ADP1755ACPZ-R7

The ADP1754/ADP1755 are low dropout (LDO) CMOS linear regulators that operate from a 1.6 V to 3.6 V supply and deliver output currents up to 1.2 A. These low VIN/VOUT LDOs are ideal regulators for nanometer-geometry FPGAs powered from 2.5 V down to 1.8 V I/O rails while providing core voltages as low as 0.75 V. The ADP1754/ADP1755 employ an advanced proprietary architecture to deliver high PSRR and low noise, while achieving excellent line and load transient response performance using only a single small 4.7 μF ceramic output capacitor. The ADP1754 offers seven fixed output voltage options. The ADP1755 offers an adjustable version that can be set between 0.75 V and 3.3 V using an external resistor divider. The ADP1754/ADP1755 accept an external soft-start capacitor to program the startup sequence. These devices feature a power-good digital output pin, allowing a power system monitor to verify that the output voltage is within regulation. The ADP1754/ADP1755 are available in a compact 16-lead, 4 mm × 4 mm LFCSP that provides excellent thermal performance, making them suitable for slim, small form factor applications requiring output currents up to 1.2 A.

Applications

• Computer servers
• Memory devices
• Telecom equipment
• Network equipment
• DSP/FPGA/microprocessor power supplies
• Instrumentation/data acquisition systems

Key features

• Maximum output current: 1.2 A
• Input voltage range: 1.6 V to 3.6 V
• Low shutdown current: < 2 μA
• Ultra-low dropout: 105 mV (1.2 A load)
• Initial accuracy: ±1%
• Accuracy over full line, load, and temperature range: ±2%
• Soft-start with 7 fixed output voltage options: 0.75 V to 2.5 V (ADP1754)
• Soft-start with adjustable output voltage option: 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, 0.75 V output)
• Stable operation with 4.7 μF small ceramic output capacitor
• Excellent load and line transient response
• Current limiting and thermal overload protection
• Power good indication
• Logic-controlled enable
• Reverse current protection