Power Management Unit Automotive, Battery-Connected, Multi-Output
NCV97310
Description The NCV97310 is a 3−output regul...
Power Management Unit Automotive, Battery-Connected, Multi-Output
NCV97310
Description The NCV97310 is a 3−output
regulator consisting of a low−Iq
battery−connected 3 A, 2 MHz non−synchronous switcher and two low−voltage 1.5 A, 2 MHz synchronous switchers; all using integrated power
transistors.
The high−voltage switcher is capable of converting a 4.1 V to 18 V battery input to a 3.3 V output at a constant 2 MHz switching frequency, delivering up to 3 A. In overvoltage conditions up to 36 V, the switching frequency folds back to 1 MHz; in load dump conditions up to 45 V the
regulator shuts down.
The output of the battery−connected buck
regulator serves as the low voltage input for the 2 downstream synchronous switchers. Each downstream output is adjustable from 1.2 V to 2.8 V, with a 1.5 A average current limit and a constant 2 MHz switching frequency. Each switcher has an independent enable and reset pin, giving extra power management flexibility.
For low−Iq operating mode, the low−voltage switchers are disabled and the standby rail is supplied by a low−Iq LDO (up to 150 mA) with a typical Iq of 30 mA. The LDO
regulator is in parallel to the high−voltage switcher, and is activated when the switcher is forced in standby mode.
All 3 SMPS outputs use peak current mode control with internal slope compensation, internally−set soft−start, battery undervoltage lockout, battery overvoltage protection, cycle−by−cycle current limiting, hiccup mode short−circuit protection and thermal...