LX8580-00CP [MICROSEMI]
7A VERY LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR; 7A非常低压差正可调稳压器
| 型号： | LX8580-00CP |
| 厂家： | 
Microsemi |
| 描述： | 7A VERY LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR |
| 文件： | 总4页 (文件大小：125K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LX8580
7A VERY LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
T H E I N F I N I T E P O W E R O F I N N O V A T I O N
P R O D U C T I O N D A T A S H E E T
DESCRIPTION
KEY FEATURES
I Low Dropout, 800mV Max. at 7A
The LX8580 is a high-performance, very
low dropout voltage regulator, designed for
use with advanced microprocessors. This
product can be used with separate voltage
supplies for the control and power sections,
allowing a power section dropout voltage
as low as 100mV. The LX8580 can also be
used in a single voltage supply configuration,
with a dropout performance similar to that
of the LX8584 (1.3V at 7A).
implementation of remote (Kelvin) voltage
sensing. This sensing compensates for
Output Current in Dual Supply Mode
I Fast Transient Response
I Remote Sensing
! 1mV Load Regulation
! Adjustable Output
! No Supply Sequencing Problems in Dual
Supply Mode
output voltage variations due to load
changes and resistive voltage drops in
connectors and board traces. Typical load
regulation measured at the sense pin is less
than 1mV for a load current step of 7mA
to 7A.
The LX8580 is ideal for generating a
secondary 2 - 2.5V low voltage supply on a
motherboard where a 3.3V supply is already
available.
APPLICATIONS
The LX8580 is supplied in a five-
terminal TO-220 package, which allows the
I Microprocessor Supplies
I 3.3V to 2.5V Processor Power Supplies
I High-Current Regulators
I Post Regulators for Switching Supplies
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
SPECIAL CAPABILITIES OF THE LX8580 TO ALLOW 44%
SMALLER LDO THERMAL DISSIPATION
4
5
3
VCTRL
OUTPUT
VCTRL
³
VOUT + 1.3V Max
VOUT
LX8580
1
VPWR
SENSE
VPWR
³
VOUT + VDROPOUT
ADJUST
RA
2
LOAD
RB
RB
VOUT = VREF 1 +
+ IADJ x RB
RA
PACKAGE ORDER INFORMATION
Plastic TO-220
5-pin
Plastic TO-263
Dropout
Voltage
TA (°C)
P
DD
5-pin
0 to 125
0.1V - 0.8V
LX8580-00CP
LX8580-00CDD
L I N F I N I T Y M I C R O E L E C T R O N I C S I N C .
11861WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX:714-893-2570
Copyright © 1999
Rev. 1.0 11/99
1
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LX8580
7A VERY
L
OW
P R O D U C T I O N D A T A S H E E T
ABSOLUTE MAXIMUM RATINGS (Note 1)
DROPOUT POSITIVE ADJUSTABLE REGULATOR
PACKAGE PIN OUTS
PowerDissipation ......................................................................................InternallyLimited
VPWR InputVoltage ........................................................................................................... 7V
VCTRL InputVoltage......................................................................................................... 13V
OperatingJunctionTemperature
Plastic (P Package) ................................................................................................ 150°C
Storage Temperature Range ...................................................................... -65°C to 150°C
Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C
TAB IS OUTPUT
VPWR
5
VCTRL
OUTPUT
ADJUST
SENSE
1
Note 1. Exceeding these ratings could cause damage to the device. All voltages are with respect
to Ground. Currents are positive into, negative out of the specified terminal.
P PACKAGE
(TopView)
THERMAL DATA
TAB IS OUTPUT
P PACKAGE:
5
4
3
2
1
VPWR
VCTRL
THERMAL RESISTANCE-JUNCTION TO TAB, θJT
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
DD PACKAGE:
3.0°C/W
60°C/W
OUTPUT
ADJUST
SENSE
THERMAL RESISTANCE-JUNCTION TO TAB, θJT
3.0°C/W
60°C/W
DD PACKAGE
(TopView)
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
Junction Temperature Calculation: TJ = TA + (PD x θJA).
The θ numbers are guidelines for the thermal performance of the device/pc-board system.
All ofJtAhe above assume no ambient airflow.
BLOCK DIAGRAM
Control
VCTRL
Power
VPWR
Current
Limiting
Amplifier
OUTPUT
Thermal Overload
SENSE
Voltage
Regulation
Amplifier
VREF
ADJUST
Copyright © 1999
Rev. 1.0 11/99
2
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LX8580
7A VERY LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
P R O D U C T I O N D A T A S H E E T
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures 0°C ≤ TA ≤ 125°C. Low duty cycle pulse testing
techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
LX8580
Min. Typ.
Parameter
Symbol
Test Conditions
Units
Max.
Reference Voltage
VREF
VCTRL = 2.75V, VPWR = 2V, ILOAD = 10mA, TJ = 25°C
VCTRL = 2.7V to6V,VPWR = 1.75V to 5.5V, IOUT = 10mA to 4A
VCTRL = 2.7V to6V,VPWR = 2.05V to 5.5V, IOUT = 10mA to 7A
1.243 1.250 1.257
1.237 1.250 1.263
1.237 1.250 1.263
V
V
V
Line Regulation
∆VREF (VIN) VCTRL =2.5Vto12V, VPWR =1.75Vto5.5V, ILOAD =10mA, TJ=25°C
1
2
2
3
6
7
mV
mV
mV
%/W
°C/W
dB
mA
mA
mA
mA
µA
A
VCTRL =2.5Vto12V, VPWR =1.75Vto5.5V, ILOAD =10mA
Load Regulation
∆VREF (IOUT
∆VOUT (Pwr) 30ms Pulse
RθJT Control Circuitry/Power Transistor
) VCTRL = 2.75V, VPWR = 2.1V, ILOAD = 10mA to 7A (VADJ = 0)
Thermal Regulation
Thermal Resistance
Ripple Rejection
0.002 0.020
0.65
80
3
30
2.70
VCTRL = VPWR = 3.75V Avg, VRIPPLE = 1VP-P, VADJ = 0V, IOUT = 4A
VCTRL = 2.75V, VPWR = 2.05V, ILOAD = 100mA
VCTRL = 2.75V, VPWR = 2.05V, ILOAD = 4A
60
Control Pin Current (Note 3)
ICTRL
10
60
VCTRL = 2.75V, VPWR = 1.75V, ILOAD = 4A
VCTRL = 2.75V, VPWR = 2.05V, ILOAD = 7A
33
60
60
70
120
120
Adjust Pin Current
Current Limit
IADJ
Iθ(MAX)
VCTRL = 2.75V, VPWR = 2.05V, ILOAD = 0mA (VADJ = 0)
VCTRL = 2.75V, VPWR = 2.05V, ∆VOUT = 100mV (VADJ = 0)
7.1
9
Dropout Voltage (Control Section) VCTRL - VOUT VPWR = 2.05V, ILOAD = 100mA
0.90
1.00
1.05
1.06
1.10
0.05
0.10
0.20
0.30
0.30
0.52
0.56
5
1.15
1.15
1.18
1.20
1.30
0.17
0.22
0.38
0.40
0.50
0.62
0.80
10
V
V
Minimum VCTRL (Note 2)
(VPWR - VOUT
VPWR = 2.05V, ILOAD = 1A
VPWR = 2.05V, ILOAD = 2.75A
VPWR = 2.05V, ILOAD = 4A
)
V
V
V
V
VPWR = 2.05V, ILOAD = 7A
Dropout Voltage (Power Section)
Minimum VPWR (Note 2)
VPWR - VOUT VCTRL = 2.75V, ILOAD = 100mA
VCTRL = 2.75V, ILOAD = 1A
V
V
V
(VPWR - VOUT
(VADJ = 0)
)
VCTRL = 2.75V, ILOAD = 2.75A
VCTRL = 2.75V, ILOAD = 4A, TJ = 25°C
VCTRL = 2.75V, ILOAD = 4A
V
V
V
VCTRL = 2.75V, ILOAD = 7A, TJ = 25°C
VCTRL = 2.75V, ILOAD = 7A
Minimum Load Current
VCTRL = 5V, VPWR = 3.3V, VADJ = 0V
mA
Note 2. Dropout is caused by either minimum control voltage (VCTRL) or minimum power voltage (VPWR). Both parameters are specified with respect to
the output voltage. The specifications represent the minimum input/output voltage required to maintain 1% regulation.
Note 3. The control pin current is the drive current required for the output transistor. This current will track output current with roughly a 1:100 ratio.
The minimum value is equal to the quiescent current of the device.
Copyright © 1999
Rev. 1.0 11/99
3
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LX8580
7A VERY LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
P R O D U C T I O N D A T A S H E E T
FUNCTIONAL PIN DESCRIPTION
Pin
#
Description
SENSE
1
Thispinisthepositivesideofthereferencevoltageforthedevice. WiththispinitispossibletoKelvin-sensetheoutputvoltage
atload.
ADJUST
2
Thispinisthenegativesideofthereferencevoltageforthedevice. Ripplerejectioncanbeimprovedbyaddingasmallbypasscapacitor
fromtheAdjustpintoground. ThecapacitorvalueshouldbeselectedsothatCR ≤1/2πFRRA ,whereFR istheripplefrequency
andRA isthevalueoftheresistorbetweentheoutputandsenseleadsoftheLX8580.
OUTPUT
VCTRL
3
4
Thisisthepoweroutputofthedevice.
Thispinisthevoltagesupplypinforthecontrolcircuitryofthedevice. Thecurrentflowintothispinwillbeabout1%oftheoutput
current. Forthedevicetoregulate,thevoltageatthispinmustbebetween1.0Vand1.3Vgreaterthantheoutputvoltage.
VPWR
5
ThisisthecollectorofthepowersectionoftheLX8580. Theoutputloadcurrentissuppliedthroughthispin. Forthedeviceto
regulate,thevoltageatthispinmustbebetween0.1Vand0.8Vgreaterthantheoutputvoltage(higheroutputcurrentsrequirehigher
voltagesbetweenVPWR andOUTPUT).
BASIC APPLICATION CIRCUIT
Tantalum
33µF 10V
4 x 1
(Parallel Connected)
W
2W 5%
2.89 (MAX)
2.67 (MIN)
VOUT = 2.775
OUTPUT
SENSE
VCTRL
VPWR
LX8580
5.0V
0.25
W
ADJUST
"Electronic Heatsink"
Resistor reduces
thermal load
121
1%
W
6000µF
on LDO heatsink
to 6.9W
LOAD
(4X Sanyo 6mV 1500GK
6.3V 1500µF)
Tantalum
100µF
10V
147
1%
W
5A
*Note
SYSTEM GROUND
*Note: For improved transient response, add capacitor as shown (typical 15µF).
PRODUCTIONDATA-InformationcontainedinthisdocumentisproprietarytoLinFinity, andiscurrentasofpublicationdate. Thisdocument
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.
Copyright © 1999
Rev. 1.0 11/99
4
相关型号：
LX8580-00CP-TR
Adjustable Positive LDO Regulator, 0.8V Dropout, PSFM5, ROHS COMPLIANT, PLASTIC, TO-220, 5 PIN
MICROSEMI
LX8580A-00CDF-TR
Adjustable Positive LDO Regulator, 1.3V Dropout, PSSO5, ROHS COMPLIANT, PLASTIC, S-PACK, 5 PIN
MICROSEMI
LX8580A-00CP-TR
Adjustable Positive LDO Regulator, 1.3V Dropout, PSFM5, PLASTIC, TO-220, 5 PIN
MICROSEMI
LX8580A-00CPT
Adjustable Positive LDO Regulator, 1.3V Dropout, PSFM5, PLASTIC, TO-220, 5 PIN
MICROSEMI
©2020 ICPDF网 联系我们和版权申明