LT1109CS8#PBF

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Analog Devices Inc./Maxim Integrated

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

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LT1109CS8#PBF

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Analog Devices Inc./Maxim Integrated

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

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Description Specifications Series Pricing CAD Documents

Description

General part information

LT1109 Series

The LT1109 is a simple step-up DC/DC converter. Available in 8-pin SO, 3-lead TO-92 (fixed output only) or miniDIP packages, the devices require only three external components to construct a complete DC/DC converter. Current drain is just 320µA at no load, making the device ideal for cost-sensitive applications where standby current must be kept to a minimum.The LT1109-5 can deliver 5V at 100mA from a 3V input and the LT1109-12 can deliver 12V at 60mA from a 5V input. The 8-pin versions also feature a logic controlledSHUTDOWNpin that turns off the oscillator when taken low. The gated-oscillator design requires no frequency compensation components. The high frequency 120kHz oscillator permits the use of small surface mount inductors and capacitors. For a 5V to 12V at 120mA converter, see the LT1109A. For a 5V to 12V at 200mA converter with 20µA shutdown current, see the LT1301.ApplicationsFlash Memory VPP Generators3V to 5V Converters5V to 12V ConvertersDisk DrivesPC Plug-In CardsPeripheralsBattery-Powered Equipment

Technical Specifications

Parameters and characteristics for this part

Specification	LT1109CS8#PBF

Current - Output	1.2 A
Frequency - Switching	120 kHz
Function	Step-Up
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	70 °C
Operating Temperature (Min)	0 °C
Output Configuration	Positive
Output Type	Adjustable
Package Length	0.154 in
Package Name	8-SOIC, 8-SO
Package Width	3.9 mm
Synchronous Rectifier	No
Topology	Boost
Voltage - Input (Max)	20 V
Voltage - Input (Min)	3 V
Voltage - Output (Max)	50 V
Voltage - Output (Min/Fixed)	1.25 V

LT1109 Series

Micropower DC/DC Converter Flash Memory VPP Generator Adjustable and Fixed 5V, 12V

Part	Output Type	Voltage - Input (Min)	Synchronous Rectifier	Number of Outputs	Mounting Type	Package Length	Package Name	Package Width	Operating Temperature (Max)	Current - Output	Output Configuration	Voltage - Input (Max)	Topology	Frequency - Switching	Voltage - Output (Min/Fixed)	Function	Voltage - Output (Max)	Package / Case
Analog Devices Inc./Maxim Integrated LT1109CS8-12#PBF	Fixed	5 V	No	1	Surface Mount	0.154 in	8-SO 8-SOIC	3.9 mm	70 °C	1.2 A	Positive	20 V	Boost	120 kHz	12 V	Step-Up
Analog Devices Inc./Maxim Integrated LT1109ACN8#PBF	Adjustable	2 V	No	1	Through Hole	0.3 in	8-DIP 8-PDIP	7.62 mm	70 °C	2 A	Positive	9 V	Boost	120 kHz	1.25 V	Step-Up	50 V
Analog Devices Inc./Maxim Integrated LT1109CS8-12#TRPBF	Fixed	5 V	No	1	Surface Mount	0.154 in	8-SO 8-SOIC	3.9 mm	70 °C	1.2 A	Positive	20 V	Boost	120 kHz	12 V	Step-Up
Analog Devices Inc./Maxim Integrated LT1109CS8-5#TRPBF	Fixed	3 V	No	1	Surface Mount	0.154 in	8-SO 8-SOIC	3.9 mm	70 °C	1.2 A	Positive	20 V	Boost	120 kHz	5 V	Step-Up
Analog Devices Inc./Maxim Integrated LT1109CS8#PBF	Adjustable	3 V	No	1	Surface Mount	0.154 in	8-SO 8-SOIC	3.9 mm	70 °C	1.2 A	Positive	20 V	Boost	120 kHz	1.25 V	Step-Up	50 V
Analog Devices Inc./Maxim Integrated LT1109CZ-5#PBF	Fixed	3 V	No	1	Through Hole		TO-92-3		70 °C	1.2 A	Positive	20 V	Boost	120 kHz	5 V	Step-Up		TO-226-3 TO-92-3 (TO-226AA)
Analog Devices Inc./Maxim Integrated LT1109CN8#PBF	Adjustable	3 V	No	1	Through Hole	0.3 in	8-DIP 8-PDIP	7.62 mm	70 °C	1.2 A	Positive	20 V	Boost	120 kHz	1.25 V	Step-Up	50 V
Analog Devices Inc./Maxim Integrated LT1109ACN8-5#PBF	Fixed	2 V	No	1	Through Hole	0.3 in	8-DIP 8-PDIP	7.62 mm	70 °C	2 A	Positive	9 V	Boost	120 kHz	5 V	Step-Up
Analog Devices Inc./Maxim Integrated LT1109CS8-5#PBF	Fixed	3 V	No	1	Surface Mount	0.154 in	8-SO 8-SOIC	3.9 mm	70 °C	1.2 A	Positive	20 V	Boost	120 kHz	5 V	Step-Up
Analog Devices Inc./Maxim Integrated LT1109ACS8-5#PBF	Fixed	2 V	No	1	Surface Mount	0.154 in	8-SO 8-SOIC	3.9 mm	70 °C	2 A	Positive	9 V	Boost	120 kHz	5 V	Step-Up

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LT1109CS8#PBF | Datasheet

R177 Reliability Data