Texas Instruments TPS54360BQDDARQ1

Overview

TPS54360BQDDARQ1 from Texas Instruments is an automotive-grade 60 V input, 3.5 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 operates from –40°C to 150°C junction temperature and supports load dump survival up to 65 V per ISO 7637 - ideal for automotive power rails feeding ADAS cameras or USB charging ports.

For engineers reviewing the TPS54360BQDDARQ1 datasheet, TPS54360BQDDARQ1 pinout, TPS54360BQDDARQ1 application, or TPS54360BQDDARQ1 equivalent, key selection considerations include its AEC-Q100 Grade 1 qualification, BOOT-recharge FET enabling >99% duty cycle, 0.8 V ±1% internal reference, RT/CLK synchronization capability, and HSOP-8 PowerPAD™ thermal package for high-power density automotive designs.

Technical Context

The TPS54360BQDDARQ1 implements constant-frequency current-mode control with slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its transconductance error amplifier (350 µS) drives the COMP pin for external Type II/III compensation, while internal soft-start (2.1 ms at 500 kHz) controls output ramp rate and suppresses inrush.

It features dual-mode RT/CLK pin operation: resistor-to-ground sets frequency (e.g., 200 kΩ → 500 kHz), while external clock edges above 1.55 V trigger PLL synchronization. Overvoltage transient protection (OVP) disables the high-side MOSFET if VOUT exceeds 106% of regulation, and frequency foldback reduces fSW during overcurrent or startup to maintain loop stability.

Key Specifications

Pinout & Package

TPS54360BQDDARQ1 is housed in an 8-pin HSOP (DDA) package with exposed thermal pad (4.89 mm × 3.90 mm), requiring PCB solder connection of the PowerPAD™ to GND for thermal performance (θJA = 42°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5164QDDARQ1, TPS54360BQDDARQ1 delivers 3.5× more output current and supports adjustable frequency for EMI tuning; compared with TPS54560BQDDARQ1, it offers lower thermal stress and cost at 3.5 A, making it optimal for mid-power automotive subsystems.

Availability

TPS54360BQDDARQ1 is available at Aetrix Electronics and suitable for automotive ADAS, USB charging ports, industrial motor drives, and 48 V telecom power systems requiring stable component supply across extended temperature and long product lifecycles.

Supply support for TPS54360BQDDARQ1 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 automotive ICs, with decades of automotive qualification expertise and broad power management portfolio.

TPS54360BQDDARQ1 belongs to TI's automotive-qualified DC-DC buck converter family designed specifically for harsh-environment vehicle subsystems - emphasizing AEC-Q100 compliance, load dump resilience, and wide-junction-temperature operation.

FAQ

What is the maximum input voltage the TPS54360BQDDARQ1 can withstand during load dump events?

The TPS54360BQDDARQ1 is rated for 65 V absolute maximum input voltage per ISO 7637-2 Pulse 5a, enabling direct connection to automotive 12 V and 24 V battery rails without external TVS clamping. This rating is validated across its full operating temperature range and forms part of its AEC-Q100 Grade 1 qualification. The device sustains this stress without latch-up or parametric shift, provided PCB layout follows TI's thermal and grounding guidelines. TPS54360BQDDARQ1 integrates internal protection to prevent damage during transient overvoltage conditions typical in vehicle electrical systems.

Does the TPS54360BQDDARQ1 require an external bootstrap diode?

No, the TPS54360BQDDARQ1 integrates a dedicated BOOT recharge FET that automatically refreshes the BOOT-to-SW capacitor during the low-side conduction phase, eliminating the need for an external bootstrap diode. This feature enables reliable operation at >99% duty cycle - essential for ultra-low dropout applications like 12 V → 11.5 V post-regulation. The internal FET is sized to support standard 0.1 µF X7R/X5R ceramic capacitors and remains active up to 24 V VOUT, deactivating only above that threshold to minimize losses. TPS54360BQDDARQ1 thus reduces BOM count and improves layout simplicity versus discrete bootstrap solutions.

How does Eco-mode™ operate in the TPS54360BQDDARQ1, and what load current triggers it?

Eco-mode™ in the TPS54360BQDDARQ1 activates when the peak switch current falls below a threshold corresponding to 600 mV on the COMP pin - typically occurring at light loads (~24 mA for a 10 µH inductor). During Eco-mode, the COMP pin is clamped at 600 mV and switching pauses until output droop causes the error amplifier to lift COMP above threshold. This reduces no-load quiescent current to 146 µA and eliminates switching losses. The transition is seamless and preserves regulation accuracy. TPS54360BQDDARQ1 maintains PLL synchronization even in Eco-mode, ensuring deterministic timing for noise-sensitive applications.

Can the TPS54360BQDDARQ1 be synchronized to an external clock, and what are the timing requirements?

Yes, the TPS54360BQDDARQ1 supports external clock synchronization via its RT/CLK pin: when driven above 1.55 V (with 15 ns minimum pulse width), the internal PLL engages and locks within 78 µs. The device accepts clock frequencies from 160 kHz to 2.3 MHz and maintains lock during brief clock interruptions. Synchronization reduces beat frequencies and EMI peaks in multi-rail systems. The RT/CLK pin automatically reverts to resistor-programmed mode if clock edges cease. TPS54360BQDDARQ1's dual-mode pin eliminates need for external mode-select circuitry - simplifying design while supporting both flexible frequency tuning and deterministic timing.

What thermal performance can be expected from the TPS54360BQDDARQ1 in HSOP-8 PowerPAD™ package?

In standard JEDEC 2-layer board conditions, the TPS54360BQDDARQ1 achieves θJA = 42°C/W, allowing ~3.5 A continuous output at 25°C ambient with proper PCB copper pour under the PowerPAD™. Junction-to-board thermal resistance (θJB) is 23.4°C/W, confirming effective heat transfer to the PCB. For automotive under-hood use (85°C ambient), derating to ~2.5 A is recommended to maintain TJ ≤ 150°C. Thermal shutdown activates at 176°C with 12°C hysteresis, providing robust overtemperature protection. TPS54360BQDDARQ1's thermal metrics are validated per JESD51 standards and published in its official datasheet.