The MIC4681-2.5BM SuperSwitcher™ is an easy-to-use step-down (buck) voltage-mode switching regulator. The 200kHz MIC4681-2.5BM achieves over 1A of continuous output current over a 4V to 30V input range in an 8-lead SOP package . The MIC4681-2.5BM features a high 2.1A minimum current limit, making the device ideal for pulsed current applications such as GSM and TDMA cell phone battery chargers and power supplies. The MIC4681-2.5BM sustains an output of 4.2V/2A within a typical GSM charging environment.
The MIC4681-2.5BM has an input voltage range of 4V to 30V, 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 6µA of standby current.
The MIC4681-2.5BM 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 MIC4681-2.5BM is available in the 8-lead SOP with a -40°C to +125°C junction temperature range.
Feature
- SO-8 package with over 1A continuous output current
- Capable of 2A pulse charging for GSM applications
- All surface mount solution
- Only 4 external components required
- Fixed 200kHz operation
- Output adjustable down to 1.25V
- Internally compensated with fast transient response
- Wide operating input voltage range: 4V to 30V
- Less than 6µA typical shutdown-mode current
- Up to 90% efficiency
- Thermal shutdown
- Overcurrent protection
