MMPF0200Z datasheet(39/118 Pages) NXP

39 / 118 page

Analog Integrated Circuit Device Data



Freescale Semiconductor

PF0200Z

Functional Block Requirements and Behaviors

Power Generation

Programmable Maximum Current

The maximum current, ISWxMAX, of each buck regulator is programmable. This allows the use of smaller inductors where lower

currents are required. Programmability is accomplished by choosing the number of paralleled power stages in each regulator.

The SWx_PWRSTG[2:0] bits on the Extended Page 2 of the register map control the number of power stages. See Table 37 for

the programmable options. Bit[0] must always be enabled to ensure the stage with the current sensor is chosen. The default

setting, SWx_PWRSTG[2:0] = 111, represents the highest maximum current. The current limit for each option is also scaled by

the percentage of power stages that are enabled.

Table 36. Regulator Frequency Configuration

SWxFREQ[1:0]

Frequency

1.0 MHz

2.0 MHz

4.0 MHz

Reserved

Table 37. Programmable Current Configuration

Regulators

Control Bits

% of Power Stages

Enabled

Rated Current (A)

SW1AB

SW1AB_PWRSTG[2:0]

ISW1ABMAX

40%

1.0

80%

2.0

60%

1.5

100%

2.5

SW2

SW2_PWRSTG[2:0]

ISW2MAX

38%

0.55

75%

1.125

63%

0.95

100%

1.5

SW3A

SW3A_PWRSTG[2:0]

ISW3AMAX

40%

0.5

80%

1.0

60%

0.75

100%

1.25

SW3B

SW3B_PWRSTG[2:0]

ISW3BMAX

40%

0.5

80%

1.0

60%

0.75

100%

1.25

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