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- The size of pmos pass transistor in LDO regulator
pmos pass transistor Hi, all I am designing a LDO regulator, the minimal power supply voltage is 4 75V, and the output voltage is 4 5V, the maximum output current is 20mA In order to assure the pmos pass transistor operating in saturation, I have to set a large W L, but i can not provide this
- LDO design issue - no load condition | Forum for Electronics
Hi I am working on a LDO design that requires a rather large PMOS pass transistor due to the specified max current I have issues with pulling the pass transistor gate high enough at no load conditions to avoid the output voltage creeping upwards due to leakage in the pass transistor In
- Comparison of LDO and level shifter | Forum for Electronics
Re: LDO vs Level shifter Yes, although if good efficiency and good noise performance were required, I would use a switcher to drop most of the voltage then use the LDO to regulate to the final voltage
- behavioral modelling for LDO - Forum for Electronics
For a LDO, I think the most important part is the opamp So, only the opamp need to be described with verilog-a language Spectre provide a lot of behavioral module in its ahdlLib and you can find what you want Otherwise, you can build your own verilog-a module by refer to the verylog-a Reference
- Why PMOS used in LDO more than NMOS? | Forum for Electronics
nmos ldo compensation but in Low Drop-Out Regulator, Pmos is used to achieve lower voltage drop how can Pmos do that other than Nmos?it seems that lower Ron is not the reason
- How to improve LDOs transient response? | Forum for Electronics
ldo frequency and transient response Some commercial chips like TI's add comparators to control overshoot and undershoot When undershoot is detected, sourcing current will be increased and when overshoot is detected, a sinking current will pull low the output
- How to measure psrr of LDO? | Forum for Electronics
how to measure psrr hi,all Can anybody suggest me how to measure psrr of LDO? Could anybody suggest the ways and the required instruments I need to use? Thanks a lot
- How to properly do AC open loop LDO simulation?
how to do ac analysis of ldo another way is add a large inductor on you feedback path, and a capacitor connect to ground from opamp side this may help you to do AC simulation
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