MAX38650 nanoPower Buck Converter

ADI's MAX38650 is a nanoPower, ultra-low 390 nA quiescent current, buck (step-down) DC/DC converter operating from 1.8 V to 5.5 V input voltage and supporting load currents of up to 100 mA with peak efficiencies of 95%. While in shutdown, there is only 5 nA of shutdown current. The device offers ultra-low quiescent current, small total solution size, and high efficiency throughout the load range. The device is ideal for battery applications requiring long battery life. The MAX38650 supports 100% duty cycle operation, allowing seamless transition as the battery discharges and falls below the target output voltage. The MAX38650 utilizes a unique control scheme that allows ultra-low quiescent current and high efficiency over a wide output current range. The device is offered in a space-saving 1.58 mm x 0.89 mm 6-pin wafer-level package (WLP) (2 x 3 bumps, 0.4 mm pitch). The part is specified over the -40°C to +125°C operating temperature range.

The MAX38650AEVK#WLP evaluation kit (EV kit) evaluates the MAX38650A IC in a WLP package. The MAX38650A is an ultra-low quiescent current step-down DC/DC converter. The EV kit operates from an input range of 1.8 V to 5.5 V ,providing resistor-configurable output voltages from 1.2 V to 3.3 V. The kit delivers up to 100 mA of current and comes with the MAX38650AANT+ installed.

Features

• Extends battery life
• 390 nA ultra-low quiescent supply current
• 5 nA shutdown current
• 95% peak efficiency and over 85% at 10 μA
• Easy to use - addresses popular operation
• 1.8 V to 5.5 V input range
• Single resistor adjustable V_OUT from 1.2 V to 3.3 V (MAX38650A)
• Preprogrammed V_OUT from 1.2 V to 5 V (MAX38650B) in steps of 50 mV
• 100% duty cycle mode for low dropout operation
• ±1.5% output voltage accuracy
• 100 mA load current
• Protects system in multiple use cases
• Reverse-current blocking in shutdown
• Active discharge feature
• Reduces size and increases reliability
• -40°C to +125°C operating temperature range
• 1.58 mm x 0.89 mm, 0.4 mm pitch, 6-pin (2 x 3) WLP