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Texas Instruments LM2590HVT-ADJ
- Part No.:
- LM2590HVT-ADJ
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-7 Formed Leads
- Datasheet:
-
LM2590HVT-ADJ.pdf
- Description:
- IC REG BUCK ADJ 1A TO220-7
- Quantity:
- Payment:
- Shipping:
Inventory:4,806
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Product details
Overview
LM2590HVT-ADJ from Texas Instruments is a monolithic 150-kHz non-synchronous step-down DC-DC converter IC designed for high-efficiency buck regulation in industrial and automotive power supplies. It delivers up to 1 A output current, supports input voltages up to 60 V, features adjustable output (1.2 V to 57 V), ±4% output voltage tolerance over line/load/temperature, and integrates shutdown/soft-start and error flag with programmable delay.
For engineers reviewing the LM2590HVT-ADJ datasheet, LM2590HVT-ADJ pinout, LM2590HVT-ADJ application, or LM2590HVT-ADJ equivalent, key selection criteria include its 60-V max input rating, 1-A guaranteed load capability, 150-kHz fixed-frequency operation enabling compact magnetics, thermal shutdown protection, and the dual-function SD/SS pin enabling both enable control and soft-start timing via external capacitor.
Technical Context
The LM2590HVT-ADJ implements a current-mode controlled buck topology with internal 150-kHz oscillator, integrated 3-A switch, and precision 1.23-V feedback reference. Its control loop includes internal frequency compensation and two-stage current limiting-peak detection followed by foldback-to protect under overload and short-circuit conditions.
It operates across –40°C to +125°C junction temperature, uses an internal 7-V clamp on the SD/SS pin, and provides open-collector Flag output with 1.25-V threshold and 3-µA internal charge current on Delay pin for programmable power-good assertion delay. Standby quiescent current is 90 µA typical at 60-V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 60 V - Supports wide-range unregulated inputs including 24-V and 48-V industrial rails. |
| Output Current | 1 A continuous - Ensured minimum load capability without derating at full temperature range. |
| Switching Frequency | 150 kHz (±15%) - Enables use of low-cost, standard-value inductors and reduces EMI compared to lower-frequency alternatives. |
| Feedback Reference | 1.23 V (±2.7%) - Sets output voltage via external resistor divider; enables 1.2 V to 57 V adjustment range. |
| Output Voltage Tolerance | ±4% over line, load, and temperature - Guarantees stable regulation without post-regulation trimming. |
| Standby Quiescent Current | 90 µA typical - Minimizes system standby power loss in always-on applications. |
| Thermal Protection | Internal thermal shutdown - Automatically disables switching above 150°C junction temperature to prevent damage. |
Pinout & Package
LM2590HVT-ADJ is supplied in a 7-pin TO-220 package (NDZ) with tab connected to Pin 2 (Output). The package measures 14.99 mm × 10.16 mm and is designed for vertical mounting with heatsinking via the metal tab.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Positive input supply | Accepts 4.5–60 V DC; requires ≥330 µF low-ESR input capacitor for transient suppression and peak current delivery. |
| 2 - Output | Switch node | Connects to inductor and catch diode anode; internally tied to metal tab for thermal conduction and electrical connection. |
| 3 - Flag | Open-collector error indicator | Asserts low (≤0.7 V) when output drops below 95% nominal; requires external pull-up resistor (e.g., 4.7 kΩ) to logic rail ≤45 V. |
| 4 - Gnd | Power ground | Reference for internal circuitry and return path for feedback, delay, and shutdown currents; must be low-impedance PCB plane. |
| 5 - Delay | Flag delay timing node | Charged by 3-µA internal current source; time to Flag assertion = 0.433 × CDELAY (µF) seconds after output regulation. |
| 6 - Feedback | Voltage sense input | Compares divided output voltage to 1.23-V internal reference; bias current ≤50 nA minimizes divider error. |
| 7 - SD/SS | Shutdown/Soft-start control | Drives low (≤0.6 V) for shutdown (90 µA IQ); capacitor here sets soft-start ramp time (5 µA charge below 1.3 V, 1.6 µA above). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3-A switch with 0.95-V saturation | Enables 1-A output with minimal conduction loss at high input voltages (e.g., 60 V → 5 V). |
| Programmable power-good delay | Delay pin (Pin 5) allows precise timing of Flag assertion using a single capacitor-no external timer IC needed. |
| Two-stage current limit protection | Peak current limit (1.9 A typ.) plus foldback prevents thermal runaway during sustained overload or short-circuit events. |
| Internal frequency compensation | Eliminates need for external compensation network-reduces BOM count and layout sensitivity. |
| Low-power shutdown mode | 90 µA standby current allows integration into battery-backed or energy-sensitive systems without significant leakage penalty. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Converting 24-V vehicle battery or 48-V telecom rail to 3.3-V or 5-V for microcontrollers and sensors. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated DC power with fault signaling to host MCU. Use Value: 60-V input rating withstands load-dump transients; error flag enables real-time power-rail health monitoring. | Use Scenario: Generating 5-V supply for CAN transceivers, LIN interfaces, and door/window control logic in harsh automotive environments. IC Role / Device Role / Timing Role: High-reliability step-down converter with thermal shutdown and undervoltage lockout support. Use Value: ±4% output tolerance ensures stable interface voltage across temperature; 125°C max operating junction temperature meets AEC-Q100 Grade 1 requirements. |
| Programmable Lab Power Supply | Industrial Motor Drive Auxiliary Rail |
Use Scenario: Adjustable output stage in benchtop power supplies where users select 1.2–24 V output via front-panel potentiometer. IC Role / Device Role / Timing Role: Core voltage-setting regulator with feedback divider driven by user-adjustable resistive network. Use Value: 1.23-V reference and low feedback bias current (<50 nA) enable accurate, stable output setting with minimal divider error. | Use Scenario: Providing isolated 15-V gate drive supply and 5-V logic rail for IGBT drivers and control ASICs in variable-frequency drives. IC Role / Device Role / Timing Role: Pre-regulator feeding linear regulators or LDOs to achieve ultra-low-noise auxiliary supplies. Use Value: High efficiency (>76% at 12-V input, 3-V output) reduces heat in enclosed drive enclosures; soft-start prevents inrush into downstream capacitance. |
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-ADJ | Lower 40-V max input voltage; identical pinout, feedback reference, and soft-start architecture. | Suitable only for ≤40-V input systems (e.g., 24-V industrial, not 48-V telecom or automotive load dump). | Select LM2590T-ADJ only if input never exceeds 40 V-reduces cost but sacrifices HV robustness. |
| LM2596HV-ADJ | Same 60-V input rating and 1-A output, but 150-kHz frequency and different pinout (no dedicated Delay pin; Flag function omitted). | Lacks programmable power-good delay and open-collector error flag-requires external supervision circuitry. | Choose LM2596HV-ADJ only when Flag/delay functionality is unnecessary and PCB layout allows rework for different pin assignment. |
Compared with LM2590T-ADJ, LM2590HVT-ADJ adds 20-V input headroom critical for automotive and industrial transients; compared with LM2596HV-ADJ, it provides integrated fault signaling and timing-reducing component count and improving system-level reliability without sacrificing efficiency or thermal performance.
Availability
LM2590HVT-ADJ is available at Aetrix Electronics and suitable for industrial motor drives, automotive body electronics, programmable power supplies, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM2590HVT-ADJ 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The LM2590HV product line was developed as part of TI's SIMPLE SWITCHER® portfolio to provide robust, easy-to-use DC-DC converters requiring minimal external components while maintaining high efficiency and comprehensive protection features for demanding power applications.
FAQ
What is the maximum input voltage rating for LM2590HVT-ADJ?
The LM2590HVT-ADJ has an absolute maximum input voltage rating of 63 V and a recommended operating maximum of 60 V. This high-voltage capability enables direct use with 48-V telecom systems, 24-V industrial buses, and automotive applications subject to load-dump transients. Operation above 60 V risks permanent damage and violates TI's recommended conditions.
How does the LM2590HVT-ADJ achieve adjustable output voltage?
The LM2590HVT-ADJ achieves adjustable output voltage via its Feedback (Pin 6) terminal, which references an internal 1.23-V precision bandgap. An external resistor divider (R1–R2) connects between output and ground, with the divider midpoint fed to Pin 6. Output voltage is calculated as VOUT = 1.23 V × (1 + R1/R2). The LM2590HVT-ADJ datasheet specifies R1 ≈ 1 kΩ and recommends 1% tolerance resistors for stability.
Can the LM2590HVT-ADJ be used in synchronous rectification configurations?
No, the LM2590HVT-ADJ is a non-synchronous buck controller with an integrated NPN bipolar switch and requires an external catch diode (e.g., 1N5824 or Schottky). It does not support synchronous rectification because it lacks a complementary gate driver output or dead-time control. For synchronous operation, consider TI's LM5115 or TPS543x families instead of the LM2590HVT-ADJ.
What is the purpose of the Delay pin (Pin 5) on the LM2590HVT-ADJ?
The Delay pin (Pin 5) on the LM2590HVT-ADJ controls the timing of the open-collector Flag output (Pin 3). An external capacitor charges via a 3-µA internal current source once the output reaches regulation; when the capacitor voltage exceeds 1.25 V, Pin 3 asserts high (via external pull-up), signaling "power good." This provides programmable startup delay without additional timers-critical for sequencing in multi-rail systems using LM2590HVT-ADJ.
Does the LM2590HVT-ADJ require external compensation components?
No, the LM2590HVT-ADJ includes fully internal frequency compensation. Its control loop is optimized for standard buck configurations using typical external components (e.g., 33–100 µH inductor, 220 µF output capacitor). No external RC networks or compensation capacitors are required-simplifying design, reducing BOM count, and improving layout robustness compared to controllers requiring manual loop tuning.
LM2590HVT-ADJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-7 Formed Leads
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- Through Hole
- Supplier Device Package:
- TO-220-7
LM2590HVT-ADJ FAQ
1.How can I place an order for LM2590HVT-ADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2590HVT-ADJ 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 LM2590HVT-ADJ reliable?
The price and inventory of LM2590HVT-ADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2590HVT-ADJ is usually 5 days.
3.What payment methods are accepted for LM2590HVT-ADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2590HVT-ADJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2590HVT-ADJ?
LM2590HVT-ADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2590HVT-ADJ 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 LM2590HVT-ADJ?
For technical support, including LM2590HVT-ADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2590HVT-ADJ requirements.
6.How does Aetrix verify that LM2590HVT-ADJ is sourced from the original manufacturer or authorized distributors?
All LM2590HVT-ADJ 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 LM2590HVT-ADJ meets industry standards.
7.What is the process for return or replacement of LM2590HVT-ADJ?
All LM2590HVT-ADJ units undergo pre-shipment inspection (PSI). If there is an issue with LM2590HVT-ADJ, 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 LM2590HVT-ADJ part is unused and in its original packaging.
Return procedure for LM2590HVT-ADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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