STMicroelectronics ULQ2003D1013TR

Overview

ULQ2003D1013TR from STMicroelectronics is an automotive-grade seven-channel Darlington array in SO16 package, designed for high-voltage (50 V), high-current (500 mA continuous, 600 mA peak) switching of inductive loads. It integrates suppression diodes per channel, accepts TTL/CMOS-compatible inputs (VI(ON) = 2.4–3.0 V), and operates across −40 °C to 105 °C ambient. It is used in automotive body control modules to drive relays, solenoids, and thermal print-heads.

For engineers reviewing the ULQ2003D1013TR datasheet, ULQ2003D1013TR pinout, ULQ2003D1013TR application, or ULQ2003D1013TR equivalent, key selection criteria include output saturation voltage (VCE(SAT) ≤ 1.6 V at 350 mA), input current (II(ON) = 0.93–1.35 mA at 3.85 V), clamp diode forward voltage (VF = 1.7–2.0 V), thermal resistance (RthJA = 120 °C/W), and AEC-Q100 qualification for automotive use.

Technical Context

The ULQ2003D1013TR implements seven independent open-collector NPN Darlington pairs with common emitters and integrated flyback diodes-each configured to safely commutate inductive energy during turn-off. Its input pins are arranged opposite outputs (pins 1–7 vs. 10–16) to minimize PCB trace crosstalk and simplify routing in high-density automotive control boards.

It supports direct interface to 5 V TTL and CMOS logic families without external level-shifting, with guaranteed VI(ON) ≤ 3.0 V and II(OFF) ≤ 65 µA at 105 °C. The device meets AEC-Q100 Grade 1 requirements, including PAT, SYL, and SBL statistical reliability testing, and is rated for junction temperatures up to 150 °C.

Key Specifications

Pinout & Package

ULQ2003D1013TR uses a 16-pin SO16 (narrow) surface-mount package with 1.27 mm pitch, 10 mm × 4 mm body, and gull-wing leads. Thermal resistance is 120 °C/W (junction-to-ambient), optimized for convection-cooled automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Darlington array applications.

Compared with ULN2003A and TBD62083AFG, ULQ2003D1013TR uniquely delivers AEC-Q100 Grade 1 qualification, 500 mA per channel, and −40 °C to 105 °C operation-making it the sole option for production automotive body electronics where reliability and temperature resilience are mandatory.

Availability

ULQ2003D1013TR is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O expansion, thermal printer subsystems, and LED display multiplexing requiring stable component supply across multi-year production cycles.

Supply support for ULQ2003D1013TR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog components for automotive, industrial, and consumer markets.

The ULQ2003 series belongs to ST's high-voltage interface portfolio, engineered specifically for robust, space-constrained automotive load driving-emphasizing integrated protection, AEC-Q100 compliance, and simplified layout in ECU and body control applications.

FAQ

What is the maximum safe operating junction temperature for ULQ2003D1013TR?

The absolute maximum junction temperature is 150 °C. Under typical automotive ambient conditions (up to 105 °C), the device sustains 500 mA per channel continuously when mounted on a 2-layer PCB with ≥1 cm² copper pour per output. Derating is required above 85 °C ambient unless enhanced thermal design is implemented.

Can outputs be paralleled to increase current capacity?

Yes-outputs can be paralleled to deliver up to 3.5 A total (7 × 500 mA), provided traces are matched and shared COM connection maintains low impedance. ST confirms this configuration in the datasheet for driving high-power solenoids or multiple relays simultaneously with single-input control.

Does ULQ2003D1013TR require external pull-up resistors on inputs?

No-inputs are compatible with standard 5 V TTL and CMOS logic levels and do not require external pull-ups. The internal base resistors provide proper biasing for VI(ON) thresholds between 2.4 V and 3.0 V, enabling direct connection to microcontroller GPIOs operating at 3.3 V or 5 V.

How does the integrated clamp diode function during inductive load switching?

The diode connects each output collector to the COM pin, providing a low-impedance path for stored inductive energy during turn-off. When the Darlington turns off, back-EMF is clamped to VCOM + VF (≤2.0 V), preventing voltage spikes beyond 50 V and eliminating need for external diodes-critical for reliable relay and solenoid operation.