Maxim Announces 25A Step-Down Regulator That Fits In Tiny 8 x 8mm TQFN
Maxim Integrated Products introduced the MAX8655, said to be the first switching, step-down regulator to incorporate the MOSFETs and to shrink regulator packaging into the industry’s smallest footprint – an 8 x 8 x 0.8mm (height) TQFN. This device provides output currents of up to 25A. A wide 4.5V to 25V input-voltage range allows for internal bus architecture (IBA) applications, where input voltage can have a two-to-one variation. Described as a breakthrough in power density, output current, and size, the MAX8655 is well suited for any application in which space, power, and versatility are crucial.
Maxim’s new proprietary PowerMind™ products, which include the new MAX8655 regulator, are claimed to solve the space constraint issue and offer both versatility and simplicity of use. Though packaged in a tiny TQFN, the MAX8655 does not compromise control features. Built-in MOSFETs incorporate all the critical inductances and eliminate undesired parasitic board inductances. By integrating discrete MOSFETs, Maxim claims that the MAX8655 not only reduces space, but also dramatically lowers the generated EMI and virtually assures first-pass design.
Peak current-mode control at up to 1.2MHz switching simplifies compensation, allows for all types of output capacitors, and inherently provides feed-forward for optimum line regulation. Together with this peak current-mode-control topology, accurate current sensing enables paralleling in multiphase fashion. As a result, higher output currents are achieved and smaller output-filter components are required.
Designed with powerful programmable capabilities, the MAX8655 is highly flexible and versatile. Programmable features include slope compensation, OVP threshold, short-circuit protection, frequencies, and current limit (either latchoff or current fold-back with autorecovery overcurrent protection). Sync input/output and thermal protection are standard features that assure safe operation under all conditions.
Pricing for the MAX8655 starts at $3.78 (10,000-up, FOB USA).
