DC1658A-B

DC1658A-B demonstration circuit is a 20V high efficiency nanopower step-down converter featuring the LTC3388-3 an ultralow quiescent current step-down regulator. The input current is only 720nA typical at no load while maintaining output voltage regulation. The LTC3388-3 is capable of supplying 50mA of load current, and incorporates an accurate undervoltage lockout feature to disable the converter and maintain a low quiescent current state when the input voltage falls below 2.3V. In regulation, the LTC3388-3 enters a sleep state in which both input and output quiescent currents are minimal. The buck converter turns on and off as needed to maintain regulation. An additional standby mode disables the buck switching while the output is in regulation for short duration loads requiring low ripple.

• 2.7V to 20V input voltage range
• 5V output voltage at D0 = 1, D1 = 1