Features: Three-Terminal Adjustable Or Fixed Output
Guaranteed 1.2V Headroom At 3A (LX8587A)
Guaranteed 1.3V Headroom At 3A(LX8587)
Output Current Of 3A
Fast Transient Response
1% Voltage Reference Initial Accuracy
Output Short Circuit Protection
Built-In Thermal Shutdown
ApplicationPentium Processor Supplies
Power PC Supplies
Microprocessor Supplies
Low Voltage Logic Supplies
Post Regulator For Switching Supply
ASIC & Low Voltage Chipset Supplies
Graphics & Sound Cards
Processor I/O SupplyPinout
SpecificationsPower Dissipation................................................................................Internally Limited
Input Voltage............................................................................................................10V
Input to Output Voltage Differential..........................................................................10V
Maximum Output Current............................................................................................5A
Operating Junction Temperature
Plastic (P Package)...............................................................................................150°C
Storage Temperature Range.................................................................-65°C to 150°C
Lead Temperature (Soldering, 10 seconds)..........................................................300°CDescriptionThe LX8587/8587A series ICs are low dropout three-terminal positive regulators with a nominal 3A output current. Pen-tium® Processor and Power PCTM LX8587/8587A series appli-cations requiring fast transient response are ideally suited for this product family.
The LX8587A is guaranteed to have< 1.2V dropout at 3A and the LX8587< 1.3V at the same current, making them ideal to provide well-regulated out-puts of 2.5V to 3.6V using a 5V input supply. Fixed versions are also available and specified in the Available Options table below.
Current limit is trimmed above 3.1A to ensure adequate output of LX8587/8587A series current and con-trolled short-circuit current. On-chip thermal limiting provides protection against any combination of overload con-ditions that would create excessive junc-tion temperatures.
The LX8587/87A family of products are available in both TO-220 through-hole as well as TO-263 surface-mount pack-ages. For higher current applications,see the LX8585 and LX8584 data sheets.
8587A-xx Data Sheet
