Texas Instruments TPS7A4333DGQR

Overview

TPS7A4333DGQR from Texas Instruments is a 50-mA, 85-V ultra-low IQ (5.5 µA) LDO 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 bias supply in high-voltage industrial sensor nodes and gate driver rails for cordless power tools.

For engineers reviewing the TPS7A4333DGQR datasheet, TPS7A4333DGQR pinout, TPS7A4333DGQR application, or TPS7A4333DGQR equivalent, key selection criteria include its 85-V input tolerance, shared 50-mA current budget between OUT and MID_OUT, HVSSOP-10 thermal performance (RθJA = 53.7°C/W), and precision enable threshold (VEN(HI) = 1.24 V).

Technical Context

The TPS7A4333DGQR implements a high-voltage bipolar-based LDO architecture enabling operation from 4 V to 85 V while maintaining ultra-low quiescent current (5.5 µA typical). Its dual-output topology separates regulation paths: OUT uses external feedback resistors (adjustable) or internal divider (fixed), while MID_OUT voltage is selected via MVSEL1/MVSEL2 logic inputs (10/12/15 V).

Power sequencing is supported through open-drain PG (monitors FB voltage with 93% VOUT rising threshold) and precision enable (1.24 V rising threshold with 50 mV hysteresis). Thermal shutdown (170°C) and overcurrent protection (125 mA OUT limit, 145 mA MID_OUT limit) ensure robustness under fault conditions.

Key Specifications

Pinout & Package

TPS7A4333DGQR is housed in a thermally enhanced HVSSOP-10 (DGQ) package measuring 3.00 mm × 3.00 mm with exposed thermal pad. RθJA = 53.7°C/W enables 50-mA operation without forced air in compact industrial enclosures.

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 LM5143AQDGQRQ1, the TPS7A4333DGQR uniquely delivers dual regulated outputs (OUT + MID_OUT) within a single 85-V tolerant LDO, enabling compact gate driver biasing and precision sequencing without external components - a capability neither alternative provides.

Availability

TPS7A4333DGQR is available at Aetrix Electronics and suitable for cordless power tools, programmable logic controllers (PLCs), field transmitters, and battery packs requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.

Supply support for TPS7A4333DGQR 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 was engineered specifically for high-input-voltage industrial systems needing ultra-low-power, dual-rail LDO regulation - addressing design gaps in battery-powered tools, process instrumentation, and EV infrastructure where traditional LDOs fail at >60 V.

FAQ

What is the maximum input voltage rating for the TPS7A4333DGQR, and how does it handle transients?

The TPS7A4333DGQR has an absolute maximum input voltage of 90 V and is rated to withstand 85-V transients for up to 200 ms. This capability is validated per TI's Absolute Maximum Ratings table and enables direct connection to 15-cell Li-ion packs and 48-V industrial buses without external surge protection. The device remains fully functional during these events, provided thermal limits are observed.

How is the MID_OUT voltage selected on the TPS7A4333DGQR, and what are the valid configurations?

The TPS7A4333DGQR MID_OUT voltage is set using the MVSEL1 and MVSEL2 pins: 0 V/0 V selects 10 V, 1.8 V/0 V selects 12 V, and 1.8 V/1.8 V selects 15 V. These inputs must never be left floating - unused pins should be tied to GND. Configuration is latched at power-up and remains static during operation, making it ideal for fixed-function gate driver biasing.

Does the TPS7A4333DGQR support adjustable output voltage, and what is the accuracy specification?

Yes, the TPS7A4333DGQR supports adjustable OUT voltage from 1.24 V to 14.5 V using an external resistor divider on the FB pin. Its output accuracy is ±1% over the full operating temperature range (–40°C to +125°C), as specified in the Electrical Characteristics table under ΔVOUT for adjustable versions. This eliminates post-manufacturing calibration in precision analog systems.

What is the current-sharing behavior between OUT and MID_OUT on the TPS7A4333DGQR?

The TPS7A4333DGQR allocates a total of 50 mA maximum between OUT and MID_OUT outputs. If MID_OUT supplies 30 mA, only 20 mA remains available for OUT. This shared current limit is enforced internally and is independent of output voltage - critical for thermal design in compact layouts where both rails operate simultaneously.

Can the TPS7A4333DGQR's power-good (PG) output be used for system reset sequencing, and what is its threshold?

Yes, the open-drain PG output asserts low until the OUT voltage reaches 93% of its target (VIT(PG,RISING)), then goes high-impedance. With a 10-kΩ pullup to 3.3 V, this provides clean reset signaling for MCUs. The PG pin monitors the FB node directly, ensuring accurate tracking of regulated output voltage - essential for reliable boot sequencing in multi-rail industrial systems.