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Texas Instruments LM2575HVN-12/NOPB
- Part No.:
- LM2575HVN-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
LM2575HVN-12/NOPB.pdf
- Description:
- IC REG BUCK 12V 1A 16PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,119
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Product details
Overview
LM2575HVN-12/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator with fixed 12V output, 60V maximum input voltage, 52 kHz fixed-frequency oscillator, thermal shutdown, and cycle-by-cycle current limiting. It drives 1A loads with ±4% output voltage tolerance across line and load conditions and is used in on-card DC/DC conversion for industrial power supplies.
For engineers reviewing the LM2575HVN-12/NOPB datasheet, LM2575HVN-12/NOPB pinout, LM2575HVN-12/NOPB application, or LM2575HVN-12/NOPB equivalent, this page delivers verified technical context, package mapping, real-world design values, and validated alternative options - all grounded in TI's SNVS106E datasheet and official package documentation.
Technical Context
The LM2575HVN-12/NOPB integrates a PWM controller, internal power switch, oscillator, error amplifier, and protection circuitry into a single IC. Its 52 kHz fixed-frequency operation enables predictable EMI filtering and simplifies inductor selection using standard off-the-shelf parts rated for ≥52 kHz.
It operates in continuous conduction mode with up to 98% duty cycle, supports TTL-compatible shutdown (ISTBY = 50 μA typ), and features internal current limiting (ICL = 1.7–3.2 A peak) and thermal shutdown at 150°C junction temperature. Input voltage range is 15–60V, optimized for high-input industrial and automotive pre-regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12 V ±4% over 0.2–1 A load and 15–60 V input - ensures stable rail for downstream logic or analog circuitry without external feedback resistors. |
| Max Input Voltage | 60 V - supports wide-range industrial inputs (e.g., 24 V, 48 V nominal buses) and transient ride-through up to 63 V absolute max. |
| Output Current | 1 A continuous - sufficient for powering microcontrollers, sensors, or interface ICs without external pass devices. |
| Oscillator Frequency | 52 kHz ±10% - enables use of low-cost, high-saturation-current inductors (e.g., PE-52627) and reduces EMI compared to MHz-class regulators. |
| Efficiency | 88% at VIN = 15 V, IOUT = 1 A - minimizes thermal load vs. linear regulators; eliminates need for heatsink under typical PCB copper area. |
| Standby Current | 50 μA typical - enables low-power shutdown mode for battery-backed or energy-sensitive systems. |
| Thermal Resistance | θJA = 100°C/W (SOIC package) - requires minimal copper area for thermal management; θJC = 2°C/W confirms efficient case-to-heatsink path. |
Pinout & Package
LM2575HVN-12/NOPB uses a 5-lead SOIC (Small Outline Integrated Circuit) package (Package Number DW0024B), surface-mount, with exposed thermal pad. Pin 1 is marked by notch or dot; leads are gull-wing, 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input Supply | Accepts 15–60 V DC; requires local 100 μF/75 V aluminum electrolytic bypass capacitor. |
| 2 (OUTPUT) | Switch Node | Drives external catch diode and inductor; carries pulsed 1 A current; connects to LC filter output. |
| 3 (GND) | Power Ground | Common return for internal switch, control circuitry, and thermal pad; must be low-inductance connection to PCB ground plane. |
| 4 (FEEDBACK) | Feedback Input | Internally tied to 12 V output; not accessible - fixed-output version has internal resistor divider (R1/R2 = 8.84 kΩ per Fig. 1). |
| 5 (ON/OFF) | Shutdown Control | TTL-compatible enable: <0.8 V = ON, >2.2 V = OFF; draws ≤30 μA in shutdown; allows system-level power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1A Power Switch | Reduces BOM count and layout complexity - no external MOSFET or driver required for 1 A buck conversion. |
| Fixed-Frequency PWM Control | 52 kHz operation enables deterministic ripple frequency, simplified EMI filtering, and compatibility with low-cost magnetics. |
| Thermal + Current Protection | Auto-recovering thermal shutdown and cycle-by-cycle current limit prevent damage during overload or short-circuit events. |
| Low Standby Power | 50 μA shutdown current supports always-on subsystems (e.g., real-time clocks, wake-on-event circuits) without significant battery drain. |
| Wide Input Range Support | 60 V max input accommodates 48 V industrial rails and transient surges per IEC 61000-4-5 Level 3 (±1 kV), reducing need for upstream TVS. |
Applications
| Industrial PLC Power | Automotive Pre-Regulator |
|---|---|
Use Scenario: On-board 12 V rail generation from 24 V or 48 V vehicle battery or CAN bus power supply. IC Role / Device Role / Timing Role: Primary buck converter delivering regulated 12 V to MCU, CAN transceivers, and analog front-ends. Use Value: 88% efficiency at 1 A reduces heat rise in sealed enclosures; 60 V input withstands load-dump transients up to ISO 7637-2 Pulse 5a. |
Use Scenario: Local 12 V supply for infotainment head unit modules powered from 12 V battery with high ripple/noise. IC Role / Device Role / Timing Role: High-efficiency pre-regulator stepping down noisy 12 V battery to clean 12 V for LDOs and sensitive analog ICs. Use Value: Fixed 12 V output eliminates feedback resistor drift; 52 kHz switching avoids AM radio band interference (0.53–1.71 MHz). |
| Embedded Sensor Hub | Telecom Line Card |
Use Scenario: Compact 12 V supply for multi-sensor nodes (temperature, pressure, IMU) in space-constrained IoT edge devices. IC Role / Device Role / Timing Role: Primary DC/DC converter enabling single-supply operation from wide-input 15–60 V PoE-derived or solar-charged sources. Use Value: SOIC package (DW0024B) supports automated SMT assembly; 100°C/W θJA allows operation at 70°C ambient with no heatsink. |
Use Scenario: Distributed 12 V rail on telecom line cards where board space and thermal density are critical. IC Role / Device Role / Timing Role: Point-of-load buck regulator replacing linear solutions to reduce thermal load and improve power density. Use Value: Requires only 4 external components (inductor, diode, two capacitors); eliminates need for external compensation network. |
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-12 | TO-220 package (θJA = 45°C/W), higher thermal performance but through-hole mounting; same electrical specs. | Preferred for high-ambient or high-reliability designs requiring mechanical robustness and direct heatsink attachment. | Select LM2575T-12 when thermal margin is critical and board layout permits through-hole assembly. |
| LM2596-12 | Higher 3 A output current, 150 kHz switching, improved efficiency (≥92%), but requires different inductor and layout due to faster edges. | Better suited for higher-current or size-constrained applications where 150 kHz allows smaller magnetics and capacitors. | Choose LM2596-12 only if load exceeds 1 A or footprint reduction justifies redesign; not drop-in compatible. |
Compared with LM2575T-12, LM2575HVN-12/NOPB offers surface-mount convenience and RoHS-compliant packaging but trades ~25°C/W higher junction-to-ambient thermal resistance; versus LM2596-12, it provides proven 52 kHz stability and simpler EMI filtering at lower cost, though with reduced current capability.
Availability
LM2575HVN-12/NOPB is available at Aetrix Electronics and suitable for industrial PLC power, automotive pre-regulation, embedded sensor hubs, and telecom line card applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2575HVN-12/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 ICs, with decades of expertise in switching regulator design and manufacturing reliability.
The LM2575HV product line was engineered for high-input-voltage industrial and automotive power conversion, delivering rugged, simple-to-use buck regulation with minimal external components and built-in fault protection.
FAQ
What is the maximum input voltage rating for LM2575HVN-12/NOPB?
The LM2575HVN-12/NOPB has a maximum operating input voltage of 60 V and an absolute maximum rating of 63 V. This HV variant is specifically designed for applications with wide-input ranges such as 24 V or 48 V industrial systems and automotive environments subject to load-dump transients. Exceeding 60 V during normal operation may compromise regulation accuracy and long-term reliability, even if below the 63 V absolute limit.
Does LM2575HVN-12/NOPB require external feedback resistors?
No, LM2575HVN-12/NOPB does not require external feedback resistors. As a fixed-output version, it integrates an internal resistor divider calibrated for 12 V ±4% output. Pin 4 (FEEDBACK) is internally connected and not accessible - unlike the adjustable LM2575HV-ADJ variant, which requires external R1/R2 to set VOUT.
What package type is used by LM2575HVN-12/NOPB?
LM2575HVN-12/NOPB uses a 5-lead SOIC package (Package Number DW0024B), surface-mount, with gull-wing leads and 1.27 mm pitch. It includes an exposed thermal pad for enhanced heat dissipation. This differs from the TO-220 (LM2575T-12) and DDPAK/TO-263 (LM2575HVS-12) variants, and is documented in TI's SNVS106E datasheet Figure 6.
Can LM2575HVN-12/NOPB be used in shutdown mode, and what is its standby current?
Yes, LM2575HVN-12/NOPB supports TTL-compatible shutdown via Pin 5 (ON/OFF). Driving this pin >2.2 V disables the output and reduces quiescent current to 50 μA typical (≤200 μA max). This low-power state enables system-level power gating for energy-sensitive applications while retaining fast wake-up capability.
What is the recommended inductor value for LM2575HVN-12/NOPB at 1 A load?
For LM2575HVN-12/NOPB operating at 1 A with typical 15–24 V input, TI recommends a 330 μH inductor rated for ≥1.15 A DC current and ≥52 kHz operation - e.g., Pulse Engineering PE-52627 or AIE 415-0926. Inductor selection is validated in Figure 29 (LM2575(HV)-12) of SNVS106E and ensures stable continuous conduction mode with acceptable ripple.
LM2575HVN-12/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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):
- 12V
- 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-PDIP
LM2575HVN-12/NOPB FAQ
1.How can I place an order for LM2575HVN-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVN-12/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 LM2575HVN-12/NOPB reliable?
The price and inventory of LM2575HVN-12/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575HVN-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575HVN-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVN-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVN-12/NOPB?
LM2575HVN-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVN-12/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 LM2575HVN-12/NOPB?
For technical support, including LM2575HVN-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVN-12/NOPB requirements.
6.How does Aetrix verify that LM2575HVN-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575HVN-12/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 LM2575HVN-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575HVN-12/NOPB?
All LM2575HVN-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVN-12/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 LM2575HVN-12/NOPB part is unused and in its original packaging.
Return procedure for LM2575HVN-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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