SPC5644AF0MLU2 datasheet(75/138 Pages) FREESCALE

75 / 138 page

MPC5644A Microcontroller Data Sheet, Rev. 7

Freescale Semiconductor

3.6.1

Voltage regulator controller (VRC) electrical specifications

—

CC C Variation of LVI for rising

5V VDDREG supply at

power-on reset

Lvi5p0 -

Lvi5p0

Lvi5p0 +

—

CC C Variation of LVI for rising

5V VDDREG supply

power-on reset

Lvi5p0 -

Lvi5p0

Lvi5p0 +

—

CC C Trimming step LVI 5 V

—

Lvi5p0_h

CC C LVI 5 V hysteresis

—

Por5V_r

CC C Nominal POR for rising 5 V

VDDREG supply

—2.67

—

CC C Variation of POR for rising

5V VDDREG supply

Por5V_r

- 35%

Por5V_r

+ 50%

Por5V_f

CC C Nominal POR for falling 5 V

VDDREG supply

—2.47

—

CC C Variation of POR for falling

5V VDDREG supply

Por5V_f

- 35%

Por5V_f

+ 50%

1 Using external ballast transistor.

2 Min range is extended to 10% since Lvi1p2 is reprogrammed from 1.2 V to 1.16 V after power-on reset.

3 LVI for falling supply is calculated as LVI rising – LVI hysteresis.

4 Lvi1p2 tracks DC target variation of internal Vdd regulator. Minimum and maximum Lvi1p2 correspond to minimum

and maximum Vdd DC target respectively.

5 Minimum loading (<10 mA) for reading trim values from flash, powering internal RC oscillator, and IO consumption

during POR.

6 No external load is allowed, except for use as a reference for an external tool.

7 This value is valid only when the internal regulator is bypassed. When the internal regulator is enabled, the

maximum external load allowed on the Nexus pads is 30 pF at 40 MHz.

8 Lvi3p3 tracks DC target variation of internal Vdd33 regulator. Minimum and maximum Lvi3p3 correspond to

minimum and maximum Vdd33 DC target respectively.

Table 16. VRC electrical specifications

Symbol

Parameter

Min.

Max.

Units

IVRCCTL1

1 IVRCCTL is measured at the following conditions: VDD = 1.35 V, VRC33 = 3.1 V, VVRCCTL = 2.2 V.

Current can be sourced by VRCCTL at Tj:

25 oCTBD

—

150 oCTBD

—

BETA 2

Required gain at Tj:

IDD  IVRCCTL (fsys = fMAX) 1,3,4

– 40 oCTBD

—

25 oC

TBD

——

150 oC

TBD

—

Table 15. PMC Electrical Characteristics (continued)

Name

Parameter

Min

Typ

Max

Unit

Notes

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