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GENERAL DESCRIPTION

The ADP1754/ADP1755 are low dropout (LDO) CMOS linear regulators that operate from 1.6 V to 3.6 V and provide up to 1.2 A of output current. These low VIN/VOUT LDOs are ideal for regulation of nanometer FPGA geometries operating from 2.5 V down to 1.8 V I/O rails, and for powering core voltages down to 0.75 V. Using an advanced proprietary architecture, the ADP1754/

ADP1755 provide high power supply rejection ratio (PSRR) and low noise, and achieve excellent line and load transient response with only a small 4.7 μF ceramic output capacitor.

FEATURES

Maximum output current: 1.2 A

Input voltage range: 1.6 V to 3.6 V

Low shutdown current: <2 μA

Very low dropout voltage: 105 mV @ 1.2 A load

Initial accuracy: ±1

Accuracy over line, load, and temperature: ±2

7 fixed output voltage options with soft start 0.75 V to 2.5 V (ADP1754)

Adjustable output voltage option with soft start 0.75 V to 3.3 V (ADP1755)

High PSRR

65 dB @ 1 kHz

65 dB @ 10 kHz

54 dB @ 100 kHz

23 μV rms at 0.75 V output

Stable with small 4.7 μF ceramic output capacitor

Excellent load and line transient response

Current-limit and thermal overload protection

Power-good indicator

Logic-controlled enable

Reverse current protection