LX8383B-xx

Features:

THREE-TERMINAL ADJUSTABLE OR FIXED OUTPUT VOLTAGE
GUARANTEED < 1.3V HEADROOM AT 7.5A (LX8383A/8383B)
GUARANTEED < 1.5V HEADROOM AT 7.5A (LX8383)
OUTPUT CURRENT OF 7.5A MINIMUM
  0.015% LINE REGULATION
  0.15% LOAD REGULATION
  EVALUATION BOARD AVAILABLE: REQUEST LXE9001 EVALUATION KIT


Application

PENTIUM® PROCESSOR APPLICATIONS
HIGH EFFICIENCY LINEAR REGULATORS
POST REGULATORS FOR SWITCHING POWER SUPPLIES
BATTERY CHARGERS
CONSTANT CURRENT REGULATORS
CYRIX^® 6x86^TM
AMD-K5^TM


Pinout




Specifications

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


Description

The LX8383/8383A/LX8383B-xx series ICs are positive regulators designed to provide 7.5A output current. All internal circuitry is designed to operate down to a 1V input-to-output differential, so the LX8383/83A/83B can operate with greater efficiency than previously available devices.The dropout voltage for each product is fully specified as a function of load current.Dropout is guaranteed at a maximum of 1.3V for the LX8383A/LX8383B-xx and 1.5V for the LX8383, at maximum output current, decreasing at lower load currents.Fixed versions are also available and specified in the Available Options table below.The LX8383B offers a tighter voltage reference tolerance: 0.8% initial accuracy and
1% over line, load and temperature.The LX8383/83A have 1% initial accuracy and 2% over line, load and temperature.

The LX8383/83A/LX8383B-xx series devices are pin-compatible with earlier 3-terminal regulators, such as the 117 series products.While a 10F output capacitor is required on both input and output of these new devices, this capacitor is generally included in most regulator designs.

The LX8383/83A/LX8383B-xx series quiescent current flows into the load, thereby increasing efficiency. This feature contrasts with PNP regulators, where up to 10% of the output current is wasted as quiescent current. The LX8383I/8383AI is specified over the industrial temperature range of -25°C to +125°C and the LX8383C/8383AC/8383BC is specified over the commercial range of 0°C to +125°C.