Texas Instruments LM3489MM | Demoboard USB-C-PD-DUO-EVM

Beschreibung

The LM3489 device is a high-efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, cost-effective, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultra-low dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple. A dedicated enable pin provides a shutdown mode drawing only 7 µA. Leaving the enable pin unconnected defaults to on.Current limit protection can be implemented by measuring the voltage across the PFET’s RDS(ON), thus eliminating the need for a sense resistor. A sense resistor may be used to improve current limit accuracy if desired. The cycle-by-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.

Eigenschaften

• Qualified for Automotive Parts
• AEC-Q100 Qualified With the Following Results:
• Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
• Device HBM ESD Classification Level 2
• Device CDM ESD Classification Level C5
• Easy-to-Use Control Methodology
• No Control Loop Compensation Required
• Wide 4.5-V to 35-V Input Range
• 1.239 V to VIN Adjustable Output Range
• High Efficiency: 93%
• ±1.3% (±2% Over Temperature) Internal Reference
• 100% Duty Cycle Operation
• Maximum Operation Frequency > 1 MHz
• Current Limit Protection
• Dedicated Enable Pin (on if Unconnected)
• Shutdown Mode Draws Only 7-µA Supply Current
• 8-Pin VSSOP Package

Typische Anwendungen

• Automotive
• Battery-Powered Portable Applications, Distributed Power Systems, Always-On Power
• Set-Top Boxes, DSL or Cable Modems, PC/IA, Auto PCs, TFT Monitors
• High-Power LED Drivers

Weiterführende Informationen

• Datenblatt
• Produktseite des IC-Herstellers