Texas Instruments TPS7A8801QRTJRQ1

Overview

TPS7A8801QRTJRQ1 from Texas Instruments is an automotive-grade dual-channel low-dropout (LDO) voltage regulator, each channel delivering 1 A with ≤250 mV dropout at full load, 4 µV_RMS output noise (10 Hz–100 kHz), and ±1% output accuracy over line/load/temperature - designed for powering noise-sensitive RF, radar, and high-speed analog circuits in ADAS ECUs.

For engineers reviewing the TPS7A8801QRTJRQ1 datasheet, TPS7A8801QRTJRQ1 pinout, TPS7A8801QRTJRQ1 application, or TPS7A8801QRTJRQ1 equivalent, key selection criteria include dual independent LDO architecture, wettable-flank WQFN-20 package, 1.4 V to 6.5 V input range, 0.8 V to 5.15 V adjustable output, and AEC-Q100 Grade 1 qualification for automotive under-hood operation.

Technical Context

The TPS7A8801QRTJRQ1 integrates two fully independent LDO channels sharing no internal bias or reference coupling - enabling high channel-to-channel isolation (>60 dB up to 1 MHz). Each channel features a dedicated error amplifier, soft-start control (SS_CTRLx), noise-reduction pin (NR/SSx), and open-drain power-good (PGx) output with 82–93% V_OUT threshold hysteresis.

Its architecture supports simultaneous operation across different input rails (e.g., VIN1 = 3.3 V, VIN2 = 5.0 V) and output voltages (e.g., OUT1 = 1.2 V for PLL core, OUT2 = 3.3 V for ADC digital supply), with PSRR of 70 dB at 100 Hz, 40 dB at 100 kHz and 1 MHz - critical for minimizing phase noise in VCOs and jitter in clock distribution.

Key Specifications

Pinout & Package

The TPS7A8801QRTJRQ1 is housed in a 4.0 mm × 4.0 mm wettable-flank WQFN-20 package with exposed thermal pad, optimized for automated optical inspection (AOI) and thermal performance in automotive modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-LDO voltage regulation applications.

Compared with TPS7A8300QRGRTQ1 and NCP1117ST50T3G, the TPS7A8801QRTJRQ1 uniquely delivers dual independent AEC-Q100 LDOs in one wettable-flank package - reducing solution size by ≈50% versus dual single-channel parts while maintaining automotive reliability, precise sequencing, and RF-grade noise performance.

Availability

TPS7A8801QRTJRQ1 is available at Aetrix Electronics and suitable for automotive radar modules, ADAS electronic control units, and telematics control units requiring stable component supply with full AEC-Q100 traceability and extended temperature support.

Supply support for TPS7A8801QRTJRQ1 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 electronics, with decades of automotive qualification expertise and broad power management portfolio.

The TPS7A88-Q1 product line was engineered specifically for noise-sensitive automotive applications - including radar, lidar, and high-speed sensor interfaces - where ultra-low noise, high PSRR, and AEC-Q100 reliability are mandatory.

FAQ

What is the maximum dropout voltage specification for the TPS7A8801QRTJRQ1 at full load?

The TPS7A8801QRTJRQ1 has a maximum dropout voltage of 250 mV per channel when delivering 1 A output current, measured at TJ = –40°C to +125°C with V_FB = 0.8 V – 3%. This ensures reliable regulation down to 0.8 V output from a 1.05 V input rail - critical for low-voltage processor cores in next-generation ADAS SoCs.

Does the TPS7A8801QRTJRQ1 support adjustable output voltage, and what is the range?

Yes, the TPS7A8801QRTJRQ1 supports fully adjustable output voltage via external resistor dividers on FB1 and FB2 pins. The specified range is 0.8 V to 5.15 V per channel, with ±1% accuracy maintained across the entire range under all operating conditions - enabling flexible power tree design for mixed-voltage automotive subsystems.

How does the TPS7A8801QRTJRQ1 achieve its 4 µVRMS output noise performance?

The TPS7A8801QRTJRQ1 achieves 4 µV_RMS noise through an integrated low-noise bandgap reference, optimized error amplifier topology, and dedicated NR/SSx pins that accept external capacitors to filter reference voltage noise. With a 10 nF feedforward capacitor and 1 µF NR/SS capacitor, noise is reduced to 3.8 µV_RMS at 0.8 V output - directly improving phase noise in radar VCOs.

What is the purpose of the SS_CTRLx pins on the TPS7A8801QRTJRQ1, and how should they be configured?

The SS_CTRLx pins (Pins 8 and 18) control the charging current into the NR/SSx capacitor to select soft-start speed. Tie SS_CTRLx to GND for normal soft-start (≈10 µA charge current) or to INx for fast start (≈100 µA). If no NR/SSx capacitor is used, SS_CTRLx must be tied to GND to prevent output overshoot during TPS7A8801QRTJRQ1 startup.

Is the TPS7A8801QRTJRQ1 compatible with standard WQFN-20 reflow profiles, and what is the thermal pad requirement?

Yes, the TPS7A8801QRTJRQ1 is compatible with standard lead-free reflow profiles (J-STD-020). Its exposed thermal pad must be soldered to a large-area inner-layer or bottom-side ground plane using ≥60% copper coverage and ≥4 thermal vias (0.3 mm diameter) to achieve the rated R_θJA of 39.8°C/W - essential for sustained 1 A operation at +125°C ambient in automotive modules.