LM25088-Q1 Series

Automotive Grade 4.5-42V Wide Vin, Current Mode Non-Synchronous Buck Controller

Catalog

Automotive Grade 4.5-42V Wide Vin, Current Mode Non-Synchronous Buck Controller

Part	Function	Supplier Device Package	Output Phases	Topology	Number of Outputs	Output Type	Operating Temperature [Min]	Operating Temperature [Max]	Output Configuration	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Control Features	Frequency - Switching [Min]	Frequency - Switching [Max]	Mounting Type	Package / Case	Package / Case	Voltage - Output	Regulator Topology	Utilized IC / Part	Main Purpose	Supplied Contents	Voltage - Input [Min]	Voltage - Input [Max]	Board Type	Outputs and Type	Outputs and Type	Current - Output	Frequency - Switching	Qualification	Grade
Texas Instruments LM25088MH-1/NOPB	Step-Down	16-HTSSOP	1	Buck	1	Transistor Driver	-40 °C	125 ¯C	Positive	42 V	4.5 V	Enable Frequency Control Ramp Soft Start	50 kHz	1 MHz	Surface Mount	16-PowerTSSOP	0.173 in 4.4 mm Width
Texas Instruments LM25088MH-2/NOPB	Step-Down	16-HTSSOP	1	Buck	1	Transistor Driver	-40 °C	125 ¯C	Positive	42 V	4.5 V	Enable Frequency Control Ramp Soft Start	50 kHz	1 MHz	Surface Mount	16-PowerTSSOP	0.173 in 4.4 mm Width
Texas Instruments LM25088MHX-2/NOPB	Step-Down	16-HTSSOP	1	Buck	1	Transistor Driver	-40 °C	125 ¯C	Positive	42 V	4.5 V	Enable Frequency Control Ramp Soft Start	50 kHz	1 MHz	Surface Mount	16-PowerTSSOP	0.173 in 4.4 mm Width
Texas Instruments LM25088MH-1EVAL																		5 V	Buck	LM25088	DC/DC Step Down	Board(s)	5.5 V	36 V	Fully Populated	Non-Isolated	1	7 A	250 kHz
Texas Instruments LM25088QMHX-2/NOPB	Step-Down	16-HTSSOP	1	Buck	1	Transistor Driver	-40 °C	125 ¯C	Positive	42 V	4.5 V	Enable Frequency Control Ramp Soft Start	50 kHz	1 MHz	Surface Mount	16-PowerTSSOP	0.173 in 4.4 mm Width													AEC-Q100	Automotive
Texas Instruments LM25088QMH-2/NOPB	Step-Down	16-HTSSOP	1	Buck	1	Transistor Driver	-40 °C	125 ¯C	Positive	42 V	4.5 V	Enable Frequency Control Ramp Soft Start	50 kHz	1 MHz	Surface Mount	16-PowerTSSOP	0.173 in 4.4 mm Width													AEC-Q100	Automotive

Catalog

Automotive Grade 4.5-42V 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 42 VLow IQshutdown and standby modesHigh duty cycle ratio feature for reduced dropout voltageSpread spectrum EMI reduction (LM25088-1)Hiccup timer for overload protection (LM25088-2)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 42 VLow IQshutdown and standby modesHigh duty cycle ratio feature for reduced dropout voltageSpread spectrum EMI reduction (LM25088-1)Hiccup timer for overload protection (LM25088-2)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 LM25088 high voltage non-synchronous buck controller features all the necessary functions to implement an efficient, high-voltage buck converter using the minimum number of external components. The LM25088 can be configured to operate over an ultra-wide input voltage range of 4.5 V to 42 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 on 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 LM25088 switching frequency is programmable from 50 kHz to 1 MHz. The LM25088 is available in two versions: The LM25088-1 provides a ±5% frequency dithering function to reduce the conducted and radiated EMI while the LM25088-2 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 HTSSOP-16 pin package. The LM25088 high voltage non-synchronous buck controller features all the necessary functions to implement an efficient, high-voltage buck converter using the minimum number of external components. The LM25088 can be configured to operate over an ultra-wide input voltage range of 4.5 V to 42 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 on 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 LM25088 switching frequency is programmable from 50 kHz to 1 MHz. The LM25088 is available in two versions: The LM25088-1 provides a ±5% frequency dithering function to reduce the conducted and radiated EMI while the LM25088-2 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 HTSSOP-16 pin package.