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Texas Instruments LM2575HVS-ADJ/NOPB
- Part No.:
- LM2575HVS-ADJ/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
LM2575HVS-ADJ/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A TO263
- Quantity:
- Payment:
- Shipping:
Inventory:353
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Product details
Overview
LM2575HVS-ADJ/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator in a 5-lead surface-mount DDPAK/TO-263 package, featuring adjustable output (1.23V to 37V), 52 kHz fixed-frequency operation, and integrated thermal shutdown and cycle-by-cycle current limiting. It delivers high-efficiency DC/DC conversion for industrial power rails requiring up to 60V input.
For engineers reviewing the LM2575HVS-ADJ/NOPB datasheet, LM2575HVS-ADJ/NOPB pinout, LM2575HVS-ADJ/NOPB application, or LM2575HVS-ADJ/NOPB equivalent, this device serves as a drop-in high-voltage buck replacement for linear regulators-offering reduced heat sink requirements, minimal external component count (4 total), and robust fault protection under overload or short-circuit conditions.
Technical Context
The LM2575HVS-ADJ/NOPB implements a fixed-frequency pulse-width modulation (PWM) buck topology with internal 52 kHz oscillator, N-channel DMOS output switch, and feedback-controlled error amplifier. Its architecture relies on external resistor divider (R1/R2) to set output voltage via 1.23V reference at the Feedback pin.
It integrates cycle-by-cycle current limiting (2.2A typical peak), thermal shutdown (150°C junction), and TTL-compatible ON/OFF control with 50 μA standby current. Input voltage range spans 8V–60V, supporting wide-input industrial and automotive pre-regulation applications without external HV bias circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1A continuous load capability-supports single-rail power delivery for microcontrollers, sensors, and analog front-ends. |
| Input Voltage Range | 8V to 60V-enables direct regulation from 24V/48V industrial buses or unregulated AC-DC outputs. |
| Output Voltage Range | 1.23V to 37V (adjustable)-set precisely using two external resistors; ±4% tolerance over line/load/temperature. |
| Switching Frequency | 52 kHz fixed-simplifies EMI filtering and allows use of low-cost, high-saturation-current off-the-shelf inductors. |
| Efficiency | Up to 88% at 12VIN/12VOUT-reduces thermal load vs. linear regulators; eliminates need for heatsink in many 1A designs. |
| Protection Features | Thermal shutdown + cycle-by-cycle current limit + TTL shutdown-ensures safe operation during fault conditions without external supervision. |
| Quiescent Current | 5 mA operating / 50 μA standby-enables low-power modes in battery-backed or energy-conscious systems. |
Pinout & Package
LM2575HVS-ADJ/NOPB uses a 5-lead DDPAK/TO-263 surface-mount package (package code KTT0005B), with exposed thermal pad for enhanced heat dissipation (θJA = 37°C/W with ≥1 in² copper area). Pin 1 is Input, Pin 2 is Output, Pin 3 is Ground, Pin 4 is Feedback, Pin 5 is ON/OFF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Power Input | Accepts 8–60V unregulated DC; requires local 100 μF/75V aluminum electrolytic bypass capacitor. |
| Pin 2 (OUT) | Switched Output | Drives external catch diode and LC filter; connects to inductor and output capacitor node. |
| Pin 3 (GND) | Power & Signal Ground | Common return for input cap, output cap, feedback network, and ON/OFF control-must be low-inductance connection. |
| Pin 4 (FEEDBACK) | Voltage Sense Input | Monitors output via resistor divider; regulates to 1.23V reference-sets VOUT = 1.23V × (1 + R2/R1). |
| Pin 5 (ON/OFF) | Enable Control | TTL-compatible shutdown: ≤0.8V = OFF (50 μA IQ), ≥2.2V = ON; open-circuit defaults to ON. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Switch | N-channel DMOS transistor with 0.9V saturation voltage at 1A-minimizes conduction loss and simplifies layout. |
| Fixed-Frequency Oscillator | 52 kHz internal clock-enables predictable EMI spectrum and eliminates need for external timing components. |
| Thermal Protection | Junction shutdown at 150°C with automatic recovery-prevents permanent damage during sustained overload or poor heatsinking. |
| Current Limiting | Cycle-by-cycle peak current limit at 2.2A (typ)-protects switch and external components during short-circuit events. |
| Low-Component Count | Only 4 external parts required (inductor, catch diode, input/output capacitors)-reduces BOM cost and board space. |
Applications
| Industrial Power Supply | Automotive Pre-Regulator |
|---|---|
|
Use Scenario: Regulating 48V truck battery or 24V rail down to 5V/12V for ECUs and instrumentation. IC Role / Device Role / Timing Role: Primary buck converter providing isolated, efficient, and fault-tolerant intermediate voltage rail. Use Value: Withstands 60V max input and operates across −40°C to +125°C, meeting automotive transient and temperature requirements. |
Use Scenario: Stepping down alternator output (up to 36V) to stable 5V for infotainment and ADAS modules. IC Role / Device Role / Timing Role: High-voltage pre-regulator feeding low-noise LDOs or point-of-load converters. Use Value: 52 kHz switching enables compact magnetics; built-in current limit prevents fuse blowing during load dump transients. |
| On-Board Telecom PSU | Positive-to-Negative Converter |
|
Use Scenario: Generating +5V or +12V from 48V telecom backplane in access equipment or base stations. IC Role / Device Role / Timing Role: Primary DC/DC stage delivering regulated power to downstream converters and logic. Use Value: TO-263 thermal performance supports 1A continuous output without heatsink on standard FR4 PCBs. |
Use Scenario: Configured in inverting buck-boost topology to generate −5V or −12V from positive input. IC Role / Device Role / Timing Role: Core switching element enabling bipolar supply generation with minimal added components. Use Value: Adjustable feedback reference and robust current limit allow stable inverting operation with standard diode/inductor selection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2576HVS-ADJ | 63V max input, 3A output, 52 kHz, same pinout but higher current rating and larger thermal footprint. | Suitable for >1A loads; requires larger inductor and diode; not a drop-in replacement due to different current sense and thermal design. | Select when output current exceeds 1A or input may exceed 60V transiently. |
| TPS5430DDAR | 3A output, 60V input, 500 kHz switching, SO-8 package, no integrated compensation-requires external loop components. | Better efficiency at light loads and smaller solution size; lacks integrated thermal/current protection in same degree. | Choose for higher density, higher efficiency, or programmable frequency-accepting increased design complexity. |
Compared with LM2576HVS-ADJ and TPS5430DDAR, the LM2575HVS-ADJ/NOPB offers the simplest 1A buck implementation with full protection and minimal external parts, making it ideal for cost-sensitive, thermally constrained, or legacy-design-refresh applications where 52 kHz EMI profile and proven reliability are prioritized.
Availability
LM2575HVS-ADJ/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive pre-regulators, telecom on-board converters, and positive-to-negative converter circuits requiring stable component supply and long-term manufacturability.
Supply support for LM2575HVS-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 specializing in analog, embedded processing, and power management technologies, with decades of expertise in highly reliable power conversion ICs.
The LM2575 series was designed specifically for simple, robust, high-voltage buck regulation in industrial, automotive, and telecom applications-emphasizing ease of use, thermal resilience, and minimal external component count.
FAQ
What is the maximum input voltage rating for LM2575HVS-ADJ/NOPB?
The LM2575HVS-ADJ/NOPB has an absolute maximum input voltage of 63V and an operating input voltage range of 8V to 60V. This high-voltage capability makes it suitable for 48V industrial systems and automotive applications where load dump transients occur. Operation above 60V risks exceeding specified electrical limits and is not recommended for reliable long-term use.
How do I set the output voltage for LM2575HVS-ADJ/NOPB?
The LM2575HVS-ADJ/NOPB output voltage is set using two external resistors (R1 and R2) forming a voltage divider from output to ground, with the midpoint connected to the Feedback (Pin 4) terminal. The formula is VOUT = 1.23V × (1 + R2/R1), where R1 is typically 1kΩ–5kΩ. For example, R1 = 2.0kΩ and R2 = 6.12kΩ yields 5.0V. Precision 1% metal film resistors are recommended for stability.
Does LM2575HVS-ADJ/NOPB require a heatsink in standard operation?
No, the LM2575HVS-ADJ/NOPB does not require an external heatsink under typical 1A continuous operation when mounted on a PCB with ≥1 in² of copper area connected to its exposed thermal pad (θJA = 37°C/W). Thermal shutdown activates at 150°C junction temperature, providing safety margin. Heatsinking becomes necessary only under sustained high ambient temperatures (>85°C) or poor PCB copper layout.
What type of catch diode should be used with LM2575HVS-ADJ/NOPB?
A Schottky diode rated for ≥1.2× the maximum load current and ≥1.25× the maximum input voltage is required. For LM2575HVS-ADJ/NOPB at 1A and 60V input, a 3A/40V Schottky such as MBR340 or SR104 is appropriate. Fast-recovery diodes like UF4007 may be used if Schottky availability is limited, though efficiency will decrease slightly due to higher forward voltage.
Is LM2575HVS-ADJ/NOPB pin-compatible with other LM2575 variants?
Yes, the LM2575HVS-ADJ/NOPB shares identical pinout and footprint with all LM2575T/LM2575HVT/LM2575S/LM2575HVS variants in TO-220 and TO-263 packages. However, the "HV" suffix denotes 60V input capability versus 40V for standard LM2575, so substituting non-HV versions in high-input designs risks failure. Always verify input voltage range before interchange.
LM2575HVS-ADJ/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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 57V
- Current - Output:
- 1A
- Frequency - Switching:
- 52kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-5)
LM2575HVS-ADJ/NOPB FAQ
1.How can I place an order for LM2575HVS-ADJ/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVS-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 LM2575HVS-ADJ/NOPB reliable?
The price and inventory of LM2575HVS-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 LM2575HVS-ADJ/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575HVS-ADJ/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVS-ADJ/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVS-ADJ/NOPB?
LM2575HVS-ADJ/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVS-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 LM2575HVS-ADJ/NOPB?
For technical support, including LM2575HVS-ADJ/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVS-ADJ/NOPB requirements.
6.How does Aetrix verify that LM2575HVS-ADJ/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575HVS-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 LM2575HVS-ADJ/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575HVS-ADJ/NOPB?
All LM2575HVS-ADJ/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVS-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 LM2575HVS-ADJ/NOPB part is unused and in its original packaging.
Return procedure for LM2575HVS-ADJ/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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