Integrated Circuits (ICs)

LM5161QPWPTQ1

Active

WIDE INPUT 4.5-V TO 100-V, 1-A SYNCHRONOUS BUCK / FLY-BUCK CONVERTER

Deep-Dive with AI

Search across all available documentation for this part.

DocumentsAN-2292 Designing an Isolated Buck (Fly-Buck) Converter (Rev. C)Fly-Buck(TM) converter provides EMC and isolation in PLC applications +14

Integrated Circuits (ICs)

LM5161QPWPTQ1

Active

Texas Instruments

WIDE INPUT 4.5-V TO 100-V, 1-A SYNCHRONOUS BUCK / FLY-BUCK CONVERTER

Deep-Dive with AI

DocumentsAN-2292 Designing an Isolated Buck (Fly-Buck) Converter (Rev. C)Fly-Buck(TM) converter provides EMC and isolation in PLC applications +14

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LM5161QPWPTQ1

Current - Output	1 A
Frequency - Switching [Max]	1 MHz
Frequency - Switching [Min]	50 kHz
Function	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, Isolation Capable
Output Type	Adjustable
Package / Case	14-PowerTSSOP
Package / Case [x]	0.173 in
Package / Case [y]	4.4 mm
Qualification	AEC-Q100
Supplier Device Package	14-HTSSOP
Synchronous Rectifier	True
Voltage - Input (Max) [Max]	100 V
Voltage - Input (Min) [Min]	4.5 V
Voltage - Output (Max)	92 V
Voltage - Output (Min/Fixed) [Min]	2 V

LM5161-Q1 Series

Wide Input 4.5-V to 100-V, 1-A Synchronous Buck / Fly-Buck Converter

Part	Outputs and Type	Outputs and Type	Utilized IC / Part	Regulator Topology	Board Type	Current - Output	Voltage - Input [Min]	Voltage - Input [Max]	Frequency - Switching	Main Purpose	Voltage - Output	Supplied Contents	Voltage - Input (Max) [Max]	Mounting Type	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed) [Min]	Qualification	Frequency - Switching [Min]	Frequency - Switching [Max]	Number of Outputs	Grade	Output Type	Function	Operating Temperature [Max]	Operating Temperature [Min]	Output Configuration	Package / Case	Package / Case [y]	Package / Case [x]	Voltage - Output (Max)	Supplier Device Package
Texas Instruments LM5161PWPBKEVM	Non-Isolated	1	LM5161-Q1	Buck	Fully Populated	1 A	15 V	80 V	300 kHz	DC/DC Step Down	12 V	Board(s)
Texas Instruments LM5161PWPFBKEVM	Non-Isolated	1	LM5161-Q1	Buck	Fully Populated	800 mA	36 V	72 V	300 kHz	DC/DC Step Down	12 V	Board(s)
Texas Instruments LM5161QPWPTQ1						1 A							100 V	Surface Mount	4.5 V	2 V	AEC-Q100	50 kHz	1 MHz	1	Automotive	Adjustable	Step-Down	150 °C	-40 °C	Isolation Capable Positive	14-PowerTSSOP	4.4 mm	0.173 in	92 V	14-HTSSOP
Texas Instruments LM5161PWPR						1 A							100 V	Surface Mount	4.5 V	2 V		50 kHz	1 MHz	1		Adjustable	Step-Down	125 ¯C	-40 °C	Isolation Capable Positive	14-PowerTSSOP	4.4 mm	0.173 in	92 V	14-HTSSOP

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	$ 6.43
		10	$ 5.78
		25	$ 5.46
		100	$ 4.73
	Digi-Reel®	1	$ 6.43
		10	$ 5.78
		25	$ 5.46
		100	$ 4.73
	Tape & Reel (TR)	250	$ 4.49
		500	$ 4.03
		1250	$ 3.40
		2500	$ 3.23
Texas Instruments	SMALL T&R	1	$ 4.42
		100	$ 3.61
		250	$ 2.83
		1000	$ 2.40

Description

General part information

LM5161-Q1 Series

The LM5161-Q1 is a 100-V, 1-A synchronous step-down converter with integrated high-side and low-side MOSFETs. The constant-ON-time control scheme requires no loop compensation and supports high step-down ratios with fast transient response. An internal feedback amplifier maintains ±1% output voltage regulation over the entire operating temperature range. The ON-time varies inversely with input voltage resulting in nearly constant switching frequency. Peak and valley current limit circuits protect against overload conditions. The under-voltage lockout (EN/UVLO) circuit provides independently adjustable input undervoltage threshold and hysteresis. The FPWM input pin in LM5161-Q1 selects either the forced continuous conduction mode (CCM) under all load levels or the discontinuous conduction mode (DCM) under light or no load conditions. When operating in forced CCM, the LM5161-Q1 supports the multiple output and isolated Fly-Buck applications. When programmed for the DCM operation, the LM5161-Q1 provides a tightly regulated buck output without any additional external feedback ripple injection circuit.