Low Dropout Linear Regulator

Single Output LDO

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uP8801S

3A Ultra Low Dropout Linear Regulator

Datasheets PDF

General Description

The uP8801S is a 3A ultra low dropout linear regulator specifically designed for motherboard, notebook and graphic card applications. This device works with dual supplies, a control input for the control circuitry and a power input as low as 1.2V for providing current to output. The uP8801S delivers high-current and ultra-low-drop output voltage as low as 0.8V for applications where VOUT is very close to VIN.

The uP8801S features comprehensive control and protection functions: a power on reset (POR) circuit for monitoring both control and power inputs for proper operation; an EN input for enabling or disabling the device, a power OK with time delay for indicating the output voltage status, a foldback current limit function, and a thermal shutdown function.

The uP8801S is available in PSOP – 8L or WDFN3x3 – 10L packages with very low thermal resistance.

Pin Configuration & Typical Application Circuit


PSOP-8L

WDFN3x3-10L

Feature

  • Works with 1.2V~5.5V VIN
    • Adjustable Output Voltage, Down to 0.8V
    • 1.5% Initial Accuracy
    • Excellent Line and Load Regulation
  • 3A Guaranteed Output Current
    • 300mV @ 3A Dropout Voltage
  • Very Low On-Resistance
    • 100mΩ typical
  • VOUT Pull Low Resistance when Disabled
  • VOUT Power OK Signal
  • Fast Transient Response
  • Low External Component Count
  • Low Cost and Easy to Use
  • Over Current and Over Temperature Protection
  • RoHS Compliant and Halogen Free

Application

  • Desktop PCs, Notebooks, and Workstations
  • Graphic Cards
  • Low Voltage Logic Supplies
  • Microprocessor and Chipset Supplies
  • Split Plane Microprocessor Supplies
  • Advanced Graphics Cards Supplies
  • SoundCards and Auxiliary Power Supplies
  • SMPS Post Regulators