LM5088-Q1 Series

Automotive Grade 4.5-75V Wide Vin, Current Mode Non-Synchronous Buck Controller

Catalog

Automotive Grade 4.5-75V Wide Vin, Current Mode Non-Synchronous Buck Controller

Part	Frequency - Switching [Min]	Frequency - Switching [Max]	Control Features	Output Type	Output Configuration	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Number of Outputs	Package / Case	Package / Case	Grade	Topology	Function	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Output Phases	Mounting Type	Qualification	Frequency - Switching	Utilized IC / Part	Supplied Contents	Current - Output	Regulator Topology	Board Type	Voltage - Output	Outputs and Type	Outputs and Type	Voltage - Input [Min]	Voltage - Input [Max]	Main Purpose	Contents
Texas Instruments LM5088QMH-2/NOPB	50 kHz	1 MHz	Enable Frequency Control Ramp Soft Start	Transistor Driver	Positive	75 V	4.5 V	1	16-PowerTSSOP	0.173 in 4.4 mm Width	Automotive	Buck	Step-Down	-40 °C	125 ¯C	16-HTSSOP	1	Surface Mount	AEC-Q100
Texas Instruments LM5088QMHX-1/NOPB	50 kHz	1 MHz	Enable Frequency Control Ramp Soft Start	Transistor Driver	Positive	75 V	4.5 V	1	16-PowerTSSOP	0.173 in 4.4 mm Width	Automotive	Buck	Step-Down	-40 °C	125 ¯C	16-HTSSOP	1	Surface Mount	AEC-Q100
Texas Instruments LM5088MH-1EVAL/NOPB																				250 kHz	LM5088	Board(s)	7 A	Buck	Fully Populated	5 V	Non-Isolated	1	4.5 V 5.5 V	55 V 75 V	DC/DC Step Down
Texas Instruments LM5088MH-2EVAL/NOPB																				250 kHz	LM5088	Board(s)	7 A	Buck	Fully Populated	5 V	1 Non-Isolated Output Non-Isolated	1	5.5 V	55 V	DC/DC Step Down	Board(s)
Texas Instruments LM5088QMH-1/NOPB	50 kHz	1 MHz	Enable Frequency Control Ramp Soft Start	Transistor Driver	Positive	75 V	4.5 V	1	16-PowerTSSOP	0.173 in 4.4 mm Width	Automotive	Buck	Step-Down	-40 °C	125 ¯C	16-HTSSOP	1	Surface Mount	AEC-Q100
Texas Instruments LM5088MH-2/NOPB	50 kHz	1 MHz	Enable Frequency Control Ramp Soft Start	Transistor Driver	Positive	75 V	4.5 V	1	16-PowerTSSOP	0.173 in 4.4 mm Width		Buck	Step-Down	-40 °C	125 ¯C	16-HTSSOP	1	Surface Mount
Texas Instruments LM5088MH-2EVAL																				250 kHz	LM5088	Board(s)	7 A	Buck	Fully Populated	5 V	Non-Isolated	1	5.5 V	55 V	DC/DC Step Down
Texas Instruments LM5088MHX-1/NOPB	50 kHz	1 MHz	Enable Frequency Control Ramp Soft Start	Transistor Driver	Positive	75 V	4.5 V	1	16-PowerTSSOP	0.173 in 4.4 mm Width		Buck	Step-Down	-40 °C	125 ¯C	16-HTSSOP	1	Surface Mount
Texas Instruments LM5088MH-1/NOPB	50 kHz	1 MHz	Enable Frequency Control Ramp Soft Start	Transistor Driver	Positive	75 V	4.5 V	1	16-PowerTSSOP	0.173 in 4.4 mm Width		Buck	Step-Down	-40 °C	125 ¯C	16-HTSSOP	1	Surface Mount
Texas Instruments LM5088MHX-2/NOPB	50 kHz	1 MHz	Enable Frequency Control Ramp Soft Start	Transistor Driver	Positive	75 V	4.5 V	1	16-PowerTSSOP	0.173 in 4.4 mm Width		Buck	Step-Down	-40 °C	125 ¯C	16-HTSSOP	1	Surface Mount

Catalog

Automotive Grade 4.5-75V Wide Vin, Current Mode Non-Synchronous Buck Controller

Key Features

• AEC-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 C5Emulated current mode controlDrives external high-side N-channel MOSFETUltra-wide input voltage range from 4.5 V to 75 VLow IQshutdown and standby modesHigh duty cycle ratio feature for reduced dropout voltageSpread spectrum EMI reduction (LM5088-1)Hiccup timer for overload protection (LM5088-2)Adjustable output voltage from 1.205 V with 1.5% feedback reference accuracyWide bandwidth error amplifierSingle resistor oscillator frequency settingOscillator synchronization capabilityProgrammable soft startHigh voltage, low dropout bias regulatorThermal shutdown protection16-pin HTSSOP packageAEC-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 C5Emulated current mode controlDrives external high-side N-channel MOSFETUltra-wide input voltage range from 4.5 V to 75 VLow IQshutdown and standby modesHigh duty cycle ratio feature for reduced dropout voltageSpread spectrum EMI reduction (LM5088-1)Hiccup timer for overload protection (LM5088-2)Adjustable output voltage from 1.205 V with 1.5% feedback reference accuracyWide bandwidth error amplifierSingle resistor oscillator frequency settingOscillator synchronization capabilityProgrammable soft startHigh voltage, low dropout bias regulatorThermal shutdown protection16-pin HTSSOP package

Description

The LM5088 high voltage non-synchronous buck controller features all the necessary functions to implement an efficient, high-voltage buck converter using a minimum number of external components. The LM5088 can be configured to operate over an ultra-wide input voltage range of 4.5 V to 75 V. This easy-to-use controller includes a level-shifted gate driver capable of controlling an external N-channel buck switch. The control method is based upon peak current mode control utilizing an emulated current ramp. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage and low output voltage applications. The LM5088 switching frequency is programmable from 50 kHz to 1 MHz. The LM5088 is available in two versions: The LM5088-1 provides a ±5% frequency dithering function to reduce the conducted and radiated EMI, while the LM5088-2 provides a versatile restart timer for overload protection. Additional features include a low dropout bias regulator, tri-level enable input to control shutdown and standby modes, soft start, and oscillator synchronization capability. The device is available in a thermally enhanced 16-pin HTSSOP package. The LM5088 high voltage non-synchronous buck controller features all the necessary functions to implement an efficient, high-voltage buck converter using a minimum number of external components. The LM5088 can be configured to operate over an ultra-wide input voltage range of 4.5 V to 75 V. This easy-to-use controller includes a level-shifted gate driver capable of controlling an external N-channel buck switch. The control method is based upon peak current mode control utilizing an emulated current ramp. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage and low output voltage applications. The LM5088 switching frequency is programmable from 50 kHz to 1 MHz. The LM5088 is available in two versions: The LM5088-1 provides a ±5% frequency dithering function to reduce the conducted and radiated EMI, while the LM5088-2 provides a versatile restart timer for overload protection. Additional features include a low dropout bias regulator, tri-level enable input to control shutdown and standby modes, soft start, and oscillator synchronization capability. The device is available in a thermally enhanced 16-pin HTSSOP package.