STMicroelectronics STLQ015XG30R

Overview

STLQ015XG30R from STMicroelectronics is a 150 mA ultra-low-quiescent-current linear voltage regulator in SOT23-5L package, delivering 3.0 V output with ±2% tolerance at 25 °C, 112 mV typical dropout at 150 mA, and 1.4 µA quiescent current under full load - designed for microcontroller core supply in battery-powered IoT sensors.

For engineers reviewing the STLQ015XG30R datasheet, STLQ015XG30R pinout, STLQ015XG30R application, or STLQ015XG30R equivalent, key selection criteria include shutdown current (≤200 nA at 125 °C), ceramic capacitor compatibility (1 µF min), logic-controlled enable, thermal protection, and operation across –40 °C to 125 °C.

Technical Context

This LDO employs a P-channel MOSFET pass element enabling low dropout and nanoscale shutdown current. Its internal bandgap reference and error amplifier maintain tight output regulation across input (1.5–5.5 V) and load (0–150 mA) variations, with line regulation of ±0.01 %/V and load regulation of ±0.002 %/mA.

The device integrates logic-level enable control (VEN low = shutdown, high = active), thermal shutdown at 170 °C with 15 °C hysteresis, and short-circuit current limiting (250–350 mA). It achieves 40 dB PSRR at 1 kHz and 75 µVRMS output noise (10–100 kHz) at 0.8 V output.

Key Specifications

Pinout & Package

SOT23-5L package: 5-pin surface-mount, 2.95 mm × 1.60 mm footprint, 1.45 mm max height, ECOPACK® compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-IQ LDO applications.

Compared with XC6206P302MR and ADP160ACBZ-3.0-R7, STLQ015XG30R uniquely balances sub-µA shutdown, 1.4 µA loaded IQ, integrated enable, and 112 mV dropout - making it optimal for battery-powered systems requiring both long life and dynamic power management.

Availability

STLQ015XG30R is available at Aetrix Electronics and suitable for wireless sensor nodes, wearable health monitors, smart meter endpoints, and industrial predictive maintenance sensors requiring stable component supply across extended product lifecycles.

Supply support for STLQ015XG30R 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, designing and manufacturing silicon solutions for automotive, industrial, and consumer markets with emphasis on energy efficiency and reliability.

The STLQ015 belongs to ST's ultra-low-power LDO family, engineered specifically for battery-operated devices where multi-year operation and firmware-controllable power states are critical design requirements.

FAQ

What is the minimum input voltage required for 3.0 V output regulation?

The STLQ015XG30R requires VIN ≥ 3.112 V to maintain 3.0 V output at 150 mA load, based on its 112 mV typical dropout voltage. At lighter loads, input can drop to 3.02 V (1.4 µA IQ condition), but full 150 mA capability demands ≥3.112 V. Operation below 1.5 V input is not supported.

Can I use a 0.47 µF ceramic capacitor instead of 1 µF for stability?

Yes - the datasheet specifies stable operation with output capacitance from 0.47 µF to 10 µF, provided ESR remains between 56 mΩ and 6 Ω. A 0.47 µF X5R capacitor meets this requirement and reduces board area, though 1 µF is recommended for best transient response and PSRR performance.

Does the NC pin require any PCB routing or grounding?

No - Pin 4 (NC) is internally unconnected and must remain electrically floating. ST recommends leaving it unconnected on the PCB; grounding or routing to any net may cause unpredictable behavior or violate internal isolation. The SOT23-5L footprint accommodates this via an open pad.

How does thermal shutdown behave during continuous overload?

When junction temperature reaches 170 °C, the device disables output and enters thermal shutdown. It remains off until temperature drops by ~15 °C (hysteresis), then automatically resumes regulation. This cycle prevents permanent damage during sustained short-circuit or excessive ambient conditions, with no latch-up or manual reset required.