LT1949IS8#PBF

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Analog Devices

600KHZ, 1A SWITCH PWM DC/DC CONVERTER

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LT1949IS8#PBF

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Analog Devices

600KHZ, 1A SWITCH PWM DC/DC CONVERTER

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DocumentsR365 Reliability Data Datasheet

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Technical Specifications

Parameters and characteristics for this part

Specification	LT1949IS8#PBF

Current - Output	1 A
Frequency - Switching	600 kHz
Function	Step-Up, Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	8-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Supplier Device Package	8-SO
Synchronous Rectifier	False
Topology	SEPIC, Boost
Voltage - Input (Max) [Max]	12 V
Voltage - Input (Min) [Min]	1.7 V
Voltage - Output (Max)	28 V

LT1949 Series

600kHz, 1A Switch PWM DC/DC Converter

Part	Operating Temperature [Max]	Operating Temperature [Min]	Frequency - Switching	Topology	Voltage - Input (Min) [Min]	Function	Voltage - Output (Max)	Output Type	Mounting Type	Voltage - Input (Max) [Max]	Output Configuration	Supplier Device Package	Number of Outputs	Package / Case	Package / Case [y]	Package / Case [x]	Current - Output	Package / Case [custom]	Package / Case
Analog Devices LT1949IS8#PBF	85 °C	-40 °C	600 kHz	Boost SEPIC	1.7 V	Step-Up Step-Up/Step-Down	28 V	Adjustable	Surface Mount	12 V	Positive	8-SO	1	8-SOIC	3.9 mm	0.154 in	1 A
Analog Devices LT1949ES8#PBF	70 °C	0 °C	600 kHz	Boost SEPIC	1.7 V	Step-Up Step-Up/Step-Down	28 V	Adjustable	Surface Mount	12 V	Positive	8-SO	1	8-SOIC	3.9 mm	0.154 in	1 A
Analog Devices LT1949EMS8#TRPBF	70 °C	0 °C	600 kHz	Boost SEPIC	1.7 V	Step-Up Step-Up/Step-Down	28 V	Adjustable	Surface Mount	12 V	Positive	8-MSOP	1	8-MSOP 8-TSSOP			1 A	0.118 in	3 mm
Analog Devices LT1949IS8#TRPBF	85 °C	-40 °C	600 kHz	Boost SEPIC	1.7 V	Step-Up Step-Up/Step-Down	28 V	Adjustable	Surface Mount	12 V	Positive	8-SO	1	8-SOIC	3.9 mm	0.154 in	1 A

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	$ 10.40
		10	$ 7.24

Description

General part information

LT1949 Series

The LT1949 is a fixed frequency step-up DC/DC converter with a 1A, 0.5Ω internal switch. Capable of generating 10V at 175mA from a 3.3V input, the LT1949 is ideal for generating bias voltages for large screen LCD panels. Constant frequency 600kHz operation results in a low noise output that is easy to filter and the 30V switch rating allows output voltage up to 28V using a single inductor. An external compensation pin gives the user flexibility in optimizing loop compensation, allowing small low ESR ceramic capacitors to be used at the output. The 8-lead MSOP and SO packages ensure a low profile overall solution.The LT1949 includes a low-battery detector that stays alive when the device goes into shutdown. Quiescent current in shutdown is 25µA, while operating current is 4.5mA.ApplicationsLCD Bias SuppliesGPS ReceiversBattery BackupPortable Electronic EquipmentDiagnostic Medical Instrumentation