MFS5600AMBA0ES datasheet(20/118 Pages) NXP

20 / 118 page

NXP Semiconductors

FS5600

Automotive buck regulator and controller with voltage monitors and watchdog timer

OTP_SW1_PFM_TON[1:0]

SW1 PFM on-time (ns)

320

640

800

Table 13. OTP_SW1_PFM_TON[1:0] selection...continued

11.3.4 Soft-start

The startup of SW1 is internally controlled to eliminate overshoot and control the inrush current. The soft-start

time is programmable via OTP using the OTP_SW1_SS[1:0] bits. See Table 8 for values.

11.3.5 Current limit protection

Cycle-by-cycle current limit is utilized to limit the total permissible output current. Output voltage returns to

regulation when the overcurrent is removed. The current limit value is programmable to four different values via

OTP using the OTP_SW1_ILIM_SEL[1:0] bits. See Table 8 for values.

11.3.6 Compensation selection

OTP_SW1_SLOPECOMP[1:0], OTP_SW1_PWM_R_COMP[2:0], and OTP_SW1_GM_COMP[1:0] select

the loop parameters for SW1. See Table 14 for recommended values for different operating conditions. Use

interpolation for values between the ones shown in Table 14.

Switching

frequency

Output voltage

Output

capacitance

OTP_SW1_

SLOPECOMP[1:0]

OTP_SW1_PWM_

R_COMP[2:0]

OTP_SW1_GM_

COMP[1:0]

450 kHz

3.3 V

2 x 22 μF

000

450 kHz

3.3 V

5 x 22 μF

000

2.2 MHz

3.3 V

2 x 22 μF

000

2.2 MHz

3.3 V

5 x 22 μF

010

450 kHz

4.0 V

2 x 22 μF

000

450 kHz

4.0 V

5 x 22 μF

000

2.2 MHz

4.0 V

2 x 22 μF

000

2.2 MHz

4.0 V

5 x 22 μF

010

450 kHz

5.0 V

2 x 22 μF

000

450 kHz

5.0 V

5 x 22 μF

000

2.2 MHz

5.0 V

2 x 22 μF

010

2.2 MHz

5.0 V

5 x 22 μF

010

450 kHz

7.2 V

2 x 22 μF

000

450 kHz

7.2 V

5 x 22 μF

000

2.2 MHz

7.2 V

2 x 22 μF

010

2.2 MHz

7.2 V

5 x 22 μF

100

Table 14. SW1 compensation selection

FS5600

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 4 — 29 April 2024

20 / 118

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