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Regulator with 100mV dropout voltage while delivering 1.5A

Posted: 10 May 2005 ?? ?Print Version ?Bookmark and Share

Keywords:linear technology? very low dropout linear regulator? linear regulator? vldo linear regulator? ltc3026?

Linear Technology Corp. released a 1.5A very low dropout (VLDO) linear regulator with input voltage capability down to 1.14V.

Featuring adjustable ultra-low output voltage operation from 0.4V to 2.6V, the LTC3026 also maintains low dropout voltage of 100mV while delivering up to 1.5A of output current. To allow operation at low input voltages, this new product includes an integrated boost converter that provides the necessary headroom for the internal LDO circuitry. This feature ensures users the flexibility of lower input voltage capability if an external 5V rail is not available in the system, explained Linear Tech.

The LTC3026's high supply rejection capability enables it to be a highly effective post-regulator for switching power supplies. Other applications include high-efficiency linear regulation from low input voltage 2.5V/1.8V/1.5V rails, plus powering low-voltage, high-current digital ICs such as microcontrollers, microprocessors, PLDs/FPGAs and DSPs.

The LTC3026 regulator optimizes stability and transient response with low ESR, ceramic output capacitors as small as 10?F. Its internal protection circuitry includes soft-start, current limiting, thermal limiting, and reverse-current protection. Its shutdown disconnect feature disconnects both VIN and VBST from the output load in shutdown.

The LTC3026EDD and LTC3026EMSE are available from stock in the 10-lead, 3-by-3-by-0.75mm DFN package and 10-lead MSOP package, respectively. Both packages offer thermally efficient, highly compact solution footprints. For 1,000-piece orders, pricing starts at $2.20 each.

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