TLF50251EL

TLF50251EL 2.2 MHz Step-Down Regulator 500 mA, 5 V, low quiescent current Data Sheet Rev. 1.0, 2013-06-19 Automotive Power 2.2 MHz Step-Down Regulator 500 mA, 5 V Low quiescent current TLF50251EL TLF50251EL 1 Overview 500 mA step down voltage regulator 5 V Output voltage ± 2% output voltage tolerance Low quiescent current (less than 45µA at nominal battery voltage) Integrated power transistor Current mode PWM regulation PFM mode for light load current Input voltage range from 4.75V to 45V 2.2 MHz switching frequency 100% Duty cycle Synchronization input Very low shutdown current consumption (<2 µA) Soft-start function Reset generator Input undervoltage lockout Suited for automotive applications: Tj = -40 °C to +150 °C Green Product (RoHS compliant) AEC Qualified PG-SSOP-14 Description The TLF50251EL 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 to 45 V makes the TLF50251EL suitable for a wide variety of applications. The device is designed to be used under harsh automotive environmental conditions. The switching frequency of nominal 2.2 MHz 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 efficien...