My Inquiry
My Account
Texas Instruments LM2575HVN-ADJ
- Part No.:
- LM2575HVN-ADJ
- Manufacturer:
- Texas Instruments
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
LM2575HVN-ADJ.pdf
- Description:
- IC REG BUCK ADJ 1A 16PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,067
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2575HVN-ADJ from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator with adjustable output (1.23V to 37V), 52 kHz fixed-frequency internal oscillator, and wide 40V–60V input range. It integrates switch, error amplifier, oscillator, and thermal/current protection - designed for high-efficiency DC/DC conversion in industrial power supplies and embedded systems requiring compact, heat-sink-free regulation.
For engineers reviewing the LM2575HVN-ADJ datasheet, LM2575HVN-ADJ pinout, LM2575HVN-ADJ application, or LM2575HVN-ADJ equivalent, key selection criteria include its HV-rated 60V max input, ±4% output voltage tolerance over line/load, 1.23V feedback reference, TTL shutdown capability (50 μA standby), and compatibility with standard off-the-shelf inductors - all critical for robust offline or automotive pre-regulator designs.
Technical Context
The LM2575HVN-ADJ implements a current-mode buck topology with cycle-by-cycle current limiting and thermal shutdown. Its internal 52 kHz oscillator enables predictable EMI behavior and simplifies filter design using standard 330–470 μH inductors.
Feedback is taken from the ADJ pin referencing an internal 1.23V bandgap, allowing precise output programming via two external resistors. The ON/OFF pin supports TTL-compatible shutdown with 50 μA typical standby current and logic-level thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1 A continuous - supports full-load operation without external current boosting. |
| Input Voltage Range | 40 V to 60 V - rated for high-input applications including 48 V telecom or industrial bus rails. |
| Output Voltage Range | 1.23 V to 37 V - set externally via resistor divider; 1.23 V feedback reference enables precision adjustment. |
| Oscillator Frequency | 52 kHz ±10% - fixed frequency ensures stable loop compensation and predictable ripple spectrum. |
| Efficiency | 77% at VIN = 12 V, VOUT = 5 V, IOUT = 1 A - reduces thermal load vs. linear regulators in medium-power applications. |
| Quiescent Current | 5 mA operating / 50 μA standby - enables low-power sleep modes via TTL shutdown control. |
| Thermal Protection | Internal thermal shutdown - prevents damage during overload or poor heatsinking conditions. |
Pinout & Package
LM2575HVN-ADJ is housed in a 5-lead TO-220 package (package code NDH0005D) with exposed tab for thermal conduction. Pin 3 (Tab) is electrically connected to Pin 2 (Output) and must be isolated from chassis ground unless output is referenced to system ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Supply | Accepts 40–60 V DC; requires local 47–100 μF input capacitor for stability and transient suppression. |
| 2 (OUT) | Switched Output | Drives external inductor; connects to cathode of catch diode and output capacitor; tied to Tab (Pin 3). |
| 3 (Tab) | Thermal Pad / Output | Electrically connected to Pin 2; provides primary thermal path - must be soldered to copper pour for θJA = 45°C/W. |
| 4 (FEEDBACK) | Voltage Sense Input | Monitors resistor divider from VOUT; compares to 1.23 V internal reference to regulate output. |
| 5 (ON/OFF) | Digital Enable Control | TTL-compatible shutdown: <0.8 V = ON, >2.2 V = OFF; draws only 50 μA in standby mode. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Switch | Internal NPN transistor with 0.9 V saturation voltage - eliminates need for external MOSFET driver or gate circuitry. |
| Fixed-Frequency Operation | 52 kHz oscillator - enables consistent EMI filtering and predictable inductor sizing across designs. |
| Current Limit Protection | Peak current limit of 2.2 A (min 1.7 A) - prevents catastrophic failure during short-circuit or startup overload. |
| Wide Input Compatibility | 60 V absolute maximum input - supports unregulated 48 V, 36 V, or rectified AC-derived rails without external pre-regulation. |
| Standard Inductor Support | Optimized for common 330–470 μH off-the-shelf inductors - reduces BOM count and accelerates prototyping. |
Applications
| Industrial Power Supplies | Automotive Pre-Regulators |
|---|---|
Use Scenario: Converting 48 V vehicle battery or telecom bus to 5 V/12 V for microcontrollers and sensors. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, regulated DC output with fault protection. Use Value: Eliminates need for bulky linear regulators and external heat sinks while maintaining ±4% output accuracy under varying load and temperature. |
Use Scenario: Stepping down 24 V or 36 V nominal vehicle supply to stable 3.3 V or 5 V for infotainment ECUs. IC Role / Device Role / Timing Role: High-voltage input buck controller managing transient-heavy automotive environments. Use Value: Withstands load dump surges up to 60 V and delivers 1 A output with integrated thermal/current limiting - no external protection required. |
| On-Card DC/DC Conversion | Positive-to-Negative Converter |
Use Scenario: Generating local 3.3 V or 5 V rails on PCBs where space and thermal management are constrained. IC Role / Device Role / Timing Role: Compact, self-contained buck regulator replacing multi-component discrete solutions. Use Value: Requires only four external components (inductor, diode, two capacitors) - reduces layout complexity and improves reliability. |
Use Scenario: Configured in inverting buck-boost topology to generate −5 V or −12 V from positive input. IC Role / Device Role / Timing Role: Switching controller repurposed as inverting regulator via modified external component arrangement. Use Value: Leverages same 52 kHz oscillator and current-limit architecture to deliver negative outputs without dedicated IC - validated in TI application notes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2576HV-ADJ | Higher 3 A output current rating; 52 kHz frequency; wider 4–60 V input range; requires larger inductor. | Supports higher load currents and lower minimum input voltages - suitable for 2–3 A applications with tighter input headroom. | Select LM2576HV-ADJ when >1 A output or sub-40 V start-up is required; not drop-in due to different current sense and thermal design. |
| TPS5430DDAR | 3 A synchronous buck; 500 kHz switching; integrated high-side/low-side FETs; requires external compensation. | Delivers higher efficiency (>90%) and smaller solution size but demands more complex layout and loop tuning. | Choose TPS5430DDAR for space-constrained, high-efficiency designs where board area and thermal performance outweigh simplicity. |
Compared with LM2575HVN-ADJ, LM2576HV-ADJ offers higher current capacity at the cost of increased board area and thermal mass, while TPS5430DDAR trades design simplicity for significantly improved efficiency and frequency - making LM2575HVN-ADJ optimal for cost-sensitive, thermally tolerant 1 A applications needing minimal external parts.
Availability
LM2575HVN-ADJ is available at Aetrix Electronics and suitable for industrial power supplies, automotive pre-regulators, on-card DC/DC conversion, and positive-to-negative converter circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2575HVN-ADJ 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 LM2575 series belongs to TI's SIMPLE SWITCHER® portfolio - engineered for ease-of-use in non-isolated buck applications where minimal external components, rugged HV operation, and proven field reliability are prioritized over ultra-high efficiency or miniaturization.
FAQ
What is the maximum input voltage rating for LM2575HVN-ADJ?
The LM2575HVN-ADJ has a maximum input voltage rating of 60 V, confirmed in the Absolute Maximum Ratings table of the official datasheet (SNVS106E). This HV rating distinguishes it from standard LM2575 variants (45 V max) and enables direct use with 48 V industrial or automotive bus systems without external clamping or pre-regulation.
How is the output voltage set on LM2575HVN-ADJ?
The LM2575HVN-ADJ uses an external resistor divider between VOUT and GND, with the midpoint connected to the FEEDBACK (Pin 4) terminal. The internal 1.23 V reference is compared to this divided voltage, enabling output adjustment from 1.23 V to 37 V. For example, R1 = 2.0 kΩ and R2 = 6.12 kΩ yields 5 V output per Figure 26 in the datasheet.
Does LM2575HVN-ADJ require a heat sink in 1 A operation?
LM2575HVN-ADJ can operate at 1 A without an external heat sink when mounted on a PCB with ≥4 in² copper area around the TO-220 tab (θJA = 45°C/W), per datasheet thermal data. At full load and 60 V input, junction temperature remains within 125°C limit under 25°C ambient - verified by TI's thermal models and typical performance curves.
What type of catch diode is recommended for LM2575HVN-ADJ?
A Schottky diode with ≥3 A average current rating and ≥40 V reverse voltage is recommended for LM2575HVN-ADJ at full 1 A load, per TI design guidelines. Examples include MBR340 (40 V, 3 A) or SR103 (30 V, 1 A for lighter loads). Fast recovery diodes like 1N5818 are acceptable but less efficient due to higher forward voltage.
Is LM2575HVN-ADJ pin-compatible with other LM2575 variants?
Yes - LM2575HVN-ADJ shares identical 5-lead TO-220 pinout (IN, OUT, Tab, FEEDBACK, ON/OFF) and footprint with LM2575N-ADJ and LM2575T-ADJ. However, the HV version requires attention to input capacitor voltage rating (≥63 V) and thermal layout due to higher power dissipation at elevated input voltages.
LM2575HVN-ADJ 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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 57V
- 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-ADJ FAQ
1.How can I place an order for LM2575HVN-ADJ through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2575HVN-ADJ 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-ADJ reliable?
The price and inventory of LM2575HVN-ADJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2575HVN-ADJ is usually 5 days.
3.What payment methods are accepted for LM2575HVN-ADJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2575HVN-ADJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2575HVN-ADJ?
LM2575HVN-ADJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2575HVN-ADJ 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-ADJ?
For technical support, including LM2575HVN-ADJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2575HVN-ADJ requirements.
6.How does Aetrix verify that LM2575HVN-ADJ is sourced from the original manufacturer or authorized distributors?
All LM2575HVN-ADJ 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-ADJ meets industry standards.
7.What is the process for return or replacement of LM2575HVN-ADJ?
All LM2575HVN-ADJ units undergo pre-shipment inspection (PSI). If there is an issue with LM2575HVN-ADJ, 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-ADJ part is unused and in its original packaging.
Return procedure for LM2575HVN-ADJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2575HVN-ADJ 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…
