Full-featured regulators optimise power-supply design
The PowerWise® family of synchronous buck regulators, from National Semiconductor, provide high-efficiency DC-DC power conversion for point-of-load applications.
Synchronous operation with integrated FETs enhance efficiency at high load currents, and a diode emulation mode provides high efficiency at light loads. As well as integrating FETs, the 16-lead TSSOP package features a full range of features and options that enable enhanced system reliability and optimised power solutions.
Sync-in allows synchronisation of the device to an external clock source and sync-out provides for current sharing or multi-phase operation. A high-accuracy current limit with over-voltage and under-voltage protection provides enhanced system reliability. External compensation allows optimisation for the required output capacitor and inductor.
The 16-lead TSSOP package, with integrated FET, saves board space by requiring only a 1µH inductor. When powering multiple points-of-load, precision enable allows different PowerWise devices to be sequenced to create a small, efficient and flexible DC-DC power conversion. The PowerWise® family of low-voltage devices is available with an input voltage range from 2.95V to 5.5V, and supports up to 5A loads. The LM20242 PowerWise® device offers an input voltage range from 4.5V to 36V, and supports up to 2A loads from an eTSSOP-20 package.
FEATURES
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- Precision enable and tracking for sequencing of multiple devices
- External soft-start
- Fixed and adjustable switching frequency for optimisation
- High-accuracy over-voltage, under-voltage and over-current protection
- eTSSOP-16 package
- Clock synchronisation in and out
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APPLICATIONS
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- POL regulation from a 4.5V to 36V bus
- DSPs, FPGAs, ASICs and microprocessors
- Communications infrastructure and automotive applications
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Development board LM20145EVAL is available to members of the Future Board Club.
To apply for the development board, and membership of the Board Club, go to
www.my-boardclub.com/manf-offers.htm
This offer is free and subject to qualification. |
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