LM2596SX-3.3/NOPB
| Parameters | |
|---|---|
| Series | SIMPLE SWITCHER® |
| Package / Case | TO-263-6, D²Pak (5 Leads + Tab), TO-263BA |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Voltage - Input (Max) | 40V |
| Output Type | Fixed |
| Number of Outputs | 1 |
| Current - Output | 3A |
| Supplier Device Package | DDPAK/TO-263-5 |
| Output Configuration | Positive |
| Function | Step-Down |
| Topology | Buck |
| Frequency - Switching | 150kHz |
| Synchronous Rectifier | No |
| Voltage - Output (Min/Fixed) | 3.3V |
| Voltage - Output (Max) | - |
| Voltage - Input (Min) | 4.5V |
| Package | Bulk |
| Product Status | Active |
| Standard Package | 1 |
| HTSUS | 0000.00.0000 |
LM2596SX-3.3/NOPB Buck Switching Regulator IC Positive Fixed 3.3V 1 Output 3A
The LM2596SX-3.3/NOPB from Texas Instruments is a monolithic buck (step-down) switching regulator IC that delivers a fixed 3.3 V output at up to 3 A continuous current from an input voltage range of 4.5 V to 40 V. Operating at a fixed 150 kHz switching frequency, it achieves high efficiency up to 90% with minimal external components, making it ideal for space-constrained and cost-sensitive designs. The device integrates the power switch, oscillator, and control circuitry, and is housed in a TO-263-5 (DDPAK/TO-263) surface-mount package with an exposed thermal pad for efficient heat dissipation. It supports a junction temperature range of −40 °C to +125 °C and includes built-in protection features such as cycle-by-cycle current limiting and thermal shutdown, ensuring reliable operation in harsh environments.
LM2596SX-3.3/NOPB step-down switching regulator IC Key Features
The LM2596SX-3.3/NOPB employs a fixed-frequency, current-mode PWM architecture that provides excellent line and load regulation, fast transient response, and low output ripple. It requires only a few external passive components—an inductor, input/output capacitors, and feedback resistors—to form a complete buck converter, significantly reducing board area and design complexity. The regulator features a low quiescent current and supports an external shutdown pin that reduces supply current to a few microamps, making it suitable for battery-powered applications.
Alternative Buck Regulator Models
● LM2596S-3.3/NOPB: A functionally equivalent 3.3 V, 3 A buck regulator in a similar TO-263 package, offering the same input range and protection features for easy drop-in replacement.
● LM2596SX-5.0/NOPB: A fixed 5 V output version of the same LM2596 family, suitable for systems requiring a 5 V rail instead of 3.3 V, with identical current and protection capabilities.
● LM2596SX-ADJ/NOPB: An adjustable output version of the LM2596 series, supporting output voltages from 1.23 V to 37 V via external resistors, ideal for flexible power supply designs.
● MP1584: A 3 A buck regulator from Monolithic Power Systems with higher switching frequency and efficiency, suitable for compact, high-density designs requiring similar current and voltage ranges.
