My Inquiry
My Account
Texas Instruments LM2590HVS-3.3/NOPB
- Part No.:
- LM2590HVS-3.3/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
LM2590HVS-3.3/NOPB.pdf
- Description:
- IC REG BUCK 3.3V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:1,867
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2590HVS-3.3/NOPB from Texas Instruments is a monolithic 1-A, 150-kHz non-synchronous step-down (buck) DC-DC converter with fixed 3.3-V output, 4.5–60 V input range, and integrated shutdown/soft-start and error flag functions. It delivers ±4% output voltage accuracy over line/load/temperature and operates in TO-263-7 package for industrial power rails requiring robust regulation under wide-input conditions.
For engineers reviewing the LM2590HVS-3.3/NOPB datasheet, LM2590HVS-3.3/NOPB pinout, LM2590HVS-3.3/NOPB application, or LM2590HVS-3.3/NOPB equivalent, key selection criteria include input voltage headroom up to 60 V, thermal shutdown protection, 90 µA standby current, and programmable flag delay for power-good sequencing in embedded power supplies.
Technical Context
The LM2590HVS-3.3/NOPB integrates a fixed-frequency 150-kHz oscillator, internal compensation, and a high-side NPN switch with 0.95 V typical saturation voltage at 1 A. Its feedback loop references a 1.23 V internal bandgap, with the 3.3-V version internally connecting Feedback (Pin 6) directly to Output (Pin 2), eliminating external resistor networks.
It implements dual-stage current limiting (peak limit ≥1.2 A, foldback active under overload), thermal shutdown at 150°C, and undervoltage lockout via SD/SS pin control. The Error Flag (Pin 3) provides open-collector power-good signaling with 1.25 V delay threshold and 3 mA sink capability, while Delay (Pin 5) enables adjustable startup timing via external capacitor.
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 rail without trimming. |
| Switching Frequency | 150 kHz (±15%) - enables use of compact 33 µH inductors and reduces EMI filtering burden vs. lower-frequency buck converters. |
| Max Output Current | 1 A DC continuous - supports single-rail microcontroller, FPGA I/O, or sensor subsystems without external current boosting. |
| Quiescent Current | 90 µA typical in shutdown - preserves battery life in always-on monitoring systems with remote wake-up capability. |
| Input Voltage Range | 4.5 V to 60 V - accommodates 12 V, 24 V, and 48 V industrial buses, automotive cold-crank transients, and unregulated AC/DC outputs. |
| Thermal Protection | Junction shutdown at 150°C with automatic recovery - prevents permanent damage during sustained overload or poor heatsinking. |
| Efficiency | 77% typical at 12 VIN/3.3 VOUT/1 A - minimizes thermal dissipation in enclosed enclosures without forced airflow. |
Pinout & Package
LM2590HVS-3.3/NOPB uses the KTW (TO-263-7) thermally enhanced surface-mount package (10.10 mm × 8.89 mm), with the exposed tab electrically connected to Pin 4 (GND) for low-thermal-resistance PCB mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Positive input supply | Accepts 4.5–60 V unregulated DC; requires ≥330 µF low-ESR input capacitor to handle 1-A switching current transients. |
| 2 - Output | Internal switch collector | Drives external catch diode and inductor; swings between ~VIN–0.95 V and –0.5 V; connects directly to Feedback for fixed 3.3-V operation. |
| 3 - Flag | Open-collector error flag | Sinks ≤3 mA when output drops below 95% of 3.3 V; pulled high externally (e.g., 4.7 kΩ to 3.3 V) to signal "power good" after delay. |
| 4 - GND | Circuit ground reference | Common return for all internal circuits and thermal pad; must be soldered to ≥2.5 in² copper area for RθJA = 30°C/W. |
| 5 - Delay | Flag timing control | Charged by 3 µA internal current source; flag goes high when voltage exceeds 1.25 V - sets power-up delay via CDELAY (e.g., 0.1 µF ≈ 40 ms). |
| 6 - Feedback | Voltage sense input | Internally tied to Output (Pin 2) for 3.3-V version; no external divider needed - simplifies layout and improves regulation accuracy. |
| 7 - SD/SS | Shutdown/Soft-start control | Drives low (≤0.6 V) to enter 90 µA standby; floats or rises >2 V to enable; capacitor here controls soft-start ramp rate. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3-V output | Eliminates external feedback resistors - reduces BOM count, layout area, and potential drift from resistor tolerance/temperature. |
| Integrated error flag with delay | Enables reliable power-good assertion only after output stabilizes - prevents premature system boot in noisy or slow-ramping supplies. |
| 150-kHz fixed-frequency operation | Allows predictable EMI filtering and consistent inductor sizing - avoids frequency jitter issues seen in variable-frequency controllers. |
| Thermal shutdown + current limiting | Provides autonomous fault recovery without external circuitry - protects against short-circuit, overtemperature, and excessive load conditions. |
| TO-263-7 package | Offers 30°C/W junction-to-ambient thermal resistance with 2.5 in² copper - enables 1-A operation without heatsink in space-constrained designs. |
Applications
| Industrial PLC I/O Power | Automotive Body Control Module |
|---|---|
Use Scenario: Powers 3.3-V digital isolators and CAN transceivers in DIN-rail mounted programmable logic controllers with 24 V DC input. IC Role / Device Role / Timing Role: Primary buck regulator delivering clean, regulated 3.3 V from noisy 24 V bus; Flag pin sequences FPGA configuration after stable power-up. Use Value: ±4% output accuracy maintains logic-level compatibility across temperature; 60 V max input withstands load-dump transients per ISO 7637-2. | Use Scenario: Supplies 3.3-V microcontroller core and LIN transceiver in door module electronics powered from vehicle battery (9–16 V nominal, up to 40 V during cranking). IC Role / Device Role / Timing Role: Non-isolated step-down converter with shutdown control synchronized to ignition state; SD/SS pin disables regulator when ignition is off. Use Value: 90 µA standby current extends battery life during parking; thermal shutdown prevents latch-up in sealed enclosures. |
| Medical Sensor Hub | Telecom Remote Radio Unit |
Use Scenario: Generates 3.3-V bias for analog front-end ADCs and low-power BLE SoCs in portable patient monitors with 12 V wall adapter input. IC Role / Device Role / Timing Role: High-efficiency (>77%) primary regulator; Delay pin configures 100-ms power-good window before enabling data acquisition chain. Use Value: 150-kHz switching allows small 33 µH inductor and 220 µF output cap - meets size constraints in handheld form factor. | Use Scenario: Provides 3.3-V auxiliary rail for FPGAs and SerDes in outdoor macrocell radios powered from 48 V DC plant supply. IC Role / Device Role / Timing Role: Pre-regulator stepping 48 V down to 3.3 V; Flag pin feeds watchdog timer to detect brownout before baseband processor resets. Use Value: 60 V absolute max input rating handles telecom surge standards (IEC 61000-4-5); TO-263 thermal performance sustains 1 A at +85°C ambient. |
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/NOPB | TO-220-7 package; higher RθJA (50°C/W) without heatsink; identical electrical specs. | Better suited for prototyping or low-volume through-hole assembly; requires heatsink for full 1-A load at elevated ambient. | Select when manual soldering or mechanical mounting constraints favor through-hole over surface-mount. |
| LM2596HV-3.3 | Same 3.3-V fixed output, but 150-kHz frequency and TO-220/TO-263 packages; slightly lower efficiency (75% typ) and no flag/delay pins. | Lacks power-good signaling and programmable delay - unsuitable where sequenced power-up is required. | Choose only if error flag functionality is unnecessary and cost is prioritized over supervision features. |
Compared with LM2590T-3.3/NOPB, LM2590HVS-3.3/NOPB offers superior thermal performance in surface-mount layouts, while LM2596HV-3.3 trades supervision capability for lower unit cost - making LM2590HVS-3.3/NOPB optimal for production designs needing reliability, sequencing, and thermal margin.
Availability
LM2590HVS-3.3/NOPB is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, medical instrumentation, and telecom infrastructure requiring stable component supply with long-term manufacturability.
Supply support for LM2590HVS-3.3/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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management ICs for industrial, automotive, and communications markets.
The LM2590HV product line was designed for rugged, high-input-voltage DC-DC conversion in harsh environments - targeting applications where input transients, wide temperature ranges, and autonomous fault protection are critical.
FAQ
What is the maximum input voltage rating for LM2590HVS-3.3/NOPB?
The LM2590HVS-3.3/NOPB has an absolute maximum input voltage rating of 63 V, with recommended operating range from 4.5 V to 60 V. This allows safe operation across 12 V, 24 V, and 48 V industrial and automotive power buses, including transient events like load dump. Exceeding 60 V continuously may trigger internal protection or reduce lifetime reliability.
Does LM2590HVS-3.3/NOPB require external feedback resistors?
No, LM2590HVS-3.3/NOPB does not require external feedback resistors. As a fixed 3.3-V output variant, its Feedback (Pin 6) is internally connected to the Output (Pin 2), establishing regulation at precisely 3.3 V without external components - simplifying design, reducing BOM cost, and improving accuracy versus resistor-based adjustable versions.
How is the error flag (Flag pin) used in LM2590HVS-3.3/NOPB?
The Flag pin (Pin 3) on LM2590HVS-3.3/NOPB is an open-collector output that pulls low (<1 V, ≤3 mA sink) when the 3.3-V output falls below 95% of nominal. With an external pull-up resistor (e.g., 4.7 kΩ to 3.3 V), it signals "power good" after a user-programmable delay set by the capacitor on Pin 5 - enabling reliable system reset and sequencing in microcontroller-based designs.
What thermal performance can be expected from LM2590HVS-3.3/NOPB in TO-263 package?
When mounted with the exposed thermal pad soldered to ≥2.5 in² of 1 oz. copper on a single-sided PCB, LM2590HVS-3.3/NOPB achieves a junction-to-ambient thermal resistance (RθJA) of 30°C/W. This allows continuous 1-A operation at +85°C ambient without a heatsink - significantly better than the TO-220 version's 50°C/W, making it ideal for compact, convection-cooled industrial modules.
Can LM2590HVS-3.3/NOPB be used in automotive applications?
Yes, LM2590HVS-3.3/NOPB is suitable for automotive body electronics such as door modules and lighting controllers. Its 4.5–60 V input range covers cold-crank (down to 4.5 V) and load-dump (up to 60 V) conditions per ISO 7637-2, and its –40°C to +125°C operating junction temperature supports under-hood and cabin environments. The integrated thermal shutdown and current limiting provide robust fault protection.
LM2590HVS-3.3/NOPB 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:
- 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):
- 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/NOPB FAQ
1.How can I place an order for LM2590HVS-3.3/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2590HVS-3.3/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 LM2590HVS-3.3/NOPB reliable?
The price and inventory of LM2590HVS-3.3/NOPB 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/NOPB is usually 5 days.
3.What payment methods are accepted for LM2590HVS-3.3/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2590HVS-3.3/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2590HVS-3.3/NOPB?
LM2590HVS-3.3/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2590HVS-3.3/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 LM2590HVS-3.3/NOPB?
For technical support, including LM2590HVS-3.3/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2590HVS-3.3/NOPB requirements.
6.How does Aetrix verify that LM2590HVS-3.3/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2590HVS-3.3/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 LM2590HVS-3.3/NOPB meets industry standards.
7.What is the process for return or replacement of LM2590HVS-3.3/NOPB?
All LM2590HVS-3.3/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2590HVS-3.3/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 LM2590HVS-3.3/NOPB part is unused and in its original packaging.
Return procedure for LM2590HVS-3.3/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2590HVS-3.3/NOPB Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
