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Texas Instruments LM2593HVSX-5.0
- Part No.:
- LM2593HVSX-5.0
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
LM2593HVSX-5.0.pdf
- Description:
- IC REG BUCK 5V 2A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:2,987
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Product details
Overview
LM2593HVSX-5.0 from Texas Instruments is a monolithic 150-kHz non-synchronous step-down DC-DC regulator 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 converter in industrial power supplies requiring stable 5-V rails from wide-input sources.
For engineers reviewing the LM2593HVSX-5.0 datasheet, LM2593HVSX-5.0 pinout, LM2593HVSX-5.0 application, or LM2593HVSX-5.0 equivalent, key selection criteria include its 2-A load capability, 60-V max input, TO-263-7 package thermal performance, error flag signaling, and soft-start control via external capacitor - all critical for rugged off-line and battery-fed systems.
Technical Context
The LM2593HVSX-5.0 integrates a fixed-frequency 150-kHz oscillator, internal compensation, and a bipolar NPN switch with 1.3-V typical saturation voltage at 2 A. Its feedback loop references an internal 1.23-V bandgap, with the 5.0-V version internally connecting Feedback (Pin 6) directly to Output (Pin 2), eliminating external resistor networks.
It implements dual-stage current limiting and thermal shutdown for fault protection, plus an open-collector Flag (Pin 3) that asserts low ≤1 V when output drops below 95% of nominal, with programmable delay via external capacitor on Delay (Pin 5). Shutdown/Soft-start (Pin 7) enables <90-μA standby current and controlled output ramp-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V ±4% over full line (4.5–60 V), load (0.2–2 A), and temperature (–40°C to +125°C) - ensures stable logic supply without trimming. |
| Max Input Voltage | 60 V - supports 48-V industrial buses, automotive cold-crank, and unregulated AC/DC front-ends. |
| Output Current | 2 A continuous - drives multiple downstream ICs or small subsystems without external boost stages. |
| Switching Frequency | 150 kHz (±15%) - enables use of compact 33–47 µH inductors and standard electrolytic output capacitors. |
| Quiescent Current | 90 µA typical in shutdown - minimizes standby power loss in always-on monitoring circuits. |
| Efficiency | 81% typical at VIN = 12 V, IOUT = 2 A - reduces thermal load vs. linear regulators in medium-power applications. |
| Thermal Resistance | RθJA = 30°C/W (TO-263, 0.5 in² copper) - enables 2-A operation without heatsink under moderate ambient conditions. |
Pinout & Package
LM2593HVSX-5.0 is housed in a 7-pin TO-263 (KTW) surface-mount package with exposed thermal pad (10.10 mm × 8.89 mm body size), optimized for PCB heat dissipation via soldered tab.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply | Accepts 4.5–60 V DC; requires local 470-µF low-ESR input capacitor to handle switching current transients. |
| 2 - Output | Switch node | Drives external diode and inductor; swings between ~VIN–1.3 V and –0.5 V; connects internally to Feedback for 5-V fixed version. |
| 3 - Flag | Error flag output | Open-collector signal active low ≤1 V when VOUT < 4.75 V; sinks up to 3 mA; requires external pull-up to ≤45 V. |
| 4 - Ground | Power ground | Common return for input/output paths and IC bias; must be low-impedance connection to thermal pad. |
| 5 - Delay | Flag delay timing | Internal 3-µA current source charges external capacitor; 1.3-V threshold sets power-good assertion delay after regulation. |
| 6 - Feedback | Voltage sense | Internally tied to Output (Pin 2) for fixed 5-V operation; no external resistors required. |
| 7 - SD/SS | Shutdown/Soft-start | Drives low ≤0.6 V for 90-µA shutdown; floats or ≥2 V for normal operation; capacitor here controls output ramp rate. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated soft-start | Controlled output voltage ramp via external capacitor on SD/SS pin - prevents inrush current in sensitive loads. |
| Power-good flag with delay | Open-collector Flag pin asserts only after regulated output stabilizes, with user-programmable delay - enables sequenced system startup. |
| Wide-input 60-V rating | Supports direct connection to 48-V telecom, industrial, and automotive battery systems without pre-regulation. |
| Thermal & current protection | Two-stage current limit and thermal shutdown prevent damage during overload or poor heatsinking - enhances field reliability. |
| Low shutdown IQ | 90-µA typical standby current - extends battery life in portable or energy-harvesting applications with intermittent operation. |
Applications
| Industrial Power Supply | Automotive Control Unit |
|---|---|
Use Scenario: Converting 24-V or 48-V rail to stable 5-V for microcontrollers, sensors, and CAN transceivers in factory automation panels. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated 5-V domain with error flag signaling for system health monitoring. Use Value: Eliminates need for external pre-regulator stages while maintaining ±4% output accuracy across wide input transients and load steps. |
Use Scenario: Powering engine control module (ECM) subcircuits during cold-crank (down to 4.5 V) and load-dump (up to 60 V) events. IC Role / Device Role / Timing Role: Robust 5-V supply IC with built-in undervoltage lockout and thermal protection - ensures deterministic reset behavior. Use Value: Withstands automotive ISO 7637-2 pulse 5a (load dump) without external TVS, reducing BOM count and board area. |
| Telecom Remote Radio Unit | Test & Measurement Equipment |
Use Scenario: Generating clean 5-V bias for RF amplifiers and ADCs in outdoor base station radios powered from -48-V DC plant. IC Role / Device Role / Timing Role: High-efficiency step-down converter operating from inverted -48-V supply (via external inverting stage) to deliver low-noise 5-V rail. Use Value: 150-kHz fixed frequency simplifies EMI filtering; 81% efficiency at 2 A minimizes thermal stress in sealed enclosures. |
Use Scenario: Providing calibrated 5-V reference supply for precision analog front-ends in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Fixed-output regulator with ±4% tolerance and soft-start - ensures repeatable power-on settling for measurement accuracy. Use Value: Flag output signals valid 5-V rail to host MCU, enabling synchronized initialization of analog acquisition chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2593HVSX-3.3 | Fixed 3.3-V output; identical pinout, package, and electrical specs except output voltage and efficiency curve. | Used where 3.3-V logic or FPGA core supply is required instead of 5-V; same layout reuse possible. | Select when target system uses 3.3-V I/O or core voltage; no changes to PCB or external components needed beyond output capacitor re-rating. |
| LM2596SX-5.0 | Same 5-V fixed output but lower 40-V max input, 3.0-A rating, and 150-kHz frequency; TO-263-5 package (no Flag/Delay pins). | Lacks error flag and programmable delay; suited for cost-sensitive, non-safety-critical applications without power sequencing. | Choose for simpler designs where flag signaling and precise startup timing are unnecessary; verify input voltage stays ≤40 V. |
Compared with LM2593HVSX-5.0, the LM2593HVSX-3.3 offers identical robustness and features at a different output voltage, while the LM2596SX-5.0 trades supervision functionality and input voltage headroom for higher current and lower cost - guiding selection based on system-level sequencing and fault-monitoring requirements.
Availability
LM2593HVSX-5.0 is available at Aetrix Electronics and suitable for industrial power supplies, automotive control units, telecom remote radio units, and test & measurement equipment requiring stable component supply with long-term manufacturability.
Supply support for LM2593HVSX-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 company specializing in analog and embedded processing technologies, with leadership in power management ICs since the 1980s.
The LM2593HV series was designed as part of TI's SIMPLE SWITCHER® portfolio to simplify high-voltage buck conversion for industrial, automotive, and telecom applications - emphasizing ease-of-use, minimal external components, and rugged fault protection.
FAQ
What is the maximum input voltage rating for LM2593HVSX-5.0?
The LM2593HVSX-5.0 has an absolute maximum input voltage rating of 63 V, with recommended operation up to 60 V. This allows direct interface with 48-V industrial buses and automotive systems experiencing load dump transients. Exceeding 60 V continuously may reduce reliability or trigger internal protection circuits, so design margin should be maintained per TI's recommended operating conditions.
Does LM2593HVSX-5.0 require external feedback resistors?
No, the LM2593HVSX-5.0 is a fixed-output variant with internal feedback connection between Pin 6 (Feedback) and Pin 2 (Output), eliminating the need for external resistor dividers. This simplifies layout, improves accuracy by removing resistor tolerance errors, and reduces BOM count - unlike the adjustable LM2593HV-ADJ version which requires two external resistors to set VOUT.
How does the Flag pin (Pin 3) function in LM2593HVSX-5.0?
The Flag pin on LM2593HVSX-5.0 is an open-collector output that pulls low (≤1 V) when the regulated 5-V output falls below 4.75 V (95% of nominal), indicating out-of-regulation. It remains high (with external pull-up) when in regulation and can be delayed via capacitor on Pin 5. This provides system-level power-good signaling for MCU reset control or fault logging without additional supervisory ICs.
Can LM2593HVSX-5.0 operate with input voltage as low as 4.5 V?
Yes, LM2593HVSX-5.0 is specified to operate down to 4.5 V input while maintaining 5.0-V output regulation at loads up to 2 A. At this minimum VIN, dropout is managed by the internal switch's low saturation voltage (~1.3 V), enabling reliable startup and operation during automotive cold-crank conditions or brownout scenarios in industrial systems.
What thermal performance can be expected from LM2593HVSX-5.0 in TO-263 package?
In the TO-263-7 (KTW) package with 0.5 in² of 1-oz copper on a single-sided PCB, LM2593HVSX-5.0 achieves RθJA = 30°C/W. At 2 A output and 12-V input, typical power dissipation is ~1.4 W, resulting in ~42°C junction-to-ambient rise - well within the 125°C max TJ limit. For higher ambient or sustained loads, increasing copper area or adding airflow further improves thermal margin.
LM2593HVSX-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-7)
LM2593HVSX-5.0 FAQ
1.How can I place an order for LM2593HVSX-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2593HVSX-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 LM2593HVSX-5.0 reliable?
The price and inventory of LM2593HVSX-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 LM2593HVSX-5.0 is usually 5 days.
3.What payment methods are accepted for LM2593HVSX-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2593HVSX-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2593HVSX-5.0?
LM2593HVSX-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2593HVSX-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 LM2593HVSX-5.0?
For technical support, including LM2593HVSX-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2593HVSX-5.0 requirements.
6.How does Aetrix verify that LM2593HVSX-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2593HVSX-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 LM2593HVSX-5.0 meets industry standards.
7.What is the process for return or replacement of LM2593HVSX-5.0?
All LM2593HVSX-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2593HVSX-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 LM2593HVSX-5.0 part is unused and in its original packaging.
Return procedure for LM2593HVSX-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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