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LX8585A-33CDD

P1-P3P4-P6P7-P9P10-P10
LX8585-xx / LX858A-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. 2.2a, 2005-11-10
WWW.Microsemi .COM
4.6A Low Dropout Positive Regulators
TM
®
DESCRIPTION
The LX8585/85A Series ICs are
low dropout three-terminal regulators
with a minimum of 4.6A output
current. Pentium
®
Processor and
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
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 and surface-mount
versions of the industry standard 3-pin
TO-220 / TO-263 power packages.
The LX1431 Programmable
Reference and LX8585A Series
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.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
Part
Part
THE APPLICATION OF THE LX8585A & LX1431 IN A
75 & 166 MHZ P54C PROCESSORS USING 5V CACHE
µP
Load
100 µ F x 6
10V
AVX TYPE
TPS
1µ F x 10
SMD
1k
0.1%
2.84k Ω
0.1%
COL
V
+
V
+
V
+
SGND FGND
REF
LX1431
V
IN
V
OUT
ADJ
1k Ω
1k Ω
0.01 µF
2x
330 µ F, 6.3V
Low ESR
Oscon Type
from Sanyo
23
1
65
8
1
3
0.1 µF
50V
220 µF
10V
Low ESR
from
Sanyo
5V
PLACE IN µP SOCKET CAVITY
LX8585A
2
250pF
21k
1%
JP1
V
O
4.6A
(See Table Below)
V
OUT
JP1 Typical Application
3.50 Short 120 / 166MHz, VRE, 5V Cache
3.38 Open 75/90/100/133MHz, STND, 5V Cache
Thick traces represent high current traces which must be low resistance / low inductance
traces in order to achieve good transient response.
KEY FEATURES
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
APPLICATIONS
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
Available Options Per Part Number
Part # Output Voltage
LX8585/85A-00 Adjustable
LX8585/85A-15 1.5V
LX8585/85A-33 3.3V
Other voltage options may be available.
Please contact factory for details.
PACKAGE ORDER INFO
P
Plastic TO-220
3-Pin
DD
Plastic TO-263
3-Pin
T
A
(°C)
Dropout
Voltage
RoHS Compliant
Transition DC: 0543
RoHS Compliant
Transition DC: 0535
1.4V LX8585-xxCP LX8585-xxCDD
0 to 125
1.2V LX8585A-xxCP LX8585A-xxCDD
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8585-15CDD-TR)
L
L
X
X
8
8
5
5
8
8
5
5
LX8585-xx / LX858A-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. 2.2a, 2005-11-10
WWW.Microsemi .COM
4.6A Low Dropout Positive Regulators
TM
®
ABSOLUTE MAXIMUM RATINGS
Power Dissipation ....................................................................................Internally Limited
Input Voltage .................................................................................................................10V
Input to Output Voltage Differential..............................................................................10V
Maximum Operating Junction Temperature .............................................................. 150°C
Storage Temperature Range.........................................................................-65°C to 150°C
Peak Package Temp. for Solder Reflow (40 seconds max. 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
PlasticTO-220 3-Pin
THERMAL RESISTANCE-JUNCTION TO TAB, θ
JT
3.0°C/W
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θ
JA
60°C/W
DD
Plastic TO-263 3-Pin
THERMAL RESISTANCE-JUNCTION TO TAB, θ
JT
3.0°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)
1
ADJ / GND*
V
OUT
V
IN
2
3
TAB is GND
DD PACKAGE
(Top View)
* Pin 1 is GND for fixed voltage versions
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
LX8585-xx / LX858A-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. 2.2a, 2005-11-10
WWW.Microsemi .COM
4.6A Low Dropout Positive Regulators
TM
®
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C ≤ T
A
≤ 70°C except where
otherwise noted and the following test conditions:.
LX8585/85A
Parameter Symbol Test Conditions
Min Typ Max
Units
` LX8585-00 / 8585A-00 (ADJUSTABLE)
I
OUT
= 10mA, T
A
= 25°C 1.238 1.250 1.262
Reference Voltage V
REF
10mA < I
OUT
< 4.6A, 1.5V < (V
IN
– V
OUT
), V
IN
< 7V,
P <
P
MAX
1.225 1.250 1.275
V
Line Regulation (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
< 4.6V 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,
T
A
= 25°C, I
OUT
= 4.6V
60 83 dB
Adjust Pin Current I
ADJ
55 100 µA
Adjust pin Current Change ∆I
ADJ
10mA <
I
OUT
< 4.6A, 1.5V < (V
IN
– V
OUT
),
V
IN
< 7V
0.2 5 µA
∆V
REF
= 1%, I
OUT
= 4.6A 1.2 1.4
LX8585
∆V
REF
= 1%, I
OUT
= 3A 1.1 1.3
Dropout Voltage
LX8585A
∆V
∆V
REF
= 1%, I
OUT
= 4.6A 1.1 1.2
V
Minimum Load Current I
OUT(MIN)
V
IN
< 7V 2 10 mA
Maximum Output Current (Note 4) I
OUT(MAX)
1.4V < (V
IN
– V
OUT
), V
IN
< 7V 4.6 6 A
Temperature Stability (Note 3) ∆V
OUT
(t) 0.25 %
Long Term Stability (Note 3) ∆V
OUT
(t) T
A
= 125°C, 1000hrs 0.3 1 %
RMS Output Noise
(% of V
OUT
)(Note 3)
V
OUT(RMS)
T
A
= 125°C, 10Hz < f < 10kHz 0.003 %
` LX8585-15 / 8585A-15 (1.5V FIXED)
V
IN
= 5V, I
OUT
= 0mA, T
A
= 25°C 1.485 1.50 1.515
Output Voltage (Note 4) V
OUT
4.75 <
V
IN
< 10V, 0mA < I
OUT
< 7A, T
A
= 25°C, P
<
P
MAX
1.470 1.50 1.530
V
4.75 < V
IN
< 7V 1 3 mV
Line Regulation (Note 2) ∆V
OUT
(V
IN
)
4.75V <
V
IN
< 10V 1 5
Load Regulation (Note 2) ∆V
OUT
(I
OUT
) V
IN
= 5V, 10mA < I
OUT
< I
OUT(MAX)
2.5 7 mV
Thermal Regulation (Note 3) ∆V
OUT
(Pwr) T
A
= 25°C, 20ms pulse 0.01 0.02 % / W
Ripple Rejection (Note 3)
C
OUT
= 100µF (Tantalum), I
OUT
= 4.6A,
T
A
= 25°C
65 83 dB
Quiescent Current I
Q
0mA < I
OUT
< I
OUT(MAX)
, 4.75V < V
IN
< 10V 4 10 mA
∆V
OUT
= 1%, I
OUT
< I
OUT(MAX)
, V
IN
- V
OUT
< 7V 1.2 1.4
LX8585-15
∆V
OUT
= 1%, I
OUT
< 3A, V
IN
- V
OUT
< 7V 1.1 1.3
Dropout Voltage
LX8585A-15
∆V
∆V
OUT
= 1%, I
OUT
< I
OUT(MAX)
, V
IN
- V
OUT
< 7V 1.1 1.2
V
Temperature Stability (Note 3) ∆V
OUT
(T) 0.25 %
Long Term Stability (Note 3) ∆V
OUT
(t) T
A
= 125°C, 1000hrs 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 regulations.
Note 3: These parameters, although guaranteed, are not tested in production.
Note 4: I
OUT(MAX)
is measured under the condition that V
OUT
is forced below its nominal value by 100mV.
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-P9P10-P10

LX8585A-33CDD

Mfr. #:
Buy LX8585A-33CDD
Manufacturer:
Microchip / Microsemi
Description:
IC REG LIN 3.3V 4.6A TO263 POWER
Lifecycle:
New from this manufacturer.
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