LTC1265 Series

1.2A, High Efficiency Step-Down DC/DC Converter

Catalog

1.2A, High Efficiency Step-Down DC/DC Converter

Part	Voltage - Input (Max) [Max]	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]	Output Configuration	Frequency - Switching [Max]	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed)	Package / Case [x]	Package / Case [y]	Package / Case	Current - Output	Supplier Device Package	Output Type	Function	Voltage - Output (Max) [Max]	Number of Outputs	Topology	Output Type
Analog Devices LTC1265CS#TRPBF	13 V	Surface Mount	70 °C	0 °C	Positive or Negative	700 kHz	4 V	1.25 V	0.154 in	3.9 mm	14-SOIC	1.2 A	14-SO	Adjustable	Step-Down Step-Up/Step-Down	13 V	1	Buck Buck-Boost SEPIC
Analog Devices LTC1265CS-5#TRPBF	13 V	Surface Mount	70 °C	0 °C	Positive or Negative	700 kHz	4 V	5 V	0.154 in	3.9 mm	14-SOIC	1.2 A	14-SO		Step-Down Step-Up/Step-Down		1	Buck Buck-Boost SEPIC	1.81 mOhm
Analog Devices LTC1265IS#PBF	13 V	Surface Mount	85 °C	-40 °C	Positive or Negative	700 kHz	4 V	1.25 V	0.154 in	3.9 mm	14-SOIC	1.2 A	14-SO	Adjustable	Step-Down Step-Up/Step-Down	13 V	1	Buck Buck-Boost SEPIC

Catalog

1.2A, High Efficiency Step-Down DC/DC Converter

Key Features

• High Efficiency: Up to 95%

• Current Mode Operation for Excellent Line and Load Transient Response

• Internal 0.3Ω Power Switch (VIN= 10V)

• Short-Circuit Protection

• Low Dropout Operation: 100% Duty Cycle

• Low-Battery Detector

• Low 160µA Standby Current at Light Loads

• Active-High Micropower Shutdown: IQ< 15µA

• Peak Inductor Current Independent of Inductor Value

• Available in 14-pin SO Package

Description

The LTC1265 is a monolithic step-down current mode DC/DC converter featuring Burst Mode™ operation at low output current. The LTC1265 incorporates a 0.3Ω switch (VIN=10V) allowing up to 1.2A of output current.Under no load condition, the converter draws only 160µA. In shutdown it typically draws a mere 5µA making this converter ideal for current sensitive applications. In dropout the internal P-channel MOSFET switch is turned on continuously maximizing the life of the battery source. The LTC1265 incorporates automatic power saving Burst Mode operation to reduce gate charge losses when the load currents drop below the level required for continuous operation.The inductor current is user-programmable via an external current sense resistor. Operation up to 700kHz permits the use of small surface mount inductors and capacitors.Applications5V to 3.3V ConversionDistributed Power SystemsStep-Down ConvertersInverting ConvertersMemory Backup SupplyPortable InstrumentsBattery-Powered EquipmentCellular Telephones