Integrated Circuits (ICs)

LM5018MRX/NOPB

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7.5-100V WIDE VIN, 300MA CONSTANT ON-TIME SYNCHRONOUS BUCK REGULATOR

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DocumentsWide VIN power management ICs simplify white paper (Rev. A)Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A)+17

Integrated Circuits (ICs)

LM5018MRX/NOPB

Active

Texas Instruments

7.5-100V WIDE VIN, 300MA CONSTANT ON-TIME SYNCHRONOUS BUCK REGULATOR

Deep-Dive with AI

DocumentsWide VIN power management ICs simplify white paper (Rev. A)Valuing wide VIN, low EMI synchronous buck circuits for cost-driven, demanding a (Rev. A)+17

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LM5018MRX/NOPB

Current - Output	300 mA
Frequency - Switching	Adj to 1MHz
Function	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 Type	Adjustable
Package / Case	8-PowerSOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Supplier Device Package	8-SO PowerPad
Synchronous Rectifier	True
Topology	Buck
Voltage - Input (Max) [Max]	100 V
Voltage - Input (Min) [Min]	7.5 V
Voltage - Output (Max) [Max]	90 V
Voltage - Output (Min/Fixed)	1.225 V

LM5018 Series

7.5-100V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator

Part	Main Purpose	Frequency - Switching	Regulator Topology	Supplied Contents	Voltage - Output [Min]	Voltage - Output [Max]	Voltage - Input [Min]	Voltage - Input [Max]	Current - Output	Utilized IC / Part	Board Type	Outputs and Type	Voltage - Input (Max) [Max]	Output Configuration	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Input (Min) [Min]	Voltage - Output (Max) [Max]	Output Type	Function	Supplier Device Package	Package / Case [y]	Package / Case [x]	Package / Case	Voltage - Output (Min/Fixed)	Frequency - Switching	Topology	Number of Outputs	Mounting Type
Texas Instruments LM5018ISOEVAL/NOPB	DC/DC Step Down	750 kHz	Buck	Board(s)	9.5 V	10 V	20 VDC	100 V	250 mA	LM5018	Fully Populated	1 1
Texas Instruments LM5018MR/NOPB									300 mA				100 V	Isolation Capable Positive	-40 °C	125 ¯C	7.5 V	90 V	Adjustable	Step-Down	8-SO PowerPad	3.9 mm	0.154 in	8-PowerSOIC	1.225 V	Adj to 1MHz	Buck	1	Surface Mount
Texas Instruments LM5018SDX/NOPB									300 mA				100 V	Isolation Capable Positive	-40 °C	125 ¯C	7.5 V	90 V	Adjustable	Step-Down	8-WSON (4x4)			8-WDFN Exposed Pad	1.225 V	Adj to 1MHz	Buck	1	Surface Mount
Texas Instruments LM5018MRX/NOPB									300 mA				100 V	Isolation Capable Positive	-40 °C	125 ¯C	7.5 V	90 V	Adjustable	Step-Down	8-SO PowerPad	3.9 mm	0.154 in	8-PowerSOIC	1.225 V	Adj to 1MHz	Buck	1	Surface Mount
Texas Instruments LM5018SD/NOPB									300 mA				100 V	Isolation Capable Positive	-40 °C	125 ¯C	7.5 V	90 V	Adjustable	Step-Down	8-WSON (4x4)			8-WDFN Exposed Pad	1.225 V	Adj to 1MHz	Buck	1	Surface Mount

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	$ 3.18
		10	$ 2.86
		25	$ 2.70
		100	$ 2.34
		250	$ 2.22
		500	$ 1.99
		1000	$ 1.68
	Digi-Reel®	1	$ 3.18
		10	$ 2.86
		25	$ 2.70
		100	$ 2.34
		250	$ 2.22
		500	$ 1.99
		1000	$ 1.68
	Tape & Reel (TR)	2500	$ 1.60
		5000	$ 1.54
Texas Instruments	LARGE T&R	1	$ 2.40
		100	$ 2.10
		250	$ 1.47
		1000	$ 1.19

Description

General part information

LM5018 Series

The LM5018 is a 100-V, 300-mA synchronous step-down regulator with integrated high-side and low-side MOSFETs. The constant-on-time (COT) control scheme employed in the LM5018 device requires no loop compensation, provides excellent transient response, and enables very low step-down ratios. The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high-voltage startup regulator provides bias power for internal operation of the IC and for integrated gate drivers.

A peak current limit circuit protects against overload conditions. The undervoltage lockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independently programmed. Other protection features include thermal shutdown and bias supply undervoltage lockout.

The LM5018 device is available in WSON-8 and SO PowerPAD-8 plastic packages.