PF1510: Current Limiter and SW3 rated output current

nxf56472 — Thu, 26 Dec 2019 18:57:53 GMT

Hello,

Could questions about the PF1510:

1. At all Sw1, Sw2 and Sw3, the Electrical Characteristics table, the current limiter lower side mosfet detection has a min value of 0.7A. What is this current exactly?
Does it mean that if load current is higher than 0.7A, it might trigger the OCP?
Then the rated output current of all these three converters should be 0.7A instead of 1A. This is critical for us, because we are planning to use SW2/SW3 to support the system, and our power budget is higher than 0.7A but lower than 0.9A.

2. Does Buck SW3 has a rated output current of 1A? On the datasheet, features and benefits summary, it is 1A however, on the Electrical Characteristics, it is not listed. (SW1 and SW2 both listed on the table). Therefore, I'd like to confirm. (Please see the attached screenshot)

Thanks!

Re: PF1510: Current Limiter and SW3 rated output current

guoweisun — Thu, 02 Jan 2020 07:35:22 GMT

Please see below comment:

1: You can understand that high side has peak current limit with highest level up to 2.6A by setting-SWxILIM[1:0] = 11.

For low side current limit level value you can ignore.It does't reflect the load carrying capacity.

2:SW3 is same with SW1/2.

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PF1510: Current Limiter and SW3 rated output current

Re: PF1510: Current Limiter and SW3 rated output current