LTC3531 Series

200mA Buck-Boost Synchronous DC/DC Converters

Catalog

200mA Buck-Boost Synchronous DC/DC Converters

Part	Current - Output	Operating Temperature [Max]	Operating Temperature [Min]	Topology	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed) [Min]	Supplier Device Package	Voltage - Output (Max)	Number of Outputs	Voltage - Input (Max) [Max]	Function	Output Configuration	Output Type	Mounting Type	Package / Case	Output Type	Voltage - Output (Min/Fixed)
Analog Devices LTC3531EDD#TRPBF	200 mA	85 °C	-40 °C	Buck-Boost	1.8 V	2 V	8-DFN (3x3)	5 V	1	5.5 V	Step-Up/Step-Down	Positive	Adjustable	Surface Mount	8-WFDFN Exposed Pad
Analog Devices LTC3531ES6-3.3#TRMPBF	200 mA	85 °C	-40 °C	Buck-Boost	1.8 V		TSOT-23-6		1	5.5 V	Step-Up/Step-Down	Positive		Surface Mount	SOT-23-6 Thin TSOT-23-6	1.81 mOhm	3.32 V
Analog Devices LTC3531EDD#PBF	200 mA	85 °C	-40 °C	Buck-Boost	1.8 V	2 V	8-DFN (3x3)	5 V	1	5.5 V	Step-Up/Step-Down	Positive	Adjustable	Surface Mount	8-WFDFN Exposed Pad
Analog Devices LTC3531ES6-3#TRPBF	200 mA	85 °C	-40 °C	Buck-Boost	1.8 V	3.02 V	TSOT-23-6		1	5.5 V	Step-Up/Step-Down	Positive		Surface Mount	SOT-23-6 Thin TSOT-23-6	1.81 mOhm
Analog Devices LTC3531EDD-3.3#PBF	200 mA	85 °C	-40 °C	Buck-Boost	1.8 V		8-DFN (3x3)		1	5.5 V	Step-Up/Step-Down	Positive		Surface Mount	8-WFDFN Exposed Pad	1.81 mOhm	3.32 V
Analog Devices LTC3531EDD-3#TRPBF	200 mA	85 °C	-40 °C	Buck-Boost	1.8 V	3.02 V	8-DFN (3x3)		1	5.5 V	Step-Up/Step-Down	Positive		Surface Mount	8-WFDFN Exposed Pad	1.81 mOhm
Analog Devices LTC3531EDD-3#PBF	200 mA	85 °C	-40 °C	Buck-Boost	1.8 V	3.02 V	8-DFN (3x3)		1	5.5 V	Step-Up/Step-Down	Positive		Surface Mount	8-WFDFN Exposed Pad	1.81 mOhm
Analog Devices LTC3531ES6-3#TRMPBF	200 mA	85 °C	-40 °C	Buck-Boost	1.8 V	3.02 V	TSOT-23-6		1	5.5 V	Step-Up/Step-Down	Positive		Surface Mount	SOT-23-6 Thin TSOT-23-6	1.81 mOhm

Catalog

200mA Buck-Boost Synchronous DC/DC Converters

Key Features

• Regulated Output with Input Above, Below or Equal to the Output

• Single Inductor

• Up to 90% Efficiency

• VINRange: 1.8V to 5.5V

• 200mA at 3.3VOUTfrom 3.6V Input

• 125mA at 3VOUTfrom 2.5V Input

• Fixed VOUTVersions (TSOT, DFN): 3.3V, 3V

• Adjustable VOUTVersion (DFN): 2V to 5V

• Burst Mode®Operation, No External Compensation

• Ultra Low Quiescent Current: 16μA, Shutdown Current <1μA

• Only 3 External Components Required(Fixed Voltage Versions)

• Short-Circuit Protection

• Output Disconnect in Shutdown

• Available in 6-Pin ThinSOT and 3mm × 3mm DFN Packages

Description

The LTC3531/LTC3531-3.3/LTC3531-3 are synchronous buck-boost DC/DC converters that operate from input voltages above, below or equal to the output voltage. The topology incorporated in the ICs provides a continuous transfer through all operating modes, making the product ideal for single cell Li-Ion and multicell alkaline or nickel applications. The converters operate in Burst Mode, minimizing solution footprint and component count as well as providing high conversion efficiency over a wide range of load currents.The devices include two 0.5Ω N-channel MOSFET switches and two P-channel switches (0.5Ω, 0.8Ω). Quiescent current is typically 16μA, making the parts ideal for battery power applications. Other features include a <1μA shutdown current, current limiting, thermal shutdown and output disconnect. The parts are offered in a 6-pin ThinSOT™package for fixed voltage versions or a 3mm × 3mm DFN package for fixed and adjustable versions.ApplicationsHandheld InstrumentsMP3 PlayersHandheld computersPDA/GPS