TPIC2030 datasheet(21/61 Pages) TI1

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5.0 V

3.9 V

2.8 V

2.2 V

0 V

P5V>3.9 V && CV3P3>2.8 V

20 ms

CV3P3

P5V Supply

XRESET

time

5.0 V

3.9 V

2.8 V

2.2 V

0 V

P5V>3.9V && CV3P3>2.8V

1.6 ms 0.8 ms

20 ms

90% (REGOUT)

REGOUT

CV3P3

P5V Supply

Less than 10 ms

XRESET

time

TPIC2030

www.ti.com

SLIS171 – DECEMBER 2015

8.4 Device Functional Modes

8.4.1 Power-On Reset (POR)

8.4.1.1 Power-Up Sequences

In TPIC2030, the normal sequence is to wait for 5-V supply to come up to 2.2 V. After 5 V establish, the internal

3.3 V will start and wait until stabilize. Now the voltage monitors start to work and begin to look for the DC-DC

converter output. DC-DC converters stabilize the power up sequence finishes and the part starts to function.

Once the part finishes all of its power up tasks, it takes XRESET high to indicate that the part is no longer in

reset and ready to communicate to the outside world. All the DC-DC converter have soft-start features to avoid

rush current and voltage over shoot. Each soft-start sequence takes about 0.8 ms.

Figure 13. POR (Enable DCDC)

Figure 14. POR (Disable DCDC)

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