LM5155-Q1 Series

2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller, AEC-Q100 qualified

Catalog

2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller, AEC-Q100 qualified

Part	Outputs and Type	Outputs and Type	Main Purpose	Current - Output	Regulator Topology	Supplied Contents	Utilized IC / Part	Voltage - Output	Board Type	Voltage - Input [Max]	Voltage - Input [Min]	Frequency - Switching	Function	Output Type	Qualification	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]	Frequency - Switching [Min]	Frequency - Switching [Max]	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Supplier Device Package	Mounting Type	Grade	Output Configuration	Output Phases	Control Features	Package / Case	Duty Cycle (Max) [Max]	Topology
Texas Instruments LM5155EVM-SEPIC	Non-Isolated	1	DC/DC Step Up	2 A	Boost SEPIC	Board(s)	LM5155-Q1	12 V	Fully Populated	18 V	6 V	2.2 MHz
Texas Instruments LM5155QUDSSTQ1													Step-Up Step-Up/Step-Down	Transistor Driver	AEC-Q100	1	-40 °C	125 °C	100 kHz	2.2 MHz	16 V 45 V	2.97 V 3.5 V	12-WSON (3x2)	Surface Mount	Automotive	Positive	1	Current Limit Enable Frequency Control Power Good Soft Start Sync	12-WFDFN Exposed Pad	93 %	Boost Flyback SEPIC
Texas Instruments LM5155DSST													Step-Up Step-Up/Step-Down	Transistor Driver		1	-40 °C	125 ¯C	100 kHz	2.2 MHz	45 V	2.97 V	12-WSON (3x2)	Surface Mount		Positive	1	Soft Start	12-WFDFN Exposed Pad	96 %	Boost Flyback SEPIC
Texas Instruments LM5155DSSR													Step-Up Step-Up/Step-Down	Transistor Driver		1	-40 °C	125 ¯C	100 kHz	2.2 MHz	45 V	2.97 V	12-WSON (3x2)	Surface Mount		Positive	1	Soft Start	12-WFDFN Exposed Pad	93 %	Boost Flyback SEPIC
Texas Instruments LM5155QDSSTQ1													Step-Up Step-Up/Step-Down	Transistor Driver	AEC-Q100	1	-40 °C	150 °C	100 kHz	2.2 MHz	45 V	2.97 V	12-WSON (3x2)	Surface Mount Wettable Flank	Automotive	Positive	1	Soft Start	12-WFDFN Exposed Pad	93 %	Boost Flyback SEPIC
Texas Instruments LM5155QUDSSRQ1													Step-Up Step-Up/Step-Down	Transistor Driver	AEC-Q100	1	-40 °C	125 °C	100 kHz	2.2 MHz	16 V 45 V	2.97 V 3.5 V	12-WSON (3x2)	Surface Mount	Automotive	Positive	1	Current Limit Enable Frequency Control Power Good Soft Start Sync	12-WFDFN Exposed Pad	93 %	Boost Flyback SEPIC
Texas Instruments LM5155EVM-BST	Non-Isolated	1	DC/DC Step Up	2 A	Boost	Board(s)	LM5155	24 V	Fully Populated	18 V	6 V	440 kHz

Catalog

2.2-MHz wide VIN, 1.5-A MOSFET driver, non-synchronous boost controller, AEC-Q100 qualified

Key Features

• AEC-Q100 qualified for automotive applicationsTemperature grade 1: –40°C to +125°C T AFunctional Safety-CapableDocumentation available to aid functional safety system designWide input operating range for car and portable battery applications3.5-V to 45-V Operating range2.97-V to 16-V When BIAS = VCCMinimum boost supply voltage 1.5 V when BIAS ≥ 3.5 VInput transient protection up to 50 VMinimized battery drainLow shutdown current (I Q ≤ 2.6 µA)Low operating current (I Q ≤ 480 µA)Small solution size and low costMaximum switching frequency of 2.2 MHz12-Pin WSON package (3 mm × 2 mm) with wettable flanks and non-wettable flank optionIntegrated error amplifier allows primary-side regulation without optocoupler (flyback)Minimized undershoot during cranking (start-stop application)Higher efficiency with low-power dissipation100-mV ±7% Low current limit thresholdStrong 1.5-A peak standard MOSFET driverSupports external VCC supplyAvoid AM band interference and crosstalkOptional clock synchronizationDynamically programmable switching frequency from 100 kHz to 2.2 MHzIntegrated protection featuresConstant peak current limiting over input voltageOptional hiccup mode short-circuit protection (see the Device Comparison Table)Programmable line UVLOOVP protectionThermal shutdownAccurate ±1% accuracy feedback referenceProgrammable extra slope compensationAdjustable soft startPGOOD indicatorCreate a custom design using the LM5155x with theWEBENCH power designerAEC-Q100 qualified for automotive applicationsTemperature grade 1: –40°C to +125°C T AFunctional Safety-CapableDocumentation available to aid functional safety system designWide input operating range for car and portable battery applications3.5-V to 45-V Operating range2.97-V to 16-V When BIAS = VCCMinimum boost supply voltage 1.5 V when BIAS ≥ 3.5 VInput transient protection up to 50 VMinimized battery drainLow shutdown current (I Q ≤ 2.6 µA)Low operating current (I Q ≤ 480 µA)Small solution size and low costMaximum switching frequency of 2.2 MHz12-Pin WSON package (3 mm × 2 mm) with wettable flanks and non-wettable flank optionIntegrated error amplifier allows primary-side regulation without optocoupler (flyback)Minimized undershoot during cranking (start-stop application)Higher efficiency with low-power dissipation100-mV ±7% Low current limit thresholdStrong 1.5-A peak standard MOSFET driverSupports external VCC supplyAvoid AM band interference and crosstalkOptional clock synchronizationDynamically programmable switching frequency from 100 kHz to 2.2 MHzIntegrated protection featuresConstant peak current limiting over input voltageOptional hiccup mode short-circuit protection (see the Device Comparison Table)Programmable line UVLOOVP protectionThermal shutdownAccurate ±1% accuracy feedback referenceProgrammable extra slope compensationAdjustable soft startPGOOD indicatorCreate a custom design using the LM5155x with theWEBENCH power designer

Description

The LM5155x-Q1 (LM5155-Q1 and LM51551-Q1) is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies. The LM5155x-Q1 can start up from a 1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.5 V. The LM5155x-Q1 (LM5155-Q1 and LM51551-Q1) is a wide input range, non-synchronous boost controller that uses peak current mode control. The device can be used in boost, SEPIC, and flyback topologies. The LM5155x-Q1 can start up from a 1-cell battery with a minimum of 2.97 V if the BIAS pin is connected to the VCC pin. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.5 V.