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LX8580A
Very Low Dropout
Positive Regulator
A Training Module for Sales Representatives
and Distributors of Microsemi Products
a network of semiconductor technology
What is the LX8580A ?
The LX8580A is a high-performance, very low
dropout voltage regulator, designed for use with
advanced microprocessors, micro controllers, or video
graphics controllers. This product can be used with
separate voltage supplies for the control and power
sections, providing a power regulation dropout voltage
as low as 100mV @ 1.5A
Key Product Features
• Low Dropout, 590mV (typ) at 7.5A
Output Current in Dual Supply Mode
• Fast Transient Response
• Remote Sensing
• Capable of 1mV Load Regulation
• Linear Post-Regulators
• Adjustable Output
LX 8580A Packaging
S-PAK 5-Pin
5 Pin TO-220
TAB is GND
TAB is GND
5
VPWR
VCTRL
5
4
VPWR
4
3
OUTPUT
3
OUTPUT
2
ADJUST
SENSE
2
1
ADJUST
1
SENSE
P PACKAGE (5-PIN)
DF PACKAGE
(Top View)
VCTRL
(Top View)
5 Pin TO-263
TAB is GND
5
VPWR
4
VCTRL
3
OUTPUT
2
ADJUST
1
SENSE
DD PACKAGE (5-PIN)
(Top View)
Typical Application
5.0V
Tantalum
33µF
VCTRL
VOUT = 2.8V
OUTPUT
SENSE
LX8580A
R1
500µF
3.3V
VPWR
ADJUST
Tantalum
100µF
R2
R1 = 121W
R2 = 150W
Product Applications
•Microprocessor/Micro controller
Supplies
•3.3V to 2.85V Voltage Conversion
•High-Current Regulators
•Post Regulation for Switching Power
Supplies
LX8580A
Competitive Analysis
Competitor
Part No.
VCTRL
Input
Range
(Max)
Semtech
EZ1580
13.2
+1%
80 dB
7.0 A
N/A
Microsemi
LX8580A
13V
+1%
80 dB
7.5 A
590mV
VREF
Tolerance
Ripple
Rej. @
120Hz
Max.
Output
Current
Dropout
Voltage
@ 7.5A
Notes
TO-220/263 pin
to pin
compatible
CS5257A
13
+1.5%
80 dB
7.0 A
N/A
TO-220/263 pin
to pin
compatible
Linear Tech
LT1580
13
+1.5%
80 dB
7.0 A
N/A
TO-220/263 pin
to pin
compatible
Unisem
US1175
14
+1%
80 dB
7.5 A
500mV
S-PAK & TO220/263 pin to
pin compatible
ON
Semiconductor
Sales Strategy
Identifying the Application
• Power supplies: isolated (AC:DC or
DC:DC) with regulated 3.3V (or lower)
output.
• Power for sub-2.5V integrated circuits
(e.g., microprocessors).
• Step-down power conversion (step down)
when minimal periphery components,
cost, and size are the focus.
Sales Strategy
Product Positioning
• Sell the LX8580A In Applications
1)Requiring low-voltage and high current.
2)Requiring 2.9V (and lower); where 5.0V
and 3.3V is available.
3)Where small volume packaging is
required.
Sales Strategy
Facts to Remember
•LX8580A
– Is specified from 0 to 125°C.
– Comes in industry standard
packages.
– Has the same pin-out as most
competitors.