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Texas Instruments LM2591HVS-5.0/NOPB
- Part No.:
- LM2591HVS-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LM2591HVS-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:1,761
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Product details
Overview
LM2591HVS-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 LM2591HVS-5.0/NOPB datasheet, LM2591HVS-5.0/NOPB pinout, LM2591HVS-5.0/NOPB application, or LM2591HVS-5.0/NOPB equivalent, key selection criteria include input voltage headroom (up to 60 V), thermal performance in TO-263 package, ON/OFF control interface compatibility, and fixed-output stability without external feedback resistors.
Technical Context
The LM2591HVS-5.0/NOPB integrates a PWM controller, power switch, and internal frequency compensation in a single IC. Its 150-kHz fixed-frequency oscillator enables compact LC filter design with standard off-the-shelf inductors and capacitors, while the nonsynchronous architecture uses an external Schottky catch diode for efficiency optimization at 5 V output.
It operates in continuous or discontinuous conduction mode depending on load and inductor value, with built-in two-stage current limiting (1.3–2.8 A peak) and thermal shutdown protection. The ON/OFF pin provides logic-level shutdown control with 1.3 V typical threshold and ≤25 V absolute maximum rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% (4.8–5.2 V) across −40°C to +125°C and 0.2–1 A load, eliminating need for external feedback divider. |
| 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 (127–173 kHz over temperature) - enables use of low-cost, standard 47–100 μH inductors with minimal EMI filtering. |
| Output Current | 1 A DC load capability - sufficient for powering microcontrollers, sensors, and analog circuitry without external current boosting. |
| Standby Quiescent Current | 90 μA typical - enables low-power sleep modes in battery-backed systems without significant drain. |
| Saturation Voltage | 0.95–1.2 V at 1 A - defines minimum dropout and impacts efficiency at low VIN; requires careful thermal management in TO-263 package. |
| Oscillator Accuracy | ±15% over temperature - ensures predictable ripple frequency for EMI filter design but not suitable for synchronous clocking. |
Pinout & Package
LM2591HVS-5.0/NOPB is packaged in a 5-pin DDPAK/TO-263 (KTT) surface-mount package with exposed thermal pad (10.18 mm × 8.41 mm nominal body size), optimized for high-power dissipation in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: +VIN | Positive input supply | Accepts 4.5–60 V DC; requires local 470 μF low-ESR aluminum electrolytic bypass capacitor to handle switching current transients. |
| 2: Output | Switch node | Connects to cathode of external Schottky catch diode and inductor; swings between ≈(+VIN − VSAT) and ≈−0.5 V during operation. |
| 3: Ground | Power and signal reference | Must be connected to low-impedance ground plane; ties thermal pad for heat dissipation in KTT package. |
| 4: Feedback | Regulation sense | Internally tied to 5 V output - no external resistor network needed; sensitive to negative spikes if VIN > 40 V and feedforward cap used. |
| 5: ON/OFF | Shutdown control | Drives high (≥2 V) to enter 90 μA standby; floats or pulled low (≤0.6 V) for normal operation; max 25 V absolute rating. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0 V output | Eliminates external feedback resistors and associated layout sensitivity, reducing BOM count and improving long-term regulation stability. |
| 150-kHz fixed-frequency operation | Enables predictable EMI spectrum placement and simplifies input/output filter design using standard off-the-shelf passive components. |
| ON/OFF logic control | Supports system-level power sequencing and low-power sleep states via simple GPIO or open-collector driver without level shifting. |
| Thermal shutdown + current limiting | Provides self-protection under overload, short-circuit, or inadequate heatsinking - avoids catastrophic failure in unattended industrial deployments. |
| Wide 4.5–60 V input range | Accommodates 12 V, 24 V, and 48 V nominal systems with transient ride-through up to ±20 V, reducing need for upstream pre-regulation. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Converting 24 V vehicle battery rail to stable 5 V for MCU, CAN transceivers, and sensor interfaces in harsh environments. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated 5 V domain with transient immunity and thermal robustness. Use Value: Delivers 1 A at 82% efficiency (VIN = 12 V) while surviving load dump events up to 60 V, reducing need for additional TVS or LDO stages. |
Use Scenario: On-board power conversion in door modules, seat controllers, or lighting nodes where space and reliability are critical. IC Role / Device Role / Timing Role: Standalone step-down regulator enabling direct connection to vehicle battery with integrated fault protection. Use Value: Fixed 5 V output eliminates calibration drift; 90 μA standby current extends battery life during vehicle sleep mode. |
| Programmable Logic Controller (PLC) I/O Module | Telecom Remote Radio Unit (RRU) |
|
Use Scenario: Generating 5 V for digital isolators, ADC drivers, and fieldbus interface ICs in DIN-rail mounted PLC backplanes. IC Role / Device Role / Timing Role: Local point-of-load regulator decoupling noisy 24 V industrial bus from sensitive analog/digital circuitry. Use Value: 150-kHz switching allows compact 68 μH inductor and 220 μF output capacitor, fitting tight module height constraints. |
Use Scenario: Providing 5 V bias for RF front-end amplifiers and monitoring circuits in outdoor telecom base stations. IC Role / Device Role / Timing Role: High-input-voltage buck converter operating from −48 V telecom supply (via inverting configuration) or 24 V backup rail. Use Value: Supports positive-to-negative conversion to −5 V with same IC; 60 V max input accommodates rectified AC auxiliary supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596S-5.0/NOPB | Higher 150-kHz frequency (same), but lower 3 A current rating and wider ±4% output tolerance; TO-263-5 package identical. | Designed for higher-current loads; less suitable for thermally constrained 1 A designs due to higher power dissipation at same VIN/VOUT. | Select when >1 A output is required and board layout allows larger thermal footprint. |
| TPS54202DRCT | Synchronous buck with integrated high/low-side MOSFETs; 4.5–28 V input; 2 A output; 500 kHz switching; requires external feedback resistors. | Higher efficiency at light loads due to synchronous rectification; lacks 60 V input capability and fixed 5 V option. | Select for 12 V input systems prioritizing efficiency and small solution size, not for 48 V or automotive transients. |
Compared with LM2591HVS-5.0/NOPB, LM2596S-5.0/NOPB offers higher current but identical package and voltage specs, while TPS54202DRCT trades input voltage range and simplicity for higher efficiency and integration at lower input voltages.
Availability
LM2591HVS-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and telecom infrastructure requiring stable component supply with long lifecycle support and consistent parametric performance.
Supply support for LM2591HVS-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 ICs, with decades of expertise in high-reliability power conversion solutions.
The LM2591HV series was designed specifically for rugged, wide-input-voltage step-down applications in industrial, automotive, and telecom equipment where simplicity, thermal resilience, and transient tolerance are critical.
FAQ
What is the maximum input voltage rating for LM2591HVS-5.0/NOPB?
The LM2591HVS-5.0/NOPB has an absolute maximum input voltage rating of 63 V, with recommended operating range from 4.5 V to 60 V. This makes it suitable for 24 V and 48 V industrial systems and automotive battery applications with load dump transients. Exceeding 60 V in continuous operation risks exceeding thermal limits and triggering protection circuits.
Does LM2591HVS-5.0/NOPB require external feedback resistors?
No, LM2591HVS-5.0/NOPB does not require external feedback resistors because it is a fixed-output version with internal feedback network set to 5.0 V. Pin 4 (Feedback) is internally connected to the output, eliminating resistor tolerance errors and layout sensitivity - a key advantage over adjustable regulators like LM2591HV-ADJ.
What package type is used for LM2591HVS-5.0/NOPB?
LM2591HVS-5.0/NOPB is supplied in the 5-pin DDPAK/TO-263 (KTT) surface-mount package with exposed thermal pad (10.18 mm × 8.41 mm). This package provides superior thermal performance compared to TO-220 and is optimized for automated assembly and high-power density PCB layouts.
How does the ON/OFF pin function on LM2591HVS-5.0/NOPB?
The ON/OFF pin (Pin 5) controls device enable state: driving it ≥2 V places LM2591HVS-5.0/NOPB in shutdown mode with ~90 μA quiescent current; leaving it floating or pulling it ≤0.6 V enables normal operation. The typical threshold is 1.3 V, and the pin must never exceed 25 V to avoid damage.
What is the typical efficiency of LM2591HVS-5.0/NOPB at full load?
LM2591HVS-5.0/NOPB achieves 82% typical efficiency at VIN = 12 V and ILOAD = 1 A, per the official electrical characteristics table. Efficiency varies with input voltage and load - e.g., drops to ~77% at VIN = 24 V due to higher switching and conduction losses - and depends on external component selection (Schottky diode, inductor DCR, capacitor ESR).
LM2591HVS-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- 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:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-5)
LM2591HVS-5.0/NOPB FAQ
1.How can I place an order for LM2591HVS-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2591HVS-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 LM2591HVS-5.0/NOPB reliable?
The price and inventory of LM2591HVS-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 LM2591HVS-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2591HVS-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2591HVS-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2591HVS-5.0/NOPB?
LM2591HVS-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2591HVS-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 LM2591HVS-5.0/NOPB?
For technical support, including LM2591HVS-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2591HVS-5.0/NOPB requirements.
6.How does Aetrix verify that LM2591HVS-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2591HVS-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 LM2591HVS-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2591HVS-5.0/NOPB?
All LM2591HVS-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2591HVS-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 LM2591HVS-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2591HVS-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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