28 Aug '14, 5pm

Two-Phase, Synchronous Boost Regulator IC Delivers Up to 15 V via @PowerElecTech

Two-Phase, Synchronous Boost Regulator IC Delivers Up to 15 V via @PowerElecTech

One of the latest Linear Technology dc-to-dc converter ICs is the LTC3124, whose application circuit is shown in Fig. 1 . The regulator employs an external resistive voltage divider from VOUT to FB to SGND to program the output from 2.5 V to 15 V. When set for a 12 V output, it can deliver up to 1.5 A continuously from a 5 V input. Its 2.5 A per phase current limit, along with the ability to program output voltages up to 15 V, make the IC suitable for a variety of applications. The use of two phases equally spaced 180° apart, doubles output ripple frequency, and significantly reduces output capacitor ripple current. Although this architecture requires two inductors, rather than a single inductor, it has several important advantages: • Substantially lower peak inductor current allows the use of smaller, lower cost inductors. • Significantly reduced output ripple current min...

Full article: http://powerelectronics.com/dc-dc-converters/two-phase-sy...

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