Texas Instruments LM2575HVM-5.0/NOPB

Overview

LM2575HVM-5.0/NOPB from Texas Instruments is a monolithic 1A step-down (buck) switching voltage regulator in DDPAK/TO-263 package, delivering a fixed 5.0V ±4% output across 8–60V input range with 77% efficiency at 12V_IN/1A_OUT. It integrates oscillator, PWM controller, and 60V-rated power switch for industrial power conversion, battery-powered systems, and distributed supply rails.

For engineers reviewing the LM2575HVM-5.0/NOPB datasheet, LM2575HVM-5.0/NOPB pinout, LM2575HVM-5.0/NOPB application, or LM2575HVM-5.0/NOPB equivalent, key selection factors include its 60V max input rating, 52 kHz fixed-frequency operation, TTL shutdown capability, thermal shutdown protection, and compatibility with standard off-the-shelf inductors - all critical for ruggedized DC-DC design.

Technical Context

The LM2575HVM-5.0/NOPB implements a current-mode PWM buck topology with internal 52 kHz oscillator and cycle-by-cycle current limiting. Its high-voltage 60V input rating enables direct operation from 48V telecom or 36V automotive battery rails without pre-regulation.

It features a dedicated ON/OFF control pin with 2.2V logic-high threshold and 50 μA standby current, enabling low-power sequencing. The feedback loop uses a precision 1.23V reference with <±1% initial tolerance, supporting stable regulation under line/load transients up to 1A.

Key Specifications

Pinout & Package

LM2575HVM-5.0/NOPB is housed in a 5-lead DDPAK/TO-263 surface-mount package (package code KTT0005B), featuring an exposed thermal pad for enhanced heat dissipation. Pin 1 is Input, Pin 2 is Output, Pin 3 is Ground, Pin 4 is Feedback (internally tied to 5V output), and Pin 5 is ON/OFF control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2575T-5.0, LM2575HVM-5.0/NOPB offers 50% higher input voltage margin and superior thermal performance on PCB; versus LM2596S-5.0, it trades higher switching frequency and current for proven reliability, simpler compensation, and lower EMI in noise-sensitive environments.

Availability

LM2575HVM-5.0/NOPB is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and telecom remote units requiring stable component supply with long-term lifecycle assurance.

Supply support for LM2575HVM-5.0/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 switching regulator innovation.

The LM2575HVM-5.0/NOPB belongs to TI's SIMPLE SWITCHER® family - designed specifically for robust, easy-to-implement DC-DC conversion in harsh environments where reliability, wide input range, and minimal external components are essential.

FAQ

What is the maximum input voltage rating for LM2575HVM-5.0/NOPB?

The LM2575HVM-5.0/NOPB supports a maximum input voltage of 60V, confirmed in the Absolute Maximum Ratings table of the official datasheet (SNVS106E). This HV designation distinguishes it from standard LM2575 variants rated for 40V, making LM2575HVM-5.0/NOPB suitable for 48V industrial and automotive applications where transient overvoltage tolerance is critical. Operation above 60V risks permanent device damage.

Does LM2575HVM-5.0/NOPB require external feedback resistors to set the 5V output?

No, LM2575HVM-5.0/NOPB does not require external feedback resistors. As a fixed-output variant, its feedback pin (Pin 4) is internally connected to the 5.0V output node. This eliminates resistor matching errors and layout sensitivity, ensuring ±4% output accuracy across temperature and load without external components - a key differentiator from the adjustable LM2575HV-ADJ version.

What package type is used for LM2575HVM-5.0/NOPB, and how does it impact thermal performance?

LM2575HVM-5.0/NOPB uses the 5-lead DDPAK/TO-263 surface-mount package (TI package code KTT0005B) with an exposed thermal pad. When mounted on ≥1 in² of PCB copper, its junction-to-ambient thermal resistance is 37°C/W - significantly lower than the TO-220 version's 65°C/W. This enables 1A continuous operation without a heatsink in most industrial ambient conditions, improving power density and assembly reliability.

Can LM2575HVM-5.0/NOPB be synchronized to an external clock?

No, LM2575HVM-5.0/NOPB cannot be synchronized to an external clock. It features a fixed internal 52 kHz oscillator with no synchronization pin or frequency adjustment capability. This design prioritizes simplicity and stability over programmability - unlike more advanced regulators such as the LM2596 or TPS5430, which offer sync inputs. For noise-sensitive applications, the fixed frequency allows predictable EMI filter design.

What protection features are integrated into LM2575HVM-5.0/NOPB?

LM2575HVM-5.0/NOPB integrates four core protections: (1) cycle-by-cycle current limiting (trip threshold ~2.2A peak), (2) thermal shutdown at ~150°C junction temperature, (3) TTL-compatible ON/OFF control with 50 μA standby current, and (4) output short-circuit foldback via oscillator frequency reduction to ~18 kHz. These features ensure robust operation in real-world faults without requiring external protection circuitry - a key advantage over discrete buck controller + MOSFET solutions.