LT1109A Series

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

Catalog

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

Part	Mounting Type	Number of Outputs	Output Configuration	Current - Output	Voltage - Output (Min/Fixed)	Package / Case	Package / Case	Package / Case	Voltage - Input (Max) [Max]	Function	Operating Temperature [Max]	Frequency - Switching	Output Type	Topology	Supplier Device Package	Voltage - Input (Min) [Min]	Voltage - Output (Max) [Max]	Package / Case [y]	Package / Case [x]	Output Type
Analog Devices LT1109ACN8#PBF	Through Hole	1	Positive	2 A	1.25 V	0.3 in	8-DIP	7.62 mm	9 V	Step-Up	70 °C	120 kHz	Adjustable	Boost	8-PDIP	2 V	50 V
Analog Devices LT1109CS8-5#TRPBF	Surface Mount	1	Positive	1.2 A	5 V		8-SOIC		20 V	Step-Up	70 °C	120 kHz		Boost	8-SO	3 V		3.9 mm	0.154 in	1.81 mOhm
Analog Devices LT1109CZ-5#PBF	Through Hole	1	Positive	1.2 A	5 V		TO-226-3 TO-92-3		20 V	Step-Up	70 °C	120 kHz		Boost	TO-92-3	3 V				1.81 mOhm
Analog Devices LT1109CN8#PBF	Through Hole	1	Positive	1.2 A	1.25 V	0.3 in	8-DIP	7.62 mm	20 V	Step-Up	70 °C	120 kHz	Adjustable	Boost	8-PDIP	3 V	50 V
Analog Devices LT1109ACN8-5#PBF	Through Hole	1	Positive	2 A	5 V	0.3 in	8-DIP	7.62 mm	9 V	Step-Up	70 °C	120 kHz		Boost	8-PDIP	2 V				1.81 mOhm
Analog Devices LT1109CS8-5#PBF	Surface Mount	1	Positive	1.2 A	5 V		8-SOIC		20 V	Step-Up	70 °C	120 kHz		Boost	8-SO	3 V		3.9 mm	0.154 in	1.81 mOhm
Analog Devices LT1109ACS8-5#PBF	Surface Mount	1	Positive	2 A	5 V		8-SOIC		9 V	Step-Up	70 °C	120 kHz		Boost	8-SO	2 V		3.9 mm	0.154 in	1.81 mOhm
Analog Devices LT1109CN8-5#PBF	Through Hole	1	Positive	1.2 A	5 V	0.3 in	8-DIP	7.62 mm	20 V	Step-Up	70 °C	120 kHz		Boost	8-PDIP	3 V				1.81 mOhm
Analog Devices LT1109ACS8-12#TRPBF	Surface Mount	1	Positive	2 A	12 V		8-SOIC		9 V	Step-Up	70 °C	120 kHz		Boost	8-SO	2 V		3.9 mm	0.154 in	1.81 mOhm
Analog Devices LT1109ACN8-12#PBF	Through Hole	1	Positive	2 A	12 V	0.3 in	8-DIP	7.62 mm	9 V	Step-Up	70 °C	120 kHz		Boost	8-PDIP	2 V				1.81 mOhm

Catalog

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

Key Features

• Uses Off-the-Shelf Inductors

• Only 33µH Inductor Required

• Low Cost

• 3-Lead TO-92, SO8, or 8-Pin DIP

• Adjustable or Fixed 5V or 12V Output

• 120kHz Oscillator

• Only Three External Components Required

• 320µA IQ

• 1.6V Minimum Start-Up Voltage

• Logic Controlled Shutdown

Description

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