50
0.60
EZ1582
V
P
-V
O
2.75
3.0
25C
O.T.
0.40
0.50
0.50
0.60
V
EZ1581
5.0
25C
O.T.
0.40
0.50
0.50
0.60
EZ1580
7.0
25C
O.T.
0.54
0.70
0.62
0.80
NOTES
1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
DUAL INPUT
LOW DROPOUT REGULATOR
EZ1580/EZ1581
EZ1582/EZ1583
February 26, 1999
4
TYPICAL APPLICATIONS
(1)(2)
GROUND
GROUND
3.3V POWER IN
2.5V OUT
5V CONTROL IN
C2
10uF
U1
EZ158XCX-2.5
4
3
2
1
5
CONTROL
OUTPUT
GND
SENSE
POWER
C3
68uF
C1
33uF
GROUND
1.5V OUT
3.3V CONTROL IN
2.5V POWER IN
GROUND
C2
10uF
C3
100uF
C1
47uF
U1
EZ158XCX-1.5
4
3
2
1
5
CONTROL
OUTPUT
GND
SENSE
POWER
2.5V OUT
3.3V POWER IN
5V CONTROL IN
GROUND
GROUND
C2
10uF
C1
33uF
C3
68uF
R1
124
R2
124
U1
EZ158XCX
4
3
2
1
5
CONTROL
OUTPUT
ADJ
SENSE
POWER
VREF
2
R
I
1
R
2
R
1
V
V
ADJ
REF
OUT
+
+
=
Adjustable Output Parts
(3)
Fixed Output Parts
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 (~0.033F) capacitor can be used to bypass the ADJUST pin to improve transient response, if needed.
1999 SEMTECH CORP.
652 MITCHELL ROAD NEWBURY PARK CA 91320
DUAL INPUT
LOW DROPOUT REGULATOR
EZ1580/EZ1581
EZ1582/EZ1583
February 26, 1999
5
DEVICE OUTLINE - TO-220, 5 PIN
APPLICATION INFORMATION
The EZ158X is a low dropout regulator designed to
power the next generation of low voltage, split voltage
plane processors, such as the Pentium Processor
P55C, the IBM PowerPCTM 603EV and 604EV and the
AMD5
K
86TM and K6 Processors.
The dropout voltage is minimized by utilizing a
separate input voltage, V
CONTROL
, which should exceed
V
OUT
by at least 1.3V. The 2.5V power for the load
(microprocessor core) can be derived from a 3.3V
system supply. Since the efficiency of a linear regulator
is the ratio of the output to the input voltage, heat
dissipation is reduced by using a 3.3 input, thereby
lowering heatsink and cooling fan costs. For a load of
7A at 2.5V, the regulator would dissipate 17.5W when
converting from 5V, but only 5.6W from a 3.3V input.
Remote Kelvin sensing of the output voltage can be
achieved by connecting the sense pin to the output at
the load. Remote sensing will reduce errors
associated with resistive trace losses between
regulator and processor.
DEVICE OUTLINE - TO-263, 5 PIN
MINIMUM LAND PATTERN - TO-263, 5 PIN