Energy efficiency is becoming one of the most important success factors in electric system designs – especially in systems with currents of up to 10 A. Infineon's new IFX81481ELV is a synchronous DC/DC buck controller which meets the need for minimal power dissipation in applications such as automation, building management, medical systems or electric drives. Operating at input voltages from 4.75 V to 45 V, it is also suited to general purpose combinations of DC/DC and linear voltage regulators in pre-/post-regulation configuration.
Output voltage at the external power transistor is adjustable down to 1.2 V with a tolerance level of +/- 2%. Very low drop out operation is ensured by a maximum duty cycle of more than 99%. The adjustable switching frequency in the range of 100 kHz to 700 kHz may be synchronized with an external clock.
The IFX81481ELV is available in a small SSOP-14 exposed-pad package (RoHS-compliant).
Features
- Synchronous step-down controller
- Driving external FETs for loads up to 10 A
- Adjustable switching frequency can be synchronized with an external clock
- PWM regulation
- Very low shut-down current
- Internal soft start
- Protection function
- Input undervoltage lockout
Applications
- General purpose mid-range supply current applications
- Pre-/post-regulation system supply concepts
- Automation systems
- Electric drives
- Medical systems
- Display devices
