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Texas Instruments LP8764-Q1 20A Buck Converter

Texas Instruments LP8764-Q1 20A Buck Converter is designed to meet the current processors’ and platforms’ power management requirements in various industrial and safety-relevant automotive applications. The device has four step-down DC/DC converter cores configurable for five different phase configurations from one 4-phase output to four 1-phase outputs. The device settings can be changed using an I²C-compatible serial interface or an SPI serial interface.

The automatic PFM/PWM (AUTO mode) operation and the automatic phase adding and phase shedding maximize efficiency over a wide output-current range. The Texas Instruments LP8764-Q1 device supports remote differential voltage sensing for multiphase outputs to compensate for the IR drop between the regulator output and the point-of-load (POL). This feature improves the output voltage’s accuracy. The switching clock can be forced to PWM mode and the phases are interleaved. The spread-spectrum mode can be enabled and the switching can be synchronized to minimize the disturbances.

Features

AEC-Q100 Qualified with the following results
- 2.8V to 5.5V input voltage
- Device temperature grade 1 (–40°C to +125°C ambient operating temperature range)
- Device HBM ESD Classification Level 2
- Device CDM ESD Classification Level C4B
Functional Safety-Compliant
- Developed for functional safety applications
- Documentation is available to aid with ISO 26262 system design up to ASIL-D
- Documentation is available to aid with IEC 61508 system design up to SIL-3
- Systematic capability up to ASIL-D
- Hardware integrity up to ASIL-D
- Windowed voltage and over-current monitors
- Watchdog with selectable trigger / Q&A mode
- Level or PWM error signal monitoring (ESM)
- Thermal monitoring with a high-temperature warning and thermal shutdown
- Bit-integrity (CRC) error detection on configuration registers and non-volatile memory

Four high-efficiency step-down DC/DC converters
- 0.3V to 3.34V (0.3V to 1.9V for multi-phase outputs) output voltage
- Maximum output current: 5A per phase, up to 20A with 4-phase configuration
- 0.5mV/µs to 33mV/µs programmable output voltage slew-rate
- 2.2MHz or 4.4MHz switching frequency
Ten configurable general-purpose I/O (GPIO)
SPMI interface for multi-PMIC synchronization
Input overvoltage monitor (OVP) and undervoltage lockout (UVLO)

Applications

Advanced driver assistance systems (ADAS)
Front camera
Surround-view system ECU

Long range radar
Sensor fusion
Domain controller

Texas Instruments LP8764-Q1 20A Buck Converter

Features

Applications

Functional Block Diagram

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