LM704A0-Q1中文资料汽车级、高密度、4.5V 至 45V 输入、10A、低 EMI 同步直流/直流降压转换器数据手册TI规格书

描述 Description

The LM704A0-Q1 is a low-IQ, wide-VIN synchronous buck converter designed for an input voltage range of 4.5V to 45V and delivering up to 10A of output current at fixed output voltages of 3.3V, 5V, 12V, or an adjustable output.

The LM704A0-Q1 uses a peak current-mode control architecture for easy loop compensation, fast transient response, and excellent load and line regulation. A pair of LM704A0-Q1 converters can be set up in an interleaved mode (paralleled outputs) with accurate current sharing for applications requiring up to 20A of output current.

The LM704A0-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 LM704A0-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 LM704A0-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).

特性 Features

• AEC-Q100 qualified for automotive applications:
• Functional Safety-Capable
• Synchronous DC/DC converter with a versatile buck controller and robust power MOSFETs
• Shutdown mode current: 2.3µA
• 1% accurate, fixed 3.3V, 5V, 12V, or adjustable outputs from 0.8V to 36V
• Designed for low EMI requirements
• Pin-selectable ±8% dual-random spread spectrum reduces peak emissions
• Pin-configurable AUTO or FPWM operation
• Inherent protection features for robust design
• Enable, power good, and thermal shutdown
• 6mm × 6mm thermally optimized, RoHS compliant, QFN-29 package with Pb-free plating
• Create a custom design using the LM704A0-Q1 with the WEBENCH Power Designer