TLF50281ELV50 2.2 MHz Step-Down Regulator 500 mA, 5 V, low quiescent current 1 Overview Features 500 mA step down voltage regulator 5 V Output voltage 2% output voltage tolerance Low quiescent current (less than 45 A at nominal battery voltage) Integrated power transistor Current mode PWM regulation PFM mode for light load current Input voltage range from 4.75 V to 45 V 2.2 MHz switching frequency 100% Duty cycle Synchronization input Very low shutdown current consumption (< 2 A) Soft-start function Reset generator Watchdog Input undervoltage lockout Suited for automotive applications: T = -40C to 150C j Green Product (RoHS compliant) Potential applications Applications with a 5.0 V switching regulator as replacement for linear voltage regulator with low quiescent current, such as: dashboard engine management braking body infotainment Data Sheet 1 Rev. 1.1 www.infineon.com 2018-03-07 TLF50281ELV50 2.2 MHz Step-Down Regulator 500 mA, 5 V, low quiescent current Overview Product validation Qualified for automotive applications. Product Validation according to AEC-Q100/101. Description The TLF50281EL is a high frequency PWM step-down DC/DC converter with an integrated PMOS power switch, packaged in a small PG-SSOP-14 with exposed pad. The wide input voltage range from 4.75 V to 45 V makes the TLF50281EL suitable for a wide variety of applications. The 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 in minimized consumption of board space. In light load condition the device operates in Pulse Frequency Modulation (PFM) to optimize the efficiency. Between the single pulses, all internal controlling circuitry is switched off to reduce the internal power consumption. The TLF50281EL includes protection features such as a cycle-by-cycle current limitation, overtemperature shutdown and input undervoltage lockout. The enable function, in shutdown mode with less than 2 A current consumption, enables easy power management in battery-powered systems. The voltage regulation loop provides an excellent line and load regulation, the stability of the loop is ensured by an internal compensation network. This compensation network combined with a current mode regulation control guarantees a highly effective line transient rejection. During start-up the integrated soft-start limits the inrush current peak and prevents output voltage overshoot. Type Package Marking TLF50281EL PG-SSOP-14 TLF50281 Data Sheet 2 Rev. 1.1 2018-03-07