ADI ADP1740ACPZ-1.2-R7

The ADP1740/ADP1741 are low dropout (LDO) CMOS linear regulators that operate from a 1.6 V to 3.6 V supply and deliver up to 2 A of output current. These low V_IN/V_OUT 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. Built on an advanced proprietary architecture, the ADP1740/ADP1741 deliver high PSRR and low noise, achieving excellent line and load transient response with a single compact 4.7 μF ceramic output capacitor.

The ADP1740 offers seven fixed output voltage options. The ADP1741 is the adjustable version, with output voltage programmable from 0.75 V to 3.3 V via an external resistor divider. The ADP1740/ADP1741 support an external soft-start capacitor for programmable startup control. These devices feature a power-good digital output pin, allowing a power system monitor to verify that the output voltage is within regulation.

The ADP1740/ADP1741 are available in a compact 16-lead, 4 mm × 4 mm LFCSP, combining a small footprint with excellent thermal performance for thin, space-constrained applications requiring up to 2 A output current.

• Maximum output current: 2 A
• Input voltage range: 1.6 V to 3.6 V
• Low shutdown current: 2 μA
• Low dropout: 160 mV at 2 A load current
• 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 (ADP1740)
• Soft-start with adjustable output voltage option: 0.75 V to 3.3 V (ADP1741)
• High PSRR: 65 dB (1 kHz), 65 dB (10 kHz), 54 dB (100 kHz)
• 23 μW (RMS, 0.75 V output)
• Stable operation with small 4.7 μF ceramic output capacitor
• Excellent load and line transient response
• Current limiting and thermal overload protection
• Power-good indication
• Logic-controlled enable
• Reverse current protection

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