Specification	LM5181NGUR

Current - Output	500 mA
Frequency - Switching [Max]	350 kHz
Frequency - Switching [Min]	12 kHz
Function	Step-Up/Step-Down
Grade	Automotive
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature [Max]	150 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	1.81 mOhm
Package / Case	8-WDFN Exposed Pad
Qualification	AEC-Q100
Supplier Device Package	8-WSON (4x4)
Synchronous Rectifier	False
Topology	Flyback
Voltage - Input (Max) [Max]	65 V
Voltage - Input (Min) [Min]	4.5 V
Voltage - Output (Min/Fixed)	5 V

LM5181-Q1 Series

Automotive 65-VIN no-opto flyback DC/DC converter with 100-V, 0.75-A integrated MOSFET

Part	Number of Outputs	Voltage - Input (Min) [Min]	Current - Output	Supplier Device Package	Frequency - Switching [Max]	Frequency - Switching [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Synchronous Rectifier	Function	Voltage - Input (Max) [Max]	Topology	Grade	Mounting Type	Output Type	Qualification	Voltage - Output (Min/Fixed)	Package / Case	Output Configuration	Output Type	Voltage - Output (Max) [Max]
Texas Instruments LM5181NGUR	1	4.5 V	500 mA	8-WSON (4x4)	350 kHz	12 kHz	150 °C	-40 °C		Step-Up/Step-Down	65 V	Flyback	Automotive	Surface Mount	1.81 mOhm	AEC-Q100	5 V	8-WDFN Exposed Pad	Positive
Texas Instruments LM5181QNGURQ1	1	4.5 V	750 mA	8-WSON (4x4)	350 kHz	12 kHz	150 °C	-40 °C		Step-Up/Step-Down	65 V	Flyback	Automotive	Surface Mount		AEC-Q100	0 V	8-WDFN Exposed Pad	Positive	Adjustable	100 V

Pricing

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

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 2.78
		10	$ 2.50
		25	$ 2.36
		100	$ 2.05
		250	$ 1.94
		500	$ 1.74
		1000	$ 1.47
	Digi-Reel®	1	$ 2.78
		10	$ 2.50
		25	$ 2.36
		100	$ 2.05
		250	$ 1.94
		500	$ 1.74
		1000	$ 1.47
	Tape & Reel (TR)	4500	$ 1.40
Texas Instruments	LARGE T&R	1	$ 2.33
		100	$ 1.92
		250	$ 1.38
		1000	$ 1.04

Description

General part information

LM5181-Q1 Series

The LM5181-Q1 is a primary-side regulated (PSR) flyback converter with high efficiency over a wide input voltage range of 4.5 V to 65 V. The isolated output voltage is sampled from the primary-side flyback voltage, eliminating the need for an optocoupler, voltage reference, or third winding from the transformer for output voltage regulation.

The high level of integration results in a simple, reliable and high-density design with only one component crossing the isolation barrier. Boundary conduction mode (BCM) switching enables a compact magnetic solution and better than ±1.5% load and line regulation performance. An integrated 100-V power MOSFET provides output power up to 4 W with enhanced headroom for line transients.

The LM5181-Q1 converter is qualified to automotive AEC-Q100 grade 1 and is available in 8-pin WSON package with 0.8-mm pin pitch and wettable flanks.