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Texas Instruments LM2575HVT-12/NOPB
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- Part No.:
- LM2575HVT-12/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- TO-220-5
- Datasheet:
-
LM2575HVT-12/NOPB.pdf
- Description:
- IC REG BUCK 12V 1A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:157
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Product details
Overview
LM2575HVT-12/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator in TO-220 package, delivering a fixed 12V output with ±4% tolerance across 15V–60V input range, 88% peak efficiency at 15VIN/1A, and integrated thermal shutdown, cycle-by-cycle current limiting, and TTL-compatible shutdown control - deployed in industrial power supplies, battery-powered instrumentation, and distributed DC-DC conversion.
For engineers reviewing the LM2575HVT-12/NOPB datasheet, LM2575HVT-12/NOPB pinout, LM2575HVT-12/NOPB application, or LM2575HVT-12/NOPB equivalent, key selection considerations include its 60V maximum input rating, 52 kHz fixed-frequency operation, 1.23V internal feedback reference, 50 μA standby current, and compatibility with standard off-the-shelf inductors and Schottky catch diodes.
Technical Context
The LM2575HVT-12/NOPB implements a self-contained buck converter architecture with an integrated 3.0A peak-current bipolar switch, fixed 52 kHz oscillator, and internal frequency compensation - eliminating external timing components. Its HV variant extends input capability to 60V while maintaining identical control logic, feedback structure, and protection mechanisms as the standard LM2575 series.
Operation relies on voltage-mode PWM control using a precision 1.23V bandgap reference and error amplifier driving the oscillator comparator. The ON/OFF pin enables TTL-level shutdown with 2.2VHI threshold and sub-10 μA leakage, supporting low-power sequencing without external level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 12V ±4% over 0.2–1A load and 15–60V input - ensures stable rail for microcontrollers, sensors, and analog circuitry without external resistive divider. |
| Input Voltage Range | 4.75V to 60V - supports wide-range industrial inputs, 48V telecom systems, and unregulated battery stacks up to 4S LiFePO₄. |
| Max Output Current | 1A continuous - sufficient for powering multiple ICs or small subsystems without external current boosting. |
| Switching Frequency | 52 kHz ±10% - enables use of low-cost, high-saturation-current inductors (e.g., 330 µH) and reduces EMI filtering complexity vs. MHz-range converters. |
| Efficiency | 88% at 15VIN/1A/12VOUT - minimizes thermal load and eliminates need for heatsink under typical convection-cooled conditions. |
| Standby Current | 50 µA typical with ON/OFF pin high - enables ultra-low-power sleep modes in battery-backed systems. |
| Thermal Shutdown | Activates at ~150°C junction temperature - protects device during overload, short-circuit, or inadequate PCB copper area. |
Pinout & Package
LM2575HVT-12/NOPB uses a 5-lead TO-220 package (package code NDH0005D) with exposed tab electrically connected to Pin 2 (Output). Mounting requires isolation if output ground differs from heatsink potential.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: Input | Voltage supply input | Accepts 4.75–60V DC; requires ≥100 µF/75V bulk capacitor placed within 1 cm for stable operation. |
| 2: Output | Regulated 12V switching node | Drives inductor and output capacitor; tab is internally tied to this pin - isolate heatsink unless referenced to output ground. |
| 3: Ground | Power and signal reference | Must be low-impedance connection to input and output capacitor grounds; single-point star grounding recommended. |
| 4: Feedback | Output voltage sensing | Internally tied to 12V output - no external resistor network required for fixed-version operation. |
| 5: ON/OFF | TTL-compatible enable control | Pull ≥2.2V to enable; ≤0.8V to enter 50 µA standby - supports microcontroller GPIO direct drive without buffering. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 3.0A peak-current switch | Eliminates external MOSFET and gate driver - reduces BOM count and layout sensitivity. |
| Fixed 52 kHz oscillator | Enables predictable EMI profile and simplifies filter design using standardized inductor families. |
| Cycle-by-cycle current limiting | Prevents inductor saturation and MOSFET failure during transient overloads or output shorts. |
| Thermal shutdown with hysteresis | Auto-restarts after cooldown - avoids latch-up behavior and supports fault-tolerant system recovery. |
| Requires only 4 external components | Input cap, output cap, inductor, catch diode - accelerates prototyping and reduces layout iteration cycles. |
Applications
| Industrial Power Supply | Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: Converting 24–48V DC bus to stable 12V for PLC I/O modules and field transmitters. IC Role / Device Role / Timing Role: Primary step-down regulator providing isolated, ripple-controlled 12V rail with built-in fault protection. Use Value: 60V input rating accommodates 48V nominal systems with surge margin; 88% efficiency reduces thermal stress in sealed enclosures. |
Use Scenario: Regulating 3S Li-ion (9–12.6V) or 4S LiFePO₄ (10–14.4V) battery packs to 12V for portable test equipment. IC Role / Device Role / Timing Role: High-efficiency buck converter enabling extended runtime and low quiescent current during sleep states. Use Value: 50 µA standby current preserves battery life; wide VIN range avoids brownout during discharge. |
| Distributed DC-DC Conversion | Positive-to-Negative Converter |
|
Use Scenario: Local regulation on PCBs where centralized 24V or 48V backplane powers multiple subsystems. IC Role / Device Role / Timing Role: Point-of-load regulator minimizing IR drop and noise coupling from shared supply rails. Use Value: TO-220 package allows direct heatsinking to chassis; fixed 12V output eliminates trimming resistors and calibration steps. |
Use Scenario: Generating –12V rail from +12V source using buck-boost topology with external inductor and diode. IC Role / Device Role / Timing Role: Switching controller repurposed in inverting configuration per TI Application Note SLVA001. Use Value: Internal 52 kHz oscillator and current limit ensure stable inversion; 1.23V reference enables precise negative rail accuracy. |
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 | 40V max input (vs. 60V), same pinout, identical 12V output spec and thermal limits. | Suitable for ≤36V systems only; not rated for 48V telecom or industrial bus applications. | Select when input never exceeds 40V and cost is prioritized over HV margin. |
| LM2596T-12 | Higher 3A output current, 150 kHz switching, adjustable version only - requires external feedback resistors even for 12V. | Supports higher load currents but increases component count and layout complexity for fixed 12V use. | Choose only if >1A output or smaller inductor size is required; otherwise LM2575HVT-12/NOPB offers simpler implementation. |
Compared with LM2575T-12, LM2575HVT-12/NOPB adds 20V input headroom critical for 48V systems; versus LM2596T-12, it trades higher current capability for lower EMI, proven reliability, and true fixed-output simplicity - making it optimal for cost-sensitive, thermally constrained 1A applications.
Availability
LM2575HVT-12/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, battery-powered instrumentation, and distributed DC-DC conversion requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM2575HVT-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 technologies, with decades of expertise in high-reliability power conversion ICs.
The LM2575HV product line was designed specifically for robust, low-component-count DC-DC conversion in harsh environments - targeting industrial controls, telecom infrastructure, and automotive auxiliary systems where wide-input-voltage tolerance and integrated protection are essential.
FAQ
What is the maximum input voltage rating for LM2575HVT-12/NOPB?
The LM2575HVT-12/NOPB supports a maximum input voltage of 60V, confirmed in the Absolute Maximum Ratings table of the official SNVS106E datasheet. This HV rating distinguishes it from the standard LM2575T-12 (40V max) and enables reliable operation in 48V industrial and telecom systems with transient margin. Exceeding 60V risks permanent damage to the internal bipolar switch.
Does LM2575HVT-12/NOPB require external feedback resistors to set the 12V output?
No, LM2575HVT-12/NOPB is a fixed-output variant - its 12V regulation is implemented internally using laser-trimmed resistors tied to the 1.23V reference. Pin 4 (Feedback) is internally connected to the output, eliminating the need for external R1/R2 dividers. This simplifies layout and improves long-term stability compared to adjustable versions.
What thermal management is required for LM2575HVT-12/NOPB at full 1A load?
At 1A output with 25V input, LM2575HVT-12/NOPB dissipates approximately 1.3W. In a TO-220 package with 4 in² copper area, θJA is 45°C/W - resulting in ~60°C junction rise above ambient. A modest heatsink or chassis-mount is recommended for continuous 1A operation above 50°C ambient; derating to 0.8A is advised without heatsinking in enclosed spaces.
Can LM2575HVT-12/NOPB be used in a buck-boost (inverting) configuration?
Yes, LM2575HVT-12/NOPB can be configured as a positive-to-negative converter per TI Application Note SLVA001. The internal 1.23V reference and 52 kHz oscillator remain fully functional in this topology. However, the output polarity is inverted, and external inductor/diode placement must follow the inverting schematic - the device itself does not change function.
What is the standby current consumption of LM2575HVT-12/NOPB in shutdown mode?
LM2575HVT-12/NOPB draws 50 µA typical (max 200 µA) quiescent current when the ON/OFF pin is pulled low (<0.8V), placing the IC in low-power standby. This value is verified across temperature in the Electrical Characteristics table and enables multi-day battery operation in sleep-mode instrumentation without significant drain.
LM2575HVT-12/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- TO-220-5
- Packaging:
- Tube
- 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):
- 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:
- TO-220-5
LM2575HVT-12/NOPB FAQ
1.How can I place an order for LM2575HVT-12/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVT-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 LM2575HVT-12/NOPB reliable?
The price and inventory of LM2575HVT-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 LM2575HVT-12/NOPB is usually 5 days.
3.What payment methods are accepted for LM2575HVT-12/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVT-12/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVT-12/NOPB?
LM2575HVT-12/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVT-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 LM2575HVT-12/NOPB?
For technical support, including LM2575HVT-12/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVT-12/NOPB requirements.
6.How does Aetrix verify that LM2575HVT-12/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2575HVT-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 LM2575HVT-12/NOPB meets industry standards.
7.What is the process for return or replacement of LM2575HVT-12/NOPB?
All LM2575HVT-12/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVT-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 LM2575HVT-12/NOPB part is unused and in its original packaging.
Return procedure for LM2575HVT-12/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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