Texas Instruments TPS54824RNVR

Overview

TPS54824RNVR from Texas Instruments is an 8-A synchronous step-down DC/DC converter in a 3.5-mm × 3.5-mm HotRod™ QFN package, featuring integrated 14.1-mΩ high-side and 6.1-mΩ low-side MOSFETs, 0.6-V ±0.85% reference voltage, and 200-kHz to 1.6-MHz adjustable switching frequency. It delivers regulated 1.5-V output from 12-V input in telecom power rails with hiccup current limiting and pre-bias startup capability.

For engineers reviewing the TPS54824RNVR datasheet, TPS54824RNVR pinout, TPS54824RNVR application, or TPS54824RNVR equivalent, key selection criteria include its 4.5-V to 17-V input range, 8-A continuous output, thermal shutdown at 170°C, PGOOD monitoring with 91–106% VREF window, and RT/CLK synchronization support for system-level timing coordination.

Technical Context

The TPS54824RNVR implements peak current mode control with internal slope compensation to ensure stable CCM operation across all loads and prevent subharmonic oscillation. Its dual MOSFET integration eliminates external high-side drive complexity while enabling 100% duty cycle operation when BOOT-SW voltage exceeds 2.2 V.

Control architecture includes a dedicated EN pin with 1.26-V rising threshold and 50-mV hysteresis for adjustable UVLO, SS/TRK pin supporting both soft-start (via external capacitor) and supply tracking, and COMP pin providing direct access to error amplifier output for custom loop compensation.

Key Specifications

Pinout & Package

TPS54824RNVR uses the RNV (18-pin VQFN-HR) package, 3.5 mm × 3.5 mm, with exposed thermal pad (PGND-connected) for enhanced thermal performance. Pin 1 is BOOT; pins 2 and 11 are VIN; pins 3,4,5,8,9,10 are PGND; pins 6 and 7 are SW; pin 12 is AGND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with MP8770GQ-Z and ISL8208MIRZ, the TPS54824RNVR offers superior timing flexibility via RT/CLK synchronization and tighter 0.6-V reference (±0.85%), making it optimal for systems requiring deterministic switching alignment and high-accuracy core rails-without the overhead of digital control or larger packaging.

Availability

TPS54824RNVR is available at Aetrix Electronics and suitable for telecom infrastructure, server power delivery, and medical imaging equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS54824RNVR 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 and embedded processing technologies, with decades of expertise in power management ICs.

The TPS54824RNVR belongs to TI's SWIFT™ synchronous buck converter family, engineered for high-density, high-efficiency point-of-load regulation in space-constrained telecom, enterprise, and industrial systems.

FAQ

What is the maximum input voltage rating for the TPS54824RNVR?

The TPS54824RNVR has an absolute maximum input voltage rating of 19 V on the VIN pin, with recommended operating range from 4.5 V to 17 V. Exceeding 19 V risks permanent damage, and operation above 17 V may compromise reliability or thermal performance. The device includes internal VIN UVLO with 4.3-V rising threshold and 200-mV hysteresis to ensure safe startup and shutdown behavior.

How does the TPS54824RNVR support power supply sequencing in multi-rail systems?

The TPS54824RNVR supports sequencing via its SS/TRK pin: connecting an external resistor divider to this pin allows the output to track another supply voltage during startup, while a capacitor enables adjustable soft-start timing. This ensures monotonic, controlled ramp-up across dependent rails-critical for FPGAs and processors-without requiring external sequencers. The TPS54824RNVR also features PGOOD with programmable thresholds to trigger downstream enable signals.

Can the TPS54824RNVR operate with a 100% duty cycle, and under what conditions?

Yes, the TPS54824RNVR can operate at 100% duty cycle as long as the BOOT-to-SW voltage remains above the internal 2.2-V UVLO threshold. This condition is maintained by the integrated bootstrap recharge circuit, which pulls SW low to refresh the BOOT capacitor when needed. Sustained 100% operation is validated down to 0.6-V output and is especially useful in low-dropout scenarios like 5-V-to-3.3-V conversion.

What thermal metrics apply to the TPS54824RNVR in its RNV package?

The TPS54824RNVR in the 3.5-mm × 3.5-mm RNV package has a junction-to-board thermal resistance (Θ_JB) of 18.8°C/W and junction-to-case (bottom) resistance (Θ_JCbot) of 1.2°C/W-indicating highly efficient heat transfer to the PCB. On a standard 2-layer evaluation board, Θ_JA is 25°C/W; JEDEC-standard Θ_JA is 57.1°C/W. These values assume proper thermal pad soldering and 6+ thermal vias to inner ground planes.

Does the TPS54824RNVR provide overvoltage protection, and how does it behave during a fault?

Yes, the TPS54824RNVR includes output overvoltage protection (OVP) that disables the high-side MOSFET when the FB pin voltage exceeds 108% of the 0.6-V reference. The device remains latched off until FB falls below 106% VREF, preventing destructive rail overshoot during transient faults such as feedback resistor failure or load dump. This OVP operates independently of PGOOD and complements the hiccup current limit for comprehensive fault coverage.