LM5168-Q1 Series

Automotive 6-V to 120-V Wide VIN, 300-mA DC-DC converter with Fly-Buck™ capability

Catalog

Automotive 6-V to 120-V Wide VIN, 300-mA DC-DC converter with Fly-Buck™ capability

Part	Operating Temperature [Max]	Operating Temperature [Min]	Grade	Package / Case [y]	Package / Case [x]	Package / Case	Frequency - Switching [Max]	Frequency - Switching [Min]	Function	Voltage - Output (Min/Fixed)	Current - Output	Qualification	Mounting Type	Topology	Voltage - Input (Min) [Min]	Voltage - Input (Max) [Max]	Output Type	Supplier Device Package	Output Configuration	Voltage - Output (Max) [Max]	Number of Outputs
Texas Instruments LM5168PQDDARQ1	150 °C	-40 °C	Automotive	3.9 mm	0.154 in	8-PowerSOIC	1 MHz	100 kHz	Step-Down	1.2 V	300 mA	AEC-Q100	Surface Mount	Buck	6 V	120 V	Adjustable	8-SO PowerPad	Positive	120 V	1
Texas Instruments LM5168PDDAR	150 °C	-40 °C		3.9 mm	0.154 in	8-PowerSOIC	1 MHz	100 kHz	Step-Down	1.2 V	300 mA		Surface Mount	Buck	6 V	120 V	Adjustable	8-SO PowerPad	Positive	120 V	1
Texas Instruments LM5168FQDDARQ1	150 °C	-40 °C	Automotive	3.9 mm	0.154 in	8-PowerSOIC	1 MHz	100 kHz	Step-Down	1.2 V	300 mA	AEC-Q100	Surface Mount	Buck	6 V	120 V	Adjustable	8-SO PowerPad	Positive	120 V	1
Texas Instruments LM5168FDDAR	150 °C	-40 °C		3.9 mm	0.154 in	8-PowerSOIC	1 MHz	100 kHz	Step-Down Step-Up/Step-Down	1.2 V	300 mA		Surface Mount		6 V	120 V	Adjustable	8-SO PowerPad	Positive	120 V	1

Catalog

Automotive 6-V to 120-V Wide VIN, 300-mA DC-DC converter with Fly-Buck™ capability

Key Features

• Functional Safety-CapableDocumentation available to aid functional safety system designDesigned for reliability in rugged applicationsWide input voltage range of 6V to 120V absolute maximumJunction temperature range: –40°C to +150°CFixed 3ms internal soft-start timerPeak and valley current-limit protectionInput UVLO and thermal shutdown protectionDesigned for scalable industrial power supplies and battery packsLow minimum on and off times of 50nsAdjustable switching frequency up to 1MHzDiode emulation for high light-load efficiencyAuto mode with low quiescent current (< 10µA)FPWM for Fly-Buck converter capability3µA shutdown quiescent currentPin-to-pin compatible withLM5164-Q1,LM5163-Q1, andLM5013-Q1Similar pinout and functionality toLM5017andLM34927.Integration reduces design size and costCOT mode control architectureIntegrated 1.9Ω NFET buck switchIntegrated 0.71Ω NFET synchronous rectifier1.2V internal voltage referenceNo loop compensation componentsInternal VCC bias regulator and boot diodeOpen-drain power-good indicatorPackage options: SOIC PowerPAD™-8 integrated circuit package or WSON-8 packageFunctional Safety-CapableDocumentation available to aid functional safety system designDesigned for reliability in rugged applicationsWide input voltage range of 6V to 120V absolute maximumJunction temperature range: –40°C to +150°CFixed 3ms internal soft-start timerPeak and valley current-limit protectionInput UVLO and thermal shutdown protectionDesigned for scalable industrial power supplies and battery packsLow minimum on and off times of 50nsAdjustable switching frequency up to 1MHzDiode emulation for high light-load efficiencyAuto mode with low quiescent current (< 10µA)FPWM for Fly-Buck converter capability3µA shutdown quiescent currentPin-to-pin compatible withLM5164-Q1,LM5163-Q1, andLM5013-Q1Similar pinout and functionality toLM5017andLM34927.Integration reduces design size and costCOT mode control architectureIntegrated 1.9Ω NFET buck switchIntegrated 0.71Ω NFET synchronous rectifier1.2V internal voltage referenceNo loop compensation componentsInternal VCC bias regulator and boot diodeOpen-drain power-good indicatorPackage options: SOIC PowerPAD™-8 integrated circuit package or WSON-8 package

Description

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 LM516x -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. With 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 LM516x -Q1 is available in FPWM or auto mode versions. FPWM mode provides forced CCM operation across the entire load range supporting isolated fly-buck converter applications. Auto mode enables ultra-low IQand diode emulation mode operation for high light-load efficiency. 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 LM516x -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. With 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 LM516x -Q1 is available in FPWM or auto mode versions. FPWM mode provides forced CCM operation across the entire load range supporting isolated fly-buck converter applications. Auto mode enables ultra-low IQand diode emulation mode operation for high light-load efficiency.