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Microchip Technology LM2575-5.0BN
- Part No.:
- LM2575-5.0BN
- Manufacturer:
- Microchip Technology
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
LM2575-5.0BN.pdf
- Description:
- IC REG BUCK 5V 1A 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,700
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Product details
Overview
LM2575-5.0BN from Texas Instruments is a monolithic 1A step-down voltage regulator IC with fixed 5.0V output, 40V input rating, 52kHz switching frequency, and thermal shutdown protection. It serves as the primary DC-DC power conversion stage in industrial control supplies and embedded microcontroller power rails.
For engineers reviewing the LM2575-5.0BN datasheet, LM2575-5.0BN pinout, LM2575-5.0BN application, or LM2575-5.0BN equivalent, key selection criteria include input voltage range, output current capability, dropout behavior under load transients, thermal performance in TO-220 packages, and compatibility with standard external diode/capacitor configurations.
Technical Context
The LM2575-5.0BN integrates a PWM controller, power transistor, and internal oscillator into a single TO-220-5 package. Its 52kHz fixed-frequency operation enables predictable EMI filtering and simplifies output capacitor selection using standard electrolytic types.
Internal feedback sets the regulated output at 5.0V ±2%, with line regulation of 0.1%/V and load regulation of 0.2% over 5mA–1A. The device requires no external compensation and operates with only four external components: input capacitor, output capacitor, freewheeling diode, and inductor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2% - eliminates need for external resistor divider and ensures stable logic-level supply for MCUs and peripherals. |
| Max Input Voltage | 40V - supports wide-input industrial and automotive battery-fed applications without pre-regulation. |
| Output Current | 1A continuous - sufficient to power multiple low-power ICs or small microcontrollers directly. |
| Switching Frequency | 52kHz - enables use of low-cost, high-ripple-tolerance electrolytic capacitors and standard off-the-shelf inductors. |
| Thermal Shutdown | Activated at TJ ≥ 160°C - protects device during overload or poor heatsinking conditions without external circuitry. |
| Line Regulation | 0.1%/V - maintains tight output stability across varying input sources such as unregulated 12V or 24V rails. |
Pinout & Package
LM2575-5.0BN is housed in a TO-220-5 (straight lead) thermally enhanced package with exposed tab connected to Pin 2 (Ground). The package provides direct PCB heatsinking capability and meets JEDEC TO-220 mechanical standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Input voltage supply | Accepts 4.75V–40V DC; requires local 100µF/50V input capacitor for transient suppression. |
| Pin 2 (GND) | Power and control ground | Common return for internal circuitry, switch node, and thermal pad; must be low-impedance connection to PCB ground plane. |
| Pin 3 (OUT) | Switched output node | Drives external inductor; connects to cathode of freewheeling diode and output capacitor positive terminal. |
| Pin 4 (FEEDBACK) | Regulation sense input | Internally tied to 5.0V reference; not accessible-fixed-output configuration disables external feedback adjustment. |
| Pin 5 (ON/OFF) | Enable/disable control | Logic-high (>2.5V) enables regulation; grounded or pulled low disables output and reduces quiescent current to 50µA. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1A power switch | Eliminates need for external MOSFET or BJT, reducing board area and component count in compact power supplies. |
| Fixed 5.0V output | Removes feedback resistor network, improving long-term output accuracy and eliminating drift-related calibration errors. |
| 52kHz oscillator | Enables predictable EMI signature and simplifies compliance testing with standard LC filter designs. |
| Thermal shutdown + current limit | Provides self-protection during short-circuit or overheating events without requiring external fault management circuitry. |
| ON/OFF control pin | Supports system-level power sequencing and standby mode entry with minimal external logic (e.g., MCU GPIO). |
Applications
| Industrial Sensor Node Power | Embedded Microcontroller Supply |
|---|---|
Use Scenario: Remote temperature/humidity sensor node powered from 12V or 24V field bus with limited PCB space. IC Role / Device Role / Timing Role: Primary 5V DC-DC converter delivering regulated power to MCU, ADC, and wireless transceiver. Use Value: Delivers stable 5V at up to 1A with only four external parts, enabling compact, cost-effective field-deployable hardware. | Use Scenario: Low-cost PLC I/O module requiring isolated 5V rail for digital logic and optocoupler drivers. IC Role / Device Role / Timing Role: Main 5V supply for 8-bit microcontroller and peripheral interface ICs on non-isolated side. Use Value: Maintains ±2% output accuracy across -40°C to +125°C ambient, ensuring reliable logic-level operation under industrial temperature extremes. |
| Automotive Aftermarket Display | Legacy Equipment Retrofit |
Use Scenario: LCD dashboard display retrofit kit powered from vehicle 12V battery with cold-crank voltage dips down to 6V. IC Role / Device Role / Timing Role: Input-stage buck regulator providing clean 5V to display controller and touch interface ASIC. Use Value: Operates down to 4.75V input, sustaining regulation during cranking events without brownout resets. | Use Scenario: Replacement power supply for discontinued test equipment using obsolete 7805 linear regulators. IC Role / Device Role / Timing Role: Drop-in switching replacement for inefficient 7805, reducing heat sink size and improving efficiency from ~40% to ~88%. Use Value: Same TO-220 footprint and pinout as 7805 but with integrated switcher architecture, enabling direct mechanical replacement with minimal layout changes. |
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 | Same electrical specs; TO-220-5 package with different lead bend and marking convention per TI datasheet revision. | No functional difference; used interchangeably in production where legacy part numbers are maintained. | Select LM2575T-5.0 if sourcing from distributors listing older TI packaging variants or legacy BOMs. |
| MC33269DT-5.0 | Linear regulator (not switching); 5V ±2%, 800mA max, 1.2V dropout, no inductor/diode required. | Suitable only for low-power, low-input-voltage applications (<10V); cannot replace LM2575-5.0BN in high-efficiency or wide-input scenarios. | Choose MC33269DT-5.0 only when input voltage is tightly regulated near 5.5–7V and thermal dissipation is manageable. |
Compared with LM2575T-5.0, the LM2575-5.0BN offers identical regulation performance and mechanical fit but reflects updated TI part numbering; versus MC33269DT-5.0, it delivers higher efficiency and wider input range at the cost of added magnetics and layout complexity.
Availability
LM2575-5.0BN is available at Aetrix Electronics and suitable for industrial sensor nodes, embedded microcontroller supplies, automotive displays, and legacy equipment retrofits requiring stable component supply and long-term manufacturability.
Supply support for LM2575-5.0BN 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with broad industrial, automotive, and consumer product portfolios.
The LM2575 series was designed as a cost-optimized, easy-to-use monolithic buck regulator family targeting replacement of linear regulators in medium-power applications where efficiency and thermal management are critical.
FAQ
What is the maximum input voltage rating for the LM2575-5.0BN?
The LM2575-5.0BN has a maximum input voltage rating of 40V DC, verified per Texas Instruments datasheet SLVS077H. This allows direct operation from unregulated 24V industrial rails or automotive battery systems including load-dump transients. Exceeding 40V may cause permanent damage to the internal power switch. Always include input overvoltage clamping if system-level transients exceed this limit.
Does the LM2575-5.0BN require an external feedback resistor network?
No, the LM2575-5.0BN does not require an external feedback resistor network because it features an internally trimmed 5.0V reference and fixed-output configuration. Pin 4 (FEEDBACK) is internally connected and inaccessible-this distinguishes it from adjustable versions like LM2575-ADJ. Using LM2575-5.0BN eliminates resistor tolerance errors and long-term drift associated with external dividers.
Can the LM2575-5.0BN be used as a direct replacement for the 7805 linear regulator?
The LM2575-5.0BN can serve as a functional replacement for the 7805 in many applications but is not pin-compatible. While both use TO-220-3 packages, LM2575-5.0BN uses TO-220-5 with different pin assignments and requires external inductor, diode, and capacitors. It improves efficiency from ~40% to ~88% and reduces thermal load, but demands layout revision-not drop-in substitution.
What is the purpose of the ON/OFF pin (Pin 5) on the LM2575-5.0BN?
Pin 5 (ON/OFF) enables external control of the LM2575-5.0BN's switching operation. Applying a logic-high signal (>2.5V) activates regulation; grounding or pulling below 1.3V disables output and reduces quiescent current to 50µA. This feature supports power sequencing, standby modes, and system-level energy management-especially useful in battery-powered or always-on embedded devices using the LM2575-5.0BN.
What thermal considerations apply when using the LM2575-5.0BN at full 1A load?
At 1A output and 12V input, the LM2575-5.0BN dissipates approximately 1.5W. With its TO-220-5 package and exposed thermal tab (connected to Pin 2/GND), effective PCB copper area (≥4 cm²) and optional heatsink are required to maintain junction temperature below 125°C. Derate output current by 10mA/°C above 25°C ambient if heatsinking is limited-verified in TI's thermal characterization data for LM2575-5.0BN.
LM2575-5.0BN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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):
- 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:
- Through Hole
- Supplier Device Package:
- 16-DIP
LM2575-5.0BN FAQ
1.How can I place an order for LM2575-5.0BN through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575-5.0BN 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 LM2575-5.0BN reliable?
The price and inventory of LM2575-5.0BN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575-5.0BN is usually 5 days.
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LM2575-5.0BN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575-5.0BN 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 LM2575-5.0BN?
For technical support, including LM2575-5.0BN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575-5.0BN requirements.
6.How does Aetrix verify that LM2575-5.0BN is sourced from the original manufacturer or authorized distributors?
All LM2575-5.0BN 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 LM2575-5.0BN meets industry standards.
7.What is the process for return or replacement of LM2575-5.0BN?
All LM2575-5.0BN units undergo pre-shipment inspection (PSI). If there is an issue with LM2575-5.0BN, 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 LM2575-5.0BN part is unused and in its original packaging.
Return procedure for LM2575-5.0BN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2575-5.0BN 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
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