LX8385A-xx

Features:

Three-Terminal Adjustable Or Fixed Output Voltage
Guaranteed 1% Voltage Reference Accuracy Over Line, Load And Temperature (LX8385B)
Guaranteed < 1.5V Headroom At 3A (LX8385)
Guaranteed < 1.3V Headroom At 3A (LX8385A/8385B)
Output Current Of 3A Minimum
  0.015% Line Regulation
  0.1% Load Regulation


Application

High Efficiency Linear Regulators
Post Regulators For Switching Power Supplies
Battery Chargers
Constant Current Regulators
Graphics & Standard Supplies
Processor I/O Supply
Low Voltage Memory & Chipset Supplies


Pinout




Specifications

Power Dissipation ........................................................................... Internally Limited
Input Voltage........................................................................................................ 10V
Input to Output Voltage Differential ..................................................................... 10V
Operating Junction Temperature
    Plastic (P, DD & DL Packages)....................................................................... 150°C
Storage Temperature Range ............................................................ -65°C to 150°C
Lead Temperature (Soldering, 10 seconds) ..................................................... 300°C


Description

The LX8385/LX8385A-xx/8385B series ICs are positive regulators designed to provide 3A output current. Each regulator yields higher efficiency than currently available devices with all internal circuitry designed to operate down to a 1V input-to-outputdifferential.In these products, the dropout voltage is fully specified as a function of load current. The LX8385's dropout is guaranteed at a maximum of 1.5V at maximum output current, decreasing at lower load currents. The LX8385A/85B have a maximum dropout voltage of 1.3V.

The LX8385B offers a tighter voltage reference tolerance: ±1.0% over line, load and temperature, with 0.8% initial accuracy.The LX8385/LX8385A-xx have 1.0% initial accuracy, with 2% over line, load and temperature.

The LX8385/LX8385A-xx/85B series devices are pin-compatible with earlier 3-terminal regulators, such as 117 series products.While a 10F output capacitor is required on both input and output of these new devices, this is generally included in most regulator designs.

The quiescent current of the LX8385/LX8385A-xx/85B series products flows into the load, increasing efficiency. This feature contrasts with PNP regulator designs,where up to 10% of the output current is wasted as quiescent current.

The LX8385A-xx is rated for -25°C to +125°C applications, and the LX8385-xxC/8385B-xxC is rated for 0°C to +125°C applications.