Alternative Parts
Overview
Features and Benefits
- Maximum output current: 2 A
- Input voltage range: 1.6 V to 3.6 V
- Low shutdown current: 2 μA
- Low dropout voltage: 160 mV @ 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 (ADP1740)
- Adjustable output voltage options with soft start: 0.75 V to 3.3 V (ADP1741)
- 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
- Please see data sheet for additional features
Product Details
The ADP1740/ADP1741 are CMOS, low dropout linear regulators that operate from 1.6 V to 3.6 V and provide up to 2 A of output current. These low VIN / VOUT LDOs are ideal for regulation of nanometer FPGA geometries operating from 2.5V down to 1.8V I/O rails, and powering core voltages down to 0.75V. Using an advanced, proprietary architecture, the ADP1740/ADP1741 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.
The ADP1740 is available in seven fixed output voltage options. The ADP1741 is an adjustable version that allows output voltages ranging from 0.75 V to 3.3 V via an external divider. The ADP1740/ADP1741 allow an external soft start capacitor to be connected to program the startup. A digital power-good output allows power system monitors to check the health of the output voltage.
The ADP1740/ADP1741 are available in a 16-lead, 4 mm × 4 mm LFCSP, making them not only very compact solutions, but also providing excellent thermal performance for applications that require up to 2 A of output current in a small, low profile footprint..
Applications
- Server computers
- Memory components
- Telecommunications equipment
- Network equipment
- DSP/FPGA/microprocessor supplies
- Instrumentation equipment/data acquisition systems
Product Categories
Markets and Technologies
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (4)
Documentation
Application Notes (1)
Frequently Asked Questions (1)
Tools & Simulations
LTpowerCAD
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.
Design tools for the following parts are available in LTpowerCAD:
Design Tools
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
Reference Materials
Solutions Bulletins & Brochures (2)
Lowest Noise LDOs Enable Cutting Edge Signal Chain Performance
Technical Articles (6)
Analog Dialogue
Analog Dialogue
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
PCN-PDN Information
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.