Texas Instruments TPS7A4350DGQR

Overview

TPS7A4350DGQR from Texas Instruments is a 50-mA, 85-V ultra-low-I_Q LDO voltage regulator with dual outputs (OUT and MID_OUT), precision enable, power-good flag, and selectable mid-rail voltages (10 V/12 V/15 V). It delivers 1% output accuracy over –40°C to +125°C, supports input transients up to 90 V for 200 ms, and draws only 5.5 µA quiescent current - enabling long battery life in high-voltage industrial sensors and EV charging modules.

For engineers reviewing the TPS7A4350DGQR datasheet, TPS7A4350DGQR pinout, TPS7A4350DGQR application, or TPS7A4350DGQR equivalent, this page provides verified technical context, validated pin functions, confirmed dual-output design constraints, thermal performance data (R_θJA = 53.7°C/W), and real-world application guidance for high-input-voltage LDO selection.

Technical Context

The TPS7A4350DGQR integrates two independent regulation paths: a main adjustable/fixed OUT rail (1.24–14.5 V) and a selectable MID_OUT rail (10/12/15 V), sharing a 50-mA total current budget. Its precision enable input (VEN(HI) = 1.24 V ±50 mV) enables accurate sequencing with resistor dividers, while the open-drain PG output monitors feedback voltage to signal valid OUT regulation.

Internally, it uses a high-voltage bipolar process to withstand 85-V continuous and 90-V transient inputs. The device implements thermal shutdown (170°C) and current limiting (ICL(OUT) = 125 mA typical), with separate dropout specifications: V_DO(OUT) = 800 mV at 50 mA and V_DO(MID_OUT) = 600 mV at 50 mA - confirming distinct headroom requirements per rail.

Key Specifications

Pinout & Package

TPS7A4350DGQR is packaged in a 10-pin HVSSOP (DGQ) with 3.00 mm × 3.00 mm body size and exposed thermal pad. The package supports R_θJA = 53.7°C/W and requires GND connection of the thermal pad for thermal compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT3090EMSE#PBF and TPS7A4501DGQR, the TPS7A4350DGQR uniquely delivers coordinated dual-rail regulation, integrated sequencing capability via EN/PG, and 85-V input tolerance - making it the sole option for compact, high-reliability 10–15 V gate driver biasing in next-generation EV and industrial power systems.

Availability

TPS7A4350DGQR is available at Aetrix Electronics and suitable for cordless power tools, EV charging infrastructure, and programmable logic controllers requiring stable component supply across extended temperature and high-voltage operating conditions.

Supply support for TPS7A4350DGQR 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 power management technologies, with decades of expertise in high-reliability industrial and automotive power solutions.

The TPS7A43 product line was designed specifically for high-input-voltage industrial applications demanding ultra-low quiescent current, dual-rail flexibility, and robust transient immunity - targeting battery-powered sensors, motor drives, and EV infrastructure.

FAQ

What is the maximum input voltage the TPS7A4350DGQR can withstand continuously and transiently?

The TPS7A4350DGQR supports continuous input voltage from 4 V to 85 V. Per Absolute Maximum Ratings, it withstands 90 V for up to 200 ms - sufficient to survive IEC 61000-4-5 Level 4 surge events in industrial environments. Operation above 85 V must remain within the 200-ms limit to avoid permanent damage.

How is the MID_OUT voltage selected on the TPS7A4350DGQR?

The TPS7A4350DGQR uses MVSEL1 and MVSEL2 pins to set MID_OUT: tie MVSEL1 = GND and MVSEL2 = GND for 10 V; MVSEL1 = GND and MVSEL2 = VIN for 12 V; MVSEL1 = VIN and MVSEL2 = GND for 15 V. Both pins must be actively driven - floating is prohibited per datasheet Section 5.1.

Does the TPS7A4350DGQR support adjustable output voltage, and what is the feedback reference voltage?

Yes, the TPS7A4350DGQR supports adjustable output via the FB pin. Its internal reference voltage is precisely 1.24 V (typical), enabling accurate V_OUT setting from 1.24 V to 14.5 V using an external resistor divider. Fixed-output variants exist, but TPS7A4350DGQR is the adjustable version per TI's part numbering convention.

What is the current-sharing behavior between OUT and MID_OUT on the TPS7A4350DGQR?

The TPS7A4350DGQR has a total 50-mA current budget shared between OUT and MID_OUT. If MID_OUT supplies 30 mA, only 20 mA remains available for OUT. This constraint is explicitly stated in Section 1 Features and Electrical Characteristics - exceeding 50 mA total causes thermal foldback or dropout.

Can the TPS7A4350DGQR's power-good (PG) output be used for system reset sequencing?

Yes, the open-drain PG output asserts low when V_OUT falls below 93% of its nominal value (V_IT(PG,RISING)), and releases when V_OUT rises above that threshold. When pulled up to a compatible logic voltage, PG provides a clean reset signal for MCUs - confirmed in Section 7.3 and Figure 6-12 start-up waveforms in the datasheet.