LP38852 / Slew rate condition at load transient response

Hi All,

Please contact me directly if you need. Your response will be appreciated.

Best Regards,

Sonoki

Hello Sonoki,

The condition for this datasheet load transient data is below.

• R1=1.4kΩ, R2=1.0kΩ
• V_OUT = 1.2V (V_OUT=  V_ADJ x (1+(R1/R2)), where V_ADJ= 500mV)
• V_IN= V_OUT(NOM) + 1V =  2.2V
• V_BIAS = 3.0V
• C_IN = C_OUT = 10 uF, C_BIAS = 1uF and C_SS = Open
• T_J = 25 °C
• I_OUT = 10mA to 1.5A

Hope this answers your question.

Kind regards,

Zarni Tun

Hi Zami,

I'd like to know the slew rate of load transient. Please refer inserted that is example from TPS774xx. I believe that such information is not included in LP38852 datasheet.

Best Regards,

Sonoki

Hello Sonoki-San,

We don't have a slew rate information on the datasheet, and we are following up on the detail. What is the load transient requirement for the application in which LP38852 is used?

Thanks,

Zarni

Hi Zami-san,

Thank you for your continuous support. Please give your update when you will be able to have any information.

Here is our customer's situation.

• Load is supply for transceiver in FPGA
• Vout = 1.1V from 1.8V input
• Maximum load current is 1.2A
• They do not care about overshoot/undershoot because there is no large transient in their actual system
• They concern about the duration of ringing in preference to overshoot/undershoot
• Their goal is to achieve the shorter duration of ringing than the waveform in datasheet at their actual system

Best Regards,

Sonoki

Hi Zami-san,

Can you find any information? Your response will be appreciated.

Best Regards,

Sonoki