Texas Instruments TPS7A4301DGQR

Overview

TPS7A4301DGQR from Texas Instruments is a 50-mA, 85-V ultra-low IQ (5.5 μA) low-dropout linear voltage regulator with dual outputs: adjustable/fixed OUT (1.24–14.5 V) and selectable MID_OUT (10/12/15 V), 1% output accuracy over –40°C to +125°C, and integrated power-good and precision enable. It serves as primary and auxiliary bias supply in high-voltage industrial power rails.

For engineers reviewing the TPS7A4301DGQR datasheet, TPS7A4301DGQR pinout, TPS7A4301DGQR application, or TPS7A4301DGQR equivalent, key selection criteria include its 85-V input withstand capability, shared 50-mA current budget between OUT and MID_OUT, thermal shutdown protection, HVSSOP-10 package with exposed thermal pad, and MVSEL pin-based MID_OUT voltage selection.

Technical Context

The TPS7A4301DGQR integrates two independent LDO regulation paths: one for the main OUT rail (feedback-controlled via FB pin for adjustable versions or internal resistor divider for fixed), and another for the MID_OUT rail configured by MVSEL1/MVSEL2 logic inputs. Its precision enable (VEN(HI) = 1.24 V ±0.09 V, hysteresis = 50 mV) enables accurate sequencing control without external comparators.

Power-good monitoring operates on the OUT feedback node with rising threshold at 93% VOUT (±3.5%) and 3% hysteresis; PG is open-drain and supports system-level power sequencing. The device sustains 90-V transient input for 200 ms and maintains stability with minimum 1-μF CIN and 1–100-μF COUT (CMID_OUT ≥ 3×COUT).

Key Specifications

Pinout & Package

HVSSOP-10 (DGQ) package, 3.00 mm × 3.00 mm body, exposed thermal pad (connected to GND for optimal thermal performance). RθJA = 53.7°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A4501DGQR and LT3094EMSE#PBF, the TPS7A4301DGQR uniquely delivers dual regulated outputs (OUT + MID_OUT) within an 85-V input envelope and 5.5-μA IQ, making it the only option for compact, high-voltage, dual-rail biasing without external components.

Availability

TPS7A4301DGQR is available at Aetrix Electronics and suitable for cordless power tools, programmable logic controllers (PLCs), and EV charging infrastructure requiring stable component supply across extended temperature and high-voltage operating conditions.

Supply support for TPS7A4301DGQR 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 headquartered in Dallas, Texas, designing and manufacturing analog ICs, embedded processors, and digital signal processors for industrial, automotive, and consumer markets.

The TPS7A43 product line delivers high-input-voltage, ultra-low-IQ LDOs with dual-output capability specifically for industrial automation, energy infrastructure, and battery-powered equipment demanding long service life and robust transient immunity.

FAQ

What is the maximum input voltage the TPS7A4301DGQR can withstand without damage?

The TPS7A4301DGQR has an absolute maximum input voltage rating of 90 V, with specified transient withstand capability of 90 V for 200 ms. Continuous operation is rated up to 85 V. Exceeding 90 V risks permanent damage per Absolute Maximum Ratings. The device's robust input stage enables direct connection to 48-V industrial buses and 15-cell battery packs without external clamping.

How does the TPS7A4301DGQR allocate its 50-mA total output current between OUT and MID_OUT rails?

The TPS7A4301DGQR shares a total 50-mA current budget between OUT and MID_OUT - i.e., IOUT + IMID_OUT ≤ 50 mA. This constraint is enforced by internal current limiting (ICL(OUT) = 125 mA typ, ICL(MID_OUT) = 145 mA typ), but thermal limits and dropout behavior govern practical allocation. For example, at VIN = 16.5 V and VMID_OUT = 15 V, both rails can deliver ~25 mA simultaneously before thermal derating occurs.

Can the TPS7A4301DGQR's MID_OUT voltage be adjusted continuously, or is it limited to discrete values?

The TPS7A4301DGQR's MID_OUT voltage is limited to three discrete factory-set values: 10 V, 12 V, or 15 V, selected by the logic states of MVSEL1 and MVSEL2 pins. It does not support continuous adjustment. The datasheet specifies exact thresholds: (LOW, LOW) = 10 V, (LOW, HIGH) = 12 V, (HIGH, LOW) = 15 V. Floating either MVSEL pin is prohibited and may cause undefined output voltage.

What is the purpose of the NC pin on the TPS7A4301DGQR HVSSOP-10 package?

The NC (no-connect) pin on the TPS7A4301DGQR - pin 9 in the adjustable version and pin 2 in the fixed version - has no internal connection and must be left floating to maintain high-voltage clearance (>85 V) between the IN and MID_OUT pins. Connecting it to GND or any other net compromises creepage/clearance and violates safety isolation requirements in industrial and EV applications.

Does the TPS7A4301DGQR require external capacitors, and what are the minimum values?

Yes, the TPS7A4301DGQR requires external capacitors: minimum 0.1-μF ceramic CIN from IN to GND; 1–100-μF COUT from OUT to GND; and CMID_OUT ≥ 3×COUT (e.g., ≥3 μF if COUT = 1 μF). All capacitors must be placed adjacent to their respective pins. Derating to 50% of nominal value is assumed - e.g., a 2.2-μF X7R capacitor provides ≥1.1 μF at bias.