onsemi LM2575TV-012

Overview

LM2575TV-012 from onsemi is a monolithic step-down (buck) switching regulator IC delivering 1.0 A output current with fixed 12 V output, 52 kHz internal oscillator frequency, ±4% output voltage tolerance over line and load, and wide 4.75 V to 40 V input range. It integrates a 1.0 A switch, thermal shutdown, cycle-by-cycle current limiting, and TTL-compatible ON/OFF control - used in industrial power supplies, battery chargers, and on-card DC-DC conversion.

For engineers reviewing the LM2575TV-012 datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 1.0 A output capability, fixed 12 V output without external feedback resistors, TO-220-5 package with heatsink-connected ground pin, and compatibility with standard off-the-shelf 330 µH inductors and Schottky catch diodes.

Technical Context

The LM2575TV-012 implements a voltage-mode controlled buck converter architecture with a fixed-frequency 52 kHz oscillator, internal 1.23 V bandgap reference, and error amplifier driving a 1.0 A NPN switch. Its cycle-by-cycle current limit and thermal shutdown provide fault protection without external circuitry.

It operates in continuous conduction mode with typical efficiency of 88% at 15 V input and 1.0 A load, and features 80 µA standby quiescent current when the ON/OFF pin is pulled high. The device requires only four external components: input capacitor, output capacitor, inductor, and catch diode - eliminating need for feedback resistor networks due to its fixed-output configuration.

Key Specifications

Pinout & Package

LM2575TV-012 uses the TO-220-5 package (Case 314B), with Pin 3 (GND) electrically connected to the metal heatsink tab for low-thermal-resistance mounting. The package is moisture sensitivity level (MSL) 1 - suitable for standard reflow and through-hole assembly without baking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down regulator applications.

Compared with LM2575T-12, LM2575TV-012 offers superior thermal conduction via integrated heatsink-ground connection; versus MP1584EN-LF-Z, it trades higher integration and lower BOM count for lower output current and fixed voltage - making it optimal for cost-sensitive, thermally demanding 12 V applications.

Availability

LM2575TV-012 is available at Aetrix Electronics and suitable for industrial power supplies, battery charger front-ends, and on-card DC-DC conversion requiring stable component supply, long-lifecycle support, and proven reliability in harsh environments.

Supply support for LM2575TV-012 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient power management, analog, and sensor technologies for automotive, industrial, and cloud infrastructure markets.

The LM2575 series was designed as an easy-to-use, low-component-count buck regulator family targeting cost-sensitive, thermally constrained applications where simplicity and ruggedness outweigh ultra-high efficiency or programmability.

FAQ

What is the maximum input voltage rating for LM2575TV-012?

The absolute maximum input voltage for LM2575TV-012 is 45 V, but the recommended operating maximum is 40 V per the datasheet's Operating Ratings. Exceeding 40 V may trigger internal protection or degrade long-term reliability. For sustained operation, keep Vin ≤40 V with appropriate derating margin - especially at elevated temperatures - to ensure stable 12 V output and avoid overstressing the internal switch.

Does LM2575TV-012 require external feedback resistors to set output voltage?

No, LM2575TV-012 does not require external feedback resistors. As a fixed-output variant, its 12 V regulation is implemented internally via a precision resistor divider network. Pin 4 (Feedback) is internally connected and must remain unconnected or grounded per datasheet guidance - adding external resistors would disrupt regulation and potentially cause malfunction.

Can LM2575TV-012 be used in a negative-output (inverting) configuration?

Yes, LM2575TV-012 can be configured as a positive-to-negative buck-boost converter to generate −12 V. The datasheet explicitly lists "Positive to Negative Converters (Buck−Boost)" under Applications. This requires repositioning the inductor and diode per Figure 1 application schematic for inverting topologies - output polarity reverses, but regulation accuracy and current capability remain consistent with the fixed 12 V forward configuration.

What is the thermal resistance (junction-to-ambient) for LM2575TV-012 in TO-220-5 package?

The thermal resistance junction-to-ambient (R_θJA) for LM2575TV-012 in Case 314B (TO-220-5) is 65°C/W under standard JEDEC 2S2P test conditions. Actual performance depends heavily on PCB copper area, heatsink attachment, and airflow. With proper 2–4 in² copper pour connected to Pin 3 (GND/heatsink tab), R_θJA can be reduced to ~35–45°C/W in typical industrial layouts.

Is LM2575TV-012 RoHS-compliant and halogen-free?

Yes, LM2575TV-012 is a Pb-free device meeting RoHS Directive 2011/65/EU requirements, and it is also halogen-free per onsemi's product compliance documentation. The "Pb-Free Devices" note appears explicitly on page 1 of the datasheet, and the device carries MSL 1 rating - confirming suitability for standard lead-free reflow processes without moisture sensitivity concerns.