LT1945EMS#PBF

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Analog Devices

DUAL MICROPOWER DC/DC CONVERTER WITH POSITIVE AND NEGATIVE OUTPUTS

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LT1945EMS#PBF

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Analog Devices

DUAL MICROPOWER DC/DC CONVERTER WITH POSITIVE AND NEGATIVE OUTPUTS

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DocumentsDatasheet R365 Reliability Data

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LT1945EMS#PBF

Current - Output	250 mA
Function	Step-Up, Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Output Configuration	Positive and Negative (Dual Rail)
Output Type	Adjustable
Package / Case	10-MSOP, 10-TFSOP
Package / Case [x]	3 mm
Package / Case [x]	0.118 in
Supplier Device Package	10-MSOP
Synchronous Rectifier	False
Topology	SEPIC, Boost
Voltage - Input (Max) [Max]	15 V
Voltage - Input (Min) [Min]	1.2 V
Voltage - Output (Max)	34 V
Voltage - Output (Min/Fixed)	1.23 V

LT1945 Series

Dual Micropower DC/DC Converter with Positive and Negative Outputs

Part	Current - Output	Number of Outputs	Voltage - Output (Min/Fixed)	Topology	Mounting Type	Output Configuration	Operating Temperature [Max]	Operating Temperature [Min]	Output Type	Voltage - Input (Max) [Max]	Package / Case	Package / Case [x]	Package / Case [x]	Voltage - Input (Min) [Min]	Supplier Device Package	Function	Voltage - Output (Max)
Analog Devices LT1945EMS#PBF	250 mA	2	1.23 V	Boost SEPIC	Surface Mount	Positive and Negative (Dual Rail)	70 °C	0 °C	Adjustable	15 V	10-MSOP 10-TFSOP	3 mm	0.118 in	1.2 V	10-MSOP	Step-Up Step-Up/Step-Down	34 V
Analog Devices LT1945EMS#TRPBF	250 mA	2	1.23 V	Boost SEPIC	Surface Mount	Positive and Negative (Dual Rail)	70 °C	0 °C	Adjustable	15 V	10-MSOP 10-TFSOP	3 mm	0.118 in	1.2 V	10-MSOP	Step-Up Step-Up/Step-Down	34 V
Analog Devices LT1945IMS#TRPBF	250 mA	2	1.23 V	Boost SEPIC	Surface Mount	Positive and Negative (Dual Rail)	85 °C	-40 °C	Adjustable	15 V	10-MSOP 10-TFSOP	3 mm	0.118 in	1.2 V	10-MSOP	Step-Up Step-Up/Step-Down	34 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 7.81
		10	$ 5.34
		25	$ 4.71
		100	$ 3.99
		250	$ 3.65
		500	$ 3.44
		1000	$ 3.26
		2500	$ 3.11

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