LM5161-Q1 Series

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

Catalog

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

Catalog

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

Key Features

• Qualified for Automotive ApplicationsAEC-Q100 Qualified With the Following Results:Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature RangeDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C5Wide 4.5-V to 100-V Input Voltage RangeIntegrated High-Side and Low-Side SwitchesNo Schottky Diode Required1-A Maximum Load CurrentConstant ON-Time ControlNo External Loop CompensationFast Transient ResponseSelectable DCM Buck Operation at Light LoadCCM Option Supports Multi-Output Fly-Buck™No External Ripple circuit needed (at FPWM = 0)Nearly Constant Switching FrequencyFrequency Adjustable Up to 1 MHzProgrammable Soft-Start TimePrebias Start-UpPeak Current Limiting ProtectionAdjustable Input UVLO and Hysteresis±1% Feedback Voltage ReferenceThermal Shutdown ProtectionCreate a Custom Design Using the LM5161-Q1 With theWEBENCH®Power DesignerQualified for Automotive ApplicationsAEC-Q100 Qualified With the Following Results:Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature RangeDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C5Wide 4.5-V to 100-V Input Voltage RangeIntegrated High-Side and Low-Side SwitchesNo Schottky Diode Required1-A Maximum Load CurrentConstant ON-Time ControlNo External Loop CompensationFast Transient ResponseSelectable DCM Buck Operation at Light LoadCCM Option Supports Multi-Output Fly-Buck™No External Ripple circuit needed (at FPWM = 0)Nearly Constant Switching FrequencyFrequency Adjustable Up to 1 MHzProgrammable Soft-Start TimePrebias Start-UpPeak Current Limiting ProtectionAdjustable Input UVLO and Hysteresis±1% Feedback Voltage ReferenceThermal Shutdown ProtectionCreate a Custom Design Using the LM5161-Q1 With theWEBENCH®Power Designer

Description

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. 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.