LT3837IFE#PBF

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Analog Devices

CURRENT MODE PWM CONTROLLER 50KHZ TO 250KHZ 16-PIN TSSOP EP TUBE

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LT3837IFE#PBF

Active

Analog Devices

CURRENT MODE PWM CONTROLLER 50KHZ TO 250KHZ 16-PIN TSSOP EP TUBE

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DocumentsDatasheet R458 Reliability Data

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LT3837IFE#PBF

Clock Sync	True
Control Features	Frequency Control, On Time Control, Enable
Duty Cycle (Max) [Max]	88 %
Frequency - Switching	100 kHz
Function	Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive, Isolation Capable
Output Phases	1
Output Type	Transistor Driver
Package / Case	Exposed Pad, 16-TSSOP
Package / Case [custom]	0.173 "
Package / Case [custom]	4.4 mm
Supplier Device Package	16-TSSOP-EP
Synchronous Rectifier	True
Topology	Flyback
Voltage - Supply (Vcc/Vdd) [Max]	20 V
Voltage - Supply (Vcc/Vdd) [Min]	4.5 V

LT3837 Series

Isolated No-Opto Synchronous Flyback Controller

Part	Mounting Type	Output Type	Supplier Device Package	Frequency - Switching	Control Features	Number of Outputs	Function	Topology	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Output Configuration	Package / Case [custom]	Package / Case	Package / Case [custom]	Duty Cycle (Max) [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Output Phases
Analog Devices LT3837IFE#PBF	Surface Mount	Transistor Driver	16-TSSOP-EP	100 kHz	Enable Frequency Control On Time Control	1	Step-Up/Step-Down	Flyback	20 V	4.5 V	Isolation Capable Positive	0.173 "	16-TSSOP Exposed Pad	4.4 mm	88 %	-40 °C	125 ¯C	1
Analog Devices LT3837EFE#PBF	Surface Mount	Transistor Driver	16-TSSOP-EP	100 kHz	Enable Frequency Control On Time Control	1	Step-Up/Step-Down	Flyback	20 V	4.5 V	Isolation Capable Positive	0.173 "	16-TSSOP Exposed Pad	4.4 mm	88 %	-40 °C	125 ¯C	1
Analog Devices LT3837IFE#TRPBF	Surface Mount	Transistor Driver	16-TSSOP-EP	100 kHz	Enable Frequency Control On Time Control	1	Step-Up/Step-Down	Flyback	20 V	4.5 V	Isolation Capable Positive	0.173 "	16-TSSOP Exposed Pad	4.4 mm	88 %	-40 °C	125 ¯C	1

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	$ 10.53
		10	$ 7.18
		95	$ 5.34
		190	$ 4.96
		285	$ 4.91
Newark	Each	1	$ 10.53
		10	$ 7.18
		25	$ 6.56
		50	$ 5.95
		100	$ 5.34
		250	$ 4.96
		500	$ 4.91

Description

General part information

LT3837 Series

The LT3837 is an isolated switching regulator controller designed for medium power flyback topologies. A typical application is 10W to 60W with the part powered from a DC supply.The LT3837 is a current mode controller that regulates an output voltage based on sensing the secondary voltage via a transformer winding during flyback. This allows for tight output regulation without the use of an optoisolator, improving dynamic response and reliability. Synchronous rectification increases converter efficiency and improves output cross regulation in multiple output converters.The LT3837 operates in forced continuous conduction mode which improves cross regulation in multiple winding applications. Switching frequency is user programmable and can be externally synchronized. The part also has load compensation, undervoltage lockout and soft-start circuitry.The LT3837 is available in a thermally enhanced 16-pin TSSOP package.ApplicationsIsolated Medium Power (10W to 60W) SuppliesInstrumentation Power SuppliesIsolated Medical Supplies