ANALOG DEVICES LTC3411EMS#PBF DC-DC Switching Synchronous Buck Regulator, Adjustable, 2.625 to 5.5V in, 0.8 to 5V/1.25A out

LTC®3411 is a constant frequency, synchronous, step- down DC/DC converter. Intended for medium power applications, it operates from a 2.63V to 5.5V input voltage range and has a user configurable operating frequency up to 4MHz, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. Its current mode architecture and external compensation allow the transient response to be optimized over a wide range of loads and output capacitors. It can be configured for automatic power saving Burst Mode operation to reduce gate charge losses when the load current drops below the level required for continuous operation. For reduced noise and RF interference, the SYNC/MODE pin can be configured to skip pulses or provide forced continuous operation. Typical applications are notebook computers, digital cameras, cellular phones, handheld instruments, board mounted power supplies.

• Uses tiny capacitors and inductor, high frequency operation: up to 4MHz
• High switch current: 1.6A, low RDS(ON) internal switches: 0.110 ohm
• High efficiency: up to 95%, stable with ceramic capacitors
• Current mode operation for excellent line and load transient response
• Short-circuit protected, low dropout operation: 100% duty cycle
• Selectable Burst Mode® operation, synchronizable to external clock
• Feedback pin input current is ±0.1?A
• Oscillator frequency range from 0.85 to 1.15MHz (RT=324k)
• 10-lead plastic MSOP package
• Temperature rating range from �40°C to 85°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party