LT1107 Series

Micropower DC/DC Converter Adjustable and Fixed 5V, 12V

Catalog

Micropower DC/DC Converter Adjustable and Fixed 5V, 12V

Part	Supplier Device Package	Output Type	Function	Voltage - Output (Max) [Max]	Voltage - Output (Min/Fixed)	Topology	Output Configuration	Package / Case	Package / Case	Package / Case	Number of Outputs	Current - Output	Voltage - Input (Min) [Min]	Voltage - Input (Max) [Max]	Mounting Type	Frequency - Switching	Package / Case [y]	Package / Case [x]	Operating Temperature [Max]	Operating Temperature [Min]	Output Type
Analog Devices LT1107CN8	8-PDIP	Adjustable	Step-Down Step-Up	50 V	1.25 V	Boost Buck	Positive or Negative	0.3 in	8-DIP	7.62 mm	1	1.5 A	2 V	30 V	Through Hole	63 kHz
Analog Devices LT1107CS8#TRPBF	8-SO	Adjustable	Step-Down Step-Up	50 V	1.25 V	Boost Buck	Positive or Negative		8-SOIC		1	1.5 A	2 V	30 V	Surface Mount	63 kHz	3.9 mm	0.154 in	70 °C	0 °C
Analog Devices LT1107IS8#TRPBF	8-SO	Adjustable	Step-Down Step-Up	50 V	1.25 V	Boost Buck	Positive or Negative		8-SOIC		1	1.5 A	2 V	30 V	Surface Mount	63 kHz	3.9 mm	0.154 in	85 C	-45 °C
Analog Devices LT1107CS8#PBF	8-SO	Adjustable	Step-Down Step-Up	50 V	1.25 V	Boost Buck	Positive or Negative		8-SOIC		1	1.5 A	2 V	30 V	Surface Mount	63 kHz	3.9 mm	0.154 in	70 °C	0 °C
Analog Devices LT1107CN8-5#PBF	8-PDIP		Step-Down Step-Up		5 V	Boost Buck	Positive or Negative	0.3 in	8-DIP	7.62 mm	1	1.5 A	2 V	30 V	Through Hole	63 kHz			70 °C	0 °C	1.81 mOhm
Analog Devices LT1107CS8-12#TRPBF	8-SO		Step-Down Step-Up		12 V	Boost Buck	Positive or Negative		8-SOIC		1	1.5 A	2 V	30 V	Surface Mount	63 kHz	3.9 mm	0.154 in	70 °C	0 °C	1.81 mOhm

Catalog

Micropower DC/DC Converter Adjustable and Fixed 5V, 12V

Key Features

• Operates at Supply Voltages from 2V to 30V

• Consumes Only 320µA Supply Current

• Works in Step-Up or Step-Down Mode

• Only Three External Components Required

• Low-Battery Detector Comparator On-Chip

• User Adjustable Current Limit

• Internal 1A Power Switch

• Fixed or Adjustable Output Voltage Versions

• Space Saving 8-Pin MiniDIP or SO-8 Package

Description

The LT1107 is a versatile micropower DC/DC converter. The device requires only three external components to deliver a fixed output of 5V or 12V. Supply voltage ranges from 2V to 12V in step-up mode and to 30V in step-down mode. The LT1107 functions equally well in step-up, step-down, or inverting applications.The LT1107 is pin-for-pin compatible with the LT1111, but has a duty cycle of 70%, resulting in increased output current in many applications. The LT1107 can deliver 150mA at 5V from a 2AA cell input and 5V at 300mA from 24V in step-down mode. Quiescent current is just 320µA, making the LT1107 ideal for power-conscious battery operated systems. The 63kHz oscillator is optimized to work with surface mount inductors and capacitors.Switch current limit can be programmed with a single resistor. An auxiliary gain block can be configured as a low-battery detector, linear post regulator, undervoltage lock-out circuit, or error amplifier.ApplicationsPalmtop Computers3V to 5V, 5V to 12V Converters24V to 5V, 12V to 5V ConvertersLCD Bias GeneratorsPeripherals and Add-On CardsBattery Backup SuppliesCellular TelephonesPortable Instruments