Texas Instruments TPS7A1601QDGNRQ1

Overview

TPS7A1601QDGNRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified ultra-low-quiescent-current (5 µA) low-dropout linear regulator supporting 3 V to 60 V input and delivering up to 100 mA output with 2% accuracy and 60 mV dropout at 20 mA. It integrates enable (EN), open-drain power-good (PG) with user-programmable delay, and thermal/current protection - deployed in battery management systems, eCall modules, and automotive DC/DC pre-regulation stages.

For engineers reviewing the TPS7A1601QDGNRQ1 datasheet, TPS7A1601QDGNRQ1 pinout, TPS7A1601QDGNRQ1 application, or TPS7A1601QDGNRQ1 equivalent, key selection considerations include its 60-V absolute max input rating, programmable PG delay via external capacitor, HVSSOP-8 thermal-pad package compatibility with ceramic ≥2.2 µF output capacitance, and functional safety documentation support for ISO 26262 ASIL-B system integration.

Technical Context

The TPS7A1601QDGNRQ1 implements a high-voltage PMOS pass transistor architecture enabling operation up to 60 V while maintaining ultra-low 5 µA quiescent current across –40°C to +125°C ambient. Its internal reference (1.193 V typ) feeds an error amplifier controlling the pass device, with undervoltage lockout (2.7 V) and thermal shutdown (170°C) ensuring robustness during automotive transients like load dump.

Power sequencing is enabled via CMOS-compatible EN pin (VEN_HI = 1.2 V) and active-high open-drain PG output, where delay timing is set by external CDELAY charging from DELAY pin current (1–2 µA) to ~1.193 V - yielding precise, adjustable reset assertion (e.g., 12 ms with 10 nF). The device operates stably with ≥2.2 µF ceramic output capacitors and requires no feed-forward capacitor in fixed-output configurations.

Key Specifications

Pinout & Package

TPS7A1601QDGNRQ1 uses the 8-pin HVSSOP (DGN) package with exposed thermal pad (3.00 mm × 3.00 mm), optimized for high-power-density automotive PCB layouts requiring efficient heat dissipation through soldered thermal pad connection to GND plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-IQ, high-input-voltage LDO applications.

Compared with TPS7B8750QWDRBRQ1 and MAX5087ATA+T, the TPS7A1601QDGNRQ1 uniquely balances 60 V input, 5 µA IQ, programmable PG delay, and AEC-Q100 Grade 1 qualification - making it optimal for sequenced, ultra-low-power automotive subsystems where both transient robustness and standby efficiency are critical.

Availability

TPS7A1601QDGNRQ1 is available at Aetrix Electronics and suitable for automotive battery management systems, emergency call (eCall) modules, and onboard charger auxiliary supplies requiring stable component supply with AEC-Q100 compliance and long-lifecycle support.

Supply support for TPS7A1601QDGNRQ1 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-grade power management solutions, with decades of automotive qualification expertise and broad manufacturing scale.

The TPS7A16-Q1 product line delivers ultra-low-IQ, high-input-voltage LDOs specifically engineered for automotive and industrial battery-powered systems where extended standby life, transient resilience, and functional safety support are mandatory design requirements.

FAQ

What is the maximum input voltage rating for the TPS7A1601QDGNRQ1?

The TPS7A1601QDGNRQ1 has an absolute maximum input voltage rating of 62 V, with recommended operation up to 60 V. This allows direct connection to automotive 12 V/24 V systems and withstands load-dump transients per ISO 7637-2 without external protection. Operation above 24 V at full 100 mA load is thermally limited by package dissipation; derating is required per thermal data in the datasheet.

Does the TPS7A1601QDGNRQ1 require an external feedback resistor network?

No, the TPS7A1601QDGNRQ1 is the fixed-output variant (1.6 V) of the TPS7A16-Q1 family and does not require external feedback resistors. Pin 2 (FB/NC) may be left floating or tied to GND. Only adjustable versions (e.g., TPS7A1633QDGNRQ1) require the FB pin connected to a resistor divider between OUT and GND.

How is the power-good (PG) delay time set on the TPS7A1601QDGNRQ1?

The PG delay time on the TPS7A1601QDGNRQ1 is set by connecting an external capacitor (CDELAY) from Pin 7 (DELAY) to GND. The delay follows tDELAY ≈ (CDELAY × 1.193 V) / IDELAY, where IDELAY is 1–2 µA. For example, a 10 nF capacitor yields ~12 ms delay. Leaving DELAY open disables the delay function, causing PG to assert immediately upon VOUT exceeding the trip threshold.

What output capacitor value is required for stable operation of the TPS7A1601QDGNRQ1?

The TPS7A1601QDGNRQ1 is stable with a minimum 2.2 µF ceramic output capacitor (X7R or X5R dielectric). A 10 µF ceramic capacitor is recommended to maximize AC performance, including PSRR and transient response. Tantalum or electrolytic capacitors are not required and offer no stability benefit over properly rated ceramics.

Is the TPS7A1601QDGNRQ1 qualified for automotive use?

Yes, the TPS7A1601QDGNRQ1 is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C ambient), with documented HBM ±2 kV and CDM ±750 V ESD ratings. It also includes functional safety documentation (FIT rate, failure modes) to support ISO 26262 ASIL-B system-level certification in safety-critical vehicle subsystems.