TPS54160: Output voltage drop down

Kevin Huang8

Part Number: TPS54160

Hi Team,

1. When the RT resistance is 390K, it is found that the 3.3V output is abnormal. After powering on, 3.3V will be pulled down to 1V.

2. If the RT resistor 390K change to 90.9K, this output voltage will be 3.3V.

11 months ago

0 Aurora Tie 11 months ago

TI__Genius 11230 points

Hi,

The value of RT resistor will affect parameters such as inductance value. Please use webench to check whether your peripheral circuit parameters are correct first.

Also please explain your test conditions, schematic diagram and layout. Thanks.

Aurora

0 Kevin Huang8 11 months ago in reply to Aurora Tie

Genius 3555 points

Hi Aurora,

In a configuration with an output capacitor of 100uF and a load of 800mA, how can improve the Transient Response?

0 Aurora Tie 11 months ago in reply to Kevin Huang8

TI__Genius 11230 points

Hi,

Maybe you can add more output capacitors and add a suitable feedforward capacitor to get faster loop response. Thanks.

8737.Design Feedforward Capacitor for LMR14020.pdf

7288.Optimizing Transient Response of Internally Compensated DC-DC Converters.pdf

Aurora

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TPS54160: Output voltage drop down

In a configuration with an output capacitor of 100uF and a load of 800mA, how can improve the Transient Response?