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Texas Instruments LM2590HVSX-ADJ/NOPB
- Part No.:
- LM2590HVSX-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
LM2590HVSX-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:2,581
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Product details
Overview
LM2590HVSX-ADJ/NOPB from Texas Instruments is a monolithic 1-A, 150-kHz non-synchronous step-down (buck) DC-DC converter with adjustable output (1.2 V to 57 V), ±4% output voltage tolerance over line/load/temperature, and input voltage range up to 60 V. It integrates internal frequency compensation, thermal shutdown, current limiting, and an out-of-regulation error flag - used in industrial power supplies requiring high-input-voltage regulation.
For engineers reviewing the LM2590HVSX-ADJ/NOPB datasheet, LM2590HVSX-ADJ/NOPB pinout, LM2590HVSX-ADJ/NOPB application, or LM2590HVSX-ADJ/NOPB equivalent, key selection criteria include its 60-V max input rating, 1-A guaranteed load current, 90 µA standby quiescent current in shutdown, programmable soft-start via SD/SS pin, and delay-controlled power-good flag functionality.
Technical Context
The LM2590HVSX-ADJ/NOPB implements a fixed-frequency (150 kHz) current-mode buck topology with integrated 3-A switch, internal 1.23-V reference, and feedback-based output regulation. Its error amplifier compares the resistive divider voltage at the Feedback pin against the 1.23-V reference to control duty cycle.
It features dual-stage current limiting (peak and foldback), thermal shutdown at ~150°C junction temperature, and dedicated pins for shutdown/soft-start (SD/SS), error flag (Flag), and flag delay timing (Delay). The Flag pin provides open-collector power-good signaling with user-programmable delay via external capacitor on Pin 5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 60 V - supports wide-range industrial/unregulated DC inputs including 24 V, 48 V, and 56 V bus systems. |
| Output Current | 1 A guaranteed - delivers full rated load across –40°C to +125°C junction temperature range. |
| Switching Frequency | 150 kHz (±15%) - enables use of compact magnetics and low-ESR electrolytic output capacitors. |
| Feedback Reference | 1.23 V (±2.7%) - sets output voltage via external resistor divider; enables precise 1.2 V–57 V adjustment range. |
| Quiescent Current (Shutdown) | 90 µA typical - minimizes system standby power loss in battery-backed or energy-sensitive applications. |
| Output Voltage Accuracy | ±4% over line, load, and temperature - ensures stable regulation without post-regulation trimming. |
| Thermal Protection | Internal thermal shutdown - latches off until junction cools, preventing damage during overload or poor heatsinking. |
Pinout & Package
LM2590HVSX-ADJ/NOPB is supplied in a 7-pin TO-263 (KTW) surface-mount package with exposed thermal pad (10.10 mm × 8.89 mm nominal body size), optimized for high-power density and thermal performance on PCBs with ≥0.5 in² copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Positive input supply | Accepts 4.5–60 V unregulated DC; requires local 330 µF low-ESR input capacitor to handle high di/dt switching currents. |
| 2 - Output | Internal power switch drain | Drives external catch diode and inductor; swings between ≈(VIN – 1.2 V) and ≈–0.5 V during operation. |
| 3 - Flag | Open-collector error flag | Asserts low (≤1 V) when output drops below 95% of set value; requires external pull-up resistor (e.g., 4.7 kΩ). |
| 4 - GND | Circuit ground reference | Common return for internal circuitry, feedback network, and thermal pad; must be connected to large copper pour. |
| 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 | Voltage sense input | Compares resistive divider output against 1.23 V reference; determines regulated output voltage (VOUT = 1.23 × (1 + R1/R2)). |
| 7 - SD/SS | Shutdown/Soft-start control | Pulled high (>2 V) for normal operation; driven low (≤0.6 V) for shutdown (90 µA IQ); capacitor adds controlled output ramp. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output voltage range | 1.2 V to 57 V - supports diverse system rails (e.g., 3.3 V, 5 V, 12 V, 24 V, 48 V) using only two external resistors. |
| Integrated error flag with programmable delay | Enables reliable power-good signaling with user-defined startup hold-off - critical for FPGA/CPU sequencing and fault logging. |
| Low 90 µA shutdown current | Reduces standby power in always-on systems (e.g., IoT gateways, remote sensors) without external enable circuitry. |
| Fixed 150-kHz switching frequency | Ensures predictable EMI profile and simplifies filter design - avoids audible noise and enables smaller LC components vs. lower-frequency alternatives. |
| Thermal and current protection | Self-protecting under short-circuit, overload, or inadequate heatsinking - eliminates need for external fault management logic. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Regulating 48 V vehicle battery down to 5 V for microcontroller and sensor subsystems in harsh under-hood environments. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator providing stable 5 V rail with built-in thermal/current protection and power-good flag for safe MCU boot. Use Value: Eliminates need for external supervision circuitry; ±4% output accuracy ensures reliable digital logic operation across –40°C to +125°C. | Use Scenario: Converting 24 V factory automation bus to 3.3 V for PLC I/O modules requiring high immunity to voltage transients. IC Role / Device Role / Timing Role: High-input-voltage step-down converter with 60 V absolute max rating, enabling direct connection to unregulated industrial DC buses. Use Value: Withstands 63 V transient surges per datasheet; 150 kHz switching allows compact 33 µH inductor and 220 µF output capacitor footprint. |
| Telecom Remote Radio Unit | Test Equipment Power Subsystem |
Use Scenario: Generating 12 V from 48 V telecom rectifier output to power RF amplifiers and bias circuits in outdoor base stations. IC Role / Device Role / Timing Role: Efficient preregulator preceding LDOs, delivering 1 A with >76% efficiency at 12 V/1 A (VIN = 12 V). Use Value: 1-A guaranteed output and 90 µA shutdown current extend uptime during brownouts and reduce idle power in sleep modes. | Use Scenario: Providing adjustable 1.2–30 V output for benchtop power supplies and automated test fixtures requiring flexible DUT powering. IC Role / Device Role / Timing Role: Core adjustable buck controller enabling precise voltage setting via front-panel potentiometer or DAC-driven resistor divider. Use Value: 1.23 V reference tolerance (±2.7%) and ±4% total output error ensure calibration-grade stability without trimming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596HV-ADJ/NOPB | Lower 150-kHz frequency (same), but 3-A switch, higher 63-V max input, no flag/delay pins. | Lacks power-good signaling and programmable delay; suited for higher-current, simpler systems without sequencing needs. | Select when >1 A load or tighter input voltage margin (63 V) is required, and flag functionality is unnecessary. |
| TPS54160DGQ | 1.5-A synchronous buck, 100 V input, 2.5 V to 60 V adjustable output, integrated high-side FET, no flag pin. | Higher efficiency due to synchronous rectification; lacks dedicated error flag and delay timing capability. | Choose for improved efficiency (>90% typical) and ultra-wide input range, accepting trade-off of no power-good flag. |
Compared with LM2590HVSX-ADJ/NOPB, LM2596HV-ADJ/NOPB offers higher current capacity but omits supervisory features, while TPS54160DGQ improves efficiency and input range but removes the integrated flag/delay function essential for power sequencing.
Availability
LM2590HVSX-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control units, telecom remote radio units, and test equipment requiring stable component supply with long-term manufacturability.
Supply support for LM2590HVSX-ADJ/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 ICs, with decades of expertise in high-reliability power conversion solutions.
The LM2590HV product line was designed for rugged, high-input-voltage DC-DC conversion in industrial, automotive, and telecom applications where simplicity, thermal robustness, and integrated protection are critical.
FAQ
What is the maximum input voltage rating for LM2590HVSX-ADJ/NOPB?
The LM2590HVSX-ADJ/NOPB has an absolute maximum input voltage rating of 63 V and a recommended operating range of 4.5 V to 60 V. This makes it suitable for 48 V industrial buses and automotive systems with load-dump transients. Exceeding 63 V risks permanent damage, per TI's SNVS084C datasheet Absolute Maximum Ratings table.
How does the Feedback pin function in LM2590HVSX-ADJ/NOPB?
The Feedback pin on LM2590HVSX-ADJ/NOPB senses the output voltage via an external resistor divider and compares it to an internal 1.23-V reference. For the adjustable version, VOUT = 1.23 × (1 + R1/R2). The pin draws only 10–100 nA bias current, minimizing divider power loss and enabling high-resistance networks for precision tuning.
Can LM2590HVSX-ADJ/NOPB be used in synchronous rectification configurations?
No, LM2590HVSX-ADJ/NOPB is a non-synchronous buck regulator and requires an external Schottky catch diode (e.g., 1N5824). It does not support synchronous rectification because it lacks a complementary low-side driver. For synchronous operation, consider TI's TPS54x60 family instead.
What is the purpose of the Delay pin (Pin 5) on LM2590HVSX-ADJ/NOPB?
The Delay pin on LM2590HVSX-ADJ/NOPB controls the time interval between output regulation and Flag pin assertion (power-good). An external capacitor (e.g., 0.1 µF) charges via a 3 µA internal current source; Flag goes high when Delay pin voltage exceeds 1.25 V, enabling precise power sequencing in multi-rail systems.
Does LM2590HVSX-ADJ/NOPB include thermal protection?
Yes, LM2590HVSX-ADJ/NOPB includes internal thermal shutdown that activates at approximately 150°C junction temperature. When triggered, the device halts switching and remains latched off until the die cools sufficiently. This protects against damage during sustained overload, poor PCB heatsinking, or ambient temperature extremes.
LM2590HVSX-ADJ/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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 57V
- 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-ADJ/NOPB FAQ
1.How can I place an order for LM2590HVSX-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2590HVSX-ADJ/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-ADJ/NOPB reliable?
The price and inventory of LM2590HVSX-ADJ/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-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM2590HVSX-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2590HVSX-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2590HVSX-ADJ/NOPB?
LM2590HVSX-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2590HVSX-ADJ/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-ADJ/NOPB?
For technical support, including LM2590HVSX-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2590HVSX-ADJ/NOPB requirements.
6.How does Aetrix verify that LM2590HVSX-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2590HVSX-ADJ/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-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM2590HVSX-ADJ/NOPB?
All LM2590HVSX-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2590HVSX-ADJ/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-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM2590HVSX-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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