ANALOG DEVICES LTC3411IDD#PBF DC-DC Switching Synchronous Buck Regulator, Adjustable, 2.63 to 5.5V in, 0.8 to 5V/1.25A Out, DFN-10

LTC3411IDD#PBF is a constant frequency, synchronous, step-down DC/DC converter. The output voltage is adjustable from 0.8V to 5V. Internal synchronous 0.11ohm power switches with 1.6A peak current ratings provide high efficiency. The LTC3411�s current mode architecture and external compensation allow the transient response to be optimized over a wide range of loads and output capacitors. The LTC3411 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. To further maximize battery life, the P-channel MOSFET is turned on continuously in dropout (100% duty cycle) with a low quiescent current of 60?A. Applications include notebook computers, digital cameras, cellular phones, handheld instruments, board mounted power supplies.

• 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
• Output voltages from 0.8V to 5V, synchronizable to external clock
• Selectable Burst Mode® operation, peak switch current limit is 2A typ at (ITH = 1.3, TA = 25°C)
• Oscillator frequency is 1MHz typical at (RT = 324K, TA = 25°C)
• Switch leakage current is 0.01µA typical at (VIN = 6V, VITH/RUN = 0V, VFB = 0V, TA = 25°C)
• Active mode input DC supply current is 240?A typical at (VFB = 0.75V, SYNC/MODE = 3.3V)
• Top switch on-resistance is 0.11 ohm typical at (VIN = 3.3V, TA = 25°C)
• Operating temperature range from -40°C to 125°C, 10-lead plastic DFN package

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