LT3021 - 500mA VLDO Operates Down to 0.2V from 0.9V Input

Jul 18 2005 - MILPITAS, CA
  • Linear Technology Corporation announces fixed low-output voltage options for the LT3021, the power industry's first 500mA VLDO (very low dropout regulator). It features input voltage capability as low as 1.4V for fixed output voltages down to 1.2V. Fixed 1.5V and 1.8V options are also offered. The LT3021's low input voltage capability is important for emerging applications using a 1.5V main rail that require output voltages down to 1.2V to drive low voltage microprocessor and microcontroller cores. The LT3021 maintains its 160mV dropout voltage up to 500mA of operating current, making it ideal for applications requiring a low VIN to VOUT differential. Additionally, it offers micropower operation with only 120uA of quiescent current and less than 3uA in shutdown, maximizing battery run time in handheld applications.

    The LT3021 regulator optimizes stability and transient response with low ESR, ceramic output capacitors as small as 3.3uF. Other LT3021 features include 0.05% line regulation and 0.2% load regulation. Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting with hysteresis and reverse-current protection. The LT3021 regulator is available in a low profile (0.75mm) 16-lead DFN 5mm × 5mm package with exposed pad, and an 8-lead SOIC package, both offering compact solution footprints.

    Both LT3021EDH-1.2/1.5/1.8 (16-lead DFN) and the LT3021ES8-1.2/1.5/1.8 (SOIC-8) are available from stock. 1,000-piece pricing starts at $2.25 each.

    Summary of Features: LT3021-1.2/1.5/1.8

    • VIN Range: 1.4V to 10V
    • Fixed Output Voltages: 1.2V, 1.5V, 1.8V
    • Dropout Voltage: 160mV
    • Output Current: 500mA
    • Stable with Low ESR, Ceramic Output Capacitors (3.3uF Minimum)
    • 0.2% Load Regulation from 0mA to 500mA
    • Quiescent Current: 120uA, ISD < 3uA
    • Current Limit Protection
    • Reverse-Battery Protection, No Reverse Current
    • 16-Lead DFN (5mm × 5mm × 0.75mm) Package
    • 8-Lead SOIC Package

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