LINEAR LT1584 LT1585 LT1587 DATA SHEET
Summary
Designed for demanding microprocessor applications, these high-current low-dropout linear regulators provide stable and dependable regulated power for critical components. Offering fixed or adjustable outputs between 2.5V and 3.6V with up to 7A capacity, they feature fast transient response and robust over-load protection required by systems like Pentium and PowerPC processors. The manual provides detailed electrical specifications, operational guides, and stability requirements necessary for implementing reliable power solutions in challenging electronic designs.
Page 1 Text Content
LT1584/LT1585/LT1587 7A, 4.6A, 3A Low Dropout Fast Response Positive Regulators Adjustable and Fixed
FEATURES DESCRIPTION Fast Transient Response The LT®1584/LT1585/LT1587 are low dropout three- Guaranteed Dropout Voltage at Multiple Currents terminal regulators with 7A, 4.6A and 3A output current Load Regulation: 0.05% Typ capability, respectively. Design has been optimized for low Trimmed Current Limit voltage applications where transient response and mini- On-Chip Thermal Limiting mum input voltage are critical. Similar to the LT1083/4/5 Standard 3-Pin Power Package family, it has lower dropout voltage and faster transient response. These improvements make it ideal for low volt- APPLICATIONS age microprocessor applications requiring a regulated 2.5V to 3.6V output with an input supply below 7V.
Pentium TM Processor Supplies
Current limit is trimmed to ensure specified output current
Power PCTM Supplies IN PU T/ OU TP UT IF FE RE NT IA (V
and controlled short-circuit current. On-chip thermal lim-
Other 2.5V to 3.6V Microprocessor Supplies
iting provides protection against any combination of over-
Low Voltage Logic Supplies
load that would create excessive junction temperatures.
Battery-Powered Circuitry Post Regulator for Switching Supply The LT1585/LT1587 are available in both the through-hole
and surface mount versions of the industry standard 3-pin
LT1585/7CM, LT1584/5/7CT Adjustable
TO-220 power package. The LT1584 is available in the
LT1585/7CM-3.3, LT1584/5/7CT-3.3 3.3V Fixed
through-hole 3-pin TO-220 power package.
LT1585CM-3.38, LT1584/5CT-3.38 3.38V Fixed
, LTC and LT are registered trademarks of Linear Technology Corporation.
LT1585/7CM-3.45, LT1584/5/7CT-3.45 3.45V Fixed
Pentium is a trademark of Intel Corporation. Power PC is a trademark of IBM Corporation.
LT1585/7CM-3.6, LT1584/5/7CT-3.6 3.6V Fixed
TYPICAL APPLICATION Dropout Voltage vs Output Current
1.5 3.3V, 7A, 4.6A, 3A Regulator 1.4 1.3
LT1584-3.3
VIN ≥ 4.75V LT1585-3.3
LT1587-3.3 1.1
10µF SOLID 1.0
TANTALUM
* REQUIRED FOR STABILITY LT1584: C2 = 22µF, 0.7
1585 TA01
LT1585/LT1587: C2 = 10µF
NOTE: MICROPROCESSOR APPLICATIONS WITH LOAD TRANSIENTS OF 3.8A REQUIRE
OUTPUT DECOUPLING CAPACITANCE > 1300µF ON FIXED VOLTAGE PARTS TO ACHIEVE 0.5
IFULL LOAD
< 50m V OF DEVIATION FROM NOMINAL OUTPUT. CONSULT FACTORY FOR DETAILS
OUTPUT CURRENT (A)
1585 TA02
Page Summary Contents For LINEAR LT1584 LT1585 LT1587 DATA SHEET
Manual Details
| Brand | Linear |
|---|---|
| Pages | 12 |
| File Size | 276.91 KB |
| Published | June 15, 2026 |
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Frequently Asked Questions
What output current do the LT1584, LT1585, and LT1587 support?
LT1584 supports 7A, LT1585 supports 4.6A, and LT1587 supports 3A output current.
What packages are available for the LT1585?
It comes in 3-pin TO-220 and 3-lead plastic DD PAK packages, both through-hole and surface mount.
What is the max input voltage for these regulators?
The absolute maximum input voltage is 7V.
What output voltages are available for fixed versions?
Fixed versions offer 3.3V, 3.38V, 3.45V, and 3.6V output options.