Overview

General Description

The MAX38911/MAX38912 are low-noise, high-PSRR PMOS linear regulators that deliver up to 500mA load current with only 11µVRMS of output noise from 10Hz to 100kHz.

The regulators are fully protected from damage by internal circuitry that provides programmable inrush current limiting, output overcurrent limiting, reverse current limiting, and thermal overload protection.

The MAX38911 is available in WLP and TDFN packages and are default factory preprogrammed to an output voltage of 1.8V. Custom fixed-output voltage levels in the range of 0.8V to 5.0V in 50mV steps are also available, see Ordering Information.

MAX38912 provides enhanced flexibility with adjustable output voltage in the range of 0.8V to 5.0V by using two external feedback resistors.

The MAX38911ANT is packaged in a 1.42mm x 0.83mm, 3 x 2, 6-bump, 0.4mm pitch WLP, while the MAX38911ATA and MAX38912ATA are packaged in a 8-pin, 2mm x 2mm TDFN.
Application Diagram

Benefits and Features
    • Delivers Wide, Flexible Operating Range
      • 1.7V to 5.5V Input Supply Range
      • 0.8V to 5.0V Output Voltage Range
      • 500mA Maximum Output Current
      • 24.3mV Dropout at 500mA Load and 5.0V Input Voltage
      • 19.2µA No-Load Supply Current in Low-Power Mode
      • 332µA Supply Current in Normal Mode
      • <1µA Shutdown Supply Current
    • Reduces Noise and Improves Accuracy
      • 11µVRMS Output Noise, 10Hz to 100kHz
      • 70dB PSRR at 10kHz, 250mA Load Current, and 300mV Input and Output Voltage Separation
      • ±1% DC Accuracy over Load, Line,
        and Temperature Variations
    • Enables Ease-of-Use and Robust Protection
      • Stable with 2µF (Minimum Effective) Output Capacitance
      • Programmable Soft-Start Rate
      • Overcurrent and Overtemperature Protection
      • Reverse-Current Protection
      • Power-OK Output
    • Reduces Size and Improves Reliability
      • 1.42mm x 0.83mm, 3 x 2, 6-Bump, 0.4mm Pitch WLP
      • 2mm x 2mm, 8-Pin TDFN Package
      • -40°C to +125°C Operating Temperature

    Ordering Information appears at end of data sheet
    Applications
      • Mobile Phones
      • Digital Camera and Audio Devices
      • Portable and Battery-Powered Equipment
      • High-Performance Sensors for Portable
      • Applications
      • IOT Sensors
      • Imaging and High-Frequency Sensors


      19-100886; Rev 1; 8/21