A5975AD
A5975AD is Up to 2.5A step-down switching regulator manufactured by STMicroelectronics.
Features
- Qualified following the AEC-Q100 requirements (see PPAP for more details)
- 2.5 A DC output current
- Operating input voltage from 4 V to 36 V
- 3.3 V / (±2%) reference voltage
- Output voltage adjustable from 1.235 V to 35 V
- Low dropout operation: 100% duty cycle
- 500 k Hz internally fixed frequency
- Voltage feed-forward
- Zero load current operation
- Internal current limiting
- Inhibit for zero current consumption
- Synchronization
Application
- Dedicated to automotive applications
Description
The A5975AD is a step-down monolithic power switching regulator with a minimum switch current limit of 3.1 A, it is therefore able to deliver up to 2.5 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to a HSOP8 package with exposed frame, that allows to reduce the RTHJ-A down to approximately 40 °C/W. The device uses an internal P-channel DMOS transistor (with a typical RDS(on) of 250 m) as switching element to minimize the size of the external ponents. An internal oscillator fixes the switching frequency at 500 k Hz. Having a minimum input voltage of only 4 V, it fits automotive applications requiring device operation even in cold crank conditions. Pulse-by-pulse current limit with the internal frequency modulation offers an effective constant current short-circuit protection.
Figure 1. Application schematic
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