LX8580A Datasheet, PDF (1/8 Pages) Microsemi Corporation – 7.5A Very Low Dropout Positive Regulator

INTEGRATED PRODUCTS
LX8580A
7.5A Very Low Dropout Positive Regulator
PRODUCTION DATA SHEET
DESCRIPTION
The LX8580A is a high- similar to that of the LX8584 (1.3V @
performance, very low dropout voltage 7.5A).
regulator, designed for use with The LX8580A is supplied in a five-
advanced microprocessors, micro terminal TO-220, TO-263, or
controllers, or video graphics Linfinity’s S-PAK packages, which
controllers. This product can be used allows the implementation of remote
with separate voltage supplies for the (Kelvin) voltage sensing. This sensing
control and power sections, allowing a compensates for output voltage
power regulation dropout voltage as variations due to load changes and
low as 100mV @ 1.5A. In AGP bus resistive voltage drops in connectors
systems requiring regulation of 3.3V and board traces. Typical load
to 2.85V @ 3A, the LX8580A has a regulation measured at the sense pin is
max dropout of 250mV making it an less that 1mV for a load current step of
ideal power supply solution for today’s 7mA to 7.5A.
graphics applications.
The LX8580A is ideal for generating a
The LX8580A can also be used in a secondary 2V-2.85V low voltage supply
single voltage supply configuration on a motherboard where a 3.3V supply
with a dropout performance is already available.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
KEY FEATURES
Low Dropout, 650mV at 7.5A
Output Current in Dual Supply
Mode
Fast Transient Response
Remote Sensing
1mV Load Regulation
Adjustable Output
APPLICATIONS/BENEFITS
Microprocessor/Micro controller
Supplies
3.3V to 2.85V Voltage
Conversion
High-Current Regulators
Post Regulation for Switching
Power Supplies
V_CTRL ≥ V_OUT + 1.3V Max
4 _VCTRL
3
OUTPUT
V_PWR ≥ V_OUT + V_DROPOUT
LX8580A
5 ^{VPW R}
SENSE
1
ADJUST
2
V_OUT
=

V_{REF } 1 +

R₂
R₁

 ^{+ IADJ × R 2}

R₁
R_L
R₂
V_OUT
T_A (°C)
0 to 125
DROPOUT
VOLTAGE
0.1V – 0.7V
PACKAGE ORDER INFO
Plastic TO-220
S-PAK
P _5-Pin
DF _5-pin
LX8580A-00CP LX8580A-00CDF
Plastic TO-263
DD _5-PIN
LX8580A-00CDD
Note: Available in Tape & Reel.
Append the letter “T” to the part number. (i.e. LX8580A-00CDDT)
Copyright  2001
Rev. 1.4, 2003-01-06
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
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