LM51501-Q1 Series

Automotive 1.5-V to 42-V VIN, low IQ boost controller with 6V, 6.5V, 9.5V, 11.5V output options

Catalog

Automotive 1.5-V to 42-V VIN, low IQ boost controller with 6V, 6.5V, 9.5V, 11.5V output options

Part	Grade	Supplier Device Package	Mounting Type	Output Configuration	Topology	Output Type	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Output Phases	Function	Package / Case	Frequency - Switching [Min]	Frequency - Switching [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Control Features	Number of Outputs	Duty Cycle (Max) [Max]	Qualification
Texas Instruments LM51501QWRUMTQ1	Automotive	16-WQFN (4x4)	Surface Mount	Positive	Boost	Transistor Driver	42 V	1.5 V	1	Step-Up	16-WQFN Exposed Pad	220 kHz	2.3 MHz	-40 °C	125 ¯C	Current Limit Enable Frequency Control Sync	1	93 %	AEC-Q100
Texas Instruments LM51501QRUMTQ1	Automotive	16-WQFN (4x4)	Surface Mount	Positive	Boost	Transistor Driver	42 V	1.5 V	1	Step-Up	16-WQFN Exposed Pad	220 kHz	2.3 MHz	-40 °C	150 °C	Current Limit Enable Frequency Control Sync	1	93 %	AEC-Q100
Texas Instruments LM51501QURUMRQ1	Automotive	16-WQFN (4x4)	Surface Mount	Positive	Boost	Transistor Driver	42 V	1.5 V	1	Step-Up	16-WQFN Exposed Pad	220 kHz	2.3 MHz	-40 °C	150 °C	Current Limit Enable Frequency Control Sync	1	93 %	AEC-Q100
Texas Instruments LM51501QRUMRQ1	Automotive	16-WQFN (4x4)	Surface Mount	Positive	Boost	Transistor Driver	42 V	1.5 V	1	Step-Up	16-WQFN Exposed Pad	220 kHz	2.3 MHz	-40 °C	150 °C	Current Limit Enable Frequency Control Sync	1	93 %	AEC-Q100

Catalog

Automotive 1.5-V to 42-V VIN, low IQ boost controller with 6V, 6.5V, 9.5V, 11.5V output options

Key Features

• AEC-Q100 qualified:Device temperature grade 1: –40°C to +125°C ambient operating temperature rangeDevice HBM ESD classification level 2Device CDM ESD classification level C4BFunctional Safety-CapableDocumentation available to aid functional safety system designWide VIN input range from 1.5 V to 42 V when VOUT ≥ 5 V (65-V absolute maximum)Low shutdown current (IQ≤ 5 µA)Low standby current (IQ≤ 15 µA)Four programmable output voltage options and two selectable configurations6.0 V, 6.5 V, 9.5 V, or 11.5 VStart-stop or e-call configurationsAdjustable switching frequency from 220 kHz to 2.3 MHzAutomatic wake-up and standby mode transitionOptional clock synchronizationBoost status indicator1.5-A peak MOSFET gate driverAdjustable cycle-by-cycle current limitThermal shutdown16-pin WQFN with wettable and non-wettable flank optionsCreate a custom design using the LM51501-Q1 with theWEBENCH Power DesignerAEC-Q100 qualified:Device temperature grade 1: –40°C to +125°C ambient operating temperature rangeDevice HBM ESD classification level 2Device CDM ESD classification level C4BFunctional Safety-CapableDocumentation available to aid functional safety system designWide VIN input range from 1.5 V to 42 V when VOUT ≥ 5 V (65-V absolute maximum)Low shutdown current (IQ≤ 5 µA)Low standby current (IQ≤ 15 µA)Four programmable output voltage options and two selectable configurations6.0 V, 6.5 V, 9.5 V, or 11.5 VStart-stop or e-call configurationsAdjustable switching frequency from 220 kHz to 2.3 MHzAutomatic wake-up and standby mode transitionOptional clock synchronizationBoost status indicator1.5-A peak MOSFET gate driverAdjustable cycle-by-cycle current limitThermal shutdown16-pin WQFN with wettable and non-wettable flank optionsCreate a custom design using the LM51501-Q1 with theWEBENCH Power Designer

Description

The LM51501-Q1 is a wide input range automatic boost controller. The device can be used to maintain a stable output voltage during automotive cranking from a vehicle battery or from a backup battery. The LM51501-Q1 switching frequency is programmed by a resistor from 220 kHz to 2.3 MHz. Fast switching (≥ 2.2 MHz) minimizes AM band interference and allows for a small solution size and fast transient response. The LM51501-Q1 operates in low IQstandby mode when the input or output voltage is above the preset standby thresholds and automatically wakes up when the output voltage drops below the preset wake-up threshold. The device transitions in and out of low IQstandby mode to extend battery life at light load. A single resistor programs the target output regulation voltage as well as the configuration. Additional features include low shutdown current, boost status indicator, adjustable cycle-by-cycle current limit, and thermal shutdown. A status indicator can be used to control a circuit to bypass the diode when the part is not boosting in order to reduce power dissipation. In E-call mode, the device can be used to control a disconnect switch to protect the backup-battery. The LM51501-Q1 is a wide input range automatic boost controller. The device can be used to maintain a stable output voltage during automotive cranking from a vehicle battery or from a backup battery. The LM51501-Q1 switching frequency is programmed by a resistor from 220 kHz to 2.3 MHz. Fast switching (≥ 2.2 MHz) minimizes AM band interference and allows for a small solution size and fast transient response. The LM51501-Q1 operates in low IQstandby mode when the input or output voltage is above the preset standby thresholds and automatically wakes up when the output voltage drops below the preset wake-up threshold. The device transitions in and out of low IQstandby mode to extend battery life at light load. A single resistor programs the target output regulation voltage as well as the configuration. Additional features include low shutdown current, boost status indicator, adjustable cycle-by-cycle current limit, and thermal shutdown. A status indicator can be used to control a circuit to bypass the diode when the part is not boosting in order to reduce power dissipation. In E-call mode, the device can be used to control a disconnect switch to protect the backup-battery.