LTC3388 Series

20V High Efficiency Nanopower Step-Down Regulator

Catalog

20V High Efficiency Nanopower Step-Down Regulator

Part	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Current - Output	Voltage - Output (Min/Fixed)	Voltage - Input (Max) [Max]	Output Configuration	Mounting Type	Output Type	Voltage - Input (Min) [Min]	Topology	Function	Number of Outputs	Package / Case	Package / Case
Analog Devices LTC3388IDD-1#PBF	-40 °C	125 ¯C	10-DFN (3x3)	50 mA	1.2 V 1.5 V 1.8 V 2.5 V	20 V	Positive	Surface Mount	Programmable	2.7 V	Buck	Step-Down	1	10-WFDFN Exposed Pad
Analog Devices LTC3388IMSE-3#TRPBF	-40 °C	125 ¯C	10-MSOP-EP	50 mA	2.8 V 3 V 3.3 V 5 V	20 V	Positive	Surface Mount	Programmable	2.7 V	Buck	Step-Down	1	10-MSOP 10-TFSOP Exposed Pad	0.118 in 3 Lead
Analog Devices LTC3388IMSE-3#PBF	-40 °C	125 ¯C	10-MSOP-EP	50 mA	2.8 V 3 V 3.3 V 5 V	20 V	Positive	Surface Mount	Programmable	2.7 V	Buck	Step-Down	1	10-MSOP 10-TFSOP Exposed Pad	0.118 in 3 Lead
Analog Devices LTC3388EDD-3#TRPBF	-40 °C	125 ¯C	10-DFN (3x3)	50 mA	2.8 V 3 V 3.3 V 5 V	20 V	Positive	Surface Mount	Programmable	2.7 V	Buck	Step-Down	1	10-WFDFN Exposed Pad
Analog Devices LTC3388EDD-1#TRPBF	-40 °C	125 ¯C	10-DFN (3x3)	50 mA	1.2 V 1.5 V 1.8 V 2.5 V	20 V	Positive	Surface Mount	Programmable	2.7 V	Buck	Step-Down	1	10-WFDFN Exposed Pad
Analog Devices LTC3388EDD-3#PBF	-40 °C	125 ¯C	10-DFN (3x3)	50 mA	2.8 V 3 V 3.3 V 5 V	20 V	Positive	Surface Mount	Programmable	2.7 V	Buck	Step-Down	1	10-WFDFN Exposed Pad

Catalog

20V High Efficiency Nanopower Step-Down Regulator

Key Features

• 720nA Input IQin Regulation (No Load), VIN= 4V

• 820nA Input IQin Regulation (No Load), VIN= 20V

• 400nA Input IQin UVLO

• 2.7V to 20V Input Operating Range

• Up to 50mA of Output Current

• Pin Selectable Output Voltages:

• 1.2V, 1.5V, 1.8V, 2.5V (LTC3388-1)

• 2.8V, 3.0V, 3.3V, 5.0V (LTC3388-3)

• High Efficiency Hysteretic Synchronous DC/DC Conversion

• Standby Mode Disables Buck Switching

• Available in 10-Lead MSE and 3mm × 3mm DFN Packages

Description

The LTC3388-1/LTC3388-3 are high efficiency step-down DC/DC converters with internal high side and synchronous power switches that draw only 720nA typical DC supply current at no load while maintaining output voltage regulation.Capable of supplying 50mA 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 VINup to 20V while the no load quiescent current remains below 1μA.ApplicationsKeep Alive Power for Portable ProductsIndustrial Control SuppliesDistributed Power SystemsBattery-Operated Devices