42V regulator has 2.2 µA current and low EMI
Tackling the increasing levels of EMC noise caused by wireless communications systems can have a negative influence on the proper operation of electronics systems.
The R1525 was specially tailored for this purpose and has the capability to reduce EMC noise in the high-frequency band from 10 MHz to 1 GHz, providing a stable output voltage. Compared to predecessor generation products the transient response has been significantly improved, only minor and short peaks will occur at the output voltage as a result of input or load transients.
The CMOS-based regulator is robust enough to survive in harsh conditions; it operates up to 42 V and even tolerates load dump surge peak voltages of 60 V with a duration of less than 200 ms. The minimum operating voltage starts at 3.5 V, which makes the R1525 suitable to use even at severe cranking conditions in automtive designs. The chip will be available in a version targeted for the consumer, industrial and automotive application market and has customized operating temperature ranges, from -40 to 105°C, -50 to 125°C and -40 to 125°C. As for the automotive version, it is scheduled to become AEC-Q100 compliant soon.
Another important feature is to minimise current consumption for automotive applications that are continuously active, extending the operational lifetime of the battery. The R1525 contributes to reduce current consumption with 2.2 µA in On-mode and 0.1 µA in Off-mode.
The R1525 has output voltage accuracy of 0.6% and temperature drift coefficient of only 60 ppm/°C, making the product suitable as a power source with high reliability.
The R1525 has an array of safety features, including over-current protection as well as short protection through an embedded fold back short current limit circuit detects a short circuit and decreases the output current to a safe level of 80 mA, after removing the short the regulator resumes to normal operation automatically. It also has protected pin lay-out, a special lay-out was arranged for the R1525S in HSOP-8E package preventing a failure when adjacent pins are shorted. All four regulator terminals are isolated with not connected adjacent pins.
Thermal protection is incorporated and will turn off the regulator when an over-temperature of 160°C is detected and will resume to normal operation again as soon a temperature of 135°C is reached.
Target applications for this regulator are for example applications with a direct battery connection, ECUs, Infotainment, Security System, Dashboard Systems, Remote Keyless Entry, Immobilizer and Gateways.
The R1525 is available in four different packages, ranging from SOT-23-5, SOT-89-5, HSOP-6J and HSOP-8E.
Related stories:
- 4A POINT OF LOAD DC-DC CONVERTER TARGETS INDUSTRIAL, AUTOMOTIVE AND CONSUMER APPLICATIONS
- LDO REGULATOR DRAWS ONLY 0.3ΜA, MONITORS BATTERY VOLTAGE
- LOW SUPPLY CURRENT LDO INTEGRATES BATTERY VOLTAGE MONITOR
- SEAMLESS LDO BOOSTS BATTERY LIFE WITH LOW CURRENT AT NO LOAD
If you enjoyed this article, you will like the following ones: don't miss them by subscribing to :
