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Texas Instruments LM2590HVSX-5.0
- Part No.:
- LM2590HVSX-5.0
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
LM2590HVSX-5.0.pdf
- Description:
- IC REG BUCK 5V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:2,895
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Product details
Overview
LM2590HVSX-5.0 from Texas Instruments is a monolithic 1-A, 150-kHz non-synchronous step-down (buck) DC-DC regulator with fixed 5.0-V output, 4.5–60-V input range, and ±4% output voltage tolerance over line/load/temperature. It integrates internal frequency compensation, thermal shutdown, current limiting, and an out-of-regulation error flag. Used in industrial power supplies requiring robust 5-V rail generation from unregulated high-voltage DC sources.
For engineers reviewing the LM2590HVSX-5.0 datasheet, LM2590HVSX-5.0 pinout, LM2590HVSX-5.0 application, or LM2590HVSX-5.0 equivalent, key selection considerations include its 60-V max input rating, 90-µA standby current in shutdown mode, integrated soft-start via SD/SS pin, programmable error flag delay, and TO-263-7 surface-mount package for thermally demanding applications.
Technical Context
The LM2590HVSX-5.0 implements a fixed-frequency (150 kHz) PWM control architecture with internal oscillator, voltage-mode feedback using a 1.23-V reference, and a single NPN bipolar power switch. Its error amplifier compares feedback voltage against this reference to adjust duty cycle, while the SD/SS pin controls both shutdown (≤0.6 V) and soft-start (capacitor-based ramp).
Functional supervision includes an open-collector FLAG pin that asserts low when output drops below 95% of nominal (e.g., <4.75 V), with delay timing set by an external capacitor on the DELAY pin and controlled by a 3-µA internal current source. Protection features comprise two-stage current limiting (peak 1.9 A typ), thermal shutdown at 150°C, and internal clamping on SD/SS (7 V), FLAG (45 V), and DELAY (1.5 V) pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over –40°C to +125°C, 7–60 V input, 0.2–1 A load - ensures stable logic/system rail without external resistor network. |
| Input Voltage Range | 4.5 V to 60 V - supports wide-range industrial, automotive, and telecom inputs including 24-V and 48-V systems. |
| Switching Frequency | 150 kHz ±15% - enables use of compact 33–68 µH inductors and reduces EMI compared to lower-frequency alternatives. |
| Max Output Current | 1 A DC continuous - sufficient for powering microcontrollers, sensors, and interface ICs directly from high-input rails. |
| Standby Quiescent Current | 90 µA typical at VIN = 60 V - minimizes battery drain or standby power loss in always-on systems. |
| Efficiency | 82% typical at VIN = 12 V, IOUT = 1 A - delivers high conversion efficiency without requiring synchronous rectification. |
| Thermal Resistance | RθJA = 30°C/W (TO-263, 0.5 in² copper) - enables 1-A operation up to +125°C ambient with minimal heatsinking. |
Pinout & Package
LM2590HVSX-5.0 is housed in a 7-pin TO-263 (KTW) surface-mount package with exposed thermal pad, measuring 10.10 mm × 8.89 mm. The package supports high-power dissipation via PCB copper area and is RoHS-compliant.
| 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 switch collector | Drives external catch diode and inductor; swings between ~VIN–0.95 V and –0.5 V during operation. |
| 3 - Flag | Open-collector error indicator | Asserts low (≤0.7 V @ 3 mA sink) when VOUT < 4.75 V; requires external pull-up (e.g., 4.7 kΩ) to logic rail ≤45 V. |
| 4 - Gnd | Power and signal ground | Common return for internal circuitry, feedback, and thermal pad; must be connected to large 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 regulation achieved. |
| 6 - Feedback | Voltage sense input | Internally tied to output for fixed 5-V version; monitors regulated voltage to close control loop with 1.23-V reference. |
| 7 - SD/SS | Shutdown/Soft-start control | Pulled high internally; ≤0.6 V forces shutdown (90 µA IQ); capacitor here provides controlled VOUT ramp rate during startup. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 150-kHz oscillator | Eliminates external timing components and ensures consistent switching frequency across temperature and input voltage. |
| Programmable error flag delay | Enables clean power-good sequencing by delaying FLAG assertion until output stabilizes, preventing false undervoltage triggers. |
| Two-stage current limit protection | First stage limits peak switch current to ~1.9 A; second stage reduces frequency under overload - prevents thermal runaway during short-circuit events. |
| Low-IQ shutdown mode | Reduces system standby power to <100 µA, critical for battery-backed or energy-harvesting applications. |
| Thermal shutdown with hysteresis | Shuts down at 150°C junction temperature and restarts only after cooling by ~20°C - avoids oscillatory behavior near thermal limit. |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Generating a stable 5-V rail from a 24-V vehicle battery or 48-V industrial bus with transient spikes up to 60 V. IC Role / Device Role / Timing Role: Primary buck regulator providing main logic supply; operates continuously with thermal management via TO-263 thermal pad. Use Value: Withstands load dump transients and cold-crank conditions while maintaining ±4% regulation and asserting FLAG if output collapses. | Use Scenario: Powering CAN transceivers, microcontrollers, and sensor interfaces in body electronics where space and reliability are constrained. IC Role / Device Role / Timing Role: Compact, high-input-voltage step-down converter mounted directly on control module PCB; SD/SS pin used for MCU-controlled power sequencing. Use Value: 90-µA shutdown current extends battery life during vehicle sleep mode; FLAG signal enables MCU fault detection and diagnostics. |
| Telecom Remote Radio Unit | Test Equipment Auxiliary Supply |
Use Scenario: Deriving 5-V bias from a 48-V PoE-derived or central office supply in outdoor base station equipment. IC Role / Device Role / Timing Role: Pre-regulator feeding low-noise LDOs; operates at full 1-A load under extended temperature range (–40°C to +125°C). Use Value: 60-V absolute maximum input rating accommodates surge events; RθJA = 20°C/W (with 3 in² copper) sustains full load at high ambient temperatures. | Use Scenario: Providing isolated 5-V supply for DUT interface circuitry in automated test systems with strict power-up timing requirements. IC Role / Device Role / Timing Role: Controlled power source with programmable soft-start and delayed power-good signaling via FLAG/DELAY pins. Use Value: Soft-start capacitor on SD/SS pin eliminates inrush current; DELAY capacitor sets precise power-good assertion window for test sequence synchronization. |
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 electrical specs but in 7-pin TO-220 (NDZ) package; higher RθJA (50°C/W) and no thermal pad; leaded through-hole mounting. | Suitable for prototyping, low-volume assemblies, or legacy designs requiring vertical heatsink mounting. | Select LM2590T-5.0 when manual assembly, mechanical heatsinking, or compatibility with existing TO-220 footprints is required. |
| LM2596SX-5.0 | Lower max input (40 V vs. 60 V); 150-kHz frequency; same 1-A rating but no FLAG or DELAY pins; TO-263-5 package (no dedicated Delay/Flag pins). | Lacks supervisory features - cannot support power-good sequencing or fault reporting in safety-critical systems. | Choose LM2596SX-5.0 only for cost-sensitive, non-supervised 5-V buck applications where input stays ≤40 V. |
Compared with LM2590T-5.0, LM2590HVSX-5.0 offers superior thermal performance and surface-mount compatibility; versus LM2596SX-5.0, it adds critical fault monitoring and higher input voltage capability essential for industrial and automotive deployments.
Availability
LM2590HVSX-5.0 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and telecom infrastructure requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LM2590HVSX-5.0 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 designed specifically for high-input-voltage, medium-current DC-DC conversion in harsh environments - emphasizing ruggedness, integrated protection, and minimal external component count for reliable 1-A buck regulation.
FAQ
What is the maximum input voltage rating for the LM2590HVSX-5.0?
The LM2590HVSX-5.0 has an absolute maximum input voltage rating of 63 V, with recommended operating range from 4.5 V to 60 V. This allows direct use with 24-V, 36-V, and 48-V industrial and automotive supplies, including transient surges common in vehicle electrical systems. Exceeding 63 V risks permanent damage per the Absolute Maximum Ratings table.
Does the LM2590HVSX-5.0 require an external feedback resistor network?
No, the LM2590HVSX-5.0 does not require external feedback resistors because it is the fixed 5.0-V output variant. Pin 6 (Feedback) is internally connected to the output, eliminating the need for a resistor divider. This simplifies design, improves accuracy (±4% guaranteed), and removes drift sources associated with external components - a key advantage over adjustable versions like LM2590HVSX-ADJ.
How is the error flag (FLAG pin) used in system-level monitoring?
The FLAG pin on the LM2590HVSX-5.0 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), indicating undervoltage or fault condition. When pulled high externally (e.g., with 4.7 kΩ to 3.3 V or 5 V), it serves as a "power good" signal. Its timing can be delayed using a capacitor on the DELAY pin to avoid false triggers during startup transients.
Can the LM2590HVSX-5.0 operate at full 1-A load across its entire temperature range?
Yes, the LM2590HVSX-5.0 is specified for 1-A continuous output current from –40°C to +125°C junction temperature. However, sustained 1-A operation at high ambient temperatures requires adequate PCB copper area: with 2.5 in² of 1-oz copper, RθJA is 30°C/W; with 3 in² on one side and 16 in² on the other, it drops to 20°C/W - enabling full-load operation even at +85°C ambient without additional heatsinking.
What is the purpose of the SD/SS pin, and how is soft-start implemented?
Pin 7 (SD/SS) serves dual functions: applying ≤0.6 V places LM2590HVSX-5.0 in shutdown mode (IQ ≈ 90 µA), while connecting a capacitor between SD/SS and ground creates a controlled soft-start. An internal 5-µA (below 1.3 V) / 1.6-µA (above 1.3 V) current source charges the capacitor, ramping the duty cycle from 0% to 100% - preventing inrush current and ensuring monotonic VOUT rise. No external resistor is needed due to internal pull-up.
LM2590HVSX-5.0 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:
- Obsolete
- 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 FAQ
1.How can I place an order for LM2590HVSX-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2590HVSX-5.0 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 reliable?
The price and inventory of LM2590HVSX-5.0 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 is usually 5 days.
3.What payment methods are accepted for LM2590HVSX-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2590HVSX-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2590HVSX-5.0?
LM2590HVSX-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2590HVSX-5.0 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?
For technical support, including LM2590HVSX-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2590HVSX-5.0 requirements.
6.How does Aetrix verify that LM2590HVSX-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2590HVSX-5.0 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 meets industry standards.
7.What is the process for return or replacement of LM2590HVSX-5.0?
All LM2590HVSX-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2590HVSX-5.0, 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 part is unused and in its original packaging.
Return procedure for LM2590HVSX-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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