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Texas Instruments LM2590HVSX-5.0/NOPB
- Part No.:
- LM2590HVSX-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
LM2590HVSX-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:1,548
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Product details
Overview
LM2590HVSX-5.0/NOPB from Texas Instruments is a monolithic 1-A, 150-kHz non-synchronous step-down (buck) DC-DC converter with fixed 5.0-V output, 4.5–60-V input range, and integrated shutdown/soft-start and error flag functions. It delivers stable regulation under 0.2–1-A load across –40°C to +125°C, used in industrial power supplies and embedded systems requiring high-efficiency conversion from unregulated DC sources.
For engineers reviewing the LM2590HVSX-5.0/NOPB datasheet, LM2590HVSX-5.0/NOPB pinout, LM2590HVSX-5.0/NOPB application, or LM2590HVSX-5.0/NOPB equivalent, key selection criteria include input voltage headroom up to 60 V, ±4% output voltage tolerance over line/load/temperature, thermal shutdown protection, 90 µA standby current, and compatibility with standard TO-263-7 surface-mount PCB layouts.
Technical Context
The LM2590HVSX-5.0/NOPB integrates a PWM controller, power switch, internal frequency compensation, and supervisory circuitry into a single TO-263-7 package. Its 150-kHz fixed-frequency oscillator enables compact external filter design using standard 33–68 µH inductors and low-ESR electrolytic capacitors.
It operates in continuous conduction mode at full 1-A load with typical 82% efficiency at 12-V input/5-V output, and includes dual-stage current limiting, thermal shutdown, and an open-collector error flag with programmable delay via external capacitor on Pin 5 - all without requiring external loop compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full line/load/temperature range - ensures stable logic supply without external feedback resistors. |
| Input Voltage Range | 4.5 V to 60 V - supports wide-range industrial, automotive, and telecom inputs including 24-V and 48-V rails. |
| Max Output Current | 1 A DC - sufficient for powering microcontrollers, sensors, and interface ICs directly from unregulated sources. |
| Switching Frequency | 150 kHz (±15%) - balances efficiency and EMI while enabling use of cost-effective, off-the-shelf inductors ≥33 µH. |
| Quiescent Current | 90 µA typical in shutdown - minimizes standby power loss in battery-backed or energy-sensitive systems. |
| Thermal Protection | Internal thermal shutdown at 150°C junction temperature - prevents damage during overload or poor heatsinking. |
| Output Regulation Accuracy | ±4% max over –40°C to +125°C - meets requirements for industrial control and instrumentation without trimming. |
Pinout & Package
LM2590HVSX-5.0/NOPB uses the KTW (TO-263-7) surface-mount package: 10.10 mm × 8.89 mm body, exposed thermal pad for enhanced heat dissipation, and 7 leads arranged in single-row configuration with Pin 1 (VIN) at left when tab side faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Positive input supply | Accepts 4.5–60 V DC; requires ≥330 µF low-ESR input capacitor to handle switching transients and peak currents. |
| 2 - Output | Internal power switch drain | Drives external catch diode and inductor; swings between ~VIN–0.95 V and –0.5 V during operation. |
| 3 - Flag | Open-collector error flag | Active-low signal (≤0.7 V @ 3 mA sink) when output drops below 95% of 5.0 V; requires external pull-up resistor. |
| 4 - GND | Circuit ground reference | Common return for internal circuits, feedback path, and thermal pad connection; must be low-impedance PCB plane. |
| 5 - Delay | Flag delay timing node | Charged by 3 µA internal current source; sets power-good assertion delay via external capacitor (e.g., 0.1 µF = ~43 ms). |
| 6 - Feedback | Regulation sense input | Internally connected to 5.0-V output; not user-accessible in fixed versions - eliminates feedback resistor network. |
| 7 - SD/SS | Shutdown/Soft-start control | Drives device ON/OFF (≤0.6 V = shutdown, ≥2 V = active); capacitor here controls output voltage ramp rate during startup. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated soft-start | Programmable output voltage ramp via external capacitor on SD/SS pin - prevents inrush current and stabilizes upstream supplies. |
| Power-good flag with delay | Open-collector Flag pin asserts after user-defined delay (via CDELAY), enabling sequenced system power-up and fault detection. |
| Wide-input operation | Supports 4.5–60 V input without external components - eliminates need for pre-regulators in 24-V/48-V industrial systems. |
| Robust protection suite | Includes thermal shutdown, two-stage current limiting, and undervoltage lockout - ensures reliable operation under fault conditions. |
| High-efficiency buck topology | Typical 82% efficiency at 12-V input/5-V/1-A output - reduces thermal load and improves system power density vs. linear regulators. |
Applications
| Industrial Power Supply | Automotive Control Unit |
|---|---|
Use Scenario: Converting 24-V vehicle battery or 48-V telecom rail to stable 5-V logic supply for ECUs and CAN transceivers. IC Role / Device Role / Timing Role: Primary non-isolated step-down regulator delivering regulated 5.0 V to microcontroller, memory, and peripheral ICs. Use Value: Withstands load dump transients up to 60 V and operates reliably from –40°C to +125°C ambient - meets AEC-Q100 stress requirements. | Use Scenario: Providing clean 5-V supply to engine control modules where space and thermal management are constrained. IC Role / Device Role / Timing Role: High-efficiency buck converter replacing linear regulators to reduce heat generation and improve fuel economy. Use Value: 82% typical efficiency at 1-A load cuts power dissipation by >3 W vs. linear solution - lowers heatsink mass and board area. |
| Embedded Sensor Hub | Programmable Logic Controller (PLC) |
Use Scenario: Powering multi-sensor nodes (temperature, pressure, IMU) in factory automation gateways with limited PCB real estate. IC Role / Device Role / Timing Role: Compact, self-contained DC-DC stage converting 12–36 V field bus voltage to precise 5.0 V for analog front-ends and ADCs. Use Value: ±4% output accuracy over temperature ensures consistent sensor calibration; 90 µA shutdown current extends battery life in sleep modes. | Use Scenario: Generating local 5-V rail for I/O modules and communication interfaces (RS-485, Ethernet PHY) inside DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Robust, high-current buck regulator interfacing directly with noisy 24-V industrial power buses. Use Value: Integrated current limiting and thermal shutdown prevent latch-up during short-circuit events on field wiring - improves system uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2590T-5.0 | Same architecture and specs, but in TO-220-7 package with vertical lead form - higher RθJA (50°C/W vs. 20°C/W for TO-263 with 3 in² copper). | Preferred for prototyping or through-hole assembly; less suitable for high-density or thermally constrained SMT designs. | Select LM2590T-5.0 only when manual soldering, heatsink mounting, or legacy footprint compatibility is required. |
| LM2596HV-5.0 | Higher 150-kHz frequency (same), but rated for 3-A output and wider 4–60-V input; different pinout and larger TO-220/TO-263 packages. | Used where future current scalability or tighter input regulation is needed; not drop-in due to pin mismatch and layout changes. | Choose LM2596HV-5.0 only if >1-A load headroom or improved light-load efficiency is confirmed necessary. |
Compared with LM2590T-5.0, LM2590HVSX-5.0/NOPB offers superior thermal performance in SMT layouts; compared with LM2596HV-5.0, it provides optimal cost/size trade-off for verified 1-A applications without overdesigning current capability.
Availability
LM2590HVSX-5.0/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive control units, embedded sensor hubs, and programmable logic controllers requiring stable component supply with long-term manufacturability.
Supply support for LM2590HVSX-5.0/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability power conversion ICs.
The LM2590HV product line was designed specifically for rugged, high-input-voltage step-down applications in industrial, automotive, and telecom infrastructure - prioritizing simplicity, thermal robustness, and minimal external component count.
FAQ
What is the maximum input voltage rating for LM2590HVSX-5.0/NOPB?
The absolute maximum input voltage for LM2590HVSX-5.0/NOPB is 63 V, but the recommended operating range is 4.5 V to 60 V DC. Operation above 60 V risks exceeding safe operating area limits and may trigger internal protection circuits. For sustained reliability in 48-V systems, ensure transient suppression per TI's application guidelines for LM2590HVSX-5.0/NOPB.
Does LM2590HVSX-5.0/NOPB require external feedback resistors to set the output voltage?
No, LM2590HVSX-5.0/NOPB is a fixed-output version with internal 5.0-V feedback divider. Pin 6 (Feedback) is internally connected to the output, eliminating external resistors. This simplifies layout, improves accuracy, and removes drift sources - a key distinction from the adjustable LM2590HV-ADJ variant.
How does the error flag (Flag pin) function on LM2590HVSX-5.0/NOPB?
The Flag pin on LM2590HVSX-5.0/NOPB is an open-collector output that pulls low (≤0.7 V) when the regulated 5.0-V output falls below 95% of nominal (i.e., <4.75 V). It remains high (via external pull-up) when in regulation. Its assertion is delayed by an external capacitor on Pin 5, enabling clean power-good signaling in sequenced systems using LM2590HVSX-5.0/NOPB.
What thermal performance can be expected from LM2590HVSX-5.0/NOPB in a standard PCB layout?
With the TO-263-7 package's exposed thermal pad soldered to ≥3 in² of 1-oz copper on the LM2590HVSX-5.0/NOPB side and ~16 in² on the opposite layer, RθJA is 20°C/W. At 1-A load and 12-V input, this yields ~2.5 W dissipation and ~50°C junction rise above ambient - well within the 150°C limit. Smaller copper areas increase thermal resistance proportionally.
Can LM2590HVSX-5.0/NOPB be used in discontinuous conduction mode (DCM)?
Yes, LM2590HVSX-5.0/NOPB operates naturally in DCM at light loads (<250 mA), as confirmed by TI's Figure 21 waveforms. Its 150-kHz fixed frequency and internal compensation maintain stability without external adjustments. Efficiency drops slightly in DCM, but regulation accuracy and transient response remain within spec - validated in LM2590HVSX-5.0/NOPB test data.
LM2590HVSX-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 150kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-7)
LM2590HVSX-5.0/NOPB FAQ
1.How can I place an order for LM2590HVSX-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2590HVSX-5.0/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM2590HVSX-5.0/NOPB reliable?
The price and inventory of LM2590HVSX-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2590HVSX-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2590HVSX-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2590HVSX-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2590HVSX-5.0/NOPB?
LM2590HVSX-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2590HVSX-5.0/NOPB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM2590HVSX-5.0/NOPB?
For technical support, including LM2590HVSX-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2590HVSX-5.0/NOPB requirements.
6.How does Aetrix verify that LM2590HVSX-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2590HVSX-5.0/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM2590HVSX-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2590HVSX-5.0/NOPB?
All LM2590HVSX-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2590HVSX-5.0/NOPB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM2590HVSX-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2590HVSX-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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