LM25141-Q1 Series

Automotive 2.2-MHz, low-IQ synchronous buck controller with frequency spread spectrum

Catalog

Automotive 2.2-MHz, low-IQ synchronous buck controller with frequency spread spectrum

Part	Operating Temperature [Min]	Operating Temperature [Max]	Control Features	Frequency - Switching	Grade	Output Configuration	Topology	Number of Outputs	Output Type	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Output Phases	Duty Cycle (Max) [Max]	Supplier Device Package	Qualification	Mounting Type	Function	Package / Case
Texas Instruments LM25141QRGERQ1	-40 °C	125 °C	Current Limit Enable Frequency Control	2.2 MHz	Automotive	Positive	Half-Bridge	1	Transistor Driver	3.8 V	42 V	1	50 %	24-VQFN (4x4)	AEC-Q101	Surface Mount	Step-Down	24-VFQFN Exposed Pad
Texas Instruments LM25141RGER	-40 °C	125 °C	Current Limit Enable Frequency Control	2.2 MHz	Automotive	Positive	Half-Bridge	1	Transistor Driver	3.8 V	42 V	1	50 %	24-VQFN (4x4)	AEC-Q101	Surface Mount	Step-Down	24-VFQFN Exposed Pad
Texas Instruments LM25141QRGETQ1	-40 °C	125 °C	Current Limit Enable Frequency Control	2.2 MHz	Automotive	Positive	Half-Bridge	1	Transistor Driver	3.8 V	42 V	1	50 %	24-VQFN (4x4)	AEC-Q101	Surface Mount	Step-Down	24-VFQFN Exposed Pad

Catalog

Automotive 2.2-MHz, low-IQ synchronous buck controller with frequency spread spectrum

Key Features

• AEC-Q100 Qualified for Automotive Applications:Device Temperature Grade 1: –40°C to +125°C Ambient Operating TemperatureDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C4BVIN3.8 V to 42 V (47 V Absolute Maximum)Output: Fixed 3.3 V, 5 V, or Adjustable From1.5 V to 15 V With ±0.8% AccuracyOptional Frequency Shift by Varying an Analog Voltage or RT ResistorMeets CISPR 25 / EN 55025 EMI StandardsFixed 2.2-MHz or 440-kHz Switching Frequency With ±5% AccuracyHigh-Side and Low-Side Gate Drive With Slew Rate ControlOptional Spread SpectrumOptional Synchronization to an External ClockShutdown Mode IQ: 10 µA TypicalLow Standby Mode IQ: 35 µA Typical75-mV Current Limit Threshold With ±0.9% AccuracyExternal Resistor or DCR Current SensingOutput Enable Logic InputHiccup Mode for Sustained OverloadPower-Good Indication OutputSelectable Diode Emulation or Forced PWMVQFN-24 Package With Wettable FlanksCreate a Custom Design Using the LM25141-Q1 With theWEBENCH®Power DesignerAEC-Q100 Qualified for Automotive Applications:Device Temperature Grade 1: –40°C to +125°C Ambient Operating TemperatureDevice HBM ESD Classification Level 2Device CDM ESD Classification Level C4BVIN3.8 V to 42 V (47 V Absolute Maximum)Output: Fixed 3.3 V, 5 V, or Adjustable From1.5 V to 15 V With ±0.8% AccuracyOptional Frequency Shift by Varying an Analog Voltage or RT ResistorMeets CISPR 25 / EN 55025 EMI StandardsFixed 2.2-MHz or 440-kHz Switching Frequency With ±5% AccuracyHigh-Side and Low-Side Gate Drive With Slew Rate ControlOptional Spread SpectrumOptional Synchronization to an External ClockShutdown Mode IQ: 10 µA TypicalLow Standby Mode IQ: 35 µA Typical75-mV Current Limit Threshold With ±0.9% AccuracyExternal Resistor or DCR Current SensingOutput Enable Logic InputHiccup Mode for Sustained OverloadPower-Good Indication OutputSelectable Diode Emulation or Forced PWMVQFN-24 Package With Wettable FlanksCreate a Custom Design Using the LM25141-Q1 With theWEBENCH®Power Designer

Description

The LM25141-Q1 is a synchronous buck controller, intended for high-voltage, wide-VIN, step-down regulator applications. The control method is peak current-mode control. Current-mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation. The LM25141-Q1 features slew rate control to simplify the compliance with CISPR and automotive EMI requirements. The LM25141-Q1 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate drivers with slew rate control can be adjusted to reduce EMI. In light or no-load conditions, the LM25141-Q1 operates in skip cycle mode for improved low power efficiency. The LM25141-Q1 has a high-voltage bias regulator with automatic switch-over to an external bias to reduce the IQcurrent from VIN. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup-mode fault protection for sustained overload, and power-good output. The LM25141-Q1 is a synchronous buck controller, intended for high-voltage, wide-VIN, step-down regulator applications. The control method is peak current-mode control. Current-mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation. The LM25141-Q1 features slew rate control to simplify the compliance with CISPR and automotive EMI requirements. The LM25141-Q1 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate drivers with slew rate control can be adjusted to reduce EMI. In light or no-load conditions, the LM25141-Q1 operates in skip cycle mode for improved low power efficiency. The LM25141-Q1 has a high-voltage bias regulator with automatic switch-over to an external bias to reduce the IQcurrent from VIN. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup-mode fault protection for sustained overload, and power-good output.