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Texas Instruments LM2591HVS-5.0
- Part No.:
- LM2591HVS-5.0
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LM2591HVS-5.0.pdf
- Description:
- IC REG BUCK 5V 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:1,948
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Product details
Overview
LM2591HVS-5.0 from Texas Instruments is a monolithic nonsynchronous step-down (buck) DC-DC switching regulator delivering 1-A output current with fixed 5.0-V output, 150-kHz internal oscillator, input voltage range up to 60 V, and ±4% output voltage tolerance over line and load. It operates in automotive and industrial power supplies where high-input-voltage buck conversion is required without external controller complexity.
For engineers reviewing the LM2591HVS-5.0 datasheet, LM2591HVS-5.0 pinout, LM2591HVS-5.0 application, or LM2591HVS-5.0 equivalent, key selection criteria include its 60-V max input rating, ON/OFF control interface, thermal shutdown protection, 90-μA standby current, and compatibility with standard 5-pin TO-220 or DDPAK packages for through-hole or surface-mount implementation.
Technical Context
The LM2591HVS-5.0 integrates a PWM controller, power switch, and internal frequency compensation in a single IC. Its fixed 150-kHz oscillator enables predictable 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.
Control logic includes active-low ON/OFF pin enabling shutdown with 90-μA quiescent current, and feedback sensing referenced to internal 1.23-V bandgap. Protection features comprise thermal shutdown, two-stage current limiting (1.3–2.8 A peak), and absolute maximum ratings validated for −40°C to +125°C operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full line/load/temperature range - ensures stable rail for microcontrollers and analog circuitry without external resistor network. |
| Input Voltage Range | 4.5 V to 60 V - supports wide-range industrial inputs including 24-V, 36-V, and 48-V bus systems with margin for transients. |
| Output Current | 1 A DC continuous - sufficient for powering FPGA I/O banks, sensor signal chains, or isolated gate drivers without derating. |
| Switching Frequency | 150 kHz (±15%) - balances EMI performance and passive size; enables use of low-cost 47–100 μH shielded inductors. |
| Efficiency | 82% typical at VIN = 12 V, IOUT = 1 A - reduces thermal load in enclosed enclosures and extends battery runtime in portable 24-V systems. |
| Standby Current | 90 μA typical - enables low-power sleep modes in always-on monitoring systems without compromising wake-up latency. |
| Saturation Voltage | 1.2 V max at 1 A - defines minimum dropout headroom; requires ≥6.2 V input to sustain 5-V output under full load. |
Pinout & Package
LM2591HVS-5.0 is available in 5-pin TO-220 (NDH) and 5-pin DDPAK/TO-263 (KTT) packages. Both share identical pin numbering and functional assignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: +VIN | Power Input | Accepts 4.5–60 V DC; requires local 470-μF low-ESR aluminum electrolytic bypass capacitor to handle high di/dt switching currents. |
| 2: Output | Switch Node | Drives external catch diode and LC filter; swings between ~(+VIN − 1.2 V) and ~−0.5 V; layout must minimize loop area for EMI control. |
| 3: Ground | Power & Signal Reference | Common return for input cap, output cap, feedback network, and ON/OFF pull-down; must connect to low-impedance ground plane. |
| 4: Feedback | Voltage Sense Input | Internally tied to 5-V output; monitors regulation error; sensitive to noise-requires short trace and optional Schottky clamp if VIN > 40 V. |
| 5: ON/OFF | Digital Control Input | Active-low enable: ≤0.6 V = ON, ≥2 V = OFF; threshold is 1.3 V typical; max 25-V rating mandates series resistor if driven from >25-V source. |
Key Features
| Feature | Design Value |
|---|---|
| Wide Input Range (4.5–60 V) | Enables direct connection to unregulated 24-V/36-V/48-V industrial buses without pre-regulation, reducing BOM count and board space. |
| Integrated Thermal Shutdown | Automatically disables switching when junction temperature exceeds 150°C, preventing permanent damage during overload or poor heatsinking. |
| Two-Stage Current Limit | First stage limits peak switch current to 1.3–2.8 A; second stage reduces frequency under overload-provides graceful foldback instead of hard latch-off. |
| ON/OFF Pin with Low IQ | Supports system-level power sequencing and standby modes; draws only 90 μA in shutdown, critical for battery-backed remote sensors. |
| Fixed-Frequency Oscillator | 150-kHz operation simplifies EMI filtering and avoids audible noise; eliminates need for external timing components or synchronization signals. |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Converts 24-V vehicle battery or 36-V factory bus to clean 5-V rail for MCU, CAN transceivers, and digital I/O. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated 5-V supply; handles cold-crank (6-V) to load-dump (60-V) transients per ISO 16750-2. Use Value: Eliminates need for external supervisor or discrete MOSFET driver; ±4% output tolerance maintains ADC reference accuracy across temperature. |
Use Scenario: Powers microcontroller and peripheral logic in body electronics modules exposed to harsh automotive environments. IC Role / Device Role / Timing Role: Nonsynchronous buck converter with integrated switch; operates from 9–16-V nominal battery with 60-V surge capability. Use Value: 90-μA standby current enables <100-μA system sleep current; thermal shutdown prevents failure during under-hood overheating. |
| Telecom Remote Radio Unit | Test Equipment Auxiliary Supply |
|
Use Scenario: Generates 5-V bias for RF front-end ICs and ADCs in outdoor base station radios powered from 48-V PoE or DC plant. IC Role / Device Role / Timing Role: High-input-voltage step-down regulator; interfaces with external Schottky diode and 68-μH inductor per TI reference design. Use Value: 150-kHz fixed frequency allows deterministic EMI filter design; 1-A output supports dual-channel RF signal conditioning circuits. |
Use Scenario: Provides isolated 5-V supply for DUT interface logic in automated test equipment operating from variable lab supplies. IC Role / Device Role / Timing Role: Standalone buck regulator with ON/OFF control for sequenced power-up of instrument subsystems. Use Value: ON/OFF pin enables firmware-controlled power gating; ±4% output stability ensures consistent logic thresholds across ambient temperature swings. |
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 | Lower max input (40 V vs. 60 V); same 1-A rating, 150-kHz freq, TO-220 package; no ON/OFF pin. | Lacks shutdown control and 60-V surge handling; unsuitable for 48-V telecom or load-dump automotive use. | Select LM2591HVS-5.0 when input may exceed 40 V or ON/OFF sequencing is required. |
| MP2451DT-LF-Z | Higher frequency (300 kHz), smaller 8-pin SOIC package, 0.6-A rating, integrated diode, no thermal shutdown. | Requires smaller passives but limited to lower current; lacks fault protection for industrial overloads. | Choose LM2591HVS-5.0 for robust 1-A operation with thermal/current protection in demanding environments. |
Compared with LM2596S-5.0 and MP2451DT-LF-Z, LM2591HVS-5.0 uniquely combines 60-V input tolerance, 1-A output, ON/OFF control, and comprehensive protection-making it the only option among the three qualified for automotive load-dump and industrial 48-V bus applications.
Availability
LM2591HVS-5.0 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and telecom remote radio units requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM2591HVS-5.0 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 family was designed for rugged, high-input-voltage DC-DC conversion in industrial, automotive, and telecom infrastructure-emphasizing simplicity, thermal robustness, and minimal external component count.
FAQ
What is the maximum input voltage rating for LM2591HVS-5.0?
The LM2591HVS-5.0 has an absolute maximum input voltage rating of 63 V, with recommended operation up to 60 V. This allows reliable use in 48-V systems with margin for transient surges such as ISO 16750-2 load dump events. Operation above 60 V risks permanent damage and voids warranty compliance.
Does LM2591HVS-5.0 require an external catch diode?
Yes, LM2591HVS-5.0 requires an external Schottky catch diode connected between the Output pin and Ground. The datasheet specifies a 2-A, 60-V Schottky rectifier (e.g., 21DQ06) for optimal efficiency and reliability. Omitting this diode will cause catastrophic failure due to inductive kickback at the switch node.
Can LM2591HVS-5.0 be used in a negative-output configuration?
Yes, LM2591HVS-5.0 can generate a negative output (e.g., −5 V) using the inverting buck-boost topology shown in Figure 25 of the datasheet. This requires reconfiguring Ground and Feedback connections and adding isolation diodes. Peak switch current must be verified against the 1.2–2.8 A current limit to avoid power limiting.
What is the purpose of the ON/OFF pin on LM2591HVS-5.0?
The ON/OFF pin provides digital enable/disable control for LM2591HVS-5.0: pulling it ≤0.6 V enables regulation; driving it ≥2 V places LM2591HVS-5.0 in shutdown mode with 90-μA quiescent current. It is not a synchronous enable-it directly gates the internal oscillator and power switch.
How does thermal performance differ between TO-220 and DDPAK packages for LM2591HVS-5.0?
Both TO-220 (NDH) and DDPAK/TO-263 (KTT) packages for LM2591HVS-5.0 have identical RθJA of 50°C/W on JEDEC 4-layer boards. However, the KTT package offers lower RθJC(top) (2°C/W vs. TO-220's unspecified top resistance), enabling more effective heatsink attachment to the exposed pad for higher ambient temperature operation.
LM2591HVS-5.0 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:
- 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):
- 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 FAQ
1.How can I place an order for LM2591HVS-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2591HVS-5.0 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 reliable?
The price and inventory of LM2591HVS-5.0 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 is usually 5 days.
3.What payment methods are accepted for LM2591HVS-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2591HVS-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2591HVS-5.0?
LM2591HVS-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2591HVS-5.0 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?
For technical support, including LM2591HVS-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2591HVS-5.0 requirements.
6.How does Aetrix verify that LM2591HVS-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2591HVS-5.0 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 meets industry standards.
7.What is the process for return or replacement of LM2591HVS-5.0?
All LM2591HVS-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2591HVS-5.0, 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 part is unused and in its original packaging.
Return procedure for LM2591HVS-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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