ZHCSJU9E January 2007 – June 2019 TPS40077
PRODUCTION DATA.
The internal regulators are linear regulators that provide controlled voltages from which the drivers and the internal circuitry operate. The DBP pin is connected to a nominal 8-V regulator that provides power for the driver circuits. This regulator has two modes of operation. At VDD voltages below 8.5 V, the regulator is in a low-dropout mode of operation and tries to provide as little impedance as possible from VDD to DBP. Above 10 V at VDD, the regulator regulates DBP to 8 V. Between these two voltages, the regulator remains in the state it was in when VDD entered this region (see Figure 20). Small amounts of current can be drawn from this pin for other circuit functions, as long as power dissipation in the controller device remains at acceptable levels and junction temperature does not exceed 125°C.
The LVBP pin is connected to another internal regulator that provides 4.2 V (nom) for the operation of low-voltage circuitry in the controller. This pin can be used for other circuit purposes, but extreme care must be taken to ensure that no extra noise is coupled onto this pin; otherwise, controller performance suffers. Current draw is not to exceed 1 mA. See Figure 21 for typical output voltage at this pin.