Texas Instruments LP877451A1RXVRQ1
- Part Number:
- LP877451A1RXVRQ1
- Manufacturer:
- Texas Instruments
- Ventron No:
- 6404455-LP877451A1RXVRQ1
- Description:
- Automotive three 3-A low-noise buck converter, IO LDO & 5-V boost converter PMIC for radar MMICs
- Datasheet:
- lp87745-q1
- Regulated outputs (#)5
- TI functional safety categoryFunctional Safety-Compliant
- Vin (min) (V)3
- Vin (max) (V)4
- Iout (max) (A)3
- RatingAutomotive
- Step-down DC/DC controller0
- Step-down DC/DC converter3
- Step-up DC/DC controller0
- Step-up DC/DC converter1
- LDO1
- Iq (typ) (mA)0.02
- Switching frequency (max) (kHz)19200
- FeaturesOutput Short-Circuit and Overload Protection
- Operating temperature range (°C)-40 to 125
- Processor namemmWave AWR
- Processor supplierTexas Instruments
- Shutdown current (ISD) (typ) (μA)20
- Switching frequency (typ) (kHz)17600
- ConfigurabilityFactory programmable
The LP87745-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 5-V boost converter and a 1.8 V or 3.3 V 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 4.4 MHz, 8.8 MHz, or 17.6 MHz. High switching frequency and low noise across wide frequency range enable LDO-free power solution with minimal or no passive filtering. This 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 LP87745-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.
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ImagePart NumberManufacturerRegulated outputs (#)TI functional safety categoryVin (min) (V)Vin (max) (V)Iout (max) (A)RatingStep-down DC/DC controllerStep-down DC/DC converterStep-up DC/DC controllerStep-up DC/DC converterLDOIq (typ) (mA)Switching frequency (max) (kHz)FeaturesOperating temperature range (°C)Processor nameProcessor supplierShutdown current (ISD) (typ) (μA)Switching frequency (typ) (kHz)ConfigurabilityView Compare
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LP877451A1RXVRQ15Functional Safety-Compliant343Automotive030110.0219200Output Short-Circuit and Overload Protection-40 to 125mmWave AWRTexas Instruments2017600Factory programmable-
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4-2.85.54Automotive040000.00672200Diagnostics-40 to 125GenericGeneric1.42000Factory programmable
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1-2.85.516Automotive010000.00672200Dynamic voltage scaling-40 to 125GenericGeneric1.42000Factory programmable
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1-2.85.516Automotive010000.00672200Dynamic voltage scaling-40 to 125GenericGeneric1.42000Factory programmable
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