Texas Instruments TPS54560BDDAR

Overview

TPS54560BDDAR 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, 0.8-V ±1% internal reference, and adjustable 100-kHz to 2.5-MHz switching frequency. It delivers regulated 3.3-V or 5-V output in industrial power supplies, USB charging ports, and 12-/24-/48-V systems.

For engineers reviewing the TPS54560BDDAR datasheet, TPS54560BDDAR pinout, TPS54560BDDAR application, or TPS54560BDDAR equivalent, key selection criteria include input voltage range (4.5–60 V), continuous output current (5 A), thermal performance in HSOIC PowerPAD™, Eco-mode quiescent current (146 µA), and RT/CLK synchronization capability.

Technical Context

The TPS54560BDDAR implements current-mode control with slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its integrated BOOT recharge FET enables near-100% duty-cycle operation for low-dropout regulation, while the PLL-based RT/CLK pin supports both resistor-programmed frequency and external clock synchronization.

It features cycle-by-cycle overcurrent protection, frequency foldback during overload, thermal shutdown at 176°C, and overvoltage transient protection that disables the high-side MOSFET until output falls below 106% of setpoint. The error amplifier provides 350 µA/V transconductance and supports standard Type II/III compensation via COMP-to-GND network.

Key Specifications

Pinout & Package

TPS54560BDDAR is housed in an 8-pin HSOIC package with exposed PowerPAD™ thermal pad (4.89 mm × 3.90 mm body size). The PowerPAD must be soldered to a thermally robust PCB copper area connected to GND for optimal thermal performance (RθJB = 23.4°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5164DDAR and MPQ4363GJ-AEC1-P, the TPS54560BDDAR uniquely combines 5-A capability, integrated BOOT recharge, and Eco-mode in a single HSOIC package-making it optimal for space-constrained industrial converters needing ultra-low standby power and high-duty-cycle operation.

Availability

TPS54560BDDAR is available at Aetrix Electronics and suitable for industrial motor control, USB charging infrastructure, and 48-V telecom power systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for TPS54560BDDAR 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 DC/DC conversion.

The TPS54560BDDAR belongs to TI's SWIFT™ family of high-voltage buck regulators, designed specifically for industrial, automotive, and communications applications demanding wide input range, high efficiency, and robust thermal performance.

FAQ

What is the minimum input voltage required for TPS54560BDDAR to regulate a 5-V output?

The minimum input voltage depends on output current, inductor DCR, diode forward voltage, and MOSFET RDS(on). For a 5-V/5-A output with typical components, Equation 1 in the datasheet calculates ~6.2 V minimum at full load. At light loads, dropout can approach 5.1 V due to the integrated BOOT recharge FET enabling near-100% duty cycle. Always verify with worst-case component tolerances and temperature effects in your design.

Does TPS54560BDDAR require an external bootstrap diode?

No, the TPS54560BDDAR integrates a BOOT recharge FET, eliminating the need for an external bootstrap diode. A 0.1-µF ceramic capacitor between BOOT and SW is sufficient. This reduces BOM count, improves reliability, and enables high-duty-cycle operation-unlike many competing controllers that mandate external diodes for >90% duty cycles.

How does Eco-mode™ operate in TPS54560BDDAR, and what triggers entry/exit?

TPS54560BDDAR enters Eco-mode™ when output voltage is regulated and peak switch current falls below the pulse-skipping threshold (corresponding to ~600 mV on COMP pin). It exits Eco-mode when output droop causes the error amplifier to raise COMP above 600 mV. Entry point varies with inductor value-e.g., ~25 mA for a 10-µH inductor. The internal PLL remains active, preserving synchronization capability even in pulse-skip mode.

Can TPS54560BDDAR synchronize to an external clock, and what are the valid frequency and voltage levels?

Yes, TPS54560BDDAR synchronizes to an external clock applied to the RT/CLK pin. Valid input clock frequency is 160 kHz to 2.3 MHz. The pin accepts TTL- or CMOS-level signals: logic high must exceed 1.55 V, logic low must stay below 1.2 V. Clock edges must meet minimum pulse width (15 ns) and jitter specifications per datasheet Section 6.6 to ensure stable PLL lock.

What thermal design guidelines apply to TPS54560BDDAR in the HSOIC PowerPAD™ package?

For reliable 5-A operation, the exposed PowerPAD™ must be soldered to ≥250 mm² of 2-oz copper connected to GND. Use ≥4 thermal vias (0.3-mm diameter) under the pad, filled or plated, connecting to inner/ground planes. Keep high-current traces short and wide. With this layout, RθJA drops to ~42°C/W, allowing full load at +85°C ambient. Derate linearly above 125°C junction temperature per datasheet thermal curves.