Hi Aaron,
Could you provide a scope shot and schematic for us to be able to help debug?
Please note that while TPS731 is stable without an output capacitor, the addition of an output capacitor and a feedforward capacitor will improve transient response…
Hi Alfred,
TPS731 may be a good option for your application. I do not see information about which LT1761 you are currently using and LT1761 has three potential pinouts.
Please note that the parametric search found at ti.com/LDO is a great resource…
Other Parts Discussed in Thread: LM2621 , TPS731 , LM2623 I'm working with the LM2621.
My Power Supply is a Li-Po battery with voltage range between 4.2V to 3V
With 4.2V, I can get my 5.5V perfectly. No ripple, no noise, nothing. Just Perfect!
When I…
Hi Tim,
0603 ceramic X5R or X7R capacitors with 0.1uF-1uF of capacitance (including derating) can be used at the input for TPS731. Be sure the capacitor is close to the input pin of the device.
Regards,
Darwin
Hi Shashank,
The efficiency of an LDO is dependent on the output power and input power, specifically, Vout*Iout/ [(Iout+Iq)*Vin]. The TPS731 operates with an Iq in the 100's of uA while the TPS780 operates in the 100's of nA.
For a 1.8V low Iq…
HI Sato-san,
We have many LDO's that can meet the above specification but only a few with a fixed 4.0V output voltage. The LP5907 is one which may be a good choice.
Please let me know what you think.