LM2673SX-3.3/NOPB
Active8V TO 40V, 3A SIMPLE SWITCHER® BUCK CONVERTER WITH ADJUSTABLE CURRENT LIMIT
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LM2673SX-3.3/NOPB
Active8V TO 40V, 3A SIMPLE SWITCHER® BUCK CONVERTER WITH ADJUSTABLE CURRENT LIMIT
Technical Specifications
Parameters and characteristics for this part
| Specification | LM2673SX-3.3/NOPB |
|---|---|
| Current - Output | 3 A |
| Frequency - Switching | 260 kHz |
| Function | Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Type | 1.81 mOhm |
| Package / Case | D2PAK (7 Leads + Tab), TO-263-8, TO-263CA |
| Supplier Device Package | TO-263 (DDPAK-7) |
| Synchronous Rectifier | False |
| Topology | Buck |
| Voltage - Input (Min) [Min] | 8 V |
| Voltage - Output (Min/Fixed) | 3.3 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 | $ 5.30 | |
| 10 | $ 4.76 | |||
| 25 | $ 4.50 | |||
| 100 | $ 3.90 | |||
| 250 | $ 3.70 | |||
| Digi-Reel® | 1 | $ 5.30 | ||
| 10 | $ 4.76 | |||
| 25 | $ 4.50 | |||
| 100 | $ 3.90 | |||
| 250 | $ 3.70 | |||
| Tape & Reel (TR) | 500 | $ 3.32 | ||
| 1000 | $ 2.80 | |||
| 2500 | $ 2.66 | |||
| Texas Instruments | LARGE T&R | 1 | $ 4.00 | |
| 100 | $ 3.51 | |||
| 250 | $ 2.46 | |||
| 1000 | $ 1.98 | |||
Description
General part information
LM2673 Series
The LM2673 series of regulators are monolithic integrated circuits which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 3-A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3 V, 5 V, and 12 V and an adjustable output version.
The SIMPLE SWITCHER®concept provides for a complete design using a minimum number of external components. A high fixed frequency oscillator (260 kHz) allows the use of physically smaller sized components. A family of standard inductors for use with the LM2673 are available from several manufacturers to greatly simplify the design process.
Other features include the ability to reduce the input surge current at power on by adding a soft-start timing capacitor to gradually turn on the regulator. The LM2673 series also has built-in thermal shutdown and resistor programmable current limit of the power MOSFET switch to protect the device and load circuitry under fault conditions. The output voltage is ensured to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.
Documents
Technical documentation and resources
