Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Regulator Type | Fixed-output buck regulator |
| Output Voltage | 5 V |
| Output Current | Up to 3 A |
| Input Voltage | 4.5 V to 40 V |
| Switching Frequency | 150 kHz nominal |
| Package | TO-263-5 / KTT, tape and reel |
Product Overview
LM2596SX-5.0/NOPB is the fixed 5 V tape-and-reel TO-263 member of Texas Instruments’ LM2596 SIMPLE SWITCHER family. It integrates the power switch required for a non-isolated buck converter and is intended to reduce external circuitry to the inductor, catch diode, input/output capacitors and supporting layout.
The main design question is not only whether the load is below 3 A. Inductor saturation current, diode current and reverse-voltage rating, capacitor ripple current and ESR, switching-loop layout and package temperature all affect whether the converter can sustain the required operating point.
Technical Specifications
| Group | Parameter | Value / Condition |
|---|---|---|
| Topology | Converter type | Buck / step-down |
| Input | Operating range | 4.5 V to 40 V |
| Output | Fixed voltage | 5 V |
| Output | Load current | Up to 3 A |
| Switching | Frequency | 150 kHz nominal |
| Package | Type | TO-263-5 / KTT |
| Packing | Format | Tape and reel |
Functional Highlights
Wide input range supports common intermediate rails
The 40 V upper input limit allows use from 12 V and 24 V class sources when normal operation and expected transients stay within the datasheet limits.
Fixed 5 V output removes the external feedback divider
The fixed-output variant simplifies the voltage-setting network, but the magnetic, diode and capacitor selections still need to follow TI’s design procedure for the actual VIN and load range.
Applications / Application Fit
- 12 V or 24 V class rails stepped down to 5 V
- Industrial and embedded power rails that need a simple non-isolated buck stage
- Service or BOM-controlled builds requiring the exact TI orderable code
Design Considerations
Select the inductor for both required inductance and saturation current at the worst-case operating point.
Keep the switch-current loop compact and follow TI layout guidance to reduce ringing and EMI.
Check TO-263 thermal performance and copper area at high load, especially when VIN is well above 5 V.
Related Engineering Resources
- Texas Instruments LM2596 official product page — manufacturer-controlled product information and documentation.
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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