My Inquiry
My Account
Texas Instruments LM2574HVMX-5.0/NOPB
- Part No.:
- LM2574HVMX-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2574HVMX-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 500MA 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,150
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2574HVMX-5.0/NOPB from Texas Instruments 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 - used in industrial power supplies and embedded DC-DC conversion stages.
For engineers reviewing the LM2574HVMX-5.0/NOPB datasheet, LM2574HVMX-5.0/NOPB pinout, LM2574HVMX-5.0/NOPB application, or LM2574HVMX-5.0/NOPB equivalent, this page delivers verified electrical specs, package mapping to SOIC-14, real-world design meaning of key parameters, and two validated alternative parts for buck regulator redesigns requiring high-input-voltage capability.
Technical Context
The LM2574HVMX-5.0/NOPB implements a fixed-frequency (52 kHz) current-mode buck topology with internal NPN switch, feedback comparator, oscillator, and protection circuitry. It operates in continuous or discontinuous conduction mode depending on load and inductor selection.
Its HV variant supports up to 60V input, enabling direct regulation from unregulated 48V telecom rails or automotive battery transients. The 5.0V fixed output is internally trimmed and does not require external resistors, simplifying layout and reducing BOM count.
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 trimming or feedback network. |
| Max Input Voltage | 60V - supports operation directly from 48V systems with transient headroom, eliminating need for pre-regulation. |
| Output Current | Guaranteed 0.5A - sufficient for powering microcontrollers, sensors, and interface ICs in industrial modules. |
| Oscillator Frequency | 52 kHz ±10% - enables use of low-cost, high-saturation-current inductors and reduces EMI filtering complexity. |
| Efficiency | 77% at VIN=12V, IOUT=0.5A - significantly higher than linear regulators, minimizing thermal stress on PCB copper. |
| Standby Current | 50 µA typical with ON/OFF pin high - enables low-power sleep modes in battery-backed or energy-conscious designs. |
| Thermal Protection | Integrated thermal shutdown - prevents damage during overload or poor heatsinking; auto-recovery on cooldown. |
Pinout & Package
LM2574HVMX-5.0/NOPB is housed in a 14-pin SOIC (Small Outline Integrated Circuit) package (TI package code SOIC-14, NS package M14B), with exposed pad for enhanced thermal performance. Pin 1 is marked by notch or dot; pins are numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Supply | Accepts 7–60V DC; requires local 22 µF electrolytic bypass capacitor to suppress switching noise. |
| 2 (GND) | Power Ground | Main return path for switch current and control circuitry; must connect to low-impedance ground plane. |
| 3 (OUT) | Switch Node | Drives external catch diode and inductor; high dv/dt node - keep trace short and away from sensitive signals. |
| 4 (GND) | Power Ground | Second ground pin for improved thermal and current handling; tie directly to same ground plane as Pin 2. |
| 5 (ON/OFF) | Enable Control | TTL-compatible shutdown input; <1.0V disables regulator (50 µA standby), >2.4V enables normal operation. |
| 6 (GND) | Power Ground | Third ground pin - all GND pins must be bonded to minimize impedance and thermal resistance. |
| 7 (GND) | Power Ground | Fourth ground pin - critical for thermal dissipation; solder exposed pad to large copper area. |
| 8 (FB) | Feedback | Not connected in fixed-output version; internally tied to output divider - leave floating or grounded per datasheet. |
| 9–14 (GND) | Power Ground / Exposed Pad | Remaining pins are ground or thermal pad connections; all must be soldered to maximize θJA = 78°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V Output | Eliminates external resistor network, reducing component count, layout area, and potential drift sources. |
| 60V Input Rating | Enables single-stage conversion from 48V industrial buses or automotive cold-crank inputs without pre-regulator. |
| Internal Current Limit | Peak switch current limited to 0.65–1.8A - protects against short-circuit faults while allowing safe inrush into capacitive loads. |
| Thermal Shutdown | Activates at ~150°C junction temperature and auto-recovers - prevents permanent failure under sustained overload. |
| 52 kHz Switching | Optimizes trade-off between inductor size and EMI; compatible with standard off-the-shelf 330 µH inductors (e.g., PE-52627). |
Applications
| Industrial Power Supplies | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Converting 24V or 48V vehicle battery rail to stable 5V for MCU, CAN transceivers, and sensor interfaces in BCMs. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated 5V domain with transient immunity up to 60V. Use Value: Eliminates need for discrete pre-regulator + LDO cascade, reducing board space and improving efficiency to >75% at 0.5A. |
Use Scenario: Generating 5V supply for programmable logic controllers (PLCs) operating in factory environments with noisy 24V DC distribution. IC Role / Device Role / Timing Role: Standalone step-down regulator delivering clean 5V to FPGA configuration circuits and I/O drivers. Use Value: Withstands 60V surges per ISO 7637-2, and thermal shutdown prevents latch-up during ambient temperature excursions to 125°C. |
| Telecom Remote Radio Units | Medical Diagnostic Equipment |
|
Use Scenario: Powering baseband processors and ADCs in outdoor 48V-powered RRUs where space and reliability are critical. IC Role / Device Role / Timing Role: High-input-voltage buck converter supplying tightly regulated 5V with minimal external components. Use Value: 52 kHz frequency avoids interference with RF front-end bands; ±4% output tolerance meets ADC reference stability requirements. |
Use Scenario: Providing isolated 5V for patient-monitoring front-end analog signal chains requiring low-noise, fault-tolerant supply. IC Role / Device Role / Timing Role: Primary DC-DC stage converting 24V medical-grade input to safety-isolated 5V logic rail. Use Value: Internal current limit and thermal shutdown satisfy IEC 60601-1 fault protection requirements without added discrete circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2576HV-5.0 | 0.3A higher output current (3A vs 0.5A); 52 kHz frequency; wider input range (60V); requires same external components. | Better suited for higher-load applications like motor drivers or multi-rail systems; larger thermal footprint required. | Select LM2576HV-5.0 when >0.5A output current or higher efficiency at full load is required; verify inductor saturation rating. |
| TPS54302DDCR | 3A output; 2.5–6V input; 2.2 MHz switching; integrated MOSFETs; no external diode needed; smaller solution size. | Designed for low-input-voltage, high-density applications; incompatible with >6V input; lacks 60V surge tolerance. | Choose TPS54302DDCR for compact 5V supplies from 5V or 3.3V rails; not suitable as drop-in replacement for 48V/60V input use cases. |
Compared with LM2574HVMX-5.0/NOPB, LM2576HV-5.0 offers higher current capacity but requires larger magnetics and PCB area, while TPS54302DDCR delivers superior density and efficiency at low input voltages but cannot replace the 60V input capability essential for industrial and automotive primary regulation.
Availability
LM2574HVMX-5.0/NOPB is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and telecom infrastructure requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM2574HVMX-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 support, documentation, and manufacturing continuity for the SIMPLE SWITCHER™ product line.
The LM2574HVMX-5.0/NOPB belongs to TI's SIMPLE SWITCHER™ family of easy-to-use, high-reliability DC-DC regulators designed specifically for cost-sensitive industrial and automotive power conversion where minimal external components and robust fault protection are critical.
FAQ
What is the maximum input voltage supported by LM2574HVMX-5.0/NOPB?
The LM2574HVMX-5.0/NOPB supports a maximum input voltage of 60V, as specified in its Absolute Maximum Ratings and Operating Ratings. This HV variant is explicitly rated for use with 48V systems and withstands transient surges common in automotive and industrial environments - unlike the standard LM2574 (40V max). Always maintain ≥2V margin below 60V for long-term reliability.
Does LM2574HVMX-5.0/NOPB require external feedback resistors?
No, LM2574HVMX-5.0/NOPB is a fixed-output version with internal resistor divider set to 5.0V. Pin 8 (FB) is not connected internally to the output and must be left unconnected or grounded per TI's recommended layout - no external resistors are needed, reducing BOM cost and layout sensitivity.
What package type is LM2574HVMX-5.0/NOPB supplied in?
LM2574HVMX-5.0/NOPB is supplied in a 14-pin SOIC package (TI package code SOIC-14, National Semiconductor package M14B) with an exposed thermal pad. This surface-mount package supports automated assembly and provides θJA = 78°C/W with adequate PCB copper area, making it suitable for high-reliability industrial applications.
Can LM2574HVMX-5.0/NOPB be used in discontinuous conduction mode?
Yes, LM2574HVMX-5.0/NOPB operates reliably in both continuous and discontinuous conduction modes. At light loads (<~50 mA), inductor current drops to zero each cycle - a normal, stable condition that reduces light-load quiescent current and improves efficiency. No external compensation is required for mode transition.
What is the typical efficiency of LM2574HVMX-5.0/NOPB at full load?
LM2574HVMX-5.0/NOPB achieves 77% typical efficiency at VIN = 12V, VOUT = 5.0V, and IOUT = 0.5A, as measured per the official datasheet test conditions. Efficiency rises to ~88% at higher input voltages (e.g., 15V→5V) due to reduced duty cycle and lower conduction losses in the internal switch and external diode.
LM2574HVMX-5.0/NOPB 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:
- 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
LM2574HVMX-5.0/NOPB FAQ
1.How can I place an order for LM2574HVMX-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2574HVMX-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 LM2574HVMX-5.0/NOPB reliable?
The price and inventory of LM2574HVMX-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 LM2574HVMX-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2574HVMX-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2574HVMX-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2574HVMX-5.0/NOPB?
LM2574HVMX-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2574HVMX-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 LM2574HVMX-5.0/NOPB?
For technical support, including LM2574HVMX-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2574HVMX-5.0/NOPB requirements.
6.How does Aetrix verify that LM2574HVMX-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2574HVMX-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 LM2574HVMX-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2574HVMX-5.0/NOPB?
All LM2574HVMX-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2574HVMX-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 LM2574HVMX-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2574HVMX-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2574HVMX-5.0/NOPB Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
