LTC3388-3 Datasheet | Linear Technology

Features nn 720n A Input IQ in Regulation (No Load), VIN = 4V nn 820n A Input IQ in Regulation (No Load), VIN = 20V nn 400n A Input IQ in UVLO nn 2.7V to 20V Input Operating Range nn Up to 50m A of Output Current nn Pin Selectable Output Voltages: nn 1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1) nn 2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3) nn High Efficiency Hysteretic Synchronous DC/DC Conversion nn Standby Mode Disables Buck Switching nn Available in 10-Lead MSE and 3mm × 3mm DFN Packages APPLICATIONS nn Keep Alive Power for Portable Products nn Industrial Control Supplies nn Distributed Power Systems nn Battery-Operated Devices LTC3388-1/LTC3388-3 20V High Efficiency Nanopower Step-Down Regulator DESCRIPTION The LTC®3388-1/LTC3388-3 are high efficiency step-down DC/DC converters with internal high side and synchronous power switches that draw only 720n A typical DC supply current at no load while maintaining output voltage regulation. Capable of supplying 50m A of load current, the LTC3388-1/ LTC3388-3 also incorporate an accurate undervoltage lockout (UVLO) feature to disable the converter and maintain a low quiescent current state when the input voltage falls below 2.3V. In regulation, the LTC3388-1/LTC3388-3 enter 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 buck switching while the output is in regulation for short duration loads requiring low ripple. Output voltages of 1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1) and 2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3) are pin selectable. The LTC3388-1/LTC3388-3 can operate with VIN up to 20V while the no load quiescent current remains below 1µA. L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION 50m A Step-Down Converter 2.7V TO 20V 2.2µF 25V 1µF 6V 4.7µF...