Texas Instruments TPS54560DDAR

Overview

TPS54560DDAR from Texas Instruments is a 4.5 V to 60 V input, 5 A synchronous step-down DC-DC converter with integrated 92 mΩ high-side MOSFET, Eco-mode™ pulse-skipping for light-load efficiency, and adjustable 100 kHz–2.5 MHz switching frequency. It delivers regulated 0.8 V to 58.8 V output in industrial power systems, automotive accessories, and USB charging ports.

For engineers reviewing the TPS54560DDAR datasheet, TPS54560DDAR pinout, TPS54560DDAR application, or TPS54560DDAR equivalent, key selection criteria include input voltage survival up to 65 V (ISO 7637 load dump), 146 μA no-load quiescent current, internal 0.8 V ±1% reference, thermal shutdown at 176°C, and HSOP PowerPAD™ package thermal performance (θJCbot = 3.6°C/W).

Technical Context

The TPS54560DDAR implements constant-frequency peak current mode control with internal slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its RT/CLK pin supports both resistor-programmed frequency (100–2500 kHz) and external clock synchronization via PLL lock.

It integrates BOOT capacitor recharge logic, enabling near-100% duty cycle operation down to V_OUT ≈ V_IN(min) – 0.3 V, while monitoring BOOT-SW voltage for UVLO protection. Overvoltage transient protection (OVP) disables the high-side FET if V_OUT exceeds 106% of regulation setpoint.

Key Specifications

Pinout & Package

TPS54560DDAR is housed in an 8-terminal HSOP (High-Speed Small Outline Package) with PowerPAD™ thermal pad (4.89 mm × 3.9 mm body). The exposed thermal pad must be soldered to a dedicated PCB copper pour connected to GND for optimal thermal performance (θJCbot = 3.6°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5164DDAR, TPS54560DDAR delivers 3.3× more output current and integrated BOOT recharge for simpler layout; versus TPS54561DDAR, it lacks programmable soft-start but offers identical core regulation performance at lower cost.

Availability

TPS54560DDAR is available at Aetrix Electronics and suitable for industrial motor drives, automotive infotainment systems, and USB charging ports requiring stable component supply, long-term lifecycle support, and ISO 7637-compliant transient robustness.

Supply support for TPS54560DDAR 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 ICs, with decades of expertise in high-reliability power conversion solutions.

The TPS54560DDAR belongs to TI's SWIFT™ family of high-voltage buck regulators, designed specifically for rugged industrial, automotive, and communications power systems demanding wide VIN, high efficiency, and transient resilience.

FAQ

What is the maximum input voltage the TPS54560DDAR can withstand without damage?

The TPS54560DDAR has an absolute maximum input voltage rating of 65 V, allowing it to survive automotive load dump transients per ISO 7637-2 Pulse 5a. Its recommended operating input range is 4.5 V to 60 V. Exceeding 65 V risks permanent damage, even momentarily. Always verify system-level clamping and filtering when deploying TPS54560DDAR in 48 V or higher battery architectures.

How does the TPS54560DDAR achieve high efficiency at light loads?

The TPS54560DDAR achieves high light-load efficiency through Eco-mode™ pulse skipping, which disables the high-side MOSFET when the COMP voltage drops to 600 mV-indicating output current is below the pulse-skip threshold. This reduces switching and gate drive losses, lowering no-load quiescent current to 146 μA. The internal PLL remains active during Eco-mode, preserving synchronization capability.

Can the TPS54560DDAR operate with 100% duty cycle, and what enables this?

Yes, the TPS54560DDAR supports near-100% duty cycle operation via its integrated BOOT capacitor recharge FET. When BOOT-SW voltage falls below 2.1 V, the internal low-side FET pulls SW low to recharge the BOOT capacitor. This eliminates the need for an external bootstrap diode and enables output voltages approaching the minimum input voltage (e.g., 11.8 V out from 12 V in), critical for low-dropout applications.

What is the purpose of the RT/CLK pin on the TPS54560DDAR, and how is it configured?

The RT/CLK pin on the TPS54560DDAR serves dual functions: resistor-based frequency programming (100–2500 kHz) or external clock synchronization. Connecting a resistor from RT/CLK to GND sets f_SW per TI's equation; pulling RT/CLK above 2 V disables the internal oscillator and enables PLL-based sync to an external clock (160–2300 kHz). This flexibility supports EMI reduction and multi-rail timing alignment.

Does the TPS54560DDAR require external components for BOOT capacitor charging?

No, the TPS54560DDAR integrates a BOOT capacitor recharge FET, eliminating the need for an external bootstrap diode. A 0.1 µF X7R/X5R ceramic capacitor between BOOT and SW is sufficient. This integration simplifies layout, reduces BOM count, improves reliability, and enables high-duty-cycle operation without additional discrete parts-unlike many competing controllers requiring external diodes or charge pumps.