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Texas Instruments LM2574HVM-5.0/NOPB
- Part No.:
- LM2574HVM-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2574HVM-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 500MA 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,223
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Product details
Overview
LM2574HVM-5.0/NOPB from Texas Instruments (formerly National Semiconductor) is a monolithic 0.5A step-down (buck) switching voltage regulator with fixed 5.0V output, 52 kHz internal oscillator, 60V maximum input voltage, ±4% output voltage tolerance, and integrated thermal shutdown and cycle-by-cycle current limiting. It delivers high-efficiency power conversion in industrial control power supplies requiring compact, low-component-count DC-DC solutions.
For engineers reviewing the LM2574HVM-5.0/NOPB datasheet, LM2574HVM-5.0/NOPB pinout, LM2574HVM-5.0/NOPB application, or LM2574HVM-5.0/NOPB equivalent, key selection criteria include input voltage range (7–60V), guaranteed 0.5A output current, fixed-frequency operation, TTL-compatible shutdown, and compatibility with standard off-the-shelf inductors and Schottky catch diodes.
Technical Context
The LM2574HVM-5.0/NOPB implements a self-contained buck topology with an internal NPN power switch, fixed-frequency 52 kHz oscillator, and built-in frequency compensation. Its control architecture relies on pulse-width modulation with peak-current limiting and automatic duty-cycle reduction during overload or short-circuit events.
It operates across −40°C to +125°C junction temperature, supports external shutdown via TTL-level ON/OFF pin (VIH ≥2.4V, VIL ≤0.8V), and maintains regulation under line (7–60V VIN) and load (0.1–0.5A) variations while delivering up to 77% efficiency at 12V input/5V output/0.5A load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% over full operating temperature and load (0.1–0.5A) with 7–60V input |
| Max Input Voltage | 60V - enables direct regulation from unregulated 48V telecom or industrial rails without pre-regulation |
| Output Current | Guaranteed 0.5A continuous - sufficient for powering microcontrollers, sensors, and interface ICs |
| Oscillator Frequency | 52 kHz ±10% - fixed frequency simplifies EMI filtering and allows use of low-cost, high-saturation-current inductors |
| Efficiency | 77% at VIN = 12V, VOUT = 5V, IOUT = 0.5A - reduces thermal load and eliminates need for heatsinks in most PCB layouts |
| Shutdown Current | 50 µA typical - enables low-power standby mode with TTL-compatible ON/OFF control |
| Thermal Protection | Internal thermal shutdown - disables output when junction temperature exceeds safe limit, preventing damage |
Pinout & Package
LM2574HVM-5.0/NOPB is housed in a 14-lead wide-body surface-mount package (NS package code M14B), thermally enhanced for high-power-density applications. The exposed pad (Pin 14) must be soldered to a large copper area for optimal heat transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Power Supply | Accepts 7–60V DC; requires local 22 µF aluminum electrolytic bypass capacitor |
| 2 (GND) | Power Ground | Common return for input capacitor, output capacitor, and catch diode cathode |
| 3 (OUT) | Switch Node | Drives external catch diode anode and inductor; carries pulsed 0.5A switching current |
| 4 (FEEDBACK) | Feedback Input | Not connected for fixed-output versions; internally tied to output divider network |
| 5 (ON/OFF) | Shutdown Control | TTL-compatible logic input; <0.8V = ON, >2.4V = OFF; draws ≤30 µA in shutdown |
| 6–13 (NC) | No Internal Connection | Not bonded; may be used as thermal relief pads or left floating per layout guidelines |
| 14 (PAD) | Thermal Pad / GND | Exposed metal pad; must be soldered to ≥4 in² copper pour for θJA = 78°C/W |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Buck Controller + Power Switch | Eliminates need for external MOSFET driver or gate control circuitry |
| Fixed-Frequency 52 kHz Oscillator | Enables predictable EMI profile and simplifies input/output filter design |
| Cycle-by-Cycle Current Limiting | Protects against short-circuit and overload by limiting peak switch current to 0.65–1.8A |
| TTL-Compatible Shutdown | Allows system-level power sequencing with microcontroller GPIO without level-shifting |
| Thermal Shutdown with Hysteresis | Automatically recovers after cooling, preventing latch-up during transient overloads |
Applications
| Industrial PLC I/O Power | Automotive Body Control Module |
|---|---|
Use Scenario: Provides isolated 5V rail for digital I/O expansion cards in programmable logic controllers operating from 24V or 48V field buses. IC Role / Device Role / Timing Role: Primary step-down regulator converting unregulated 24–48V supply to stable 5V for microcontroller peripherals and optocoupler drivers. Use Value: Delivers 0.5A with ±4% accuracy across −40°C to +85°C ambient, eliminating need for linear post-regulation and reducing board space by 40% vs. LDO-based solutions. | Use Scenario: Powers CAN transceivers, sensor interfaces, and MCU peripherals in automotive body electronics modules supplied from 12V battery rail with load-dump transients. IC Role / Device Role / Timing Role: High-input-voltage buck regulator handling up to 60V input surges while maintaining regulated 5V output during cold-crank and load-dump conditions. Use Value: Withstands 60V absolute max input and features thermal shutdown, enabling robust operation without external surge protection beyond basic TVS diodes. |
| Medical Diagnostic Sensor Interface | Point-of-Sale Terminal Power |
Use Scenario: Supplies clean 5V power to precision analog front-ends and ADCs in portable diagnostic devices powered by 12V Li-ion packs. IC Role / Device Role / Timing Role: Efficient pre-regulator feeding low-noise LDOs; operates in discontinuous mode at light loads to minimize standby current. Use Value: Achieves 50 µA shutdown current and 77% efficiency at full load, extending battery life while meeting IEC 60601 ripple requirements via proper LC filter design. | Use Scenario: Generates 5V for embedded payment processors, display drivers, and USB peripherals in retail terminals using 12V wall adapters. IC Role / Device Role / Timing Role: Main DC-DC converter replacing linear regulators to reduce heat generation in enclosed plastic enclosures. Use Value: Requires only four external components (inductor, diode, input/output caps), cutting BOM cost by 35% versus controller+MOSFET solutions and accelerating time-to-market. |
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-5.0 | Higher 3A output current, 52 kHz frequency, wider 4–60V input range, but larger SOIC-16 package and higher quiescent current (10 mA vs. 5 mA) | Better suited for higher-current loads (>0.5A); less optimal for space-constrained designs due to larger footprint | Select when output current demand exceeds 0.5A or when tighter line regulation (<±2%) is required |
| TPS54202DR | Synchronous 2A buck converter, 4.5–28V input, 500 kHz switching, integrated high/low-side MOSFETs, but requires external compensation and lacks HV input capability | Designed for lower-input-voltage systems (e.g., 12V or 24V rails); not suitable for 48V or load-dump tolerant applications | Choose for higher efficiency (>90%) and smaller inductor size where input voltage stays below 28V |
Compared with LM2576HVS-5.0 and TPS54202DR, LM2574HVM-5.0/NOPB offers the optimal balance of HV input support (60V), minimal external component count (4 parts), and proven reliability in industrial environments-making it ideal for cost-sensitive, medium-current, wide-input applications where synchronous efficiency is secondary to ruggedness and simplicity.
Availability
LM2574HVM-5.0/NOPB is available at Aetrix Electronics and suitable for industrial control power supplies, automotive body electronics, medical sensor interfaces, and point-of-sale terminal designs requiring stable component supply and long-term manufacturability.
Supply support for LM2574HVM-5.0/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 acquired National Semiconductor in 2011 and maintains full technical and manufacturing continuity for the SIMPLE SWITCHER™ product line.
The LM2574HVM-5.0/NOPB belongs to TI's SIMPLE SWITCHER™ family of integrated buck regulators, designed specifically for engineers needing robust, easy-to-use DC-DC conversion without complex loop compensation or external FETs.
FAQ
What is the maximum input voltage rating for LM2574HVM-5.0/NOPB?
The LM2574HVM-5.0/NOPB has an absolute maximum input voltage rating of 63V and a recommended operating maximum of 60V. This high-voltage capability allows direct regulation from 48V industrial buses or automotive systems experiencing load-dump transients, distinguishing it from standard LM2574 variants rated for 40V max input. Always observe derating guidelines above 50°C ambient.
Does LM2574HVM-5.0/NOPB require an external feedback resistor network?
No, LM2574HVM-5.0/NOPB does not require external feedback resistors. As a fixed-output version, its 5.0V regulation is implemented internally using a precision trimmed resistor divider. The FEEDBACK pin (Pin 4) is not connected and must remain unconnected in PCB layout - unlike adjustable versions such as LM2574HVM-ADJ which require external R1/R2.
What is the thermal resistance (θJA) of LM2574HVM-5.0/NOPB in its M14B package?
LM2574HVM-5.0/NOPB in the 14-lead wide-body surface-mount (M14B) package has a junction-to-ambient thermal resistance of 78°C/W when mounted on 4 in² of 1 oz. copper, and 102°C/W with 1 in² copper. The exposed thermal pad (Pin 14) must be soldered to the PCB copper pour to achieve the lower value; insufficient thermal land area will cause excessive junction temperature rise under 0.5A load.
Can LM2574HVM-5.0/NOPB be used in discontinuous conduction mode (DCM)?
Yes, LM2574HVM-5.0/NOPB operates reliably in both continuous and discontinuous conduction modes. At light loads (<~50 mA), inductor current naturally falls to zero each cycle - a normal and stable operating condition. DCM reduces light-load quiescent current and improves efficiency at partial load, though output ripple increases slightly. No design changes are needed to support DCM operation.
What type of catch diode is recommended for LM2574HVM-5.0/NOPB?
A Schottky diode with ≥1A average current rating and ≥20V reverse voltage rating is recommended for LM2574HVM-5.0/NOPB - e.g., SR102, 1N5817, or MBR120P. Schottky diodes minimize forward voltage drop (typically 0.3–0.5V), reducing power loss and improving efficiency. Fast-recovery diodes like 11DQ06 are acceptable alternatives if Schottky parts are unavailable, but will incur ~0.2V higher conduction loss.
LM2574HVM-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 52kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LM2574HVM-5.0/NOPB FAQ
1.How can I place an order for LM2574HVM-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2574HVM-5.0/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 LM2574HVM-5.0/NOPB reliable?
The price and inventory of LM2574HVM-5.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2574HVM-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2574HVM-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2574HVM-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2574HVM-5.0/NOPB?
LM2574HVM-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2574HVM-5.0/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 LM2574HVM-5.0/NOPB?
For technical support, including LM2574HVM-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2574HVM-5.0/NOPB requirements.
6.How does Aetrix verify that LM2574HVM-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2574HVM-5.0/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 LM2574HVM-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2574HVM-5.0/NOPB?
All LM2574HVM-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2574HVM-5.0/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 LM2574HVM-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2574HVM-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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