MIC4680 Datasheet | Micrel Semiconductor

Micrel 1A 200k Hz Super Switcher™ Buck Regulator Final Information General Description The MIC4680 Super Switcher™ is an easy-to-use fixed or adjustable output voltage step-down (buck) switch-mode voltage regulator. The 200k Hz 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 2µA of standby current. The MIC4680 Super Switcher™ regulator requires a minimum number of external ponents and can operate using a standard series of inductors and capacitors. Frequency pensation is provided internally for fast transient response and ease of use. The MIC4680 is available in the 8-lead SOP with a - 40°C to +125°C junction temperature range. Features - - - - - - - - - - - SO-8 package with up to 1.3A output current All surface mount solution Only 4 external ponents required Fixed 200k Hz operation 3.3V, 5V, and adjustable output versions Internally pensated with fast transient response Wide 4V to 34V operating input voltage range Less than 2µA 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 preregulator (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 Typical Applications +6V to +34V C1 15µF 35V SHUTDOWN ENABLE 2 MIC4680-3.3BM IN SW L1 68µH 3.3V/1A C2 220µF 16V SHDN GND 5-...