Alternative Parts

  • ADP7105

    20 V, 500 mA, Low Noise LDO Regulator with Soft Start

  • LT1763

    500mA, Low Noise, LDO Micropower Regulators


Features and Benefits

  • Input voltage range: 3.3 V to 20 V
  • Maximum output current: 500 mA
  • Low Noise: 15 μV rms for fixed output versions
  • PSRR Performance of 60 dB at 10 kHz, VOUT = 3.3 V
  • Reverse current protection
  • Low dropout voltage: 350 mV at 500 mA
  • Initial accuracy: ±0.8%
  • Accuracy over line, load, and temperature
    • −2% to +1%, TJ = −40°C to +125°C
    • −1.25% to +1%, TJ = 0°C to +85°C
  • Low quiescent current (VIN = 5 V), IGND = 900 μA with 500 mA load
  • Low shutdown current: <40 μA at VIN = 12 V, stable with small 1 μF ceramic output capacitor
  • 7 fixed output voltage options: 1.5 V, 1.8 V, 2.5 V, 3 V, 3.3 V, 5 V, and 9 V
  • Adjustable output from 1.22 V to VIN − VDO
  • Foldback current limit and thermal overload protection
  • User programmable precision UVLO/enable
  • Power-good indicator
  • 8-lead LFCSP and 8-lead SOIC packages

Product Details

The ADP7104 is a CMOS, low dropout linear regulator that operates from 3.3 V to 20 V and provides up to 500 mA of output current. This high input voltage LDO is ideal for regulation of high performance analog and mixed signal circuits operating from 19 V to 1.22 V rails. Using an advanced proprietary architecture, it provides high power supply rejection, low noise, and achieves excellent line and load transient response with just a small 1 μF ceramic output capacitor.

The ADP7104 is available in seven fixed output voltage options and an adjustable version, which allows output voltages that range from 1.22 V to VIN − VDO via an external feedback divider.

The ADP7104 output noise voltage is 15 μV rms and is independent of the output voltage. A digital power-good output allows power system monitors to check the health of the output voltage. A user programmable precision undervoltage lockout function facilitates sequencing of multiple power supplies.

The ADP7104 is available in 8-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC packages. The LFCSP offers a very compact solution and also provides excellent thermal performance for applications requiring up to 500 mA of output current in a small, low-profile footprint.


  • Regulation to noise sensitive applications: ADC, DAC circuits, precision amplifiers, high frequency oscillators, clocks, and PLLs
  • Communications and infrastructure
  • Medical and healthcare
  • Industrial and instrumentation

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (14)

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.