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Step-down regulator delivers 800mA continuous output current

Posted: 12 Jan 2007     Print Version  Bookmark and Share

Keywords:Linear Technology  LTC3560  buck regulator  ThinSOT package  microcontrollers 

Linear Technology has announced the LTC3560, a high efficiency, 2.25MHz, synchronous buck regulator that delivers up to 800mA of continuous output current from a ThinSOT package. Using a constant frequency and current mode architecture, the LTC3560 operates from an input voltage range of 2.5V to 5.5V, making it suitable for single cell Li-Ion, or multi-cell alkaline/NiCad/NiMH applications.

It can generate output voltages as low as 0.6V, enabling it to power the latest generation of low voltage DSPs and microcontrollers (MCUs). Its 2.25MHz switching frequency enables the use of tiny, low cost ceramic capacitors and inductors less than 1mm in height, providing a compact solution footprint for handheld applications.

The LTC3560 uses internal switches with an RDS(ON) of only 0.21Ω (N-Channel) and 0.23Ω (P-Channel) to deliver efficiencies as high as 95 per cent. It also utilises low dropout 100 per cent duty cycle operation to allow output voltages equal to VIN, further extending battery run-time. The LTC3560 utilises low ripple burst mode operation to offer only 16µA no load quiescent current. If the application is noise sensitive the burst mode function can be disabled, using a lower noise pulse-skipping mode which still offers only 200µA of quiescent current. In either mode, it maintains a shutdown current of less than 1µA, further maximising battery run time. The LTC3560 can also be synchronised to an external clock. Other features include ±two per cent output voltage accuracy and over-temperature protection.

The LTC3560ES6 is available from stock in a 6-lead ThinSOT package. Pricing starts at Rs.86.11 ($1.90) each in 1,000-piece quantities.

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Related Datasheets
Part Number Description Category
LTC3560 2.25MHz, 800mA Synchronous Step-Down Regulator in ThinSOT ICs, Interface



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