LP87524B-Q1: LP87524-Q1 transient response

Tomohiro Nagasawa58

Expert 1570 points

Part Number: LP87524B-Q1
Other Parts Discussed in Thread: LP8752-Q1

Dear Support team

Is it possible to meet the specifications of transient response below with LP8752-Q1?

■Spec

・Vin：3.3V Vout:1.5V

・Iout 0⇔4A (slew rate 4A /10～20us)

Regards

Tomohiro Nagasawa

over 6 years ago

0 Karl Wallinger over 6 years ago

TI__Genius 16150 points

Hi Nagasawa-san,

I've assigned this to the device expert, he will answer your question.

Regards,
Karl

0 Tomi Koskela over 6 years ago

TI__Genius 11020 points

Hello Nagasawa-san,

The transient is not too fast for LP8752x device. Do you have voltage overshoot/undershoot requirement in the system?

Thanks.

Regards,

Tomi Koskela

0 Tomohiro Nagasawa58 over 6 years ago in reply to Tomi Koskela

Expert 1570 points

Hello Tomi-san

I'm sorry for delay response and lack of information.

Target voltage of over/under shoot is ±50mV.

Does LP8752x meet this spec?

Regards

Tomohiro Nagasawa

0 Tomi Koskela over 6 years ago in reply to Tomohiro Nagasawa58

TI__Genius 11020 points

Hi Nagasawa-san,

With two phase operation it is doable. With single phase it might be difficult to meet that spec. So with two bucks connected together in LP8752x it stays inside the +/-50mV window with the transient you described.

Thanks.

Best regards,

Tomi Koskela

Power management

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LP87524B-Q1: LP87524-Q1 transient response