LDO29300P2MTR

[saran]

We have implemented the following circuit. This matches the application circuit given in datasheet of LDO29300P2MTR.But it does not yield expected output. We need help!!

[Andrew Neil]

---

@saran wrote:

 it does not yield expected output. !!

---

So what output does it yield ?

---

@saran wrote:

---

What is the significance of the 5.41A there?

The LD29300 is only a 3A regulator ...

https://www.st.com/en/power-management/ld29300.html 

---

@saran wrote:

This matches the application circuit given in datasheet 

---

Not quite:

You've left the INH pin open.

[saran]

The IC takes an input voltage of 24V/5.4A , expected output is 12V BUT IT GIVES 0V . Also where should I connect the INH pin.

[Peter BENSCH]

+1

And for an output voltage of 12V that can be set within narrower limits, I would replace VR1 with 1k and connect an 8.2k resistor in series to VR1. The output voltage should then be adjustable between approx. 11.2V-12.6V.

[Andrew Neil]

---

@saran wrote:

The IC takes an input voltage of 24V/5.4A 

---

The IC takes an input voltage; the current is determined by the load.

---

@saran wrote:

expected output is 12V BUT IT GIVES 0V . .

---

The output depends on R1 - so what do you have that set to?

---

@saran wrote:

where should I connect the INH pin.

---

As the datasheet shows - connect it high for 'ON', or low for 'OFF':

[saran]

@Andrew Neil

R1 value is 10Kohm ; R2 is 1Kohm

[Peter BENSCH]

@saran Let me tell you what is meant by INH=H: simply connect INH (pin 1) to INPUT (pin 2) to switch the LD29300 on permanently. If you connect pin 1 to GND, you switch it off.

[saran]

@Peter BENSCH

I have shorted pin 1 and pin 2. Still, the output is 0V. If you have any sample circuits for the LDO29300P2MTR, kindly help me solve the issues.

[Andrew Neil]

Then check your resistors & wiring.

Perhaps show a good, clear photograph of your setup.

[saran · Accepted solution]

@Andrew Neil 

I have attached the images for your reference. Kindly let me know if I have made any mistakes