ADP1754/ADP1755 Low Dropout (LDO) Regulators

By Analog Devices Inc 31

ADP1754/ADP1755 Low Dropout (LDO) Regulators

Power by Linear ™ / Analog Devices’ ADP1754 and ADP1755 are low dropout (LDO) linear regulators. These regulators 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 powering core voltages down to 0.75 V. Using an advanced proprietary architecture, they provide high power supply rejection, low noise, and achieve excellent line and load transient response with a small 4.7 µF ceramic output capacitor.

The ADP1754 is available in seven fixed output voltage options. The ADP1755 is available in an adjustable version, which allows output voltages that range from 0.75 V to 3.0 V via an external divider. The ADP1754 and ADP1755 allow an external soft start capacitor to be connected to program the start-up. A power good output allows power system monitors to digitally check the health of the output power rail voltage.

The ADP1754 and ADP1755 are available in a 16-lead LFCSP, making them compact solutions, but also providing excellent thermal performance for applications requiring up to 1.2 A of output current in a small, low-profile footprint.

Features
  • Input voltage range: 1.6 V to 3.6 V
  • Maximum output current: 1.2 A
  • 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%
  • Seven 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 (see data sheet for details)
  • 23 μVRMS at 0.75 V output
  • Stable with small 4.7 μF ceramic output capacitor
  • Excellent load and line transient response

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