STMicroelectronics STEVAL-1PS02C

Overview

STEVAL-1PS02C from STMicroelectronics is an evaluation board built around the ST1PS02CQTR 400 mA nano-quiescent synchronous step-down converter, featuring dynamically selectable 2.6–3.3 V output, Power Good signal, and auxiliary load switch (VOUT2) for subsystem power control. It operates from 1.8–5.5 V input and uses only a 2.2 µH inductor and two small capacitors.

For engineers reviewing the STEVAL-1PS02C datasheet, STEVAL-1PS02C pinout, STEVAL-1PS02C application, or STEVAL-1PS02C equivalent, this board enables rapid validation of ultra-low-power buck conversion in space-constrained wearable and sensor-edge designs with digital voltage selection and subsystem enable sequencing.

Technical Context

The board implements the ST1PS02CQTR IC in TQFN12 (2.0 × 1.7 mm) package, leveraging enhanced peak current control (PCC) architecture to achieve nano-quiescent operation and high light-load efficiency. Its auxiliary switch supports independent power gating of secondary rails without external FETs.

Input voltage range (1.8–5.5 V), digitally adjustable output (2.6–3.3 V in discrete steps), Power Good assertion threshold (±2% accuracy), and integrated EN/PGOOD/AUX control logic are all directly implemented on the board via jumpers and test points-no firmware or host controller required.

Key Specifications

Availability

STEVAL-1PS02C is available at Aetrix Electronics and suitable for wearable electronics development, Bluetooth® Low Energy sensor node prototyping, and industrial IoT edge device power validation requiring stable component supply and fast-turn evaluation support.

Supply support for STEVAL-1PS02C 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 delivering intelligent power, sensing, connectivity, and microcontroller solutions for industrial, automotive, and consumer applications.

The STEVAL-1PS02C belongs to ST's power management evaluation platform family, designed specifically to accelerate adoption of ultra-low-I_Q DC-DC converters in battery-powered edge devices where size, efficiency, and simplicity are critical.

FAQ

What is the primary function of the STEVAL-1PS02C evaluation board?

The STEVAL-1PS02C is a ready-to-use hardware platform for evaluating the ST1PS02CQTR nano-quiescent buck converter. It demonstrates full functionality-including digitally selectable output voltage (2.6–3.3 V), Power Good signaling, and auxiliary load switching-using minimal external components. No programming or configuration software is required.

Can the auxiliary output (VOUT2) be used independently of the main output?

Yes. The AUX switch (controlled by the AUX pin of ST1PS02CQTR) allows independent enabling/disabling of VOUT2, which is tied to the same regulated rail as VOUT. This enables sequenced or conditional power delivery to peripherals like sensors or RF modules without additional regulators or discrete switches.

What input sources are compatible with this board?

The board accepts 1.8–5.5 V DC input, making it compatible with single-cell Li-ion (2.7–4.2 V), LiFePO₄ (2.0–3.6 V), alkaline/coin cells (1.8–3.0 V), and regulated outputs from energy harvesters. Input filtering and reverse polarity protection are not included-external design considerations apply.

Is the ST1PS02CQTR IC soldered to the board, and is its package accessible for inspection?

Yes. The ST1PS02CQTR is permanently mounted in its TQFN12 (2.0 × 1.7 mm, 0.4 mm pitch) package on the top side of the board. All pins are routed to test points (TP1–TP4), and the IC marking, package outline, and thermal pad are fully visible for visual verification and thermal assessment.