PIP212-12M Datasheet, PDF (6/21 Pages) NXP Semiconductors – DC-to-DC converter powertrain

NXP Semiconductors
PIP212-12M
DC-to-DC converter powertrain
8.7 Over Temperature Protection (OTP)
Protection against over temperature is provided by an internal thermal shutdown
incorporated into the control circuit. When the control circuit die temperature exceeds the
upper thermal trip level, both MOSFETs are switched off and the internal V_DDG regulator
disabled. This state continues until the die temperature falls below the lower trip
temperature. This function is only operational when V_DDC is above the UVLO level.
8.8 Disable
This is the disable or enable function of the driver. Pulling the DISABLE pin LOW switches
off both MOSFETs and disables the REG5V output. This pin is internally pulled LOW
whilst V_DDC remains below the UVLO threshold. Once V_DDC exceeds the UVLO threshold,
this pin is pulled HIGH by an internal resistor. In this way the driver will enable itself unless
there is an external pull down. In multiphase applications, connecting the DISABLE pins of
multiple PIP212-12M devices together will ensure that all devices will only become
enabled when the voltage on the V_DDC pins of all of the devices has exceeded the UVLO
threshold; see Figure 10.
8.9 Reg5V
This function provides a low current regulated 5 V output voltage suitable for providing
power to a PWM controller. It is operational when both PRDY and DISABLE are HIGH.
Operation as a 5 V power supply is only guaranteed when V_DDC is > 7 V. This pin can also
be used as part of an enable function for a PWM controller; this ensures that the PWM is
enabled only when the PIP212-12M is fully operational (i.e. both PRDY and DISABLE are
HIGH).
PIP212-12M_4
Product data sheet
Rev. 04 — 23 October 2006
© NXP B.V. 2006. All rights reserved.
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