Specification
- Input voltage: up to 15 V
- Output voltage: 3,3 V
- Maximum output current: 0,95 A
- Casing: TO-220
- Sold for 5 pieces.
Details in thedocumentation.
LDO Stabilizer 3,3V / 800 mA
Brand-name linear stabilizer type LDO - LD1117 (designation on the housing: LD33V), manufactured by ST Microelectronics. The circuit offered in several different types of housings (both THT and SMD) here is available in TO220 size for threaded mounting. Output voltage is 3.3 V (suitable e.g. for STM32 microcontrollers) and maximum load is 800 mA.
LDO 3.3V LD1117V33 - THT TO220 - 5 pcs. is well protected - it has internal circuits that switch off the output when the temperature of the semiconductor structure is exceeded (e.g. in case of improper cooling), as well as in case of exceeding the output current. The voltage at the stabilizer input should not exceed (under no operating conditions) 15 V.
Principles of using LDO stabilisers
When using linear stabilizers, it is important to remember about the rules of their proper selection for a given application. Of course, under no circumstances should the maximum values of output current and input voltage be exceeded. But is there a limit to the minimum value of the stabilizer supply voltage? The answer is yes, and the exact value of the threshold depends on the type of system and operating conditions.
For correct stabilization of ripples and voltage fluctuations the stabilizer "needs" a certain minimum voltage drop, measured between the input and output of the system (Ud = Uin-Uout). For LD1117V33, the minimum value ofUdis 1 V - so the input voltage should never fall below the threshold: 1V + 3.3 V = 4.3 V. In the system catalog note you can find maximumthrustvalues - for a load of 800 mA this voltage can increase to 1.2 V.
