MIC4680BM-5.0

The MIC4680BM-5.0 is one member of the MIC4680 series.MIC4680BM-5.0 has the following features including (1)SO-8 package with up to 1.3A output current;(2)only 4 external components required;(3)internally compensated with fast transient respon;(4)wide 4V to 34V operating input voltage range;(5)less than 2A typical shutdown-mode current.

The MIC4680 SuperSwitcher™ is an easy-to-use fixed or adjustable output voltage step-down (buck) switch-mode voltage regulator. The 200kHz MIC4680 achieves up to 1.3A of continuous output current over a wide input range in a 8-lead SOP (small outline package).The MIC4680 is available in 3.3V and 5V fixed output versions or adjustable output down to 1.25V.The MIC4680 has an input voltage range of 4V to 34V, with excellent line, load, and transient response. The regulator performs cycle-by-cycle current limiting and thermal shutdown for protection under fault conditions. In shutdown mode, the regulator draws less than 2A of standby current.The MIC4680 SuperSwitcher™ regulator requires a minimum number of external components and can operate using a standard series of inductors and capacitors. Frequency compensation is provided internally for fast transient response and ease of use.

The MIC4680 SuperSwitcher features the power-SOP-8.This package has a standard 8-lead small-outline package profile but with much higher power dissipation than a standard SOP-8. The MIC4680 SuperSwitcher is the first dc-to-dc converter to take full advantage of this package.The reason that the power SOP-8 has higher power dissipation(lower thermal resistance) is that pins 5 though 8 and the die-attach paddle are a single piece of metal. The die is attached to the paddle with thermally conductive adhesive.This provides a low thermal resistance path from the junctionof the die to the ground pins. This design significantly improves package power dissipation by allowing excellent heat transfer through the ground leads to the printed circuit board.Layout is very important when designing any switching regulator.Rapidly changing switching currents through the printed circuit board traces and stray inductance can generate voltage transients which can cause problems.