ADP7104ARDZ-2.5-R7

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1. DESCRIPTION

The ADP7104ARDZ-2.5-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 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.

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 foldback current limit and thermal overload protection

  13. User programmable precision UVLO/enable power good indicator 8-pin LFCSP and 8-pin 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

4. Pin configuration

5. Pin Function Descriptions

6. OUTLINE DIMENSIONS