Technical Specifications
Parameters and characteristics for this part
| Specification | L4973D5.1-013TR |
|---|---|
| Current - Output | 3.5 A |
| Frequency - Switching [Max] | 300 kHz |
| Frequency - Switching [Min] | 100 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 150 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Type | Adjustable (Fixed) |
| Package / Case | 20-SOIC |
| Package / Case [y] | 0.295 in |
| Package / Case [y] | 7.5 mm |
| Supplier Device Package | 20-SO |
| Synchronous Rectifier | False |
| Topology | Buck |
| Voltage - Input (Min) [Min] | 8 V |
| Voltage - Output (Max) [Max] | 50 V |
| Voltage - Output (Min/Fixed) | 5.1 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 5.67 | |
| 10 | $ 5.09 | |||
| 25 | $ 4.82 | |||
| 100 | $ 4.17 | |||
| 250 | $ 3.96 | |||
| 500 | $ 3.55 | |||
| Digi-Reel® | 1 | $ 5.67 | ||
| 10 | $ 5.09 | |||
| 25 | $ 4.82 | |||
| 100 | $ 4.17 | |||
| 250 | $ 3.96 | |||
| 500 | $ 3.55 | |||
| Tape & Reel (TR) | 1000 | $ 3.00 | ||
| 2000 | $ 2.85 | |||
Description
General part information
L4973 Series
The L4973 is a step down monolithic power switching regulator delivering 3.5A at fixed voltages of 3.3V or 5.1V and using a simple external divider output adjustable voltage up to 50V. Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical RDS(on)of 0.15Ω) to obtain very high efficiency and very fast switching times. Switching frequency up to 300KHz are achievable (the maximum power dissipation of the packages must be observed).
A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 40V cover the majority of the today applications. Features of this new generation of DC-DC converter includes pulse by pulse current limit, hiccup mode for output short circuit protection, voltage feed forward regulation, soft start, input/output synchronization, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown. Packages available are in plastic dual in line, DIP- 18 (12+3+3) for standard assembly, and SO20 (12+4+4) for SMD assembly.