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Texas Instruments LM2590HVT-5.0/NOPB
- Part No.:
- LM2590HVT-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-7 Formed Leads
- Datasheet:
-
LM2590HVT-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A TO220-7
- Quantity:
- Payment:
- Shipping:
Inventory:3,910
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Product details
Overview
LM2590HVT-5.0/NOPB from Texas Instruments is a monolithic 150-kHz, 1-A non-synchronous step-down (buck) DC-DC switching regulator with fixed 5.0-V output, 4.5–60-V input range, ±4% output voltage tolerance over line and load, and integrated shutdown/soft-start and error flag functions. It delivers stable 5-V power for industrial control modules, automotive subsystems, and embedded power supplies requiring high input voltage resilience.
For engineers reviewing the LM2590HVT-5.0/NOPB datasheet, LM2590HVT-5.0/NOPB pinout, LM2590HVT-5.0/NOPB application, or LM2590HVT-5.0/NOPB equivalent, key selection considerations 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 load, thermal shutdown protection, and compatibility with standard TO-220-7 package layouts.
Technical Context
The LM2590HVT-5.0/NOPB integrates a fixed-frequency 150-kHz oscillator, internal compensation, and a bipolar NPN power switch capable of 1-A continuous output. Its feedback loop is internally connected to generate 5.0 V, eliminating external resistor dividers. The device operates in continuous conduction mode under typical loads and includes two-stage current limiting and thermal shutdown for fault protection.
Control logic centers on the SD/SS pin: ≤0.6 V forces shutdown (90 µA IQ), while ≥2 V enables operation with soft-start via external capacitor; the FLAG pin provides open-collector power-good signaling with programmable delay via CDELAY, and the DELAY pin sources a precise 3-µA current for timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full line/load/temperature range - ensures stable logic supply without trimming. |
| Input Voltage Range | 4.5 V to 60 V - supports wide-input applications including 24-V and 48-V industrial rails and automotive battery transients. |
| Switching Frequency | 150 kHz (±15%) - enables use of compact, low-cost 33–68 µH inductors and reduces EMI filtering burden. |
| Max Output Current | 1 A DC - sufficient for powering microcontrollers, sensors, and interface ICs in space-constrained designs. |
| Standby Quiescent Current | 90 µA typical at VIN = 60 V - minimizes battery drain in always-on systems during shutdown. |
| Switch Saturation Voltage | 0.95–1.3 V at 1 A - defines conduction loss and impacts thermal design; lower VSAT improves efficiency at high load. |
| Thermal Shutdown Threshold | Junction temperature >150 °C - protects against sustained overload or poor heatsinking without external circuitry. |
Pinout & Package
LM2590HVT-5.0/NOPB is supplied in a 7-pin TO-220 package (NDZ variant) with tab-connected VIN for enhanced thermal performance. Pin 1 is VIN, Pin 2 is OUTPUT (switch node), Pin 3 is FLAG (open-collector error flag), Pin 4 is GND, Pin 5 is DELAY (flag delay timing), Pin 6 is FEEDBACK (internally tied to output for fixed 5-V version), and Pin 7 is SD/SS (shutdown/soft-start control).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Positive input supply | Accepts 4.5–60 V unregulated DC; requires ≥330 µF bulk input capacitance and low-ESR ceramic bypass near pin. |
| 2 - OUTPUT | Internal switch collector | Swings between ~VIN–VSAT and –0.5 V; connects to catch diode anode and inductor; PCB copper area critical for thermal management. |
| 3 - FLAG | Open-collector error flag | Pulls low (≤1 V) when VOUT < 95% of 5 V; requires external pull-up (e.g., 4.7 kΩ to VOUT); max 3 mA sink capability. |
| 4 - GND | Circuit ground reference | Common return for feedback, delay, and shutdown paths; must be low-impedance connection to minimize noise coupling. |
| 5 - DELAY | Flag delay timing node | Sources 3 µA current to external capacitor; flag goes high after voltage exceeds 1.25 V - sets power-good assertion delay. |
| 6 - FEEDBACK | Regulation sense input | Internally connected to output for 5-V fixed version; no external divider required - simplifies layout and improves stability. |
| 7 - SD/SS | Shutdown/soft-start control | Drives low (≤0.6 V) for shutdown (90 µA IQ); floating or ≥2 V enables operation; capacitor adds controlled output ramp rate. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 150-kHz oscillator | Eliminates external timing components and ensures consistent switching frequency across temperature and input voltage. |
| Out-of-regulation error flag with delay | Enables system-level power sequencing and fault detection with user-programmable assertion timing via CDELAY. |
| Shutdown/soft-start on single pin | Reduces BOM count and PCB footprint; soft-start capacitor value directly controls output voltage rise time. |
| Two-stage current limit + thermal shutdown | Provides robust fault protection without external sensing - prevents damage during short-circuit or overheating events. |
| ±4% output voltage tolerance | Guaranteed accuracy over –40°C to +125°C, 4.5–60 V input, and 0.2–1 A load - reduces need for post-regulation LDOs. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Powering isolated digital I/O drivers and analog sensor interfaces in DIN-rail mounted controllers operating from 24-V DC bus with load dumps up to 60 V. IC Role / Device Role / Timing Role: Primary 5-V buck regulator supplying MCU core logic, CAN transceivers, and ADC references. Use Value: 60-V input rating withstands automotive-style transients; ±4% output tolerance ensures reliable logic levels across temperature extremes. | Use Scenario: Generating 5-V rail for microcontroller, EEPROM, and LIN transceivers in door module ECUs exposed to cold-crank (4.5 V) and load-dump (60 V) conditions. IC Role / Device Role / Timing Role: Main system regulator with power-good signaling to enable safe firmware boot sequence. Use Value: FLAG pin with DELAY capacitor provides configurable power-good timing to coordinate MCU reset and peripheral initialization. |
| Medical Point-of-Care Monitor | Telecom Remote Radio Unit |
Use Scenario: Providing clean, regulated 5-V supply for touch-screen controller, display backlight driver, and wireless SoC in battery-backed portable diagnostics equipment. IC Role / Device Role / Timing Role: High-efficiency primary converter stepping down from 12-V sealed lead-acid or Li-ion battery pack. Use Value: 90-µA shutdown current extends battery life during standby; thermal shutdown prevents overheating in enclosed enclosures. | Use Scenario: Converting 48-V telecom rectified input to 5-V for FPGA configuration, Ethernet PHY, and clock distribution ICs in outdoor base station radios. IC Role / Device Role / Timing Role: Pre-regulator feeding low-noise LDOs for sensitive RF and timing circuits. Use Value: Fixed 5-V output eliminates feedback resistor errors; 150-kHz switching allows small, shielded inductors compatible with RF isolation requirements. |
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/NOPB | Standard-voltage version (max VIN = 40 V); same pinout, features, and 5-V output but lower input rating. | Suitable only for ≤40-V systems; not rated for automotive load-dump or industrial 48-V transient events. | Select LM2590HVT-5.0/NOPB when input may exceed 40 V; LM2590T-5.0/NOPB offers cost advantage in benign 24-V environments. |
| LM2596HV-5.0 | Higher 3-A output capability; same 60-V input, 150-kHz frequency, and TO-220-5 package (different pin count and function mapping). | Requires PCB redesign due to 5-pin vs. 7-pin layout; lacks FLAG and DELAY pins - no built-in power-good signaling. | Choose LM2590HVT-5.0/NOPB for 1-A designs needing error flag and delay; LM2596HV-5.0 fits higher-current needs where flag functionality is handled externally. |
Compared with LM2590T-5.0/NOPB, LM2590HVT-5.0/NOPB adds 20-V headroom for transient resilience; versus LM2596HV-5.0, it trades current capacity for integrated supervision features and direct 7-pin drop-in compatibility in legacy LM2590HV layouts.
Availability
LM2590HVT-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device power supplies requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for LM2590HVT-5.0/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, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LM2590HV product line was designed as SIMPLE SWITCHER® regulators to simplify high-voltage DC-DC conversion - reducing design time through integrated features, robust protection, and minimal external component count for 1-A buck applications.
FAQ
What is the maximum input voltage rating for LM2590HVT-5.0/NOPB?
The LM2590HVT-5.0/NOPB supports a maximum input voltage of 60 V, verified per Absolute Maximum Ratings in the TI datasheet (SNVS084C). This rating allows operation across harsh environments including automotive load-dump events and industrial 48-V systems. Exceeding 60 V risks permanent damage, and the internal clamp on the SD/SS pin limits applied voltage to 6 V.
Does LM2590HVT-5.0/NOPB require external feedback resistors to set the 5-V output?
No, LM2590HVT-5.0/NOPB does not require external feedback resistors. As a fixed-output variant, the FEEDBACK pin (Pin 6) is internally connected to the OUTPUT pin, establishing the 5.0-V regulation point. This eliminates resistor tolerance errors and simplifies PCB layout - confirmed in the Pin Functions table and Typical Application schematic in the TI datasheet.
How does the FLAG pin on LM2590HVT-5.0/NOPB behave during startup and fault conditions?
The FLAG pin on LM2590HVT-5.0/NOPB is an open-collector output that remains high-impedance until the output reaches regulation. Once VOUT rises to ≥95% of 5 V, and after the DELAY capacitor charges to 1.25 V, FLAG pulls low (≤1 V) to signal "power good." If VOUT drops below 95%, FLAG immediately pulls low - behavior validated in Section 5 (Pin Configuration) and Figure 30 of the TI datasheet.
What thermal performance can be expected from LM2590HVT-5.0/NOPB in a TO-220 package without a heatsink?
In a standard vertical TO-220 mount with 1 in² of 1-oz copper, LM2590HVT-5.0/NOPB has a junction-to-ambient thermal resistance (RθJA) of approximately 50 °C/W. At 1-A load with 12-V input, typical power dissipation is ~0.7 W, resulting in ~35 °C junction rise above ambient - well within the 125 °C max operating temperature. Derating is required above 85 °C ambient, per Thermal Information Table 6.4.
Can LM2590HVT-5.0/NOPB be used in synchronous rectification configurations?
No, LM2590HVT-5.0/NOPB cannot be used in synchronous rectification configurations. It integrates a single NPN bipolar transistor as the main switch and relies on an external Schottky diode (e.g., 1N5824) for freewheeling - confirmed by the Functional Block Diagram and Typical Application schematic. Synchronous operation would require complementary high-side/low-side gate drive signals not provided by this device.
LM2590HVT-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-7 Formed Leads
- 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):
- 5V
- Voltage - Output (Max):
- -
- 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-5.0/NOPB FAQ
1.How can I place an order for LM2590HVT-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2590HVT-5.0/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 LM2590HVT-5.0/NOPB reliable?
The price and inventory of LM2590HVT-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2590HVT-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2590HVT-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2590HVT-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2590HVT-5.0/NOPB?
LM2590HVT-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2590HVT-5.0/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 LM2590HVT-5.0/NOPB?
For technical support, including LM2590HVT-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2590HVT-5.0/NOPB requirements.
6.How does Aetrix verify that LM2590HVT-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2590HVT-5.0/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 LM2590HVT-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2590HVT-5.0/NOPB?
All LM2590HVT-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2590HVT-5.0/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 LM2590HVT-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2590HVT-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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