IFX91041_11 Datasheet, PDF (2/17 Pages) Infineon Technologies AG – 1.8A DC/DC Step-Down Voltage Regulator

1.8A DC/DC Step-Down Voltage Regulator
IFX91041
1
Overview
• 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
• Input undervoltage lockout
• Suited for industrial applications: T_j = -40 °C to +125°C
• Green Product (RoHS compliant)
PG-DSO-8-27
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
IFX91041EJV50
IFX91041EJV33
IFX91041EJV
Data Sheet
Package
PG-DSO-8-27
PG-DSO-8-27
PG-DSO-8-27
2
Marking
I9104150
I9104133
I91041V
Rev. 1.1, 2011-07-08