LT1111CS8-12#PBF

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Analog Devices Inc./Maxim Integrated

MICROPOWER DC/DC CONVERTER ADJUSTABLE AND FIXED 5V, 12V

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LT1111CS8-12#PBF

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Analog Devices Inc./Maxim Integrated

MICROPOWER DC/DC CONVERTER ADJUSTABLE AND FIXED 5V, 12V

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Description Specifications Series Pricing CAD Documents

Description

General part information

LT1111 Series

The LT1111 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 LT1111 functions equally well in step-up, step-down, or inverting applications.The LT1111 oscillator is set at 72kHz, optimizing the device to work with off-the-shelf surface mount inductors. The device can deliver 5V at 100mA from a 3V input in step-up mode or 5V at 200mA from a 12V input in step-down mode.Switch current limit can be programmed with a single resistor. An auxiliary open-collector gain block can be configured as a low-battery detector, linear post regulator, undervoltage lock-out circuit, or error amplifier.For input sources of less than 2V use the LT1110.Applications3V to 5V, 5V to 12V Converters9V to 5V, 12V to 5V ConvertersRemote ControlsPeripherals and Add-On CardsBattery Backup SuppliesUninterruptible SuppliesLaptop and Palmtop ComputersCellular TelephonesPortable InstrumentsFlash Memory VPP Generators

Technical Specifications

Parameters and characteristics for this part

Specification	LT1111CS8-12#PBF

Current - Output	1.5 A
Frequency - Switching	72 kHz
Function	Step-Up, Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	70 °C
Operating Temperature (Min)	0 °C
Output Configuration	Positive or Negative, Positive, Negative
Output Type	Fixed
Package Length	0.154 in
Package Name	8-SOIC, 8-SO
Package Width	3.9 mm
Synchronous Rectifier	No
Topology	Buck, Boost
Voltage - Input (Max)	30 V p-p
Voltage - Input (Min)	2 V
Voltage - Output (Min/Fixed)	12 V

LT1111 Series

Part	Mounting Type	Function	Frequency - Switching	Synchronous Rectifier	Voltage - Output (Max)	Number of Outputs	Voltage - Output (Min/Fixed)	Topology	Package Length	Package Name	Package Width	Voltage - Input (Max)	Voltage - Input (Min)	Output Type	Output Configuration	Current - Output	Operating Temperature (Min)	Operating Temperature (Max)
Analog Devices Inc./Maxim Integrated LT1111CS8#PBF	Surface Mount	Step-Down Step-Up	72 kHz	No	50 V	1	1.25 V	Boost Buck	0.154 in	8-SO 8-SOIC	3.9 mm	30 V p-p	2 V	Adjustable	Negative Positive Positive or Negative	1.5 A	0 °C	70 °C
Analog Devices Inc./Maxim Integrated LT1111CS8#TRPBF	Surface Mount	Step-Down Step-Up	72 kHz	No	50 V	1	1.25 V	Boost Buck	0.154 in	8-SO 8-SOIC	3.9 mm	30 V p-p	2 V	Adjustable	Negative Positive Positive or Negative	1.5 A	0 °C	70 °C
Analog Devices Inc./Maxim Integrated LT1111CN8-5#PBF	Through Hole	Step-Down Step-Up	72 kHz	No		1	5 V	Boost Buck	0.3 in	8-DIP 8-PDIP	7.62 mm	30 V p-p	2 V	Fixed	Negative Positive Positive or Negative	1.5 A	0 °C	70 °C
Analog Devices Inc./Maxim Integrated LT1111CS8-12#TRPBF	Surface Mount	Step-Down Step-Up	72 kHz	No		1	12 V	Boost Buck	0.154 in	8-SO 8-SOIC	3.9 mm	30 V p-p	2 V	Fixed	Negative Positive Positive or Negative	1.5 A	0 °C	70 °C
Analog Devices Inc./Maxim Integrated LT1111IS8#PBF	Surface Mount	Step-Down Step-Up	72 kHz	No	50 V	1	1.25 V	Boost Buck	0.154 in	8-SO 8-SOIC	3.9 mm	30 V p-p	2 V	Adjustable	Negative Positive Positive or Negative	1.5 A	-40 °C	105 °C
Analog Devices Inc./Maxim Integrated LT1111CS8-5#PBF	Surface Mount	Step-Down Step-Up	72 kHz	No		1	5 V	Boost Buck	0.154 in	8-SO 8-SOIC	3.9 mm	30 V p-p	2 V	Fixed	Negative Positive Positive or Negative	1.5 A	0 °C	70 °C
Analog Devices Inc./Maxim Integrated LT1111CS8-5#TRPBF	Surface Mount	Step-Down Step-Up	72 kHz	No		1	5 V	Boost Buck	0.154 in	8-SO 8-SOIC	3.9 mm	30 V p-p	2 V	Fixed	Negative Positive Positive or Negative	1.5 A	0 °C	70 °C
Analog Devices Inc./Maxim Integrated LT1111IS8#TRPBF	Surface Mount	Step-Down Step-Up	72 kHz	No	50 V	1	1.25 V	Boost Buck	0.154 in	8-SO 8-SOIC	3.9 mm	30 V p-p	2 V	Adjustable	Negative Positive Positive or Negative	1.5 A	-40 °C	105 °C
Analog Devices Inc./Maxim Integrated LT1111CN8-12#PBF	Through Hole	Step-Down Step-Up	72 kHz	No		1	12 V	Boost Buck	0.3 in	8-DIP 8-PDIP	7.62 mm	30 V p-p	2 V	Fixed	Negative Positive Positive or Negative	1.5 A	0 °C	70 °C
Analog Devices Inc./Maxim Integrated LT1111IS8	Surface Mount	Step-Down Step-Up	72 kHz	No	50 V	1	1.25 V	Boost Buck	0.154 in	8-SO 8-SOIC	3.9 mm	30 V p-p	2 V	Adjustable	Negative Positive Positive or Negative	1.5 A	-40 °C	105 °C

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LT1111CS8-12#PBF | Datasheet

R177 Reliability Data