LM5118 Series

3-V to 75-V wide VIN, current mode non-synchronous buck-boost controller

Catalog

3-V to 75-V wide VIN, current mode non-synchronous buck-boost controller

Part	Function	Output Type	Output Phases	Number of Outputs	Grade	Supplier Device Package	Mounting Type	Package / Case	Package / Case [custom]	Package / Case	Topology	Control Features	Frequency - Switching	Duty Cycle (Max)	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Qualification	Output Configuration
Texas Instruments LM5118Q1MHX/NOPB	Step-Down, Step-Up/Step-Down	Transistor Driver	1	1	Automotive	20-HTSSOP	Surface Mount	20-PowerTSSOP	4.4 mm	0.173 in	Buck, Buck-Boost	Enable, Frequency Control, Ramp, Soft Start	200 kHz, 515 kHz	80 %	-40 °C	125 ¯C	3 V	75 V	AEC-Q100	Positive
Texas Instruments LM5118MHX/NOPB	Step-Down, Step-Up/Step-Down	Transistor Driver	1	1		20-HTSSOP	Surface Mount	20-PowerTSSOP	4.4 mm	0.173 in	Buck, Buck-Boost	Enable, Frequency Control, Ramp, Soft Start	200 kHz, 515 kHz	80 %	-40 °C	125 ¯C	3 V	75 V		Positive
Texas Instruments LM5118Q1MH/NOPB	Step-Down, Step-Up/Step-Down	Transistor Driver	1	1	Automotive	20-HTSSOP	Surface Mount	20-PowerTSSOP	4.4 mm	0.173 in	Buck, Buck-Boost	Enable, Frequency Control, Ramp, Soft Start	200 kHz, 515 kHz	80 %	-40 °C	125 ¯C	3 V	75 V	AEC-Q100	Positive
Texas Instruments LM5118MH/NOPB	Step-Down, Step-Up/Step-Down	Transistor Driver	1	1		20-HTSSOP	Surface Mount	20-PowerTSSOP	4.4 mm	0.173 in	Buck, Buck-Boost	Enable, Frequency Control, Ramp, Soft Start	200 kHz, 515 kHz	80 %	-40 °C	125 ¯C	3 V	75 V		Positive

Catalog

3-V to 75-V wide VIN, current mode non-synchronous buck-boost controller

Key Features

• AEC-Q100 Qualified for Automotive ApplicationsDevice Temperature Grade 1: –40°C to +125°C Ambient Operating TemperatureDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C6Ultra-Wide Input Voltage Range From 3 V to 75 VEmulated Peak Current Mode ControlSmooth Transition Between Step-Down and Step-Up ModesSwitching Frequency Programmable to 500 KHzOscillator Synchronization CapabilityInternal High Voltage Bias RegulatorIntegrated High and Low-Side Gate DriversProgrammable Soft-Start TimeUltra-Low Shutdown CurrentEnable Input Wide Bandwidth Error Amplifier1.5% Feedback Reference AccuracyThermal ShutdownPackage: 20-Pin HTSSOP (Exposed Pad)Create a Custom Design Using the LM5118-Q1 With theWEBENCH®Power DesignerAEC-Q100 Qualified for Automotive ApplicationsDevice Temperature Grade 1: –40°C to +125°C Ambient Operating TemperatureDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C6Ultra-Wide Input Voltage Range From 3 V to 75 VEmulated Peak Current Mode ControlSmooth Transition Between Step-Down and Step-Up ModesSwitching Frequency Programmable to 500 KHzOscillator Synchronization CapabilityInternal High Voltage Bias RegulatorIntegrated High and Low-Side Gate DriversProgrammable Soft-Start TimeUltra-Low Shutdown CurrentEnable Input Wide Bandwidth Error Amplifier1.5% Feedback Reference AccuracyThermal ShutdownPackage: 20-Pin HTSSOP (Exposed Pad)Create a Custom Design Using the LM5118-Q1 With theWEBENCH®Power Designer

Description

The LM5118-Q1 wide voltage range Buck-Boost switching regulator controller features all of the functions necessary to implement a high-performance, cost-efficient Buck-Boost regulator using a minimum of external components. The Buck-Boost topology maintains output voltage regulation when the input voltage is either less than or greater than the output voltage, making it especially suitable for automotive applications. The LM5118-Q1 operates as a buck regulator while the input voltage is sufficiently greater than the regulated output voltage and gradually transitions to the buck-boost mode as the input voltage approaches the output. This dual-mode approach maintains regulation over a wide range of input voltages with optimal conversion efficiency in the buck mode and a glitch-free output during mode transitions. This easy-to-use controller includes drivers for the high-side buck MOSFET and the low-side boost MOSFET. The regulators control method is based upon current mode control using an emulated current ramp. Emulated current mode control reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of the very small duty cycles necessary in high input voltage applications. Additional protection features include current limit, thermal shutdown and an enable input. The device is available in a power-enhanced, 20-pin HTSSOP package featuring an exposed die attach pad to aid thermal dissipation. The LM5118-Q1 wide voltage range Buck-Boost switching regulator controller features all of the functions necessary to implement a high-performance, cost-efficient Buck-Boost regulator using a minimum of external components. The Buck-Boost topology maintains output voltage regulation when the input voltage is either less than or greater than the output voltage, making it especially suitable for automotive applications. The LM5118-Q1 operates as a buck regulator while the input voltage is sufficiently greater than the regulated output voltage and gradually transitions to the buck-boost mode as the input voltage approaches the output. This dual-mode approach maintains regulation over a wide range of input voltages with optimal conversion efficiency in the buck mode and a glitch-free output during mode transitions. This easy-to-use controller includes drivers for the high-side buck MOSFET and the low-side boost MOSFET. The regulators control method is based upon current mode control using an emulated current ramp. Emulated current mode control reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of the very small duty cycles necessary in high input voltage applications. Additional protection features include current limit, thermal shutdown and an enable input. The device is available in a power-enhanced, 20-pin HTSSOP package featuring an exposed die attach pad to aid thermal dissipation.