Microchip MIC4680-3.3YM

Step-DownБак4V34V1.3A

Overview

The MIC4680-3.3YM SuperSwitcherTM is an easy-to-use fixed or adjustable output voltage step-down (buck) switch-mode voltage regulator. The 200kHz MIC4680-3.3YM achieves up to 1.3A of continuous output current over a wide input range in a 8-pin SOIC. The MIC4680-3.3YM is available in 3.3V and 5V fixed output versions or adjustable output down to 1.25V. The MIC4680-3.3YM 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 2uA of standby current. The MIC4680-3.3YM SuperSwitcherTM regulator requires a mini- mum 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 MIC4680-3.3YM is available in the 8-pin SOlC with a

· SOIC-8 package with up to 1.3A output current · All surface mount solution · Only 4 external components required · Fixed 200kHz operation ·3.3V,5V, and adjustable output versions · Internally compensated with fast transient response · Wide 4V to 34V operating input voltage ange· Less than 2uA typical shutdown-mode current · Up to 90% efficiency · Thermal shutdown · Overcurrent protection Applications · Simple 1A high-efficiency step-down(buck) regulator · Replacement of TO-220 and TO-263 designs · Efficient pre-regulator(5V to 2.5V,12V to 3.3V, etc.) · On-card switching regulators · Positive-to-negative converter(inverting buck-boost) · Simple battery charger · Negative boost converter · Higher output current regulator using external FET

Features