ST’s monolithic switching regulators offer input-voltage capability up to 55 V, deliver output currents up to 4 A, with high switching frequency.
This broad portfolio of ICs is composed of highly-specialized products to meet every market requirement: HV technology together with high reliability and robustness for industrial and automotive applications, compactness, high efficiency at any load and a high level of performance for consumer and computer products.
These devices embed a full set of protection functions (overcurrent, overvoltage, over-temperature) to increase the MTBF and reduce the number of external components.
There are multiple package options, all offering compactness and high thermal performances to fit different applications.
Automotive grade buck switching regulators
To meet the specific requirements of the automotive market, ST has developed a new monolithic step-down asynchronous DC-DC converter family, qualified according to the AEC-Q100 specification guidelines.
The operating input voltage ranges from 4 to 36 V and the output voltage can be adjusted from 1.23 to 35 V. The output voltage has a ±3 % precision including line, load and temperature variations.
Extreme conversion ratios are supported thanks to the short minimum conduction time of the embedded power element (around 250 ns), allowing a low output voltage to be regulated even during an overshoot of the bus. The integrated P-channel MOSFET requires no external bootstrap capacitor and enables a 100 % duty cycle. The low RDS(on) (typical value of 250 mΩ) and the fast conduction times of the power element, combined with the high switching frequency (250/500 kHz), assure a very high efficiency under most application conditions.