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LT1581CT7-2.5

Description
10A, Very Low Dropout Regulators
CategoryPower/power management    The power supply circuit   
File Size214KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LT1581CT7-2.5 Overview

10A, Very Low Dropout Regulators

LT1581CT7-2.5 Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeTO-220
package instructionZIP, ZIP7,.15,.2TB
Contacts7
Manufacturer packaging codeT7
Reach Compliance Code_compli
ECCN codeEAR99
AdjustabilityFIXED
Maximum drop-back voltage 10.7 V
Nominal dropback voltage 10.43 V
Maximum absolute input voltage6 V
JESD-30 codeR-PZFM-T7
JESD-609 codee0
Maximum grid adjustment rate0.003%
Maximum grid regulation rate (%/V)0.097
Maximum load regulation0.01%
Maximum load regulation (%)0.8%
Humidity sensitivity level1
Number of functions1
Output times1
Number of terminals7
Working temperatureTJ-Max125 °C
Operating temperatureTJ-Mi
Maximum output current 110 A
Maximum output voltage 12.525 V
Minimum output voltage 12.475 V
Nominal output voltage 12.5 V
Package body materialPLASTIC/EPOXY
encapsulated codeZIP
Encapsulate equivalent codeZIP7,.15,.2TB
Package shapeRECTANGULAR
Package formFLANGE MOUNT
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Certification statusNot Qualified
Regulator typeFIXED/ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR
surface mountNO
technologyBIPOLAR
Terminal surfaceTin/Lead (Sn/Pb) - with Nickel (Ni) barrie
Terminal formTHROUGH-HOLE
Terminal pitch1.27 mm
Terminal locationZIG-ZAG
Maximum time at peak reflow temperatureNOT SPECIFIED
Maximum voltage tolerance1%
LT1581/LT1581-2.5
10A, Very Low
Dropout Regulators
FEATURES
s
s
s
s
s
s
DESCRIPTION
The LT
®
1581 is a 10A low dropout regulator designed to
power the new generation of microprocessors. The drop-
out voltage of this device is 100mV at light loads rising to
just 430mV at 10A. To achieve this dropout a second low
current input voltage 1V greater than the output voltage is
required. The device can also be used as a single supply
device where dropout is comparable to an LT1584.
Several other new features have been added to the LT1581.
A remote SENSE pin is brought out. This feature virtually
eliminates output voltage variations due to load changes.
Typical load regulation for a load current step of 100mA to
10A, measured at the SENSE pin, is less than 1mV.
The LT1581 has fast transient response, equal to the
LT1584. On fixed voltage devices, the ADJUST pin is
brought out. A small capacitor on the ADJUST pin further
improves transient response.
This device is ideal for generating processor supplies of
2V to 3V on motherboards where both 5V and 3.3V
supplies are available.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Pentium is a registered trademark of Intel Corporation.
PowerPC is a trademark of IBM Corporation.
Low Dropout, 430mV at 10A Output Current
Fast Transient Response
Remote Sense
1mV Load Regulation
Fixed 2.5V Output and Adjustable Output
No Supply Sequencing Problems in
Dual Supply Mode
APPLICATIONS
s
s
s
s
s
s
Microprocessor Supplies
Post Regulators for Switching Supplies
High Current Regulators
5V to 3.XXV for Pentium
®
Processors Operating
at 90MHz to 166MHz and Beyond
3.3V to 2.9V for Portable Pentium Processor
PowerPC
TM
Series Power Supplies
TYPICAL APPLICATION
2.5V Microprocessor Supply
0.8
POWER
OUTPUT
2.5V/10A
Dropout Voltage –
Minimum Power Voltage
INDICATES GUARANTEED TEST POINTS
MINIMUM POWER VOLTAGE (V)
(V
POWER
– V
OUT
) (V)
3.3V
10A
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
1
2
3 4 5 6 7 8
OUTPUT CURRENT (A)
9
10
T
J
= 25°C
T
J
= 125°C
DATA SHEET LIMIT
+
330µF
OS-CON
+
LT1581-2.5
100µF TANT
AVX TPS
×
7
5V
0.2A
CONTROL
SENSE
ADJ
0.1µF
1581 TA01
+
10µF
TANT
GND
U
U
U
1581 G03
1

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