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Texas Instruments LM2574HVMX-5.0
- Part No.:
- LM2574HVMX-5.0
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2574HVMX-5.0.pdf
- Description:
- IC REG BUCK 5V 500MA 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,479
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Product details
Overview
LM2574HVMX-5.0 from Texas Instruments (formerly National Semiconductor) is a monolithic 0.5A step-down (buck) switching voltage regulator with fixed 5.0V output, 60V maximum input voltage, 52 kHz internal oscillator, ±4% output voltage tolerance, and integrated thermal shutdown and cycle-by-cycle current limiting. It replaces linear regulators in industrial power supplies requiring high efficiency and minimal external components.
For engineers reviewing the LM2574HVMX-5.0 datasheet, LM2574HVMX-5.0 pinout, LM2574HVMX-5.0 application, or LM2574HVMX-5.0 equivalent, this page delivers verified technical context, package-specific pin functions, real-world design meaning of key specs, and two validated alternative parts for buck converter designs operating up to 60V input.
Technical Context
The LM2574HVMX-5.0 implements a fixed-frequency, current-mode buck topology with an internal NPN switch, feedback comparator, oscillator, and protection circuitry. Its 52 kHz switching frequency enables use of standard off-the-shelf inductors while balancing EMI and efficiency.
It operates in continuous conduction mode (CCM) across typical loads (0.1–0.5A) with input voltages from 7V to 60V, delivering regulated 5.0V ±4% output. Standby current is 50 µA typical via TTL-compatible ON/OFF control, and saturation voltage is 0.9V typical at 0.5A load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% over full temperature and load range - ensures stable logic supply without external resistors. |
| Max Input Voltage | 60V - supports wide-input industrial, automotive, and telecom power rails without pre-regulation. |
| Output Current | Guaranteed 0.5A - sufficient for powering microcontrollers, sensors, and interface ICs directly. |
| Switching Frequency | 52 kHz ±10% - enables use of low-cost, high-current inductors and reduces EMI filtering complexity. |
| Efficiency | 77% at VIN = 12V, IOUT = 0.5A - minimizes thermal stress and eliminates need for heatsinks on PCB copper. |
| Standby Current | 50 µA typical - enables low-power system sleep modes without auxiliary LDOs. |
| Protection | Cycle-by-cycle current limit + thermal shutdown - prevents damage during short-circuit or overload events. |
Pinout & Package
LM2574HVMX-5.0 is supplied in a 14-lead wide-body surface-mount (WM) package (NS package code M14B), optimized for thermal performance with 78°C/W junction-to-ambient resistance using 4 in² copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Power Supply | Accepts 7–60V DC; requires ≥22 µF input capacitor near pin for stability. |
| 2 (GND) | Power Ground | Common return for input/output capacitors, inductor, and diode; must connect to low-impedance ground plane. |
| 3 (OUT) | Switch Node | Drives external catch diode and inductor; carries pulsed 0.5A current with fast edges. |
| 4 (FEEDBACK) | Output Sensing (N/C for fixed) | No connection required - internally tied to 5.0V reference; unused in LM2574HVMX-5.0. |
| 5 (ON/OFF) | Enable/Shutdown Control | TTL-compatible; <0.8V = ON, >2.4V = OFF; draws only 50 µA in shutdown. |
| 6–14 | Thermal Pad / GND | Exposed pad (pins 6–14) is electrically GND and primary thermal path - must be soldered to ≥4 in² copper pour. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V output | Eliminates external resistor divider, reducing BOM count and layout sensitivity for standard logic rail generation. |
| 60V input rating | Supports direct connection to unregulated 48V systems or automotive battery transients without external TVS or LDO pre-regulator. |
| 52 kHz oscillator | Enables use of low-cost, high-saturation-current inductors (e.g., Pulse PE-52627, Renco RL-1284-330) with minimal core loss. |
| TTL shutdown | Allows system-level power sequencing and low-power sleep states with no additional driver circuitry. |
| Internal current limit & thermal shutdown | Provides self-protecting operation under fault conditions - no external current-sense resistor or thermal sensor needed. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
|
Use Scenario: Powering isolated digital I/O drivers, ADC references, and CAN transceivers from a 24V rail in harsh factory environments. IC Role / Device Role / Timing Role: Primary 5V buck regulator supplying logic and analog subsystems with ripple <50 mVpp and line regulation <0.5%/V. Use Value: High input voltage tolerance (60V) withstands 40V load-dump transients; thermal shutdown prevents latch-up during ambient temperature spikes to 125°C. |
Use Scenario: Generating 5V for microcontroller, EEPROM, and LIN transceiver in door module or seat controller. IC Role / Device Role / Timing Role: Compact, single-chip DC-DC solution replacing discrete transistor+LDO combinations on space-constrained PCBs. Use Value: 50 µA standby current extends battery life during vehicle sleep mode; 14-pin WM package allows automated assembly and robust thermal coupling to chassis ground. |
| Point-of-Load Telecom Converter | Medical Sensor Interface Supply |
|
Use Scenario: Local 5V conversion from a centralized 48V backplane in base station radio units. IC Role / Device Role / Timing Role: Efficient pre-regulator feeding low-noise LDOs for RF and clock circuits. Use Value: 77% efficiency at 12V input reduces heat density in densely packed modules; fixed 52 kHz frequency simplifies EMI filter design. |
Use Scenario: Providing clean, isolated 5V power to analog front-end amplifiers and precision ADCs in portable diagnostic devices. IC Role / Device Role / Timing Role: Primary switching regulator with external LC filter stage to meet stringent ripple (<10 mVpp) requirements. Use Value: Guaranteed ±4% output accuracy ensures consistent ADC reference scaling; thermal shutdown protects against enclosure overheating during extended operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2576HVS-5.0 | 0.3A higher output current (3A vs. 0.5A), 52 kHz frequency, wider input range (60V), but larger SOIC-16 package and higher quiescent current (10 mA vs. 5 mA). | Suitable for higher-load applications like motor drivers or multi-rail supplies where 0.5A is insufficient. | Select LM2576HVS-5.0 when >0.5A output or tighter load regulation is required; verify PCB layout accommodates larger thermal pad and higher peak currents. |
| TPS54202DR | 2A synchronous buck, 4.5–28V input, 500 kHz switching, integrated MOSFETs, but requires external compensation and lacks HV input capability. | Better suited for compact, high-efficiency 12V/24V input systems where board space and efficiency outweigh HV tolerance needs. | Choose TPS54202DR for space-constrained 12V systems needing >0.5A; avoid for 48V+ inputs or where 60V absolute max rating is mandatory. |
Compared with LM2574HVMX-5.0, LM2576HVS-5.0 offers higher current headroom at the cost of larger footprint and higher idle power, while TPS54202DR delivers superior efficiency and integration below 28V input but cannot replace LM2574HVMX-5.0 in 48V industrial or automotive transient-prone environments.
Availability
LM2574HVMX-5.0 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body controllers, telecom point-of-load converters, and medical sensor interfaces requiring stable component supply across long production lifecycles.
Supply support for LM2574HVMX-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 acquired National Semiconductor in 2011 and maintains its SIMPLE SWITCHER™ portfolio as a cornerstone of robust, easy-to-use power management ICs.
The LM2574HVMX-5.0 belongs to the SIMPLE SWITCHER™ buck regulator family, designed specifically for engineers seeking reliable, low-component-count DC-DC solutions for industrial, automotive, and telecom applications with wide input voltage ranges.
FAQ
What is the maximum input voltage rating for LM2574HVMX-5.0?
The LM2574HVMX-5.0 has a maximum input voltage rating of 60V, confirmed in the Absolute Maximum Ratings table. This HV version supports operation from 7V up to 60V input, making it suitable for 48V systems and automotive applications with load-dump transients. Exceeding 60V risks permanent damage, and the device will shut down thermally before reaching destructive junction temperatures.
Does LM2574HVMX-5.0 require external feedback resistors?
No, LM2574HVMX-5.0 does not require external feedback resistors. As a fixed-output variant, its 5.0V regulation is implemented internally; the FEEDBACK pin (Pin 4) is not connected and must remain unconnected on the PCB. This eliminates resistor tolerance errors and layout sensitivity, distinguishing it from the adjustable LM2574HV-ADJ version.
What package type is used for LM2574HVMX-5.0?
LM2574HVMX-5.0 uses a 14-lead wide-body surface-mount (WM) package (National Semiconductor package code M14B), featuring an exposed thermal pad (Pins 6–14) that must be soldered to a minimum 4 in² copper area for optimal thermal performance (78°C/W θJA). This differs from the 8-pin DIP (N08A) and SOIC variants used in other LM2574 family members.
How does the ON/OFF pin function on LM2574HVMX-5.0?
The ON/OFF pin (Pin 5) on LM2574HVMX-5.0 provides TTL-compatible enable control: applying <0.8V turns the regulator ON, while >2.4V places it in low-power shutdown with 50 µA typical standby current. The pin draws ≤30 µA in shutdown and ≤12 µA when active, enabling simple microcontroller GPIO interfacing without level-shifting circuitry.
What inductor value is recommended for LM2574HVMX-5.0 at 12V input and 0.5A load?
For LM2574HVMX-5.0 operating at VIN = 12V and IOUT = 0.5A, the recommended inductor value is 330 µH, per Figure 5 (LM2574HV-5.0 Inductor Selection Guide) in the datasheet. Valid part numbers include Pulse Engineering PE-52627, Renco RL-1284-330-43, or NPI NP5920/5921 - all rated for ≥1.5×0.5A = 0.75A DC current and 52 kHz operation.
LM2574HVMX-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 14-SOIC (0.295", 7.50mm Width)
- 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):
- 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
LM2574HVMX-5.0 FAQ
1.How can I place an order for LM2574HVMX-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2574HVMX-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 LM2574HVMX-5.0 reliable?
The price and inventory of LM2574HVMX-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 LM2574HVMX-5.0 is usually 5 days.
3.What payment methods are accepted for LM2574HVMX-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2574HVMX-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2574HVMX-5.0?
LM2574HVMX-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2574HVMX-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 LM2574HVMX-5.0?
For technical support, including LM2574HVMX-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2574HVMX-5.0 requirements.
6.How does Aetrix verify that LM2574HVMX-5.0 is sourced from the original manufacturer or authorized distributors?
All LM2574HVMX-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 LM2574HVMX-5.0 meets industry standards.
7.What is the process for return or replacement of LM2574HVMX-5.0?
All LM2574HVMX-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM2574HVMX-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 LM2574HVMX-5.0 part is unused and in its original packaging.
Return procedure for LM2574HVMX-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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