TLF50281ELXUMA3

TLF50281ELXUMA3 is a high-frequency PWM step-down DC/DC converter with an integrated PMOS power switch. The wide input voltage range from 4.75V to 45V makes the TLF50281EL suitable for a wide variety of applications. This device is designed to be used under harsh automotive environmental conditions. The switching frequency of nominal 2.2MHz allows the use of small and cost-effective inductors and capacitors, resulting in a low, predictable output voltage ripple and minimized consumption of board space. In light load conditions, the device operates in pulse frequency modulation (PFM) to optimize efficiency. Between the single pulses, all internal controlling circuitry is switched off to reduce internal power consumption. It is used in applications with a 5V switching regulator as a replacement for linear voltage regulators with low quiescent current, such as dashboard, engine management, braking, body, and infotainment.

• Integrated power transistor, current mode PWM regulation
• PFM mode for light load current, input voltage range from 4.75V to 45V
• 2.2MHz switching frequency, 100% duty cycle, watchdog
• Synchronization input, soft-start function, reset generator
• Input undervoltage lockout, output voltage is 5V typical at (VEN = 5V, 7V <lt/> VS <lt/> 12V)
• Power stage on-resistance is 1.5 ohm typical at (tested at 100mA, VS = 7V)
• Current transition rise/fall time is 100mA/ns typical at (VS = 6V to 40V)
• Buck peak over current limit is 1.7A maximum at (VS = 6V to 40V)
• Soft start ramp is 450µs typical at (VFB rising from 5% to 95% of VFB,nom)
• Junction temperature range from -40°C to 150°C, SSOP-14 package