elsey.jack
New Member
Hello everyone,
I have done several projects involving 7805 voltage regulators. Noob that I am, however, I have never worked on a project where logic high is +3.3 V.
I have been trying for the past hour or so to get a LD33V voltage regulator working, but I can only conclude that there is something wrong with either me or the chip (although I will cede that is is most likely the former). Here is a **broken link removed** of the voltage regulator I am using.
The pinout from the datasheet (PDF) is as follows, from left to right: ground, Vout, and Vin. However, when I connect the regulator following this pinout to a power supply (which works fine with my 7805 voltage regulators) I only get a measly 700 mV between Vout and ground!![Frown :( :(](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I have tried varying the capacitors, removing the capacitors altogether, and even wiring it like a 7805, all without the desired result. Other possibly relevant information is as follows:
Am I missing something here? Any guidance would very much be appreciated.
I have done several projects involving 7805 voltage regulators. Noob that I am, however, I have never worked on a project where logic high is +3.3 V.
I have been trying for the past hour or so to get a LD33V voltage regulator working, but I can only conclude that there is something wrong with either me or the chip (although I will cede that is is most likely the former). Here is a **broken link removed** of the voltage regulator I am using.
The pinout from the datasheet (PDF) is as follows, from left to right: ground, Vout, and Vin. However, when I connect the regulator following this pinout to a power supply (which works fine with my 7805 voltage regulators) I only get a measly 700 mV between Vout and ground!
I have tried varying the capacitors, removing the capacitors altogether, and even wiring it like a 7805, all without the desired result. Other possibly relevant information is as follows:
- The voltage being supplied by the power supply drops from about 9 volts to about 6 volts when I have it connected to the regulator. This voltage only drops to about 8 volts when connected to my beloved 7805's.
- The regulator warms, but does not get hot.
- There is a direct connection between the heat sink and the central pin, which (according to the datasheet) is Vout.
- The regulator draws about 100 mA when connected.
Am I missing something here? Any guidance would very much be appreciated.