LX8587A

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


Application

Pentium 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 Supply


Pinout




Specifications

Power Dissipation ......................................................................................................... Internally Limited
Input Voltage ................................................................................................................ 10V
Input to Output Voltage Differential............................................................................... 10V
Maximum Output Current............................................................................................... 5A
Maximum Operating Junction Temperature ................................................................... 150°C
Storage Temperature Range.......................................................................................... -65°C to 150°C
Peak Package Solder Reflow Temp. (40 seconds max. exposure) ................................. 260°C (+0,-5)

Note:
Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal.


Description

The LX8587/LX8587A Series ICs are positive regulators designed to provide 3A output current. Pentium® Processor and Power PC™ applications requiring fast transient response are ideally suited for this product family.

The LX8587A is guaranteed to have <1.2 dropout at 3A and the LX8587 < 1.3V at the same current, making them ideal to provide well-regulated outputs 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 about 3.1A to ensure adequate output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload conditions that would create excessive junction temperatures.The LX8587/LX8587A family of products are available in the TO-220 through hole, the TO-263 surface-mount, and the TO-252 surface-mount packages. For higher current applications see the LX8585 and the LX8584 data sheets.