LP87745-Q1 Series

Automotive three 3-A low-noise buck converter, IO LDO & 5-V boost converter PMIC for radar MMICs

Catalog

Automotive three 3-A low-noise buck converter, IO LDO & 5-V boost converter PMIC for radar MMICs

Part	Supplier Device Package [y]	Supplier Device Package	Supplier Device Package [x]	Frequency - Switching	w/Sequencer	Grade	Voltage/Current - Output 3 [Min]	Voltage/Current - Output 3	Voltage/Current - Output 3 [Max]	Topology	Mounting Type	w/LED Driver	Voltage/Current - Output 1	Voltage/Current - Output 1 [Min]	Voltage/Current - Output 1 [Max]	Package / Case	Operating Temperature [Min]	Operating Temperature [Max]	Voltage/Current - Output 2 [Min]	Voltage/Current - Output 2 [Max]	Voltage/Current - Output 2	Qualification	Voltage - Supply [Max]	Voltage - Supply [Min]	w/Supervisor	Number of Outputs
Texas Instruments LP87745101RXVRQ1	5	28-VQFN-HR	4.5	4.4 MHz 8.8 MHz 17.6 MHz		Automotive	0.9 V	3 A	1.9 V	Linear (LDO) (1) Step-Down (Buck) (3) Step-Up (Boost) (1)	Surface Mount Wettable Flank		3 A	0.9 V	1.9 V	28-PowerVFQFN	-40 °C	125 °C	0.9 V	1.9 V	3 A	AEC-Q100	4 V	3 V		5

Catalog

Automotive three 3-A low-noise buck converter, IO LDO & 5-V boost converter PMIC for radar MMICs

Key Features

• AEC-Q100 qualified with the following results:Device temperature grade 1: –40°C to +125°C ambient operating temperatureFunctional safety-compliant deviceDeveloped for functional safety applicationsDocumentation available to aid ISO 26262 functional safety system design up to ASIL-C / SIL-2Input supply overvoltage and undervoltage monitoringRegulator output overvoltage and undervoltage monitoringOvervoltage and undervoltage monitoring for one external railQ&A watchdogLevel or PWM error signal monitor (ESM)BIST and CRCInput voltage: 3.3V nominal (3V to 4V range)Three low-noise step-down DC/DC converters:Output voltage: 0.9V to 1.9V, 0.8V (BUCK3), 0.82V (BUCK3)Maximum output current: 3A/ 3A/ 3ASwitching frequency: 4.4MHz, 8.8MHz, and 17.6MHz5V boost converterMaximum output current: 350mA150mA LDOOutput voltage 1.8V or 3.3VOutput short-circuit and overload protectionInput overvoltage protection (OVP) and undervoltage lockout (UVLO)Overtemperature warning and protectionSerial peripheral interface (SPI)AEC-Q100 qualified with the following results:Device temperature grade 1: –40°C to +125°C ambient operating temperatureFunctional safety-compliant deviceDeveloped for functional safety applicationsDocumentation available to aid ISO 26262 functional safety system design up to ASIL-C / SIL-2Input supply overvoltage and undervoltage monitoringRegulator output overvoltage and undervoltage monitoringOvervoltage and undervoltage monitoring for one external railQ&A watchdogLevel or PWM error signal monitor (ESM)BIST and CRCInput voltage: 3.3V nominal (3V to 4V range)Three low-noise step-down DC/DC converters:Output voltage: 0.9V to 1.9V, 0.8V (BUCK3), 0.82V (BUCK3)Maximum output current: 3A/ 3A/ 3ASwitching frequency: 4.4MHz, 8.8MHz, and 17.6MHz5V boost converterMaximum output current: 350mA150mA LDOOutput voltage 1.8V or 3.3VOutput short-circuit and overload protectionInput overvoltage protection (OVP) and undervoltage lockout (UVLO)Overtemperature warning and protectionSerial peripheral interface (SPI)

Description

The LP8774x-Q1 device is designed to meet the power management requirements of the AWR and IWR MMICs in various automotive and industrial radar applications. The device has three step-down DC/DC converters, a 5V boost converter and a 1.8V or 3.3V LDO. The LDO is powered from the boost and intended for xWR I/O supply. An SPI serial interface and enable signals control the device. The step-down DC/DC converters support programmable switching frequency of 4.4MHz, 8.8MHz, or 17.6MHz. High switching frequency and low noise across wide frequency range enable LDO-free power solution with minimal or no passive filtering. The high switching frequency improves thermals and transient settling for the MMIC RF rails. The device forces the switching clock into PWM mode for optimal RF performance and can also be synchronized to an external clock. The device supports remote voltage sensing to compensate IR drop between the regulator output and the point-of-load (POL) which improves the accuracy of the output voltage. The LP8774x-Q1 device supports programmable start-up and shutdown delays and sequences which are synchronized to the ENABLE signal. The sequences can also include GPO signals to control external regulators, load switches, and processor reset. The default settings for the device are programmed into nonvolatile memory (NVM). The device controls the output slew rate to minimize output voltage overshoot and in-rush current during device start-up. The LP8774x-Q1 device is designed to meet the power management requirements of the AWR and IWR MMICs in various automotive and industrial radar applications. The device has three step-down DC/DC converters, a 5V boost converter and a 1.8V or 3.3V LDO. The LDO is powered from the boost and intended for xWR I/O supply. An SPI serial interface and enable signals control the device. The step-down DC/DC converters support programmable switching frequency of 4.4MHz, 8.8MHz, or 17.6MHz. High switching frequency and low noise across wide frequency range enable LDO-free power solution with minimal or no passive filtering. The high switching frequency improves thermals and transient settling for the MMIC RF rails. The device forces the switching clock into PWM mode for optimal RF performance and can also be synchronized to an external clock. The device supports remote voltage sensing to compensate IR drop between the regulator output and the point-of-load (POL) which improves the accuracy of the output voltage. The LP8774x-Q1 device supports programmable start-up and shutdown delays and sequences which are synchronized to the ENABLE signal. The sequences can also include GPO signals to control external regulators, load switches, and processor reset. The default settings for the device are programmed into nonvolatile memory (NVM). The device controls the output slew rate to minimize output voltage overshoot and in-rush current during device start-up.