PXR40RM Datasheet, PDF (156/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Power Management Controller (PMC)
VDDREG
Mandatory decoupling capacitor
network
REGSEL
VRCCTL
VDD12
MCU
VSS
No VRCCTL capacitor is allowed
Figure 5-11. VRC 1.2V buck SMPS LDO configuration with external MOS - Schottky diode
5.7.2 Hardware Design Recommendations
Table 5-10. VRC LDO recommended external devices
Part Name
BCP68T1
NJD2874
3BCP68
Part Type
npn
npn
npn
capacitor
capacitor
capacitor
capacitor
resistor
Nominal
Description
6 x 4.7µF–20V
6 x 0.1µF–20V
20µF
2.2uF
12 Ohm
ON Semiconductor™
ON Semiconductor™
NXP Semiconductors™
Ceramic low ESR -One for each VDD pin
Ceramic -One capacitor for each VDD pin
Supply decoupling cap (close to bipolar collector)
Snubber cap, required with NJD2874 (on bipolar
base)
ESR for snubber cap
5-24
PXR40 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor