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ADP1740/ADP1741: 2 A, Low VIN, Low Dropout Linear Regulator Data Sheet (Rev. H)3/5/2008PDF777 kB
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 (ADP1740): 0.75 V to 2.5 V
- Adjustable output voltage options with soft start (ADP1741): 0.75 V to 3.3 V
- 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
- 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, they provide high power supply rejection, low noise, and achieve excellent line and load transient response with just 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 (6)
Documentation & Resources
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AN-1329: Noise Reduction Network for Adjustable Low Dropout Regulators (Rev. 0)12/5/2016PDF486 K
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AN-1072: How to Successfully Apply Low Dropout Regulators4/27/2010PDF105 kB
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FAQs7/26/2017
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Linear Low Dropout (LDO) Regulator Solutions4/17/2018PDF3 M
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Ultralow Noise, High Rejection Low Dropout Regulators11/18/2015PDF2 M
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Silent Switcher µModule Regulators Quietly Power GSPS Sampling ADCs in Half the Space11/2/2018
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Noise-Reduction Network for Adjustable-Output Low-Dropout Regulators3/1/2014 Analog Dialogue
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How to Successfully Apply Low-Dropout Regulators9/1/2009 Analog Dialogue
Tools & Simulations
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ADI Linear Regulator Design Tool and Parametric Search
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
Reference Designs (1)
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.