Microsemi Corporation LX8584B-33CV, LX8584B-00CP, LX8584A-33CV, LX8584A-33CP, LX8584A-00CV Datasheet
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LIN DOC #:
Output Current - (A)
Input / Output Differential - (V)
1.0
0 1.75 3.5 5.25
0.5
1.5
7
TJ = 125°C
LX8584/84A
LX8584
LX8584A
8584
LX8584-xx/8584A-xx/8584B-xx
THE INFINITE POWER OF INNOVATION
DESCRIPTION KEY FEATURES
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
sor and Power PC
TM
applications requiring
®
Proces-
fast transient response. The LX8584A is guar-
anteed 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 of-
fers ±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 in
conjunction with the LX8584 7A LDO products offer precision output voltage (see application below) and are ideal for use in VRE
applications.
PRODUCT HIGHLIGHT
THE APPLICATION OF THE LX8584A & LX1431 IN A
75 & 166MHZ P54C PROCESSORS USING 3.3V CACHE
V
1
3
23
OUT
250pF
2
+V+V+
V
LX1431
SGND FGND
1kW
COL
330µF, 6.3V
0.01µF
1kW
1
8
REF
65
2.84kW
0.1%
1k
0.1%
220µF
10V
Low ESR
from
Sanyo
V
IN
LX8584A
ADJ
0.1µF
50V
5V
(See Table Below)
Low ESR
Oscon Type
from Sanyo
21k
1%
JP1
VO 7A
3x
7A LOW D
P RODUCTION DATA SHEET
PLACE IN µP SOCKET CAVITY
100µF x 6
10V
AVX TYPE
TPS
1µF x 10
SMD
ROPOUT POSITIVE REGULATORS
■■
■ 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
■■
p FAST TRANSIENT RESPONSE
p 1% VOLTAGE REFERENCE INITIAL
ACCURACY
p OUTPUT SHORT CIRCUIT PROTECTION
p 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
DROPOUT VOLTAGE VS.
OUTPUT CURRENT
µP
Load
V
3.50 Short 120/166MHz, VRE, 3.3V Cache
3.38 Open 75/90/100/133MHz, STND, 3.3V Cache
Copyright © 1997
Rev. 1.2 4/97
Thick traces represent high current traces which must be low resistance /
low inductance in order to achieve good transient response.
(°C)
T
A
0 to 125 LX8584B-xxCP LX8584B-xxCV
OUT
JP1 TYPICAL APPLICATION
PACKAGE ORDER INFORMATION
Dropout
Voltage
1.4V
Plastic TO-220
P
3-pin
LX8584-xxCP LX8584-xxCV
Plastic TO-247
V
3-terminal
1.2V LX8584A-xxCP LX8584A-xxCV
"xx" refers to output voltage, please see table above.
FOR FURTHER INFORMATION CALL (714) 898-8121
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841
AVAILABLE OPTIONS PER PART #
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.
1
PRODUCT DATABOOK 1996/1997
LX8584-xx/8584A-xx/8584B-xx
7A LOW D
P
ROPOUT POSITIVE REGULATORS
RODUCTION DATA SHEET
ABSOLUTE MAXIMUM RATINGS (Note 1)
Power Dissipation .................................................................................. Internally Limited
Input Voltage................................................................................................................ 10V
Input to Output Voltage Differential ........................................................................... 10V
Maximum Output Current ............................................................................................. 8A
Operating Junction Temperature
Plastic (P Package) ................................................................................................ 150°C
Storage Temperature Range ...................................................................... -65°C to 150°C
Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C
Note 1. Exceeding these ratings could cause damage to the device. All voltages are with respect
to Ground. Currents are positive into, negative out of the specified terminal.
THERMAL DATA
P PACKAGE:
THERMAL RESISTANCE-JUNCTION TO TAB,
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
θθ
θ
θθ
JT
θθ
θ
θθ
JA
V PACKAGE:
THERMAL RESISTANCE-JUNCTION TO TAB,
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
Junction Temperature Calculation: TJ = TA + (P
numbers are guidelines for the thermal performance of the device/pc-board system.
The θ
JA
All of the above assume no ambient airflow.
θθ
θ
θθ
JT
θθ
θ
θθ
JA
x θ
).
D
JA
2.7°C/W
60°C/W
1.6°C/W
35°C/W
PACKAGE PIN OUTS
TAB IS V
OUT
3
2
1
P PACKAGE
(Top View)
* Pin 1 is GND for fixed voltage versions.
TAB ON REVERSE SIDE IS V
3
2
1
V PACKAGE
* Pin 1 is GND for fixed voltage versions.
(Top View)
V
V
ADJ / GND*
OUT
V
ADJ / GND*
IN
OUT
V
IN
OUT
2
Copyright © 1997
Rev. 1.2 4/97
PRODUCT DATABOOK 1996/1997
LX8584-xx/8584A-xx/8584B-xx
7A LOW D
ROPOUT POSITIVE REGULATORS
P RODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for the LX8584-xxC/84A-xxC/84B-xxC with 0°C ≤ TA ≤ 125°C;
- V
V
= 3V; I
IN
OUT
LX8584-00/84A-00/84B-00 (Adjustable)
Reference Voltage LX8584/84A-00 V
Line Regulation (Note 2)
Load Regulation (Note 2)
Thermal Regulation
Ripple Rejection (Note 3) V
Adjust Pin Current I
Adjust Pin Current Change ∆I
Dropout Voltage LX8584A ∆V ∆V
Minimum Load Current I
Maximum Output Current I
Temperature Stability ∆V
Long Term Stability ∆V
RMS Output Noise (% of V
= 7A. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
OUT
Parameter
Symbol
REFIOUT
10mA ≤ I
LX8584B-00 I
10mA ≤ I
∆V
(VIN)
I
REF
∆V
(I
)
VIN - V
REF
OUT
∆V
(Pwr)
TA = 25°C, 20ms pulse
OUT
C
ADJ
10mA ≤ I
ADJ
LX8584/84B ∆V
LX8584/84B ∆V
OUT(MIN)VIN
OUT (MAX)
)V
OUT
1.4V ≤ (V
(T)
OUT
(t) TA = 125°C, 1000 hrs
OUT
OUT (RMS)TA
Test Conditions Units
= 10mA, TA = 25°C
≤ 7A, 1.5V ≤ (V
OUT
= 10mA, TA = 25°C
OUT
OUT
OUT
ADJ
REF
REF
REF
≤ 7V
= 25°C, 10Hz ≤ f ≤ 10kHz
≤ 7A, 1.5V ≤ (V
OUT
= 10mA, 1.5V ≤ (V
= 3V, 10mA ≤ I
OUT
= 3.3V, f =120Hz, C
= 10µF, I
= 1%, I
= 1%, I
= 1%, I
= 7A
OUT
≤ 7A, 1.5V ≤ (V
OUT
= 7A
OUT
= 7A
OUT
= 6A
OUT
- V
), V
IN
OUT
IN
≤ 7V
IN
- V
), V
OUT
OUT
IN
OUT
), V
≤ 7V
), V
IN
IN
IN
≤ 7V, P ≤ P
≤ 7V, P ≤ P
≤ 7V
IN
- V
IN
- V
), V
OUT
≤ 7A
OUT
= 100µf Tantalum, VIN = 5V
OUT
- V
IN
MAX
MAX
LX8584/84A/84B-00
Min. Typ. Max.
1.238 1.250 1.263 V
1.225 1.250 1.275 V
1.240 1.250 1.260 V
1.238 1.250 1.263 V
0.035 0.2 %
0.1 0.5 %
0.01 0.02 %/W
65 83 dB
55 100 µA
0.2 5 µA
1.1 1.2 V
1.2 1.4 V
1.1 1.3 V
210mA
78 A
0.25 %
0.3 1 %
0.003 %
LX8584-33/84A-33/84B-33 (3.3V Fixed)
Parameter
Output Voltage LX8584/84A-33 V
LX8584B-33 VIN = 5V, I
Line Regulation (Note 2) ∆V
Load Regulation (Note 2)
Thermal Regulation
Ripple Rejection (Note 3) C
Quiescent Current I
Dropout Voltage LX8584-xx ∆V ∆V
LX8584A-xx ∆V
LX8584B-xx ∆V
Maximum Output Current I
Temperature Stability (Note 3) ∆V
Long Term Stability (Note 3) ∆V
RMS Output Noise (% of V
) (Note 3) V
OUT
Symbol
OUTVIN
(V
∆V
OUT
OUT
OUT
OUT (RMS)TA
= 5V, I
4.75V ≤ VIN ≤ 10V, 0mA ≤ I
4.75V ≤ V
OUT
)
IN
4.75V ≤ VIN ≤ 10V
∆V
)
OUT(IOUT
(Pwr)
TA = 25°C, 20ms pulse
= 100µF (Tantalum), I
OUT
0mA ≤ I
Q
OUT
= 1%, I
OUT
= 1%, I
OUT
= 1%, I
OUT
OUT (MAX)VIN
(T)
(t) TA = 125°C, 1000 hours
= 25°C, 10Hz ≤ f ≤ 10kHz
Test Conditions Units
= 0mA, TA = 25°C
OUT
= 0mA, TA = 25°C
OUT
≤ 10V, 0mA ≤ I
IN
4.75V ≤ VIN ≤ 7V
V
= 5V, 0mA ≤ I
IN
≤ I
, 4.75V ≤ VIN ≤ 10V
OUT (MAX)
= I
OUT
OUT (MAX)
= I
OUT
OUT (MAX)
= I
OUT
OUT (MAX)
≤ 7V
≤ 7A, P ≤ P
OUT
≤ 7A, P ≤ P
OUT
≤ I
OUT
= 7.5V
OUT
MAX
MAX
OUT (MAX)
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.
LX8584/84A/84B-33
Min. Typ. Max.
3.267 3.30 3.333 V
3.234 3.30 3.366 V
3.274 3.30 3.326 V
3.267 3.30 3.333 V
16mV
210mV
515mV
0.01 0.02 % / W
60 83 dB
410mA
1.4 V
1.2 V
1.4 V
`7 8 A
0.25 %
0.3 1 %
0.003 %
Copyright © 1997
Rev. 1.2 4/97
3
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