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Efficient and Tiny Power IC Products Extend Battery Life and Functionality >>
Reduce BOM Costs with DC-to-DC Boost Controller >>
Low Dropout Regulators Deliver Accuracy and Reliability >>
Thermal Management IC Simplifies Electronic System Designs >>
DC-to-DC Controller Delivers 14 V Input Range at a 40% Cost Saving >>
High Efficiency Step-Down DC-to-DC Converters >>
CPU Power Controllers Optimized for Next Generation Applications >>
High Efficiency Controller IC for Switch Mode Li-ion Battery Chargers >>
New Quad Channel Voltage Monitor/Sequencer for Communications Applications >>
Hot Swap with Integrated Digital Power Monitors Safeguard Line Cards >>
Dual Comparators with Integrated Reference and Programmable Hysterersis >>
Precise Temperature Control Independent of the Microprocessor >>
Low Voltage, High Accuracy Microprocessor Supervisory Circuit >>
All prices in this bulletin are in USD in quantities greater than 1000 (unless otherwise noted), recommended lowest grade resale, FOB U.S.A.
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Reduce BOM Costs and Enhance Design Flexibility with New DC-to-DC Boost Controller
 he ADP1621 is a flexible boost controller configurable in boost, flyback, SEPIC, and forward topologies that are either isolated or nonisolated. It drives an n-channel MOSFET to convert input voltage to a higher output voltage. The ADP1621 delivers a fixed frequency, pulse-width modulation (PWM) current mode step-up control that reduces BOM by eliminating the need for a current sense power resistor by measuring the voltage drop across the on resistance of the n-channel MOSFET for voltages up to 30 V and above. A sense resistor can be added between the source of the MOSFET and the CS pin to improve accuracy. Available in a 10-lead MSOP, the ADP1621 delivers a switching frequency set using an external resistor over a range of 100 kHz to 1.5 MHz.
• Up to 92% efficiency with no sense resistor
• Initial accuracy: ±1%
• Input voltage : 2.9 V to 5.5 V
• Shutdown current: 10 µA
• Current limit and thermal overload protection
• Package: 3 mm × 3 mm 10-lead MSOP
For more information on ADI's complete portfolio of switching controllers, visit www.analog.com/controllers.
Family of Compact Low Dropout Regulators Delivers Accuracy, Reliability, and Functionality in Industry-Standard Pinout Packages
his ADP17xx family of low dropout regulators offers superior accuracy in a variety of compact, standard pinout packages, including a 5-lead TSOT, an 8-lead thermally enhanced MSOP, and an 8-lead, 3 mm × 3 mm LFCSP. These devices are ideal for power regulation at the load to a 1% accuracy range. Additional features include on-chip voltage tracking functionality that eliminates the need for separate supervisory/sequencer ICs, an integrated feedback network for minimal external component count, and a low noise option. Input voltages in the 2.5 V to 5.5 V range are stepped-down to 16 fixed-output options in the range of 0.8 V to 3.3 V, at four available output current limited load ranges from 150 mA to 1 A. Differentiating itself from the rest of the family, the ADP1720 has a 28 V input range suitable for powering always-on equipment with a very low 25 µA quiescent current.
• Accuracy: ±1% initial
• From 30 µA quiescent
current
• Ultralow dropout at rated
load current
• Noise: 40 µV rms
• Short-circuit protected
• Thermal shutdown
• Enable control pin
• On-chip voltage tracking
• Soft start
For more information on ADI's complete portfolio of linear regulators, visit www.analog.com/LDO.
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