Texas Instruments TPS37EE4554FDSKRQ1

Overview

TPS37EE4554FDSKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive dual-channel overvoltage/undervoltage detector with independent SENSE1 (OV) and SENSE2 (UV) monitoring, 1 µA typical quiescent current, 65 V input rating on VDD/SENSE/RESET pins, and programmable sense/reset delays via external capacitors. It enables robust power-rail supervision in telematics control units and emergency call systems.

For engineers reviewing the TPS37EE4554FDSKRQ1 datasheet, TPS37EE4554FDSKRQ1 pinout, TPS37EE4554FDSKRQ1 application, or TPS37EE4554FDSKRQ1 equivalent, key selection criteria include its dual-threshold architecture (OV on SENSE1, UV on SENSE2), 2.7–65 V supply range, ±1.5% voltage threshold accuracy across –40°C to +125°C, 10 µs detection time, and WSON-10 (DSK) package with wettable flanks for AOI compatibility.

Technical Context

The TPS37EE4554FDSKRQ1 implements two independent voltage monitoring channels: SENSE1 triggers RESET1 on overvoltage (OV) events with user-programmable CTS1/CTR1 timing; SENSE2 triggers RESET2 on undervoltage (UV) events with CTS2/CTR2 control. Each channel supports open-drain or push-pull output topology and features built-in hysteresis (2–13% or fixed 0.5–2.5 V options).

VDD and SENSE pins operate independently-VDD may be supplied at 2.7 V while SENSE1 monitors up to 65 V battery rails-enabling redundancy in high-reliability automotive systems. The device lacks internal clamps, requiring external protection to stay within ±0.3 V to 70 V absolute maximum ratings.

Key Specifications

Pinout & Package

TPS37EE4554FDSKRQ1 is packaged in a 10-pin WSON (DSK) with 2.5 mm × 2.5 mm body size and wettable flanks for automated optical inspection. The central thermal pad is non-conductive to meet IEC60664 creepage requirements between VDD and GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel voltage supervisor applications.

Compared with TPS37EE4554FDSKRQ1, TPS3700QDCKRQ1 provides simpler single-rail supervision but cannot replace dual independent monitoring, while TLV809EYZTR lacks AEC-Q100 qualification, 65 V capability, and programmable timing-making neither a drop-in alternative.

Availability

TPS37EE4554FDSKRQ1 is available at Aetrix Electronics and suitable for telematics control units, emergency call systems, and audio amplifiers requiring stable component supply in automotive production environments.

Supply support for TPS37EE4554FDSKRQ1 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 and embedded processing technologies, with leadership in automotive-grade power management and signal chain solutions.

The TPS37-Q1 product line delivers high-voltage, ultra-low-quiescent-current voltage supervisors designed specifically for AEC-Q100 Grade 1 automotive applications including battery monitoring, ADAS domain controllers, and infotainment power sequencing.

FAQ

What is the function of the CTS1 and CTS2 pins on the TPS37EE4554FDSKRQ1?

The CTS1 and CTS2 pins on the TPS37EE4554FDSKRQ1 provide user-programmable sense time delay for RESET1 and RESET2 outputs respectively. Connecting a capacitor from CTS1 or CTS2 to GND sets the assertion delay-10 nF yields 1.28 ms, 10 µF yields 1.28 s. This feature debounces voltage glitches on SENSE1 or SENSE2, preventing false resets during battery transients. The TPS37EE4554FDSKRQ1 uses internal 100 kΩ timing resistors to convert capacitance into precise delay intervals.

Does the TPS37EE4554FDSKRQ1 support both overvoltage and undervoltage detection on the same input pin?

No, the TPS37EE4554FDSKRQ1 does not perform combined OV/UV detection on a single pin. It uses dedicated inputs: SENSE1 is configured exclusively for overvoltage detection (RESET1 assertion above VIT+), and SENSE2 is configured exclusively for undervoltage detection (RESET2 assertion below VIT−). This separation enables independent threshold setting, hysteresis, and timing per channel-critical for automotive systems where battery and backup rails require distinct fault responses. The TPS37EE4554FDSKRQ1 datasheet confirms this dual-path architecture in Figure 6-1 and Table 6-1.

What output topologies are supported by the TPS37EE4554FDSKRQ1, and how do they differ in implementation?

The TPS37EE4554FDSKRQ1 supports both open-drain and push-pull output topologies on RESET1 and RESET2, selectable via part number suffix. For TPS37EE4554FDSKRQ1, RESET2_UVOD indicates open-drain active-low output, requiring an external pull-up resistor. RESET1_OV## supports either topology depending on variant. Push-pull eliminates external components but consumes more current during state transitions; open-drain allows wired-OR configurations and voltage-level translation. The TPS37EE4554FDSKRQ1's output driver is rated for ±5 mA sink/source and operates across the full 2.7–65 V supply range.

How does the TPS37EE4554FDSKRQ1 achieve AEC-Q100 Grade 1 qualification, and what does that mean for system design?

The TPS37EE4554FDSKRQ1 achieves AEC-Q100 Grade 1 qualification through device-level testing across –40°C to +125°C ambient temperature, HBM ESD classification Level 2 (±2 kV), and CDM ESD classification Level C7B (±750 V). This certification validates its suitability for engine compartment–adjacent applications where thermal stress and electrical noise are severe. For system design, it guarantees parametric stability-including ±1.5% threshold accuracy and 1 µA quiescent current-over the full Grade 1 temperature range, eliminating derating calculations for automotive power-supply supervisors. The TPS37EE4554FDSKRQ1 meets these requirements without external compensation.

Can the TPS37EE4554FDSKRQ1 monitor voltage rails higher than its VDD supply voltage?

Yes, the TPS37EE4554FDSKRQ1 can monitor voltage rails higher than its VDD supply voltage. Its SENSE1 and SENSE2 pins are rated for 65 V continuous operation independent of VDD, which may be supplied as low as 2.7 V. This enables use cases such as monitoring a 48 V battery rail while powering the TPS37EE4554FDSKRQ1 from a local 3.3 V LDO. However, the device contains no internal voltage clamps-external TVS diodes or Zener networks must limit SENSE pin voltage to ≤70 V absolute maximum to prevent damage. This capability is explicitly documented in Section 8.1 of the TPS37EE4554FDSKRQ1 datasheet.