Texas Instruments LM70880-Q1

Beschreibung

The LM708x0-Q1 is a family of low-IQ, wide-VIN synchronous buck converters designed for an input voltage range of 4.5V to 80V and delivering up to 8A of output current at fixed output voltages of 3.3V, 5V, 12V, or an adjustable output.The LM708x0-Q1 uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. A pair of LM708x0-Q1 converters can be set up in an interleaved mode (paralleled outputs) with accurate current sharing for applications requiring up to 16A of output current.The LM708x0-Q1 features a unique Dual Random Spread Spectrum (DRSS) function that combines low-frequency triangular and high-frequency cycle-by-cycle random modulations for improved EMI performance across a wide range of frequency bands.Additional features of the LM708x0-Q1 include user-selectable diode emulation for lower current consumption at light-load conditions, open-drain Power-Good flag for fault reporting and output monitoring, precision enable input, monotonic start-up into prebiased load, integrated VCC bias supply regulator, internal 2.8ms soft-start time, and thermal shutdown protection with automatic recovery.The LM708x0-Q1 converter comes in a 6mm × 6mm thermally-optimized, 29-pin QFN package. The three die-attach pads (VIN, SW, and PGND) improve thermal performance and board level reliability (BLR).

Eigenschaften

AEC-Q100 qualified for automotive applications:Device temperature grade 1: –40°C to +125°C ambient operating temperatureFunctional Safety-CapableDocumentation available to aid functional safety system designSynchronous DC/DC converter with a versatile buck controller and robust power MOSFETsWide input voltage range: 4.5V to 80VShutdown mode current: 2.3µANo-load IQ regulating 48V to 5V: 8.2µA1% accurate, fixed 3.3V, 5V, 12V, or adjustable outputs from 0.8V to 55VDual-phase operation enabling output currents up to 16ADesigned for low EMI requirementsFacilitates CISPR 25 Class 5 compliancePin-selectable ±8% dual-random spread spectrum reduces peak emissionsSwitching frequency: 200kHz to 2.2MHzPin-configurable AUTO or FPWM operationInherent protection features for robust designInternal hiccup-mode overcurrent protectionEnable, power good, and thermal shutdownInternal or external loop compensation6mm × 6mm thermally optimized, RoHS compliant, QFN-29 package with Pb-free platingCreate a custom design using the LM708x0-Q1 with the WEBENCH Power Designer

Typische Anwendungen

• Advanced driver assist systems (ADAS)
• Automotive electronic systems
• Infotainment and cluster

Weiterführende Informationen

• Datenblatt
• Produktseite des IC-Herstellers