LM5168-Q1

LM5169, LM5168 0.65-A/0.3-A, 120-V, Step-Down Converter with Fly-Buck™ Converter Capability

1Features •Designedforreliabilityinruggedapplications –Wideinputvoltagerangeof6Vto120V –Junctiontemperaturerange:–40°Cto+150°C –Fixed3-msinternalsoft-starttimer –Peakandvalleycurrent-limitprotection –InputUVLOandthermalshutdownprotection •Suitedfors

LM5168-Q1

LM516x, 0.65A/0.3A, 120V Absolute Maximum, Step-Down Converter With Fly-Buck™ Converter Capability

1Features •FunctionalSafety-Capable –Documentationavailabletoaidfunctionalsafety systemdesign •Designedforreliabilityinruggedapplications –Wideinputvoltagerangeof6Vto120V absolutemaximum –Junctiontemperaturerange:–40°Cto+150°C –Fixed3msinternalsoft-start

LM5168-Q1

具有 Fly-Buck™ 能力的汽车类 6V 至 120V 宽输入电压、300mA 直流/直流转换器; • AEC-Q100-qualified for automotive applications \n• Device temperature grade 1: –40°C to +125°C, ambient temperature range\n \n• Designed for reliable and rugged applications \n• Wide input voltage range of 6 V to 120 V\n• Junction temperature range: –40°C to +150°C\n• Fixed 3-ms internal soft-start timer\n• Peak and valley current-limit protection\n• Input UVLO and thermal shutdown protection\n \n• Suited for scalable automotive HEV/EV power supplies \n• Low minimum on and off times of 50 ns\n• Adjustable switching frequency up to 1 MHz\n• Diode emulation for high light-load efficiency\n• Auto mode with low-quiescent current (LM5164-Q1, LM5163-Q1, LM5017, and LM34927 \n \n• Integration reduces solution size and cost \n• COT mode control architecture\n• Integrated 1.9-Ω NFET buck switch\n• Integrated 0.71-Ω NFET synchronous rectifier\n• 1.2-V internal voltage reference\n• No loop compensation components\n• Internal VCC bias regulator and boot diode\n• Open-drain power-good indicator\n• 8-pin SOIC package with PowerPAD™ with 30°C/W RθJA (EVM);

The LM5169-Q1 and LM5168-Q1 synchronous buck converters are designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. A minimum controllable on time of 50 ns facilitates large step-down conversion ratios, enabling the direct step-down from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5169-Q1 operates during input voltage dips as low as 6 V, at nearly 100% duty cycle if needed, making it an excellent choice for wide input supply range industrial and high cell count battery pack applications.\n\nWith integrated high-side and low-side power MOSFETs, the LM5169-Q1 delivers up to 0.65-A of output current and the LM5168-Q1 delivers up to 0.3-A of output current. A constant on time (COT) control architecture provides nearly constant switching frequency with excellent load and line transient response. The LM5169-Q1 is available in FPWM or Auto mode operation. FPWM mode ensures forced CCM operation across the entire load range supporting isolated Fly-buck operation. Auto mode enables ultra-low IQ and diode emulation mode operation for high light-load efficiency.

LM5168-Q1

LM5169/LM5168 0.65-A/0.3-A, 120-V, Step-Down Converter with Fly-Buck??Converter Capability

LM5168-Q1

LM5169-Q1/LM5168-Q1 0.65-A/0.3-A, 120-V, Step-Down Converter with Fly-Buck??Converter Capability