Texas Instruments TPS57114CQRTERQ1

Overview

TPS57114CQRTERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering up to 4 A continuous output current with input voltage range 2.95 V to 6 V, 0.8 V ±1% reference accuracy over –40°C to +150°C junction temperature, and adjustable 200 kHz–2 MHz switching frequency. It integrates two 12-mΩ (typ) MOSFETs and supports power-good monitoring, slow-start/sequencing, and external clock synchronization - deployed in ADAS domain controllers and automotive infotainment power rails.

For engineers reviewing the TPS57114CQRTERQ1 datasheet, TPS57114CQRTERQ1 pinout, TPS57114CQRTERQ1 application, or TPS57114CQRTERQ1 equivalent, key selection criteria include its automotive qualification (Grade 1), thermally enhanced 3-mm × 3-mm WQFN package, integrated current-mode control loop, BOOT-PH UVLO protection, and PWRGD open-drain fault signaling with 2% hysteresis.

Technical Context

The TPS57114CQRTERQ1 implements peak-current-mode control with internal slope compensation to prevent subharmonic oscillation across duty cycles up to 100%, enabled by BOOT-to-PH UVLO threshold of 2.2 V. Its error amplifier features transconductance of 245 µS (normal mode) and 79 µS (slow-start mode), referenced to either the 0.8-V internal bandgap or the SS/TR pin voltage.

Functional safety support includes documentation for ISO 26262 ASIL-B system integration, while thermal shutdown activates at 168°C with 20°C hysteresis. The RT/CLK pin supports both resistor-programmed timing (400 kΩ → ~500 kHz) and PLL-synchronized external clock operation (300–2000 kHz), with lock-in time of 42 µs at 500 kHz.

Key Specifications

Pinout & Package

TPS57114CQRTERQ1 uses a thermally enhanced 16-pin WQFN (RTE) package measuring 3.00 mm × 3.00 mm with exposed thermal pad. The pad must be soldered to PCB ground plane using ≥4 thermal vias for optimal thermal performance (R_θJB = 15.5°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with TPS57114CQRTERQ1, TPS54418RTER offers identical pinout but lacks automotive qualification and thermal robustness, while TPS62810QRTERQ1 reduces footprint by 33% but sacrifices frequency adjustability and synchronization - making TPS57114CQRTERQ1 optimal for thermally demanding, safety-aware automotive systems requiring flexible timing control.

Availability

TPS57114CQRTERQ1 is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC core rails, telematics gateway I/O supplies, and gateway MCU power rails requiring stable component supply with full AEC-Q100 traceability.

Supply support for TPS57114CQRTERQ1 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 experience in power management innovation.

The TPS571xxC-Q1 product line delivers high-efficiency, AEC-Q100-qualified synchronous buck converters for automotive subsystems requiring functional safety support, wide input range, and thermal resilience in harsh environments.

FAQ

What is the maximum junction temperature rating for the TPS57114CQRTERQ1?

The TPS57114CQRTERQ1 has a maximum operating junction temperature of +150°C, with thermal shutdown activating at 168°C and 20°C hysteresis. This rating supports deployment in under-hood automotive locations where ambient temperatures reach +125°C (Grade 1), and the 3-mm × 3-mm WQFN package with exposed thermal pad achieves R_θJB = 15.5°C/W when properly mounted.

Does the TPS57114CQRTERQ1 support external clock synchronization, and what is the valid frequency range?

Yes, the TPS57114CQRTERQ1 supports external clock synchronization via the RT/CLK pin with PLL lock-in. Valid input clock frequencies range from 300 kHz to 2 MHz, with minimum pulse width of 75 ns and lock-in time of 42 µs at 500 kHz. This enables deterministic EMI reduction in multi-converter automotive systems where timing alignment is critical for compliance.

How does the TPS57114CQRTERQ1 implement overvoltage protection, and what are the trip thresholds?

The TPS57114CQRTERQ1 uses its PWRGD comparator to detect overvoltage: when V_SENSE exceeds 109% of the 0.8-V reference (i.e., >0.872 V), the high-side MOSFET is immediately disabled until V_SENSE falls below 107% (i.e., <0.856 V). This dual-threshold scheme provides 2% hysteresis and limits output overshoot during fast load transients without requiring external components.

Can the undervoltage lockout (UVLO) threshold of the TPS57114CQRTERQ1 be adjusted, and how is it implemented?

Yes, the UVLO threshold of the TPS57114CQRTERQ1 can be adjusted using two external resistors on the EN pin. The internal pullup current source (1.6 µA) and hysteresis circuit allow setting rising/falling thresholds independently - for example, configuring V_START = 5.5 V and V_STOP = 5.2 V to ensure reliable startup above automotive battery brownout conditions while avoiding chatter during voltage fluctuations.

What is the purpose of the SS/TR pin on the TPS57114CQRTERQ1, and how does it behave during fault recovery?

The SS/TR pin on the TPS57114CQRTERQ1 controls soft-start and power sequencing by regulating to the lower of its voltage or the 0.8-V internal reference. During fault recovery (e.g., after thermal shutdown or UVLO), the SS/TR pin discharges to <60 mV before re-initiating power-up, ensuring repeatable ramp-up behavior and preventing erratic restarts. An internal 2-µA current source charges the external capacitor to set start-up time per Equation 4 in the datasheet.