My Inquiry
My Account
Texas Instruments LM2575MX-5.0/NOPB
- Part No.:
- LM2575MX-5.0/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LM2575MX-5.0/NOPB.pdf
- Description:
- IC REG BUCK 5V 1A 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:244
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2575MX-5.0/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator with fixed 5.0V output, 52 kHz internal oscillator, ±4% output voltage tolerance over line/load/temperature, 40V max input voltage, and integrated thermal shutdown and cycle-by-cycle current limiting. It replaces linear regulators in mid-power DC-DC conversion for industrial power supplies and embedded systems.
For engineers reviewing the LM2575MX-5.0/NOPB datasheet, LM2575MX-5.0/NOPB pinout, LM2575MX-5.0/NOPB application, or LM2575MX-5.0/NOPB equivalent, key selection criteria include its 1A continuous output capability, TO-263 (DDPAK) package thermal performance (θJA = 37°C/W with 1 in² copper), 50 μA standby current under TTL shutdown, and compatibility with standard off-the-shelf inductors.
Technical Context
The LM2575MX-5.0/NOPB implements a fixed-frequency (52 kHz) pulse-width modulation (PWM) buck topology with internal NPN switch, feedback comparator, oscillator, and protection circuitry. Its control loop uses internal frequency compensation and senses output voltage via an internal 1.23V reference.
It operates in continuous conduction mode (CCM) across its rated 8–40V input range and delivers regulated 5.0V ±4% at up to 1A load. Protection includes thermal shutdown triggered at 150°C junction temperature and peak current limiting set at 1.7–3.2A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% over 8–40V input, 0.2–1A load, −40°C to +125°C junction |
| Max Output Current | 1A continuous - supports mid-power rails without external pass devices |
| Switching Frequency | 52 kHz fixed - enables use of low-cost, high-saturation-current inductors (e.g., 330 µH) |
| Input Voltage Range | 4.75V to 40V - compatible with 5V, 12V, and 24V industrial bus inputs |
| Efficiency | 77% at VIN = 12V, IOUT = 1A - reduces heat sink requirements vs. linear regulators |
| Standby Current | 50 µA typical with ON/OFF pin pulled high - enables low-power sleep modes |
| Thermal Resistance | θJA = 37°C/W (with 1 in² PCB copper) - allows 1A operation without external heatsink |
Pinout & Package
LM2575MX-5.0/NOPB is housed in a 5-lead DDPAK/TO-263 surface-mount package (package code KTT0005B), featuring exposed thermal pad for enhanced PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: Input | Unregulated DC input supply | Accepts 4.75–40V; requires local 47–100 µF aluminum electrolytic bypass |
| 2: Output | Regulated 5.0V switching node | Drives external catch diode and output filter; high di/dt path requiring short layout |
| 3: Ground | Power and signal reference | Must connect directly to thermal pad and low-impedance ground plane |
| 4: Feedback | Output voltage sense input | Internally tied to 5.0V output; not accessible - fixed-output version has no external resistor network |
| 5: ON/OFF | TTL-compatible enable/disable control | Logic high (>2.2V) enables regulation; logic low (<0.8V) disables switch and reduces IQ to 50 µA |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1A NPN switch | Eliminates need for external transistor, simplifying BOM and layout |
| Internal frequency compensation | Enables stable operation with only 4 external components: input cap, output cap, inductor, catch diode |
| Cycle-by-cycle current limit | Protects against short-circuit and overload without latch-up; supports hiccup-mode recovery |
| TTL-compatible ON/OFF pin | Allows system-level power sequencing and low-quiescent standby without external logic |
| Thermal shutdown with hysteresis | Shuts down at 150°C junction and auto-restarts after cooldown - prevents permanent damage |
Applications
| Industrial Power Supply | Embedded System Rail Generator |
|---|---|
|
Use Scenario: Generating 5V/1A from 12V or 24V factory bus for PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Primary step-down regulator providing isolated, efficient, and thermally robust 5V rail. Use Value: Replaces linear regulators to eliminate heat sinks and reduce board area by >60% while maintaining ±4% regulation. |
Use Scenario: On-board 5V supply for microcontroller, memory, and peripheral ICs in ruggedized edge devices. IC Role / Device Role / Timing Role: Fixed-output buck converter delivering clean, well-regulated 5V with fast transient response. Use Value: Delivers 1A at 77% efficiency with 37°C/W thermal resistance - sustains full load on compact 2-layer PCBs. |
| Efficient Pre-Regulator | Positive-to-Negative Converter |
|
Use Scenario: Pre-stepping 24V down to 5V before LDO post-regulation for noise-sensitive analog circuits. IC Role / Device Role / Timing Role: High-efficiency front-end stage reducing power loss ahead of low-noise linear regulation. Use Value: Cuts pre-regulator dissipation by ~70% vs. linear solution - extends thermal margin for downstream LDOs. |
Use Scenario: Configured in inverting buck-boost topology to generate −5V from +12V for op-amp bias rails. IC Role / Device Role / Timing Role: Core switching controller repurposed with external inductor/diode/capacitor for polarity inversion. Use Value: Leverages same 52 kHz oscillator and current-limit architecture - avoids need for dedicated inverting IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2575T-5.0 | TO-220 through-hole package; θJA = 45°C/W (with 4 in² copper); same electrical specs | Preferred for prototyping, manual assembly, or legacy through-hole designs | Select when mechanical mounting or hand-soldering is required; verify thermal margin with reduced copper area |
| MP1584EN-LF-Z | 3A output, 1.5 MHz switching, adjustable output, smaller SOIC-8 package; requires external feedback resistors | Better suited for space-constrained, higher-current, or programmable-output designs | Choose for higher density or scalability; note different compensation and layout requirements |
Compared with LM2575T-5.0, the LM2575MX-5.0/NOPB offers superior thermal performance in surface-mount form; versus MP1584EN-LF-Z, it trades higher integration and lower EMI for simpler design, proven reliability, and fixed 5V output with zero external programming components.
Availability
LM2575MX-5.0/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, embedded system rail generation, and efficient pre-regulator applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2575MX-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 is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in switching regulator design and manufacturing.
The LM2575MX-5.0/NOPB belongs to TI's SIMPLE SWITCHER® family - engineered for ease-of-use, minimal external component count, and robust operation in industrial and commercial power conversion applications.
FAQ
What is the maximum input voltage rating for the LM2575MX-5.0/NOPB?
The LM2575MX-5.0/NOPB has a maximum input voltage rating of 40V, with absolute maximum supply voltage specified at 45V. Operation above 40V risks exceeding safe operating area limits and may trigger internal protection or cause permanent damage. For 60V input applications, the LM2575HV-5.0 variant must be used instead.
Does the LM2575MX-5.0/NOPB require external feedback resistors to set its output voltage?
No, the LM2575MX-5.0/NOPB does not require external feedback resistors. It is a fixed-output version with the 5.0V regulation internally configured; pins 4 (Feedback) and 5 (ON/OFF) are functionally independent, and the feedback network is fully integrated - eliminating resistor selection, placement, and tolerance errors.
What is the thermal performance of the LM2575MX-5.0/NOPB in its DDPAK package?
The LM2575MX-5.0/NOPB in the DDPAK/TO-263 package achieves θJA = 37°C/W when mounted on a PCB with 1 square inch of copper connected to the thermal pad. This enables full 1A output at ambient temperatures up to +85°C without an external heatsink, assuming proper thermal land pattern and solder coverage per TI's layout guidelines.
Can the LM2575MX-5.0/NOPB be used in a buck-boost (inverting) configuration?
Yes, the LM2575MX-5.0/NOPB can be configured as a positive-to-negative converter using a standard buck-boost topology. The datasheet explicitly lists "Positive to Negative Converter (Buck-Boost)" as an application, and the internal switch and control architecture support this reconfiguration with appropriate external inductor, diode, and capacitor placement.
What is the minimum number of external components required for basic operation of the LM2575MX-5.0/NOPB?
The LM2575MX-5.0/NOPB requires only four external components for functional operation: an input capacitor (≥47 µF), output capacitor (≥330 µF), power inductor (e.g., 330 µH), and catch diode (e.g., Schottky SR103). No external compensation or feedback resistors are needed due to its fixed-output, internally compensated design.
LM2575MX-5.0/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 24-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):
- 40V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- 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:
- 24-SOIC
LM2575MX-5.0/NOPB FAQ
1.How can I place an order for LM2575MX-5.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575MX-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 LM2575MX-5.0/NOPB reliable?
The price and inventory of LM2575MX-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 LM2575MX-5.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575MX-5.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575MX-5.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575MX-5.0/NOPB?
LM2575MX-5.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575MX-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 LM2575MX-5.0/NOPB?
For technical support, including LM2575MX-5.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575MX-5.0/NOPB requirements.
6.How does Aetrix verify that LM2575MX-5.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575MX-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 LM2575MX-5.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575MX-5.0/NOPB?
All LM2575MX-5.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575MX-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 LM2575MX-5.0/NOPB part is unused and in its original packaging.
Return procedure for LM2575MX-5.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2575MX-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…
