LR645N5-G
ActiveLINEAR VOLTAGE REGULATORS, FIXED, 15V TO 450V IN, 10V AND 3MA OUT, TO-220AB-3
Deep-Dive with AI
Search across all available documentation for this part.
LR645N5-G
ActiveLINEAR VOLTAGE REGULATORS, FIXED, 15V TO 450V IN, 10V AND 3MA OUT, TO-220AB-3
Deep-Dive with AI
Technical Specifications
Parameters and characteristics for this part
| Specification | LR645N5-G |
|---|---|
| Current - Output | 3 mA |
| Current - Quiescent (Iq) | 150 çA |
| Mounting Type | Through Hole |
| Number of Regulators | 1 |
| Operating Temperature [Max] | 155 °C |
| Operating Temperature [Min] | -55 °C |
| Output Configuration | Positive |
| Output Type | 1.81 mOhm |
| Package / Case | TO-220-3 |
| PSRR | 60 dB |
| Supplier Device Package | TO-220-3 |
| Voltage - Input (Max) [Max] | 450 V |
| Voltage - Output (Min/Fixed) | 10 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tube | 1 | $ 1.66 | |
| 25 | $ 1.37 | |||
| 100 | $ 1.26 | |||
| Microchip Direct | CTUBE | 1 | $ 1.66 | |
| 25 | $ 1.37 | |||
| 100 | $ 1.26 | |||
| 1000 | $ 1.22 | |||
| 5000 | $ 1.19 | |||
| Newark | Each | 100 | $ 1.31 | |
Description
General part information
LR645 Series
LR645 is a high input voltage, low output current linear regulator. It has a 3-terminal fixed output voltage version available in TO-92, TO-220 and SOT-89 packages, as well as an adjustable voltage version available in an 8-lead SOIC package. The 3-terminal version functions like any other low voltage 3-terminal regulator except it allows the use of much higher input voltages. When used in a SMPS start-up circuit, it eliminates the need for large power resistors. In this application, current is drawn from the high voltage line only during start-up. Only leakage current flows after start-up, thereby reducing the continuous power dissipation to a few milliwatts.
The adjustable voltage version allows trimming of the output voltage from 8.0 to 12V. This version can also be connected to an external depletion mode MOSFET for increased output current. When used in conjunction with depletion mode MOSFET DN2540N5, an output current of up to 150mA is achieved.
Documents
Technical documentation and resources
