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Texas Instruments LM2591HVT-5.0/NOPB
- Part No.:
- LM2591HVT-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
LM2591HVT-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,580
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Product details
Overview
LM2591HVT-5.0/NOPB from Texas Instruments is a monolithic 150-kHz nonsynchronous step-down (buck) DC-DC converter delivering up to 1 A output current with fixed 5.0 V output, ±4% tolerance over line and load, input voltage range up to 60 V, and standby quiescent current of 90 μA. It serves as a high-efficiency primary regulator in industrial power supplies and automotive subsystems.
For engineers reviewing the LM2591HVT-5.0/NOPB datasheet, LM2591HVT-5.0/NOPB pinout, LM2591HVT-5.0/NOPB application, or LM2591HVT-5.0/NOPB equivalent, key selection criteria include its 60-V max input rating, thermal shutdown protection, ON/OFF control interface, and compatibility with standard 5-pin TO-220 and DDPAK packages for high-reliability board-level power conversion.
Technical Context
The LM2591HVT-5.0/NOPB integrates a PWM controller, power switch, and internal frequency compensation in a single IC. Its fixed 150-kHz oscillator enables predictable external filter design using standard inductors and electrolytic capacitors, while the internal two-stage current limit and thermal shutdown provide fault resilience without external sensing circuitry.
Operation relies on voltage-mode control with feedback taken directly from the output pin (no external divider), enabling stable regulation across −40°C to +125°C ambient. The ON/OFF pin supports logic-level shutdown with 1.3 V typical threshold and <200 μA standby current draw, making it suitable for battery-backed or energy-conscious systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full line/load/temperature range - ensures consistent downstream logic or analog supply without trimming. |
| Max Input Voltage | 60 V - supports wide-input applications including 24-V and 48-V industrial buses and automotive cold-crank conditions. |
| Output Current | 1 A DC continuous - sufficient for powering microcontrollers, sensors, and interface ICs without external current boosting. |
| Switching Frequency | 150 kHz (±15%) - balances efficiency and component size; enables use of low-cost, high-saturation-current inductors. |
| Standby Current | 90 μA typical - minimizes system-level quiescent drain during sleep or standby modes. |
| Saturation Voltage | 1.2 V max at 1 A - defines conduction loss and impacts minimum dropout behavior under heavy load. |
| Thermal Shutdown | Active at 150°C junction - protects against sustained overload or poor heatsinking without external circuitry. |
Pinout & Package
LM2591HVT-5.0/NOPB is supplied in a 5-pin TO-220 (NDH) package with 14.986 mm × 10.16 mm body size and through-hole mounting. Thermal resistance RθJA is 50°C/W on standard JEDEC 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: +VIN | Input power supply | Accepts 4.5–60 V DC; requires local 470-μF low-ESR aluminum capacitor to handle switching ripple and transient currents. |
| 2: Output | Switch node | Drives external catch diode and inductor; swings between ~(+VIN − 1.2 V) and ~−0.5 V during operation. |
| 3: Ground | Power and signal reference | Must be connected to low-impedance PCB ground plane; separates power and feedback return paths for stability. |
| 4: Feedback | Regulation sense | Internally tied to output for fixed 5.0 V version; not user-configurable - eliminates external resistor network errors. |
| 5: ON/OFF | Enable/disable control | Logic-compatible input: ≤0.6 V = active, ≥2 V = shutdown; 90-μA standby draw enables simple microcontroller GPIO control. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0 V output | Eliminates external feedback resistors - reduces BOM count, layout area, and calibration drift in production. |
| 150-kHz fixed-frequency operation | Enables predictable EMI filtering and simplifies inductor selection versus variable-frequency alternatives. |
| ON/OFF logic control | Supports system-level power sequencing and low-power sleep states without external level-shifting circuitry. |
| Internal thermal shutdown | Prevents latch-up or silicon damage during sustained overload, eliminating need for discrete thermal cutoff. |
| Two-stage current limiting | Provides soft current foldback before hard shutdown - improves reliability during short-circuit transients. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Converting 24-V rail to stable 5-V supply for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated 5-V domain with high line regulation. Use Value: Maintains ±4% output accuracy across 18–36 V input variation and 100-mA to 1-A load steps - avoids brownout resets. |
Use Scenario: Powering CAN transceivers and microcontrollers in door module electronics. IC Role / Device Role / Timing Role: Main DC-DC converter handling cold-crank (6.5 V) to load-dump (60 V) transients. Use Value: Withstands 60-V max input and operates down to 4.5 V - ensures uninterrupted function during vehicle cranking. |
| Point-of-Load Converter | Positive-to-Negative Inverter |
Use Scenario: Generating local 5-V supply on dense PCBs where space limits use of larger modules. IC Role / Device Role / Timing Role: Compact, self-contained buck regulator minimizing external component count. Use Value: Requires only one inductor, one Schottky diode, and two electrolytic capacitors - reduces layout complexity and cost. |
Use Scenario: Creating −5-V rail from +12-V source for op-amp biasing or RS-232 drivers. IC Role / Device Role / Timing Role: Configured as inverting buck-boost regulator using external diodes and feedback re-routing. Use Value: Leverages same 5.0-V fixed-output IC to generate precise negative output - avoids separate inverter IC BOM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2591HV-5.0 | No "T" suffix; identical electrical specs but offered in TO-220 only (no DDPAK variant); same 5-pin footprint and pinout. | Same functional use; differs only in packaging availability - no change to schematic or layout required. | Select LM2591HVT-5.0/NOPB when DDPAK surface-mount option is needed for automated assembly or thermal performance. |
| LM2596-5.0 | Higher 150-kHz frequency (same), but rated for 3-A output; wider input range (4–40 V vs. 4.5–60 V); different pinout and package (TO-220-5). | Not drop-in: requires revised PCB layout, higher-current magnetics, and updated thermal design. | Choose LM2596-5.0 only when >1-A load capability is required - otherwise LM2591HVT-5.0/NOPB offers better 60-V input margin and lower cost. |
Compared with LM2591HV-5.0 and LM2596-5.0, the LM2591HVT-5.0/NOPB uniquely combines 60-V input tolerance, TO-220 and DDPAK packaging options, and fixed 5-V output in a 1-A solution - making it optimal for space-constrained, high-input-voltage industrial and automotive designs where exact 1-A capability suffices.
Availability
LM2591HVT-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and point-of-load power conversion requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2591HVT-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 leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability power conversion ICs.
The LM2591HV series was designed for rugged, low-component-count DC-DC conversion in harsh environments - targeting industrial controls, automotive subsystems, and telecom infrastructure where wide input range and thermal robustness are critical.
FAQ
What is the maximum input voltage rating for LM2591HVT-5.0/NOPB?
The LM2591HVT-5.0/NOPB has an absolute maximum input voltage of 63 V and a recommended operating maximum of 60 V. This allows reliable operation across automotive load-dump events and industrial 48-V bus variations. Exceeding 60 V in normal operation risks violating recommended conditions, though the device will withstand brief transients up to 63 V per absolute ratings.
Does LM2591HVT-5.0/NOPB require external feedback resistors?
No. The LM2591HVT-5.0/NOPB is a fixed 5.0-V output variant - its feedback pin (Pin 4) is internally connected to the output, eliminating the need for external resistive dividers. This simplifies design, improves output accuracy by removing resistor tolerance effects, and reduces PCB area compared to adjustable versions.
What package types are available for LM2591HVT-5.0/NOPB?
The LM2591HVT-5.0/NOPB is offered in the 5-pin TO-220 (NDH) package with 14.986 mm × 10.16 mm body size. Unlike the base LM2591HV-5.0, the "T" suffix denotes availability in both TO-220 and DDPAK/TO-263 packages - enabling selection based on thermal requirements and assembly method (through-hole vs. surface mount).
How does the ON/OFF pin function on LM2591HVT-5.0/NOPB?
The ON/OFF pin (Pin 5) provides logic-level enable control: driving it ≤0.6 V activates regulation, while ≥2 V places LM2591HVT-5.0/NOPB in shutdown mode with 90 μA typical quiescent current. The threshold is typically 1.3 V, and the pin must not exceed 25 V - allowing direct interfacing with MCU GPIOs or open-collector drivers without level shifting.
What protection features are integrated into LM2591HVT-5.0/NOPB?
The LM2591HVT-5.0/NOPB includes thermal shutdown (activates at 150°C junction temperature), two-stage current limiting (peak switch current limit of 1.2–3.0 A), and undervoltage lockout (inherent via startup circuit). These functions operate autonomously without external components - ensuring safe operation during overload, short-circuit, or overheating conditions.
LM2591HVT-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-5 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-220-5
LM2591HVT-5.0/NOPB FAQ
1.How can I place an order for LM2591HVT-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2591HVT-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 LM2591HVT-5.0/NOPB reliable?
The price and inventory of LM2591HVT-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 LM2591HVT-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2591HVT-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2591HVT-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2591HVT-5.0/NOPB?
LM2591HVT-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2591HVT-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 LM2591HVT-5.0/NOPB?
For technical support, including LM2591HVT-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2591HVT-5.0/NOPB requirements.
6.How does Aetrix verify that LM2591HVT-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2591HVT-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 LM2591HVT-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2591HVT-5.0/NOPB?
All LM2591HVT-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2591HVT-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 LM2591HVT-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2591HVT-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2591HVT-5.0/NOPB Tags
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