LX8580 Microsemi Corporation, LX8580 Datasheet - Page 4

• Manufacturer Part Number: LX8580
• Description: 7a Very Low Dropout Positive Adjustable Regulator
• Manufacturer: Microsemi Corporation

LX8580
4
*Note: For improved transient response, add capacitor as shown (typical 15µF).
OUTPUT
ADJUST
SENSE
V
V
Pin
CTRL
PWR
5.0V
"Electronic Heatsink"
#
1
2
3
4
5
on LDO heatsink
Resistor reduces
Description
This pin is the positive side of the reference voltage for the device. With this pin it is possible to Kelvin-sense the output voltage
at load.
This pin is the negative side of the reference voltage for the device. Ripple rejection can be improved by adding a small bypass capacitor
from the Adjust pin to ground. The capacitor value should be selected so that C
and R
This is the power output of the device.
This pin is the voltage supply pin for the control circuitry of the device. The current flow into this pin will be about 1% of the output
current. For the device to regulate, the voltage at this pin must be between 1.0V and 1.3V greater than the output voltage.
This is the collector of the power section of the LX8580. The output load current is supplied through this pin. For the device to
regulate, the voltage at this pin must be between 0.1V and 0.8V greater than the output voltage (higher output currents require higher
voltages between V
(Parallel Connected)
thermal load
4 x 19
A
to 6.9W
is the value of the resistor between the output and sense leads of the LX8580.
0.259
2W 5%
PRODUCTION DATA - Information contained in this document is proprietary to LinFinity, and is current as of publication date. This document
may not be modified in any way without the express written consent of LinFinity. Product processing does not necessarily include testing of all
parameters. Linfinity reserves the right to change the configuration and performance of the product and to discontinue product at any time.
7A V
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
PWR
Tantalum
100µF
10V
and OUTPUT).
ERY
F U N C T I O N A L P I N D E S C R I P T I O N
V
V
P
B A S I C A P P L I C A T I O N C I R C U I T
CTRL
PWR
L
R O D U C T I O N
OW
LX8580
D
ROPOUT
ADJUST
*Note
Tantalum
33µF 10V
OUTPUT
SENSE
P
OSITIVE
1219
1%
1479
1%
D
V
A T A
OUT
A
SYSTEM GROUND
DJUSTABLE
= 2.775
S
LOAD
H E E T
2.89 (MAX)
2.67 (MIN)
R
EGULATOR
R
≤ 1 / 2πF
5A
R
6000µF
(4X Sanyo 6mV 1500GK
6.3V 1500µF)
R
A
, where F
R
is the ripple frequency
Copyright © 1999
Rev. 1.0
11/99