MMPF0100Z datasheet(37/128 Pages) NXP

37 / 128 page

NXP Semiconductors

PF0100Z

FUNCTIONAL BLOCK REQUIREMENTS AND BEHAVIORS

6.4.4.3

SW1A/B/C

SW1/A/B/C are 2.5 A to 4.5 A buck regulators which can be configured in various phasing schemes, depending on the desired cost/

performance trade-offs. The following configurations are available:

• SW1A/B/C single phase with one inductor

• SW1A/B as a single phase with one inductor and SW1C in independent mode with one inductor

• SW1A/B as a dual phase with two inductors and SW1C in independent mode with one inductor

The desired configuration is programmed by OTP by using SW1_CONFIG[1:0] bits in the register map Table 136. Extended page 1, page

106, as shown in Table 39.

6.4.4.3.1

SW1A/B/C single phase

In this configuration, all phases A, B, and C, are connected together to a single inductor, thus, providing up to 4.50 A current capability for

high current applications. The feedback and all other controls are accomplished by use of pin SW1CFB and SW1C control registers,

respectively. Figure 11 shows the connection for SW1A/B/C in single phase mode.

During single phase mode operation, all three phases use the same configuration for frequency, phase, and DVS speed set in the

SW1CCONF register. However, the same configuration settings for frequency, phase, and DVS speed setting on SW1AB registers should

be used. The SW1FB pin should be left floating in this configuration.

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

SW4

SW4_PWRSTG[2:0]

ISW4MAX

50%

0.5

75%

0.75

75%

0.75

100%

1.0

Table 39. SW1 configuration

SW1_CONFIG[1:0]

Description

A/B/C single phase

A/B single phase

C independent mode

A/B dual phase

C independent mode

Reserved

Table 38. Programmable current configuration (continued)

Regulators

Control bits

% of power stages

enabled

Rated current (A)

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