LT1949 Series

600kHz, 1A Switch PWM DC/DC Converter

Manufacturer: Analog Devices Inc./Maxim Integrated

Catalog

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

Catalog

600kHz, 1A Switch PWM DC/DC Converter

Description

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