ADP7104ARDZ-R7

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1. DESCRIPTION

The ADP7104ARDZ-R7 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 ADP7104ARDZ-R7 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 ADP7104ARDZ-R7 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.

2. FEATURES

    1. Input voltage range: 3.3 V to 20 V

    2. Maximum output current: 500 mA

    3. Low noise: 15 μV rms for fixed output versions

    4. PSRR performance of 60 dB at 10 kHz, VOUT = 3.3 V

    5. Reverse current protection

    6. Low dropout voltage: 350 mV at 500 mA

    7. Initial accuracy: ±0.8%

    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

    9. Low quiescent current (VIN = 5 V), IGND = 900 μA with 500 mA load

  10. Low shutdown current: <40 μA at VIN = 12 V, stable with small 1 μF ceramic output capacitor

  11. 7 fixed output voltage options: 1.5 V, 1.8 V, 2.5 V, 3 V, 3.3 V, 5 V, and 9 V

  12. Adjustable output from 1.22 V to VIN − VDO

  13. Foldback current limit and thermal overload protection

  14. User programmable precision UVLO/enable

  15. Power-good indicator

  16. 8-lead LFCSP and 8-lead SOIC packages 

3. APPLICATIONS

    1. Regulation to noise sensitive applications: ADC, DAC circuits, precision amplifiers, high frequency oscillators, clocks, and PLLs

    2. Communications and infrastructure

    3. Medical and healthcare

    4. Industrial and instrumentation