LT1945IMS#TRPBF

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Analog Devices Inc./Maxim Integrated

DUAL MICROPOWER DC/DC CONVERTER WITH POSITIVE AND NEGATIVE OUTPUTS

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LT1945IMS#TRPBF

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Analog Devices Inc./Maxim Integrated

DUAL MICROPOWER DC/DC CONVERTER WITH POSITIVE AND NEGATIVE OUTPUTS

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Description Specifications Series Pricing CAD Documents

Description

General part information

LT1945 Series

The LT1945 is a dual micropower DC/DC converter in a 10-pin MSOP package. Each converter is designed with a 350mA current limit and an input voltage range of 1.2V to 15V, making the LT1945 ideal for a wide variety of applications. Both converters feature a quiescent current of only 20µA at no load, which further reduces to 0.5µA in shutdown. A current limited, fixed off-time control scheme conserves operating current, resulting in high efficiency over a broad range of load current. The 36V switch allows high voltage outputs up to ±34V to be easily generated without the use of costly transformers. The LT1945’s low off-time of 400ns permits the use of tiny, low profile inductors and capacitors to minimize footprint and cost in space-conscious portable applications.ApplicationsSmall TFT LCD PanelsHandheld ComputersBattery BackupDigital Cameras

Technical Specifications

Parameters and characteristics for this part

Specification	LT1945IMS#TRPBF

Current - Output	250 mA
Function	Step-Up, Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive and Negative (Dual Rail)
Output Type	Adjustable
Package Length	0.118 in
Package Name	10-MSOP, 10-TFSOP
Package Width	3 mm
Synchronous Rectifier	No
Topology	SEPIC, Boost
Voltage - Input (Max)	15 V
Voltage - Input (Min)	1.2 V
Voltage - Output (Max) (Negative)	-34 V
Voltage - Output (Max) (Positive)	34 V
Voltage - Output (Min/Fixed)	1.23 V

LT1945 Series

Dual Micropower DC/DC Converter with Positive and Negative Outputs

Part	Package Length	Package Name	Package Width	Number of Outputs	Voltage - Input (Max)	Mounting Type	Output Configuration	Function	Topology	Voltage - Input (Min)	Synchronous Rectifier	Voltage - Output (Min/Fixed)	Current - Output	Output Type	Operating Temperature (Max)	Operating Temperature (Min)	Voltage - Output (Max) (Positive)	Voltage - Output (Max) (Negative)
Analog Devices Inc./Maxim Integrated LT1945EMS#PBF	0.118 in	10-MSOP 10-TFSOP	3 mm	2	15 V	Surface Mount	Positive and Negative (Dual Rail)	Step-Up Step-Up/Step-Down	Boost SEPIC	1.2 V	No	1.23 V	250 mA	Adjustable	70 °C	0 °C	34 V	-34 V
Analog Devices Inc./Maxim Integrated LT1945IMS#PBF	0.118 in	10-MSOP 10-TFSOP	3 mm	2	15 V	Surface Mount	Positive and Negative (Dual Rail)	Step-Up Step-Up/Step-Down	Boost SEPIC	1.2 V	No	1.23 V	250 mA	Adjustable	85 °C	-40 °C	34 V	-34 V
Analog Devices Inc./Maxim Integrated LT1945EMS#TRPBF	0.118 in	10-MSOP 10-TFSOP	3 mm	2	15 V	Surface Mount	Positive and Negative (Dual Rail)	Step-Up Step-Up/Step-Down	Boost SEPIC	1.2 V	No	1.23 V	250 mA	Adjustable	70 °C	0 °C	34 V	-34 V
Analog Devices Inc./Maxim Integrated LT1945IMS#TRPBF	0.118 in	10-MSOP 10-TFSOP	3 mm	2	15 V	Surface Mount	Positive and Negative (Dual Rail)	Step-Up Step-Up/Step-Down	Boost SEPIC	1.2 V	No	1.23 V	250 mA	Adjustable	85 °C	-40 °C	34 V	-34 V

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R365 Reliability Data

LT1945IMS#TRPBF | Datasheet

Tape and Reel Packaging