Texas Instruments TPS2561AQDRCRQ1

Overview

TPS2561AQDRCRQ1 from Texas Instruments is a dual-channel automotive-grade high-side power switch with programmable current limiting (250 mA–2.8 A per channel), 44-mΩ typical R_DS(on), and fast 3.5-μs short-circuit response-designed for USB charging port protection in vehicle infotainment systems.

For engineers reviewing the TPS2561AQDRCRQ1 datasheet, TPS2561AQDRCRQ1 pinout, TPS2561AQDRCRQ1 application, or TPS2561AQDRCRQ1 equivalent, key selection criteria include AEC-Q100 qualification, independent fault reporting per channel, adjustable current limit via ILIM resistor, and thermal shutdown with hysteresis at 135°C/155°C.

Technical Context

The TPS2561AQDRCRQ1 integrates two independent N-channel MOSFET drivers with internal charge pumps enabling full enhancement down to 2.5 V input. Each channel features separate ENx control, FAULTx open-drain flag, and shared ILIM programming node.

Its overcurrent protection operates in constant-current mode by modulating gate drive to maintain IOS during overload, while built-in soft-start controls rise/fall times (0.5–3 ms) to suppress inrush into capacitive loads like USB ports.

Key Specifications

Pinout & Package

TPS2561AQDRCRQ1 uses a 10-pin SON (DRC) package with 3.00 mm × 3.00 mm body size and exposed PowerPAD™ for thermal management. Pin 1 is GND; pins 2 and 3 are tied IN inputs; pin 7 is ILIM; pins 4 and 5 are EN1/EN2; pins 8 and 9 are OUT2/OUT1; pins 6 and 10 are FAULT2/FAULT1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel automotive current-limiting power switch applications.

Compared with TPS2561DRCR, the TPS2561AQDRCRQ1 adds AEC-Q100 qualification and enhanced ESD robustness for automotive deployment; compared with TPS2557DRBR, it delivers integrated dual-channel control with matched current limiting and smaller board area, albeit at lower per-channel current rating.

Availability

TPS2561AQDRCRQ1 is available at Aetrix Electronics and suitable for automotive USB charging ports, infotainment system power distribution, and telematics interface protection requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TPS2561AQDRCRQ1 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 company specializing in analog, embedded processing, and automotive ICs, with leadership in power management and interface solutions.

The TPS2561A-Q1 product line delivers AEC-Q100-qualified, dual-channel current-limited power switches optimized for automotive USB charging, infotainment, and telematics applications where reliability under harsh electrical and thermal conditions is critical.

FAQ

What is the minimum input voltage required for TPS2561AQDRCRQ1 to operate reliably?

The TPS2561AQDRCRQ1 requires a minimum input voltage of 2.35 V (UVLO rising threshold) to enable normal operation. Its recommended operating range is 2.5 V to 6.5 V, and the internal charge pump functions down to 2.5 V to fully enhance the N-channel MOSFETs. Below 2.35 V, the device remains disabled to prevent unstable switching behavior during cold-crank or brownout conditions. This specification is verified in Section 7.3 of the TPS2561AQDRCRQ1 datasheet.

How does the ILIM pin on TPS2561AQDRCRQ1 set the current limit for both channels?

The ILIM pin on TPS2561AQDRCRQ1 sources a regulated current that scales linearly with the external resistor value (R_ILIM). The device uses this current to set identical current-limit thresholds (I_OS) for both channels via an internal proportional control loop. With R_ILIM = 20 kΩ, I_OS ≈ 2.75 A (typ); with R_ILIM = 100 kΩ, I_OS ≈ 560 mA (typ). The relationship is defined by TI's IOS equations in Section 10.2.1.2.2 of the TPS2561AQDRCRQ1 datasheet.

Can TPS2561AQDRCRQ1 be used in non-automotive applications?

Yes, the TPS2561AQDRCRQ1 can be used in non-automotive applications, but its AEC-Q100 qualification, enhanced ESD robustness (15 kV contact), and thermal shutdown thresholds (135°C/155°C) are specifically tuned for automotive environments. For industrial or consumer designs, the non-automotive TPS2561DRCR offers identical functionality at lower cost. However, TPS2561AQDRCRQ1 remains fully functional outside automotive contexts - its specifications do not degrade outside AEC-Q100 temperature or stress requirements.

What is the purpose of the 9-ms deglitch timing on the FAULTx outputs of TPS2561AQDRCRQ1?

The 9-ms deglitch timing on FAULT1 and FAULT2 prevents false fault assertions during benign events such as hot-plug insertion of capacitive USB loads, which cause brief current surges. The deglitch circuit holds the FAULTx signal low only after an overcurrent condition persists for ≥9 ms, ensuring reliable fault detection without nuisance interrupts. This timing is fixed and internal - no external components are needed. It applies only to overcurrent-induced faults; thermal faults assert immediately without deglitch.

Does TPS2561AQDRCRQ1 support independent current-limit settings for each channel?

No, the TPS2561AQDRCRQ1 does not support independent current-limit settings. Both channels share the same ILIM pin and therefore inherit identical current-limit thresholds determined by a single external R_ILIM resistor. This architecture simplifies design for symmetric dual-port applications like mirrored USB-A ports. If asymmetric current limiting is required, two separate single-channel devices (e.g., TPS2557DRBR) must be used - a configuration explicitly noted as non-equivalent in the TPS2561AQDRCRQ1 datasheet.