IFX91041EJV Infineon

IFX91041 1.8A DC/DC Step-Down Voltage Regulator 5.0V, 3.3V or Adjustable Output Voltage IFX91041EJV50 IFX91041EJV33 IFX91041EJV Data Sheet Rev. 1.1, 2011-07-08 Standard Power 1.8A DC/DC Step-Down Voltage Regulator IFX91041 1Overview 1.8A step down voltage regulator Output voltage versions: 5.0 V, 3.3 V and adjustable 2% output voltage tolerance (+-4% for full load current range) Integrated power transistor PWM regulation with feedforward Input voltage range from 4.75V to 45V 370 kHz switching frequency Synchronization input Very low shutdown current consumption (<2uA) Soft-start function PG-DSO-8-27 Input undervoltage lockout Suited for industrial applications: T = -40 C to +125C j Green Product (RoHS compliant) For automotive and transportation applications, please refer to the Infineon TLE and TLF voltage regulator series. Description The IFX91041 series are monolithic integrated circuits that provide all active functions for a step-down (buck) switching voltage regulator, capable of driving up to 1.8A load current with excellent line and load regulation. These devices are suited for use in industrial applications featuring protection functions such as current limitation and overtemperature shutdown. Versions with a fixed 5.0V and 3.3V (IFX91041EJV50, IFX91041EJV33) output voltage as well as an adjustable device (IFX91041EJV) with 0.60V reference feedback voltage are available. The switching frequency of 370kHz allows to use small and inexpensive passive components. The IFX91041 features an enable function reducing the shut-down current consumption to <2uA. The voltage mode regulation scheme of this device provides a stable regulation loop maintained by small external compensation components. Besides the feedforward control path offers an excellent line transient rejection. The integrated soft-start feature limits the current peak as well as voltage overshot at start-up. Type Package Marking IFX91041EJV50 PG-DSO-8-27 I9104150 IFX91041EJV33 PG-DSO-8-27 I9104133 IFX91041EJV PG-DSO-8-27 I91041V Data Sheet 2 Rev. 1.1, 2011-07-08