Specification	LT1949EMS8#PBF

Current - Output	1 A
Frequency - Switching	600 kHz
Function	Step-Up/Step-Down, 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 / Case	8-TSSOP, 8-MSOP
Package / Case	0.118 in, 3 mm Width
Supplier Device Package	8-MSOP
Synchronous Rectifier	False
Topology	Boost, SEPIC
Voltage - Input (Max) [Max]	12 V
Voltage - Input (Min) [Min]	1.7 V
Voltage - Output (Max) [Max]	28 V
Voltage - Output (Min/Fixed)	1.7 V

LT1949 Series

600kHz, 1A Switch PWM DC/DC Converter

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

Pricing

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

Distributor	Package	Quantity	$	Updated

Digikey	N/A	151	$ 9.21	1m+
	Tube	1	$ 9.64	1m+
		10	$ 6.68
		25	$ 5.92
		100	$ 5.07
		250	$ 4.65
		500	$ 4.40
		1000	$ 4.19
Newark	Each	1	$ 7.87	1m+
		10	$ 5.93
		25	$ 5.45
		50	$ 4.96
		100	$ 4.55
		250	$ 4.12
		500	$ 4.10

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

Documents

Technical documentation and resources

Product Change Notice EN

Datasheet

R365 Reliability Data

Reliability Data