Texas Instruments TPS54560DDA

Overview

TPS54560DDA 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 output down to 0.8 V in industrial power systems, automotive accessories, and USB charging ports.

For engineers reviewing the TPS54560DDA datasheet, TPS54560DDA pinout, TPS54560DDA application, or TPS54560DDA 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-8 PowerPAD™ package with θJCbot = 3.6°C/W.

Technical Context

The TPS54560DDA 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 recharge FET and BOOT UVLO (2.1 V threshold) enabling near-100% duty-cycle operation for low dropout; EN pin provides adjustable undervoltage lockout with 1.2 V threshold and 325 mV hysteresis, while COMP pin serves as error amplifier output and PWM comparator input with 350 μs transconductance.

Key Specifications

Pinout & Package

TPS54560DDA uses an 8-terminal thermally enhanced HSOP package with exposed PowerPAD™ thermal pad (electrically connected to GND). The package measures 4.89 mm × 3.9 mm and features optimized thermal performance for high-current buck conversion.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5164QDDARQ1 and MPQ4361GJ-A, the TPS54560DDA uniquely combines 5 A capability, Eco-mode™ light-load efficiency, integrated BOOT recharge, and HSOP-8 thermal performance-making it optimal for industrial and automotive 12–48 V systems demanding reliability and low standby power.

Availability

TPS54560DDA 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 TPS54560DDA 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and automotive/industrial qualification.

The TPS54560DDA belongs to TI's high-voltage buck converter product line, designed specifically for rugged 12–48 V power systems in automotive, industrial automation, and communications infrastructure where input transients and thermal constraints dominate design requirements.

FAQ

What is the maximum input voltage the TPS54560DDA can withstand without damage?

The TPS54560DDA has an absolute maximum input voltage rating of 65 V, allowing it to survive ISO 7637 load dump transients common in automotive 12 V and 24 V systems. Its recommended operating input range is 4.5 V to 60 V. Exceeding 65 V may cause permanent damage, and operation above 60 V is outside specified conditions. The TPS54560DDA's robust input stage ensures reliability in harsh electrical environments where voltage spikes occur.

How does the TPS54560DDA achieve high efficiency at light loads?

The TPS54560DDA achieves high light-load efficiency through Eco-mode™ pulse skipping, which disables switching when the output is regulated and the peak switch current falls below the 600 mV COMP 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. This behavior is confirmed across temperature and input voltage ranges in the TPS54560DDA datasheet Figure 13 and Section 7.3.3.

Can the TPS54560DDA operate with 100% duty cycle, and what enables this capability?

Yes, the TPS54560DDA supports near-100% duty cycle operation enabled by its integrated BOOT recharge FET and BOOT UVLO monitoring. When BOOT-SW voltage drops below 2.1 V, the internal low-side FET pulls SW low to recharge the BOOT capacitor. This allows regulation even when VIN is only slightly higher than VOUT - critical for low-dropout applications like 12 V to 11.5 V conversion. The feature is documented in Section 7.3.4 and Figure 19 of the TPS54560DDA datasheet.

What package type and thermal characteristics define the TPS54560DDA's PCB layout requirements?

The TPS54560DDA uses an HSOP-8 package with PowerPAD™ (4.89 mm × 3.9 mm), where the exposed thermal pad must be soldered to a large GND copper area for optimal heat dissipation. Its θJCbot is 3.6°C/W, meaning most heat flows through the bottom pad into the PCB. Layout requires ≥6 thermal vias under the pad, connected to inner-layer GND planes. This thermal architecture is specified in Section 6.4 and Figure 40 of the TPS54560DDA datasheet.

Does the TPS54560DDA support external clock synchronization, and how is it configured?

Yes, the TPS54560DDA supports external clock synchronization via the RT/CLK pin. When pulled above 2 V, the internal amplifier disables and the pin becomes a high-impedance clock input synchronized to the falling edge of an external signal (160–2300 kHz range). If the external clock stops, the device automatically reverts to resistor-programmed mode. This dual-mode capability is detailed in Section 5 (Pin Functions) and Section 7.1 of the TPS54560DDA datasheet.