MPC5644B View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
MFG CO.
'MPC5644B' PDF : 114 Pages View PDF
EMI/decoupling cap (CREGP) at each VDD_LV/VSS_LV pin pair.
4.8.1.1 Recommendations
• The external NPN driver must be BCP68 type.
• VDD_LV should be implemented as a power plane from the emitter of the ballast transistor.
• 10 F capacitors should be connected to the 4 pins closest to the outside of the package and should be evenly
distributed around the package. For BGA packages, the balls should be used are D8, H14, R9, J3–one cap on each side
of package.
— There should be a track direct from the capacitor to this pin (pin also connects to VDD_LV plane). The tracks ESR
should be less than 100 m.
— The remaining VDD_LV pins (exact number will vary with package) should be decoupled with 0.1 F caps,
connected to the pin as per 10 F.
(see Section 4.4, “Recommended operating conditions”).
4.8.2 VDD_BV options
• Option 1: VDD_BV shared with VDD_HV_A
VDD_BV must be star routed from VDD_HV_A from the common source. This is to eliminate ballast noise injection on
the MCU.
• Option 2: VDD_BV independent of the MCU supply
VDD_BV > 2.6 V for correct functionality. The device is not monitoring this supply hence the external component must
meet the 2.6 V criteria through external monitoring if required.
Table 22. Voltage regulator electrical characteristics
Symbol
C
Parameter
Conditions1
Value2
Unit
Min Typ Max
CREGn SR — External ballast stability capacitance
—
RREG SR — Stability capacitor equivalent serial
—
resistance
40
—
60 F
—
—
0.2
CREGP
SR — Decoupling capacitance (Close to VDD_HV_A/HV_B/VSS_HV
the pin)
pair
100
— nF
CDEC2
VDD_LV/VSS_LV pair
SR — Stability capacitance regulator
VDD_HV_A/VSS_HV
supply (Close to the ballast collector)
100
— nF
10
—
40 F
VMREG
IMREG
IMREGINT
VLPREG
ILPREG
CC P Main regulator output voltage
Before trimming
After trimming
SR — Main regulator current provided to
—
VDD_LV domain
CC D Main regulator module current
consumption
IMREG = 200 mA
IMREG = 0 mA
CC P Low power regulator output voltage After trimming
SR — Low power regulator current
provided to VDD_LV domain
—
— 1.32 — V
— 1.28 —
—
—
350 mA
—
—
2 mA
—
—
1
— 1.23 — V
—
—
50 mA
MPC5646C Microcontroller Data Sheet, Rev. 3
56
Preliminary—Subject to Change Without Notice
Freescale Semiconductor
Share Link: 
