TDA38840AUMA1

The TDA38840 is an easy-to-use, fully integrated dc - dc Buck regulator. The onboard PWM controller and OptiMOS™ FETs with integrated bootstrap diode make it a small footprint solution, providing high - efficiency power delivery. Furthermore, it uses a fast Constant On - Time (COT) control scheme, which simplifies design efforts and achieves fast control response. The TDA38840 has an internal low dropout voltage regulator, allowing operation with a single supply. It can also operate with an external bias supply, with an extended operating input voltage (PVin) range from 2.0 V to 17 V. The TDA38840 is a versatile regulator, offering programmable switching frequency from 600 kHz to 2 MHz, four selectable current limits, four selectable soft - start times, Forced Continuous Conduction Mode (FCCM) and Diode Emulation Mode (DEM) operation. It also features important protection functions, such as pre - bias start - up, thermally compensated current limit, over voltage and under voltage protection, and thermal shutdown to give required system level security in the event of fault conditions.

Applications

• Server Applications
• Storage Applications
• Telecom & Datacom Applications
• Distributed Point of Load Power Architectures

Key features

• Single 4.3 V to 17 V application or Wide Input Voltage Range from 2.0 V to 17 V with an External VCC
• Precision Reference Voltage (0.6 V +/- 0.5%)
• Enhanced Fast COT Engine Stable with Ceramic Output Capacitors
• Optional Forced Continuous Conduction Mode and Diode Emulation for Enhanced Light Load Efficiency
• Programmable Switching Frequency from 600 kHz to 2 MHz
• Monotonic Start - Up with Four Selectable Soft - Start Times & Enhanced Pre - Bias Start - Up
• Thermally Compensated Internal Over Current Protection with Four Selectable Settings
• Enable input with Voltage Monitoring Capability & Power Good Output
• Thermal Shut Down
• Operating Temp: - 40 °C < Tj < 125 °C
• Small Size: 5 mm x 6 mm PQFN
• Halogen - free and RoHS2 Compliant with Exemption 7a