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Texas Instruments LM2593HVT-5.0
- Part No.:
- LM2593HVT-5.0
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-7 Formed Leads
- Datasheet:
-
LM2593HVT-5.0.pdf
- Description:
- IC REG BUCK 5V 2A TO220-7
- Quantity:
- Payment:
- Shipping:
Inventory:3,710
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Product details
Overview
LM2593HVT-5.0 from Texas Instruments is a monolithic 150-kHz non-synchronous step-down DC-DC converter delivering up to 2 A output current with fixed 5.0-V output, ±4% output voltage tolerance over line and load, 4.5–60 V input range, and integrated shutdown/soft-start. It serves as a high-efficiency buck regulator in industrial power supplies and automotive subsystems.
For engineers reviewing the LM2593HVT-5.0 datasheet, LM2593HVT-5.0 pinout, LM2593HVT-5.0 application, or LM2593HVT-5.0 equivalent, key selection criteria include input voltage headroom (up to 60 V), thermal performance in TO-263 package, error flag timing behavior, and compatibility with standard 32–47 µH inductors and 220–330 µF output capacitors.
Technical Context
The LM2593HVT-5.0 implements a fixed-frequency current-mode control architecture with internal 150-kHz oscillator (±15% tolerance), two-stage current limiting, and thermal shutdown. Its feedback loop uses a direct connection from Output to Feedback pin (Pin 6), eliminating external resistive dividers required in adjustable versions.
It operates in continuous conduction mode at full 2-A load with typical efficiency of 81% at VIN = 12 V, and supports programmable power-up delay via external capacitor on Delay pin (Pin 5) and soft-start via capacitor on SD/SS pin (Pin 7). The internal switch exhibits 1.3-V typical saturation voltage at 2 A and 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over –40°C to +125°C, 7 V ≤ VIN ≤ 60 V, 0.2–2 A load - ensures stable rail for microcontrollers and sensors without trimming. |
| Max Input Voltage | 60 V absolute maximum - supports 48-V industrial buses and automotive cold-crank transients. |
| Switching Frequency | 150 kHz (127–173 kHz range) - enables use of compact 32–47 µH shielded inductors and reduces EMI compared to lower-frequency alternatives. |
| Output Current | 2 A DC continuous - sufficient for powering FPGA I/O banks, motor drivers, or multi-rail PMIC front-ends. |
| Quiescent Current | 90 µA typical in shutdown - minimizes battery drain in always-on monitoring systems. |
| Thermal Resistance | 20°C/W junction-to-ambient (TO-263 with 3 in² double-sided copper) - enables 2-A operation without external heatsink at ambient ≤70°C. |
| Error Flag Accuracy | Flag asserts low when VOUT falls below 95% of nominal (≤4.75 V) - provides reliable power-good signaling for system sequencers. |
Pinout & Package
LM2593HVT-5.0 is packaged in a 7-pin TO-263 (KTW) surface-mount package with exposed thermal pad for enhanced heat dissipation. Dimensions: 10.10 mm × 8.89 mm × 4.83 mm. Thermal pad must be soldered to PCB copper area ≥2.5 in² (single-sided) or ≥3 in² (double-sided) for rated performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply | Accepts 4.5–60 V DC; requires ≥470 µF low-ESR input capacitor placed adjacent to minimize switching noise injection. |
| 2 - Output | Internal switch node | Connects to external Schottky diode cathode and inductor; switches between ~VIN–1.3 V and –0.5 V at 150 kHz. |
| 3 - Flag | Open-collector error flag | Sinks ≤3 mA when VOUT < 4.75 V; requires external pull-up (4.7 kΩ to VOUT if ≤45 V, resistive divider if higher). |
| 4 - Ground | Power and signal reference | Must connect directly to thermal pad and low-impedance ground plane; separates power and analog return paths. |
| 5 - Delay | Programmable flag delay | Charged by 3 µA internal current source; 0.1 µF yields ~43 ms delay before Flag goes high after regulation. |
| 6 - Feedback | Regulation sense | Internally tied to Output for fixed 5-V version; no external resistor network needed - 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 here sets soft-start ramp time. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Soft-Start | Capacitor on SD/SS pin (Pin 7) controls output voltage ramp rate - prevents inrush current in battery-powered systems. |
| Out-of-Regulation Flag with Delay | Flag (Pin 3) remains low during startup until regulated output stabilizes, then delays before asserting high - avoids false power-good signals. |
| Two-Stage Current Limit | First stage limits peak switch current to ~3 A; second stage reduces switching frequency under overload - protects MOSFET during short-circuit events. |
| Thermal Shutdown | Activates at 150°C junction temperature and holds device off until cooldown - prevents permanent damage in enclosed enclosures. |
| Low Standby IQ | 90 µA typical shutdown current - extends runtime in energy-harvesting and remote sensor nodes. |
Applications
| Industrial PLC Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Converts 24-V vehicle battery or 48-V industrial bus to clean 5-V rail for MCU, CAN transceivers, and I/O drivers. IC Role / Device Role / Timing Role: Primary buck regulator supplying main logic rail; operates continuously at 150 kHz with minimal external components. Use Value: 60-V input rating withstands load-dump transients; ±4% output tolerance ensures reliable digital logic operation across temperature. |
Use Scenario: Powers infotainment display interface and door module microcontrollers in vehicles with wide input voltage variation. IC Role / Device Role / Timing Role: Fixed-output step-down converter providing isolated 5-V domain; integrates error flag for system-level power sequencing. Use Value: Flag pin enables safe boot sequence coordination; TO-263 thermal pad supports conduction cooling in space-constrained modules. |
| 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 exposed to –40°C to +85°C ambient. IC Role / Device Role / Timing Role: High-reliability buck regulator with thermal shutdown and current limiting - critical for unattended field deployment. Use Value: 125°C max junction temperature and 2-A capability support sustained operation under full RF load; 81% efficiency reduces thermal stress. |
Use Scenario: Provides stable 5-V supply for calibration circuitry and DUT interfaces in benchtop test instruments requiring low-noise, fast transient response. IC Role / Device Role / Timing Role: Pre-regulator feeding linear post-regulators; leverages fixed 5-V output to eliminate feedback resistor errors. Use Value: 150-kHz switching enables small LC filter size; soft-start prevents output overshoot during instrument power-up sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2593HV-5.0 | Same silicon die, identical electrical specs; differs only in packaging - TO-220 (NDZ) vs TO-263 (KTW) - no functional difference. | Requires through-hole assembly and heatsink mounting; less suitable for high-density SMT production. | Select when mechanical mounting constraints favor TO-220 or legacy board compatibility is required. |
| LM2678-5.0 | Higher 2.5-A rating, 260-kHz switching, improved efficiency (85% typ.), but lacks integrated error flag and delay functionality. | Used where higher current or efficiency is prioritized over power-good signaling and startup sequencing. | Choose when system does not require Flag/Delay pins and needs margin for future load growth or lower thermal footprint. |
Compared with LM2593HV-5.0, the TO-220 variant offers identical performance in through-hole format but increases board area and thermal management complexity; compared with LM2678-5.0, LM2593HVT-5.0 trades 0.5-A current headroom and 5% efficiency for integrated supervision features essential in safety-critical or sequenced power systems.
Availability
LM2593HVT-5.0 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and telecom infrastructure requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LM2593HVT-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 technologies, with decades of expertise in high-reliability power conversion ICs.
The LM2593HV family was designed for rugged, high-input-voltage step-down applications in harsh environments - targeting industrial controls, automotive subsystems, and distributed power architectures where simplicity, thermal robustness, and supervisory features are critical.
FAQ
What is the maximum input voltage rating for LM2593HVT-5.0?
The LM2593HVT-5.0 has an absolute maximum input voltage rating of 63 V, with recommended operating range from 7 V to 60 V. This allows reliable operation in 48-V industrial systems and automotive applications subject to load-dump transients. Exceeding 60 V in normal operation risks exceeding thermal limits and reducing long-term reliability, even if within absolute maximum ratings.
Does LM2593HVT-5.0 require external feedback resistors?
No, LM2593HVT-5.0 does not require external feedback resistors. As a fixed 5.0-V output variant, the Feedback pin (Pin 6) is internally connected to the Output pin (Pin 2), eliminating the need for external resistor networks and associated tolerance errors. This simplifies design, improves regulation accuracy, and enhances layout robustness compared to adjustable versions.
How does the Flag pin on LM2593HVT-5.0 behave during startup?
The Flag pin (Pin 3) on LM2593HVT-5.0 remains low until the output reaches ≥95% of 5.0 V (≥4.75 V), then waits for the Delay pin (Pin 5) capacitor to charge to 1.3 V before going high. With a 0.1 µF capacitor on Pin 5, this delay is approximately 43 ms - ensuring power-good assertion only after stable regulation and avoiding premature system enablement.
Can LM2593HVT-5.0 operate without an external diode?
No, LM2593HVT-5.0 requires an external Schottky diode (e.g., 3.3-A, 60-V) connected from Output (Pin 2) to Ground. The internal switch is a single N-channel MOSFET; the diode provides the freewheeling path during switch-off. Omitting it causes catastrophic failure due to inductive kickback and violates the device's operational topology as defined in TI's official application circuits.
What thermal management is required for LM2593HVT-5.0 at full 2-A load?
At 2-A continuous load and 12-V input, LM2593HVT-5.0 dissipates ~1.4 W. With its TO-263 package and 20°C/W junction-to-ambient rating (on double-sided 3-in² copper), junction temperature rises ~28°C above ambient. To maintain TJ ≤125°C, ambient must stay ≤97°C - achievable with standard PCB copper area and no heatsink. For higher ambient or derated reliability, increase copper area or add airflow.
LM2593HVT-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-7 Formed Leads
- 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:
- 2A
- 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
LM2593HVT-5.0 FAQ
1.How can I place an order for LM2593HVT-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2593HVT-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 LM2593HVT-5.0 reliable?
The price and inventory of LM2593HVT-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 LM2593HVT-5.0 is usually 5 days.
3.What payment methods are accepted for LM2593HVT-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2593HVT-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2593HVT-5.0?
LM2593HVT-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2593HVT-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 LM2593HVT-5.0?
For technical support, including LM2593HVT-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2593HVT-5.0 requirements.
6.How does Aetrix verify that LM2593HVT-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2593HVT-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 LM2593HVT-5.0 meets industry standards.
7.What is the process for return or replacement of LM2593HVT-5.0?
All LM2593HVT-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2593HVT-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 LM2593HVT-5.0 part is unused and in its original packaging.
Return procedure for LM2593HVT-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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