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The ADP7104ACPZ is a CMOS, low dropout linear regulator with a maximum output current of 500 mA from a 3.3 V to 20 V supply, a high input voltage LDO for regulating high-performance analogue and mixed-signal circuits from 19 V to 1.22 V supplies. The device's advanced proprietary architecture provides high supply rejection, low noise characteristics, and excellent line and load transient response performance with a small 1 μF ceramic output capacitor.

The ADP7104ACPZ is available in seven fixed output voltage options and an adjustable output model that regulates the output voltage to 1.22 V to VIN - VDO with an external feedback divider.

The ADP7104ACPZ output noise voltage is 15 μV rms and is independent of output voltage. These devices have a ‘power good’ digital output pin that allows the power system monitor to check for proper output voltage. A user-programmable precision undervoltage blocking feature allows easy control of the timing of multiple power supplies.

Characteristics

Input voltage range: 3.3 V to 20 V

Maximum output current: 500 mA

Low noise: 15 μV rms (fixed output type)

PSRR performance: 60 dB (10 kHz, VOUT = 3.3 V)

Reverse current protection

Low dropout voltage: 350 mV (500 mA)

Initial accuracy: ±0.8 per cent

Accuracy over full line, load and temperature range

-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 (500 mA load)

Low shutdown current: <40 μA (at VIN = 12 V), stable operation with small 1 μF ceramic output capacitors

Seven 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 voltage range: 1.22 V to VIN - VDO

Return current limiting and thermal overload protection

User-programmable precision UVLO/enable function

Power good indication

Applications

Adaptation to noise-sensitive applications: ADCs, DAC circuits, precision amplifiers, high-frequency oscillators, clocks and PLLs

Communications and infrastructure

Medical and healthcare

Industrial and instrumentation

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