Texas Instruments LM2592HVSX-5.0

Overview

LM2592HVSX-5.0 from Texas Instruments is a monolithic 150 kHz step-down (buck) switching voltage regulator IC delivering a fixed 5.0 V output at up to 2 A load current, with ±4% output voltage tolerance over line and load, input voltage range up to 60 V, and integrated thermal shutdown and current limiting. It serves as a primary DC-DC power conversion stage in industrial power supplies, automotive auxiliary rails, and distributed power architectures.

For engineers reviewing the LM2592HVSX-5.0 datasheet, LM2592HVSX-5.0 pinout, LM2592HVSX-5.0 application, or LM2592HVSX-5.0 equivalent, key selection considerations include its 60 V max input rating, 2 A guaranteed output capability, 150 kHz fixed-frequency operation enabling compact filter design, ON/OFF control pin interface, and DDPAK-5 surface-mount package thermal performance.

Technical Context

The LM2592HVSX-5.0 integrates a PWM controller, power switch, internal frequency compensation, and protection circuitry into a single IC. Its 150 kHz oscillator enables use of smaller inductors and capacitors than lower-frequency buck regulators, while the two-stage current limit and thermal shutdown ensure robust fault handling without external supervision circuitry.

It operates in continuous conduction mode with a maximum duty cycle of 100%, supports input voltages from 7 V to 60 V for the 5.0 V version, and achieves 81% efficiency at 12 V input and 2 A load. The feedback loop is internally connected to the output pin, eliminating external resistor dividers required in adjustable versions.

Key Specifications

Pinout & Package

LM2592HVSX-5.0 is housed in a thermally enhanced 5-pin DDPAK (TO-263) surface-mount package with exposed thermal pad, optimized for PCB copper area heat spreading. Thermal resistance θ_JA ranges from 20°C/W (double-sided board, 16 in² copper) to 50°C/W (single-sided, 0.5 in² copper).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM2592HVSX-5.0, LM2596S-5.0 offers higher current headroom but reduced high-voltage robustness, while MP2307DN-LF-Z trades input voltage range and thermal performance for footprint reduction and higher switching frequency - making LM2592HVSX-5.0 optimal for ruggedized 24/48 V industrial and automotive applications requiring proven reliability at elevated input stress.

Availability

LM2592HVSX-5.0 is available at Aetrix Electronics and suitable for industrial PLC power supplies, automotive body control modules, and telecom remote radio units requiring stable component supply with long-term manufacturability and extended temperature support.

Supply support for LM2592HVSX-5.0 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 LM2592HV series was designed specifically for robust, low-component-count buck regulation in harsh environments - targeting industrial automation, transportation, and infrastructure applications where wide input range and integrated protection are critical.

FAQ

What is the minimum input voltage required for stable 5 V output from the LM2592HVSX-5.0?

The LM2592HVSX-5.0 requires a minimum input voltage of 7 V to maintain regulation at full 2 A load, as specified in the Electrical Characteristics table for LM2592HV-5.0. Below this threshold, dropout occurs and output voltage drops linearly with input. At light loads (<200 mA), operation may sustain down to ~5.5 V, but this is outside guaranteed specifications and not recommended for production designs using LM2592HVSX-5.0.

Does the LM2592HVSX-5.0 require external compensation components?

No, the LM2592HVSX-5.0 includes internal frequency compensation, so no external capacitors or resistors are needed to stabilize the feedback loop. This is confirmed in the datasheet FEATURES section ("internal frequency compensation†") and the BLOCK DIAGRAM showing integrated compensation circuitry - a key simplification versus adjustable regulators like LM2592HV-ADJ which require external networks.

Can the LM2592HVSX-5.0 be used with an input voltage above 60 V?

No - the Absolute Maximum Rating for +VIN is 63 V, but the guaranteed operating range for LM2592HVSX-5.0 is strictly 7 V to 60 V. Exceeding 60 V violates the device's operational specification and risks immediate failure or latent degradation. For >60 V inputs, a pre-regulator stage or alternative HV buck controller (e.g., LM5164) must be used upstream of LM2592HVSX-5.0.

How does the ON/OFF pin function on the LM2592HVSX-5.0?

The ON/OFF pin (Pin 5) controls enable/disable state: driving it to ≤0.6 V (or leaving it floating) enables regulation, while pulling it to ≥2.0 V places LM2592HVSX-5.0 in low-power shutdown (IQ ≈ 90 µA). The threshold is typically 1.3 V, and the pin tolerates up to +25 V - enabling direct interface with 3.3 V/5 V logic or open-collector drivers without level shifting.

What package type is used for the LM2592HVSX-5.0, and how is thermal performance achieved?

The LM2592HVSX-5.0 uses the 5-pin DDPAK (TO-263) package with an exposed thermal pad. Thermal performance depends on PCB copper area: θ_JA ranges from 20°C/W (double-sided board with 16 in² copper) to 50°C/W (single-sided, 0.5 in²). Full thermal pad soldering to inner-layer copper planes is mandatory to achieve rated 2 A output without derating - per TI's Layout Guidelines in the datasheet.