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LX8584-00CP

P1-P3P4-P6P7-P9
LX8584x-xx
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright © 1997
Rev. 1.3, 2005-11-11
WWW.Microsemi .COM
7A Low Dropout Positive Regualtors
TM
®
DESCRIPTION
The LX8584/84A/84B series ICs
are low dropout three-terminal
positive regulators with a nominal 7A
output current. This product family is
ideally suited for Pentium® Processor
and Power PCTM applications
requiring fast transient response. The
LX8584A is guaranteed to have <
1.2V at 7A and the LX8584/84B <
1.4V at 7A dropout voltage, making
them ideal to provide well regulated
outputs of 2.5V to 3.6V using a 5V
input supply. In addition, the
LX8584B also offers ±1% maximum
voltage reference accuracy over
temperature. Fixed versions are also
available and are specified in the
Available Options table below.
Current limit is trimmed above 7.1A
to ensure adequate output current and
controlled short-circuit current. On-chip
thermal limiting provides protection
against any combination of overload
that would create excessive junction
temperatures. The LX8584/84A series
products are available in both the
through-hole versions of the industry
standard 3-pin TO-220 and TO-247
power packages. The LX1431
Programmable Reference utilzed in
conjunction with the LX8584 7A LDO
products offer precision output voltage
(see application below) and are ideal for
use in VRE applications.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
Thick traces represent high current traces which must be low resistance /
low inductance in order to achieve good transient response.
µP
Load
100µF x 6
10V
AVX TYPE
TPS
1µF x 10
SMD
1k
0.1%
2.84kΩ
0.1%
COL
V
+
V
+
V
+
SGND FGND
REF
LX1431
V
IN
V
OUT
ADJ
1kΩ
1kΩ
0.01µF
3x
330µF, 6.3V
Low ESR
Oscon Type
from Sanyo
23
1
65
8
1
3
0.1µF
50V
220µF
10V
Low ESR
from
Sanyo
5V
PLACE IN µP SOCKET CAVITY
LX8584A
V
O
7A
(See Table Below)
2
250pF
21k
1%
JP1
THE APPLICATION OF THE LX8584A & LX1431 IN A
75 & 166 MHZ P54C PROCESSORS USING 3.3V CACHE
V
OUT
JP1 TYPICAL APPLICATION
3.50 Short 120/166MHz, VRE, 3.3V Cache
3.38 Open 75/90/100/133MHz, STND, 3.3V Cache
KEY FEATURES
Three Terminal Adjustable or
Fixed Output
Guaranteed 1% Voltage
Accuracy over Temperature
(LX8584B)
Guaranteed < 1.2V Headroom
at 7A (LX8584A)
Guaranteed < 1.4V Headroom
at 7A (LX8584/84B)
Output Current of 7A
Fast Transient Response
1% Voltage Reference Initial
Accuracy
Output Short Circuit Protection
Built-in Thermal Shutdown
Evaluation Board Available:
Request LXE9001 Evaluation
Kit
APPLICATIONS
Pentium™ Processor Supplies
Power PC™ Supplies
Microprocessor Supplies
Low Voltage Logic Supplies
Post Regulator for Switching
Supply
Output Current - (A)
1.0
0 1.75 3.5 5.25
0.5
1.5
7
T
J
= 125 °C
LX8584/84A
LX8584
LX8584A
DROPOUT V OLTAGE VS.
O
UTPUT C URRENT
Input Output Differential V
PACKAGE ORDER INFO AVAILABLE OPTIONS
P
Plastic TO-220
3 pin
T
J
(°C)
Dropout Voltage
RoHS Compliant
Transition DC: 0543
LX8584-xxCP
1.4V
LX8584B-xxCP
0 to 125
1.2V LX8584A-xxCP
Part #
Output
Voltage
LX8584/A/B-00 Adjustable
LX8584/A/B/-33 3.3V
Other voltage options may be available –
please contact factory for details.
Note: xx refers to output voltage, please see table to right. Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8584-xxCP-TR)
L
L
X
X
8
8
5
5
8
8
4
4
X
X
LX8584x-xx
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
Copyright © 1997
Rev. 1.3, 2005-11-11
WWW.Microsemi .COM
7A Low Dropout Positive Regualtors
TM
®
ABSOLUTE MAXIMUM RATINGS
Power Dissipation ....................................................................................Internally Limited
Input Voltage .................................................................................................................10V
Input to Output Voltage Differential..............................................................................10V
Maximum Output Current................................................................................................8A
Maximum Operating Junction Temperature .................................................................150°
Storage Temperature Range.........................................................................-65°C to 150°C
Package Peak Temp. for Solder Reflow (40 seconds maximum exposure) ... 260°C (+0 -5)
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to
Ground. Currents are positive into, negative out of specified terminal
.
THERMAL DATA
P
Plastic TO-220 3-Pin
THERMAL RESISTANCE-JUNCTION TO TAB, θ
JT
2.7°C/W
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ
JA
60°C/W
Junction Temperature Calculation: T
J
= T
A
+ (P
D
x θ
JA
).
The θ
JA
numbers are guidelines for the thermal performance of the device/pc-board system. All of the
above assume no ambient airflow.
PACKAGE PIN OUT
1
2
3
TAB is GND
V
OUT
V
IN
ADJ/GND*
P PACKAGE
(Top View)
RoHS 100% Matte Tin Lead Finish
P
P
A
A
C
C
K
K
A
A
G
G
E
E
D
D
A
A
T
T
A
A
LX8584x-xx
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
Copyright © 1997
Rev. 1.3, 2005-11-11
WWW.Microsemi .COM
7A Low Dropout Positive Regualtors
TM
®
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature for the LX8585-xxC / 84A-xxC /
84B-xxC with 0°C ≤ T
A
≤ 125°C; VIN – VOUT = 3V; IOUT = 7A. Low duty cycle pulse testing techniques are used which maintains
junction and case temperatures equal to the ambient temperature.
LX8584x-xx
Parameter Symbol Test Conditions
Min Typ Max
Units
`
LX8584-00 / 84A-00 / 84B-00 (ADJUSTABLE)
I
OUT
= 10mA, T
A
= 25°C 1.238 1.25 1.263
LX8584/84A-00
10mA <
I
OUT
< 7A, 1.5V < (V
IN
- V
OUT
),
V
IN
< 7V, P < P
MAX
1.225 1.250 1.275
I
OUT
= 10mA, T
A
=25°C 1.240 1.250 1.260
Reference
Voltage
LX8584B-00
V
REF
10mA < I
OUT
< 7A, 1.5V < (V
IN
– V
OUT
),
V
IN
< 7V, P < P
MAX
1.238 1.250 1.263
V
Line Regulations (Note 2) ∆V
REF
(V
IN
) I
OUT
= 10mA, 1.5V < (V
IN
– V
OUT
), V
IN
< 7V 0.035 0.20 %
Load Regulation (Note 2) ∆V
REF
(I
OUT
) V
IN
– V
OUT
= 3V, 10mA < I
OUT
< 7A 0.1 0.5 %
Thermal Regulation ∆V
OUT
(Pwr) T
A
= 25°C, 20ms pulse 0.01 0.02 % / W
Ripple Rejection (Note 3)
V
OUT
= 3.3V, f = 120Hz, C
OUT
= 100µF Tantalum,
V
IN
= 5V, C
ADJ
= 10µF, I
OUT
= 7A
65 83 dB
Adjust Pin Current I
ADJ
55 100 µA
Adjust Pin Current Change ∆I
ADJ
10mA < I
OUT
< 7A, 1.5V < (V
IN
– V
OUT
),
V
IN
< 7V
0.2 5 µA
LX8584A ∆V ∆V
REF
= 1%, I
OUT
= 7A 1.1 1.2 V
LX8584/84B ∆V
REF
= 1%, I
OUT
= 7A 1.2 1.4 V
Dropout Voltage
LX8584/84B ∆V
REF
= 1%, I
OUT
= 6A 1.1 1.3 V
Minimum Load Current I
OUT(MIN)
V
IN
< 7V 2 10 mA
Maximum Output Current I
OUT(MAX)
1.4V < (V
IN
– V
OUT
), V
IN
< 7V 7 8 A
Temperature Stability ∆V
OUT
(T) 0.25 %
Long Term Stability ∆V
OUT
(t) T
A
= 125°C, 1000hs 0.3 1 %
RMS Output Noise (% of V
OUT
) V
OUT(RMS)
T
A
= 25°C, 10Hz < f < 10kHz 0.003 %
`
LX8584-33 / 84A-33 / 84B-33 (3.3V Fixed
V
IN
= 5V, I
OUT
= 0mA, T
A
= 25°C 3.267 3.30 3.333
LX8584B-33
4.75V < V
IN
< 10V, 0mA < I
OUT
< 7A,
P <
P
MAX
3.234 3.30 3.366
V
IN
= 5V, I
OUT
= 0mA, T
A
= 25°C 3.274 3.30 3.326
Output
Voltage
LX8584/84A-33
V
OUT
4.75 <
V
IN
< 10V, 0mA < I
OUT
< 7A, P < P
MAX
3.267 3.30 3.333
V
∆V
OUT
4.75V < V
IN
< 7V 1 6 mV
Line Regulation (Note 2) (V
IN
)
4.75V <
V
IN
< 10V 2 10 mV
Load Regulation (Note 2) ∆V
OUT
(I
OUT
) V
IN
= 5V, 0mA < I
OUT
< I
OUT(MAX)
5 15 mV
Thermal Regulation ∆V
OUT
(Pwr) T
A
= 25°C, 20ms pulse 0.01 0.02 % / W
Ripple Rejection (Note 3) C
OUT
= 100µF (Tantalum), I
OUT
= 7.5V 60 83 dB
Quiescent Current I
Q
0mA < I
OUT
< I
OUT(MAX)
, 4.75V < V
IN
< 10V 4 10 mA
LX8584-xx ∆V
OUT
= 1%, I
OUT
= I
OUT(MAX)
1.4
LX8584A-xx ∆V
OUT
= 1%, I
OUT
= I
OUT(MAX
) 1.2
Dropout Voltage
LX8584B-xx
∆V
∆V
OUT
= 1%, I
OUT
= I
OUT(MAX)
1.4
V
Maximum Output Current I
OUT(MAX)
V
IN
< 7V 7 8 A
Temperature Stability (Note 3) ∆V
OUT
(T) 0.25 %
Long Term Stability (Note 3) ∆V
OUT
(t) T
A
= 125°C, 1000hs 0.3 1 %
RMS Output Noise (% of V
OUT
)
(Note 3)
V
OUT(RMS)
T
A
= 25°C, 10Hz < f < 10kHz 0.003 %
Note 2: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating
effects are covered under the specification for thermal regulation.
Note 3: These parameters, although guaranteed, are not tested in production.
E
E
L
L
E
E
C
C
T
T
R
R
I
I
C
C
A
A
L
L
S
S
P1-P3P4-P6P7-P9

LX8584-00CP

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