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Texas Instruments LM2590HVS-3.3
- Part No.:
- LM2590HVS-3.3
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
LM2590HVS-3.3.pdf
- Description:
- IC REG BUCK 3.3V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:4,690
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Product details
Overview
LM2590HVS-3.3 from Texas Instruments is a monolithic 1-A, 150-kHz non-synchronous step-down (buck) DC-DC regulator with fixed 3.3-V output, 4.5–60 V input range, ±4% output voltage tolerance over line/load/temperature, and integrated shutdown/soft-start and error flag functions. It delivers stable power in industrial control modules, automotive body electronics, and distributed power systems requiring high-input-voltage conversion.
For engineers reviewing the LM2590HVS-3.3 datasheet, LM2590HVS-3.3 pinout, LM2590HVS-3.3 application, or LM2590HVS-3.3 equivalent, key selection criteria include its 60-V max input rating, 90 µA standby current in shutdown mode, 1.2–1.3 V switch saturation voltage at 1 A, thermal shutdown protection, and compatibility with standard TO-263-7 surface-mount layouts.
Technical Context
The LM2590HVS-3.3 integrates a fixed-frequency 150-kHz oscillator, internal compensation, and a bipolar NPN output switch with two-stage current limiting. Its feedback loop references a precise 1.23-V internal bandgap, enabling tight regulation without external resistors for the fixed 3.3-V version.
It implements undervoltage lockout via SD/SS pin control, supports programmable soft-start using an external capacitor on Pin 7, and provides a delay-controlled open-collector error flag (Pin 3) that asserts low when output drops below 95% of nominal-critical for system-level power-good sequencing and fault reporting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±4% over –40°C to +125°C, 4.5–60 V input, 0.2–1 A load - ensures stable logic supply under wide input transients. |
| Max Input Voltage | 60 V - supports direct connection to 48-V industrial buses or automotive battery rails with surge margin. |
| Switching Frequency | 150 kHz (±15%) - enables use of compact 33–68 µH inductors and reduces EMI compared to lower-frequency alternatives. |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, FPGAs, and interface ICs without external boost stages. |
| Standby Current | 90 µA typical at VIN = 60 V in shutdown - minimizes quiescent drain in always-on systems like telematics or sensor nodes. |
| Thermal Protection | Internal thermal shutdown - prevents latch-up or damage during overload or poor heatsinking conditions. |
| Efficiency | 77% typical at VIN = 12 V, IOUT = 1 A - balances performance and cost for medium-power applications without requiring synchronous rectification. |
Pinout & Package
LM2590HVS-3.3 is housed in a 7-pin TO-263 (KTW) surface-mount package with exposed thermal pad for enhanced heat dissipation. The package measures 10.10 mm × 8.89 mm and is rated for 20°C/W junction-to-ambient thermal resistance with 3 in² copper on one side and 16 in² on the opposite PCB layer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Positive input supply | Accepts 4.5–60 V unregulated DC; requires ≥330 µF bulk input capacitance to handle switching current peaks and suppress ripple. |
| 2 - Output | Switch node | Drives external catch diode and inductor; swings between ~VIN–VSAT and –0.5 V; must be routed with short, low-inductance traces. |
| 3 - Flag | Open-collector error flag | Asserts low (≤1 V, sink ≤3 mA) when VOUT < 95% of 3.3 V; requires external pull-up resistor (e.g., 4.7 kΩ to VOUT). |
| 4 - GND | Power ground | Primary return path for switch current and control circuitry; must connect directly to thermal pad and low-impedance ground plane. |
| 5 - Delay | Flag delay timing | Charged by 3 µA internal current source; sets power-up delay before Flag goes high - 0.1 µF yields ~43 ms delay (t = 1.3 V / 3 µA·C). |
| 6 - Feedback | Regulation sense | Internally tied to output for fixed 3.3-V version; not user-accessible - eliminates external resistor divider errors and layout sensitivity. |
| 7 - SD/SS | Shutdown/Soft-start control | Pulled high internally; drives low (≤0.6 V) to enter 90 µA standby; capacitor here controls output ramp rate during startup. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated soft-start | Capacitor-programmable output voltage ramp rate on Pin 7 - prevents inrush current and stabilizes upstream supplies. |
| Power-good flag with delay | Open-collector Flag (Pin 3) delayed by external capacitor on Pin 5 - enables reliable sequencing in multi-rail systems. |
| High-input-voltage capability | 60 V absolute maximum input - supports 48-V industrial, 36-V automotive, and PoE+ auxiliary power designs without pre-regulation. |
| Robust protection suite | Two-stage current limit, thermal shutdown, and undervoltage lockout - ensures safe operation under short-circuit, overtemp, and brownout. |
| Low-standby-power shutdown | 90 µA typical IQ in shutdown - extends battery life in always-on monitoring devices and remote sensors. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Powering isolated CAN transceivers, analog input conditioners, and microcontroller peripherals from a 24-V vehicle battery with load dump immunity. IC Role / Device Role / Timing Role: Primary buck regulator converting 24–36 V battery rail to clean 3.3-V logic supply for MCU and communication ICs. Use Value: 60-V input rating withstands ISO 7637-2 pulse 5a (120 V transient); thermal shutdown prevents failure during engine cranking voltage sag. |
Use Scenario: Supplying 3.3-V power to door module microcontrollers and LIN transceivers in environments with wide temperature (-40°C to +125°C) and vibration. IC Role / Device Role / Timing Role: Non-synchronous buck converter delivering regulated 3.3 V with built-in soft-start to avoid reset glitches during ignition-on transitions. Use Value: ±4% output tolerance maintains I/O voltage compliance across temperature; TO-263 package enables automated reflow assembly and robust thermal performance. |
| Telecom Remote Radio Unit | Factory Automation Sensor Hub |
|
Use Scenario: Converting -48 V telecom supply (via inverting pre-regulator) to +3.3 V for FPGA configuration and Ethernet PHYs in outdoor base stations. IC Role / Device Role / Timing Role: Secondary buck stage following an inverting converter; uses Flag signal for system-level power-good assertion to FPGA. Use Value: Delay-adjustable Flag ensures FPGA configuration completes before releasing reset; 150-kHz switching allows small 33 µH inductor footprint. |
Use Scenario: Providing 3.3-V power to MEMS accelerometers, RS-485 transceivers, and low-power MCUs in dust- and moisture-resistant enclosures. IC Role / Device Role / Timing Role: Central point-of-load regulator with shutdown control for energy harvesting sleep/wake cycles. Use Value: 90 µA standby current enables multi-year battery life in wireless sensor nodes; thermal shutdown protects against enclosure overheating. |
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-3.3 | TO-220-7 package; higher RθJA (50°C/W vs. 20°C/W); no exposed thermal pad; identical electrical specs. | Suitable for prototyping or low-volume through-hole assembly; less efficient thermal performance limits sustained 1-A loads in confined spaces. | Select LM2590T-3.3 only when manual soldering or vertical mounting is required; LM2590HVS-3.3 preferred for production SMT and thermal-critical designs. |
| LM2596HV-3.3 | Same 60-V input, but 150-kHz frequency, 3-A rating, larger TO-220/TO-263 packages; higher quiescent current (5 mA active, 240 µA standby). | Over-specified for 1-A needs; better suited for future-proofing or shared design platforms requiring 3-A headroom. | Choose LM2596HV-3.3 only if system requires >1-A margin or shares layout with higher-current variants; LM2590HVS-3.3 offers optimal size/power trade-off at 1 A. |
Compared with LM2590T-3.3, LM2590HVS-3.3 delivers superior thermal management in SMT layouts, while LM2596HV-3.3 trades efficiency and footprint for higher current capacity - making LM2590HVS-3.3 the most balanced choice for space-constrained 1-A industrial and automotive buck applications.
Availability
LM2590HVS-3.3 is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and telecom remote units requiring stable component supply with long-term manufacturability and consistent parametric performance.
Supply support for LM2590HVS-3.3 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 DC-DC conversion.
The LM2590HV series was designed specifically for rugged, high-input-voltage step-down applications in industrial, automotive, and telecom infrastructure - emphasizing ease of use, minimal external components, and robust fault protection.
FAQ
What is the maximum input voltage rating for the LM2590HVS-3.3?
The LM2590HVS-3.3 has an absolute maximum input voltage rating of 63 V, with recommended operation up to 60 V. This allows direct integration into 48-V industrial systems and automotive applications where load dump transients may exceed 40 V. Operation beyond 60 V risks permanent damage and voids warranty compliance per TI's SNVS084C datasheet Absolute Maximum Ratings table.
Does the LM2590HVS-3.3 require external feedback resistors?
No, the LM2590HVS-3.3 does not require external feedback resistors. As a fixed-output variant, its feedback pin (Pin 6) is internally connected to the output, eliminating resistor tolerance errors and layout sensitivity. This simplifies design, improves long-term stability, and reduces bill-of-materials count compared to adjustable regulators like the LM2590HV-ADJ.
How does the Flag pin function on the LM2590HVS-3.3?
The Flag pin (Pin 3) is an open-collector output that pulls low (≤1 V, sink ≤3 mA) when the regulated output falls below 95% of 3.3 V - indicating out-of-regulation. It remains high (via external pull-up) when output is stable. Combined with the Delay pin (Pin 5), it provides programmable power-good timing, enabling safe sequencing in multi-rail systems without additional supervisory ICs.
What thermal performance can be expected from the LM2590HVS-3.3 in a standard PCB layout?
In a standard double-sided PCB layout with 3 in² of 1 oz. copper on the LM2590HVS-3.3 side and ~16 in² on the opposite layer, the LM2590HVS-3.3 achieves a junction-to-ambient thermal resistance (RθJA) of 20°C/W. This allows full 1-A continuous operation at ambient temperatures up to +105°C without forced airflow or external heatsinking, per TI's SNVS084C Thermal Information section.
Can the LM2590HVS-3.3 be used in shutdown mode with ultra-low power consumption?
Yes, the LM2590HVS-3.3 draws only 90 µA typical quiescent current in shutdown mode (SD/SS pin ≤0.6 V), even at 60 V input. This makes it suitable for battery-backed systems such as smart sensors and telematics modules where standby power budget is critical. The device exits shutdown within microseconds when SD/SS rises above 2 V, supporting fast wake-up response.
LM2590HVS-3.3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Packaging:
- Tube
- 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):
- 3.3V
- 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)
LM2590HVS-3.3 FAQ
1.How can I place an order for LM2590HVS-3.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2590HVS-3.3 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 LM2590HVS-3.3 reliable?
The price and inventory of LM2590HVS-3.3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2590HVS-3.3 is usually 5 days.
3.What payment methods are accepted for LM2590HVS-3.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2590HVS-3.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2590HVS-3.3?
LM2590HVS-3.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2590HVS-3.3 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 LM2590HVS-3.3?
For technical support, including LM2590HVS-3.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2590HVS-3.3 requirements.
6.How does Aetrix verify that LM2590HVS-3.3 is sourced from the original manufacturer or authorized distributors?
All LM2590HVS-3.3 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 LM2590HVS-3.3 meets industry standards.
7.What is the process for return or replacement of LM2590HVS-3.3?
All LM2590HVS-3.3 units undergo pre-shipment inspection (PSI). If there is an issue with LM2590HVS-3.3, 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 LM2590HVS-3.3 part is unused and in its original packaging.
Return procedure for LM2590HVS-3.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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