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Texas Instruments LM2593HVT-ADJ/NOPB
- Part No.:
- LM2593HVT-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-7 Formed Leads
- Datasheet:
-
LM2593HVT-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A TO220-7
- Quantity:
- Payment:
- Shipping:
Inventory:116
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Product details
Overview
LM2593HVT-ADJ/NOPB from Texas Instruments is a monolithic non-synchronous step-down DC-DC converter IC delivering up to 2 A output current with ±4% output voltage accuracy over line and load, 150-kHz fixed switching frequency, and input voltage range up to 60 V. It serves as the core regulator in high-voltage industrial power supplies and automotive subsystems requiring robust buck conversion.
For engineers reviewing the LM2593HVT-ADJ/NOPB datasheet, LM2593HVT-ADJ/NOPB pinout, LM2593HVT-ADJ/NOPB application, or LM2593HVT-ADJ/NOPB equivalent, key selection criteria include its adjustable 1.2–57 V output range, integrated shutdown/soft-start control, out-of-regulation error flag with programmable delay, thermal shutdown, and current-limit protection - all in a TO-263-7 package.
Technical Context
The LM2593HVT-ADJ/NOPB implements a fixed-frequency (150 kHz) current-mode PWM controller with internal compensation, enabling stable operation with minimal external components. Its feedback loop references a precise 1.23 V internal bandgap (±1.5% over temperature), and regulation is maintained via duty-cycle adjustment of an integrated N-channel MOSFET switch.
Functional modes include active regulation, shutdown (90 μA IQ), and soft-start (capacitor-programmable ramp). The device features dual-stage current limiting, thermal shutdown at 150°C junction temperature, and an open-collector error flag with 1.3 V threshold and 3 mA sink capability - all coordinated through dedicated SD/SS, Flag, and Delay pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2 A DC continuous - supports industrial loads without external current boosting. |
| Input Voltage Range | 4.5 V to 60 V - enables direct connection to 48 V telecom, 24 V industrial, or automotive battery rails. |
| Output Voltage Range | 1.2 V to 57 V adjustable - set via external resistor divider; no fixed-output variants required. |
| Feedback Reference | 1.23 V ±1.5% - ensures tight output tolerance even under wide temperature and load variation. |
| Switching Frequency | 150 kHz ±15% - allows use of compact, low-cost inductors and capacitors vs. lower-frequency alternatives. |
| Quiescent Current | 90 μA in shutdown - minimizes standby power in always-on systems like telematics or remote sensors. |
| Thermal Protection | Junction shutdown at 150°C - prevents damage during overload or poor heatsinking conditions. |
Pinout & Package
LM2593HVT-ADJ/NOPB is housed in a 7-pin TO-263 (KTW) surface-mount package with exposed thermal pad for enhanced heat dissipation. Package dimensions: 10.10 mm × 8.89 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Input supply | Accepts 4.5–60 V DC; requires local low-ESR bypass capacitor to handle high di/dt switching currents. |
| 2 Output | Internal switch node | Drives external Schottky diode and inductor; swings between ~VIN−1.3 V and −0.5 V during operation. |
| 3 Flag | Error flag output | Open-collector signal goes low ≤1 V when output drops below 95% of target; sinks up to 3 mA. |
| 4 Ground | Power and signal reference | Common return for input/output paths and internal circuitry; must be low-impedance PCB plane. |
| 5 Delay | Flag delay timing | Capacitor-connected pin sets power-up delay before Flag asserts high; charged by 3 μA internal current source. |
| 6 Feedback | Voltage sense input | Compares divided output voltage against 1.23 V reference; determines regulation point for adjustable output. |
| 7 SD/SS | Shutdown/Soft-start control | Drives low (≤0.6 V) for shutdown (90 μA IQ); capacitor here enables controlled output voltage ramp-up. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable output voltage | 1.2 V to 57 V via two-resistor divider - eliminates need for multiple fixed-output SKUs in BOM. |
| Integrated error flag with delay | Programmable power-good assertion timing - enables sequenced system startup and fault isolation. |
| Shutdown and soft-start | Single-pin control (SD/SS) with 90 μA standby and capacitor-programmable ramp - simplifies power sequencing. |
| Thermal and current protection | Two-stage current limit + 150°C junction shutdown - ensures safe operation under short-circuit or overload. |
| High-efficiency buck topology | Up to 81% efficiency at 5 V output (VIN = 12 V, IOUT = 2 A) - reduces thermal load and improves system energy budget. |
Applications
| Industrial Power Supply | Automotive Body Control Module |
|---|---|
|
Use Scenario: Converting 24 V vehicle battery or 48 V PoE+ rail to 3.3 V/5 V for microcontrollers and sensors. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator providing stable, protected DC output for safety-critical logic. Use Value: 60 V max input withstands load-dump transients; thermal shutdown prevents failure during under-hood overheating. |
Use Scenario: Powering CAN transceivers, door-lock actuators, and interior lighting controllers in 12 V/24 V vehicles. IC Role / Device Role / Timing Role: High-reliability step-down converter with error flag signaling power-good status to MCU. Use Value: Adjustable output supports diverse rail requirements; soft-start prevents inrush current on cold crank. |
| Telecom Remote Radio Unit | Test & Measurement Equipment |
|
Use Scenario: Generating isolated 12 V bias from 48 V backplane in outdoor base station RF modules. IC Role / Device Role / Timing Role: Pre-regulator feeding linear post-regulators for ultra-low-noise analog circuits. Use Value: 150 kHz switching enables small magnetics; ±4% output tolerance ensures consistent ADC reference stability. |
Use Scenario: Providing user-configurable auxiliary rails (e.g., ±15 V, 24 V) in portable benchtop instruments. IC Role / Device Role / Timing Role: Flexible, field-programmable DC-DC stage supporting multiple output voltages from single design. Use Value: 1.2–57 V adjustability eliminates redesign for new voltage requirements; TO-263 package aids thermal management on dense PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596HV-ADJ | Higher 3 A output current; same 60 V input and 150 kHz frequency; larger TO-220-5 package. | Better suited for higher-current loads but lacks Flag and Delay pins - no built-in power-good signaling. | Select when >2 A output is needed and error flag functionality is not required. |
| TPS54202DRT | Synchronous 2 A buck with 4.5–28 V input; 500 kHz switching; smaller 8-pin SOIC package; no error flag. | Optimized for space-constrained, medium-input-voltage designs; lacks high-voltage capability and supervision features. | Select for compact 12–24 V systems where footprint and efficiency outweigh high-voltage tolerance and fault reporting. |
Compared with LM2596HV-ADJ and TPS54202DRT, the LM2593HVT-ADJ/NOPB uniquely combines 60 V input rating, integrated error flag with delay, and TO-263 thermal performance - making it the only choice for ruggedized, high-voltage applications requiring power-good monitoring and reliable fault detection.
Availability
LM2593HVT-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and telecom infrastructure requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM2593HVT-ADJ/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 designing analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.
The LM2593HV family was engineered as part of TI's SIMPLE SWITCHER® portfolio to deliver robust, easy-to-use DC-DC conversion for high-input-voltage applications where reliability and minimal external components are critical.
FAQ
What is the maximum input voltage rating for LM2593HVT-ADJ/NOPB?
The LM2593HVT-ADJ/NOPB has an absolute maximum input voltage rating of 63 V and a recommended operating range of 4.5 V to 60 V. This 60 V upper limit enables direct use with 48 V industrial buses and automotive systems subject to load-dump transients. Exceeding 63 V risks permanent damage per the Absolute Maximum Ratings table in the datasheet.
How is the output voltage set on LM2593HVT-ADJ/NOPB?
The LM2593HVT-ADJ/NOPB uses a resistor divider network connected between output, feedback (Pin 6), and ground to set the output voltage. With a precise 1.23 V internal reference, the formula is VOUT = 1.23 V × (1 + R1/R2). Typical designs use R2 = 1 kΩ and calculate R1 accordingly - e.g., 5 V output requires R1 ≈ 3.06 kΩ (1% tolerance).
Does LM2593HVT-ADJ/NOPB include thermal protection?
Yes, the LM2593HVT-ADJ/NOPB incorporates thermal shutdown that activates at approximately 150°C junction temperature. When triggered, the device halts switching and enters a safe state until the die cools below the hysteresis threshold (~135°C). This feature is fully integrated and requires no external components, protecting against sustained overload or inadequate heatsinking.
What is the purpose of the Delay pin (Pin 5) on LM2593HVT-ADJ/NOPB?
The Delay pin (Pin 5) on LM2593HVT-ADJ/NOPB controls the time interval between output regulation and assertion of the high signal on the Flag pin (Pin 3). A capacitor connected here is charged by a 3 μA internal current source; Flag goes high when the capacitor voltage exceeds 1.3 V. This provides programmable power-good delay for system sequencing without external timers.
Can LM2593HVT-ADJ/NOPB operate in discontinuous conduction mode (DCM)?
Yes, the LM2593HVT-ADJ/NOPB operates in both continuous and discontinuous conduction modes depending on load current and inductor value. At light loads (<~300 mA with typical 33 µH inductor), the inductor current falls to zero each cycle - entering DCM. The datasheet includes load transient waveforms and efficiency curves for both modes, confirming stable regulation across the full 0–2 A range.
LM2593HVT-ADJ/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-7 Formed Leads
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- 57V
- 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-ADJ/NOPB FAQ
1.How can I place an order for LM2593HVT-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2593HVT-ADJ/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 LM2593HVT-ADJ/NOPB reliable?
The price and inventory of LM2593HVT-ADJ/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2593HVT-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM2593HVT-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2593HVT-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2593HVT-ADJ/NOPB?
LM2593HVT-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2593HVT-ADJ/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 LM2593HVT-ADJ/NOPB?
For technical support, including LM2593HVT-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2593HVT-ADJ/NOPB requirements.
6.How does Aetrix verify that LM2593HVT-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2593HVT-ADJ/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 LM2593HVT-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM2593HVT-ADJ/NOPB?
All LM2593HVT-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2593HVT-ADJ/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 LM2593HVT-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM2593HVT-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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