ANALOG DEVICES LTC3646HMSE#PBF DC-DC Switching Synchronous Buck Regulator, Adjustable, 4 to 40V in, 2 to 30V / 1A Out, MSOP-16

LTC3646HMSE#PBF is a high efficiency, step-down DC/DC converter with internal high side and synchronous power FETs. It draws only 140µA typical DC supply current in Burst Mode operation at no load while maintaining output voltage regulation. The device can supply up to a 1A load, and its combination of Burst Mode operation, integrated power switches and low quiescent current provides high efficiency over a broad range of load currents. Alternatively, it can be used in forced continuous mode for ripple sensitive applications. The device has a wide 4.0V to 40V input range and its patented controlled on-time architecture and 0.6V reference voltage allow for large step-down ratios without the risk of output overvoltage. The frequency may be set between 200KHz and 3.0MHz with a program resistor or synchronized to an external clock. Applications include point of load power supplies, intermediate bus power, automotive applications.

• Wide input voltage range from 4.0V to 40V, ±1% accurate reference voltage
• 2.0V to 30V output voltage, high efficiency up to 95%
• Selectable high efficiency Burst Mode® operation or forced continuous mode
• Internal or external compensation, 2.25MHz typ internal oscillator frequency at VRT=VINTVCC, TA=25°C
• DC supply current (forced continuous) is 620µA typical at (TA = 25°C)
• Feedback input current is ±20nA maximum at (VFB = 0.6V)
• Minimum on-time is 30ns typical at (VIN = 40V, RRT = 30K, VON = 2V)
• Internal soft-start time is 250µs typical at (TA = 25°C)
• Top switch on-resistance is 200mohm typical at (VIN = 5.5V, TA = 25°C)
• Operating temperature range from -40°C to 150°C, 16-lead plastic MSOP 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