LX8585 Microsemi Corporation, LX8585 Datasheet

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LX8585

Manufacturer Part Number
LX8585
Description
Low Drop Out Regulator - Positive Adjustable
Manufacturer
Microsemi Corporation
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LX8585-15CDD
Manufacturer:
Microsemi Analog Mixed Signal
Quantity:
135
Copyright © 1997
Rev. 2.2a, 2005-11-10
low dropout three-terminal regulators
with a minimum of 4.6A output
current.
Power PCTM applications requiring
fast transient response are ideally
suited for this product family. The
LX8585A is guaranteed to have <
1.2V at 4.6A, while the LX8585 are
specified for 1.4V, making them ideal
to provide well regulated outputs of
2.5V to 3.6V using a 5V input supply.
Fixed versions are also available and
specified in the Available Options
table below. Current limit is trimmed
above 4.6A to ensure adequate output
current and controlled
IMPORTANT: For the most current data, consult MICROSEMI’s website:
Thick traces represent high current traces which must be low resistance / low inductance
traces in order to achieve good transient response.
The LX8585/85A Series ICs are
5V
TM
220 µF
10V
Low ESR
from Sanyo
Pentium
3
V
3.50
3.38
V
OUT
IN
LX8585A
75 & 166 MH
Part
T
ADJ
0.1 µF
50V
HE
1
®
V
3
A
OUT
0 to 125
250pF
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PPLICATION OF THE
V
V
V
Open
T
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8585-15CDD-TR)
2
Short
Processor
+
+
+
JP1
SGND FGND
2
A
P R O D U C T H I G H L I G H T
LX1431
(°C)
Part
5
1k Ω
COL
Z
1
1k Ω
D E S C R I P T I O N
P54C P
6
REF
75/90/100/133MHz, STND, 5V Cache
0.01 µF
Dropout
8
Voltage
120 / 166MHz, VRE, 5V Cache
2.84k Ω
and
1.4V
1.2V
0.1%
LX8585A & LX1431
ROCESSORS
Typical Application
short-circuit current. On-chip thermal
limiting provides protection against any
possible overload that would create
excessive junction temperatures. The
LX8585/85A family is available in both
through-hole
versions of the industry standard 3-pin
TO-220 / TO-263 power packages.
Reference
products offer precision output voltage
and are ideal for use in VRE
applications (see application below).
For higher current applications, see the
LX8584 data sheet.
1k
0.1%
330 µ F, 6.3V
Oscon Type
from Sanyo
The
Low ESR
JP1
P A C K A G E O R D E R I N F O
21k
1%
(See Table Below)
P
U
2x
V O 4.6A
Integrated Products Division
SING
Transition DC: 0543
LX8585A-xxCP
LX8585-xxCP
®
RoHS Compliant
5V C
LX1431
Microsemi
http://www.microsemi.com
Plastic TO-220
3-Pin
and
PLACE IN µP SOCKET CAVITY
IN A
ACHE
and
1 µ F x 10
SMD
100 µ F x 6
AVX TYPE
LX8585A
10V
TPS
4.6A Low Dropout Positive Regulators
Programmable
surface-mount
Load
µP
Series
DD
P
RODUCTION
LX8585A-xxCDD
Transition DC: 0535
LX8585-xxCDD
RoHS Compliant
Other voltage options may be available.
Please contact factory for details.
Plastic TO-263
3-Pin
LX8585-xx / LX858A-xx
Available Options Per Part Number
LX8585/85A-00
LX8585/85A-15
LX8585/85A-33
Part #
Three Terminal Adjustable or
Fixed Output
Guaranteed < 1.2V headroom
@ 4.6A (LX8585A)
Guaranteed < 1.4V headroom
@ 4.6A (LX8585)
Guaranteed < 1.3V Headroom
@ 3A
Output Current of 4.6A
Minimum
Fast Transient Response
1% Voltage Reference Initial
Accuracy
Output Short Circuit Protection
Built-In Thermal Shutdown
Pentium Processor Supplies
Power PC Supplies
Microprocessor Supplies
Low Voltage Logic Supplies
Battery Powered Circuit
Post Regulator for Switching
Supply
CYRIX® 6x86™ Supplies
AMD-K5™ Supplies
D
ATA
K E Y F E A T U R E S
A P P L I C A T I O N S
S
HEET
Output Voltage
Adjustable
1.5V
3.3V
Page 1

Related parts for LX8585

LX8585 Summary of contents

Page 1

... Dropout T (°C) A Voltage 0 to 125 Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8585-15CDD-TR) Copyright © 1997 Rev. 2.2a, 2005-11-10 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® 4.6A Low Dropout Positive Regulators short-circuit current. On-chip thermal ...

Page 2

... A 60°C/W MBIENT JA , θ T 3.0°C θ A 60°C/W MBIENT JA x θ Microsemi Integrated Products Division LX8585-xx / LX858A- RODUCTION ATA HEET TAB is GND ADJ/GND ACKAGE (Top View) TAB is GND ...

Page 3

... Minimum Load Current Maximum Output Current (Note 4) Temperature Stability (Note 3) Long Term Stability (Note 3) RMS Output Noise (% of V )(Note 3) OUT LX8585-15 / 8585A-15 (1.5V FIXED) Output Voltage (Note 4) Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation (Note 3) Ripple Rejection (Note 3) Quiescent Current LX8585-15 ...

Page 4

... Figure 3 – 5V Regulator With Shutdown LX8585-33/85A-33 IN OUT GND Figure 4 – Fixed 3.3V Output Regulator ) Microsemi Integrated Products Division LX8585-xx / LX858A- ATA HEET LX8585/85A OUT IN V ADJ R1 121Ω C2 100µ 1.25V 1 + ...

Page 5

... SOA circuit keeps the amount of power that is dissipated in the regulator itself within safe limits for all values of input-to-output voltage within the operating range of the regulator. The LX8585/85A SOA protection system is designed to be able to supply some output current for all values of input-to-output voltage the device breakdown voltage. ...

Page 6

... Output ripple will be twice as bad as it would be if the ADJ pin were to be bypassed to ground with a properly selected capacitor. OUTPUT VOLTAGE The LX8585/85A ICs develop a 1.25V reference voltage between the output and the adjust terminal (See Figure 6). By placing a resistor, R1, between these two terminals, a constant current is caused to flow through R1 and down through R2 to set the overall output voltage ...

Page 7

... V DROPOUT (MAX) installed regulator. THERMAL CONSIDERATIONS The LX8585/85A regulators have internal power and thermal limiting circuitry designed to protect each device under overload conditions. For continuous normal load conditions, however, maximum junction temperature ratings must not be exceeded important to give careful consideration to all sources of thermal resistance from junction to ambient ...

Page 8

... K T 5.84 U 0.508 Note: 1. Dimensions do not include mold flash or protrusions; J these shall not exceed 0.155mm(.006”) on any side. Lead dimension shall not include solder coverage. Microsemi Integrated Products Division LX8585-xx / LX858A- ATA HEET I ILLIMETERS NCHES MAX MIN MAX 15.88 0.560 0.625 10 ...

Page 9

... 14. Note: 1. Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006”) on any side. dimension shall not include solder coverage. Microsemi Integrated Products Division LX8585-xx / LX858A- ATA HEET I ILLIMETERS NCHES MAX MIN MAX 10.67 0.395 0.420 9 ...

Page 10

... Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 1997 Rev. 2.2a, 2005-11-10 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 LX8585-xx / LX858A-xx ® 4.6A Low Dropout Positive Regulators P RODUCTION ...

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