STMicroelectronics STEVAL-1PS01DJR

Overview

STEVAL-1PS01DJR from STMicroelectronics is an evaluation board based on the ST1PS01DJR 400 mA nano-quiescent synchronous step-down converter, designed for ultra-low-power wearable and energy-harvesting systems. It supports 1.8 V–5.5 V input, delivers selectable 1.8 V–2.8 V output via D0/D1 digital control, includes Power Good signaling, and uses only a 2.2 µH inductor and two small capacitors.

For engineers reviewing the STEVAL-1PS01DJR datasheet, STEVAL-1PS01DJR pinout, STEVAL-1PS01DJR application, or STEVAL-1PS01DJR equivalent, this board enables rapid validation of dynamic voltage scaling, low-I_Q DC/DC performance, and compact power architecture in single-cell Li-ion and Bluetooth® Low Energy sensor nodes.

Technical Context

The board implements the ST1PS01DJR IC in a fully assembled, tested configuration with accessible test points (TP1, TP2), configurable jumpers (JP1), and dual-header interfaces (CN1–CN6) for VIN, VOUT, GND, EN, D0, D1, and PGOOD. All critical signals are routed with controlled impedance and minimal parasitic inductance to preserve nano-quiescent operation.

Enhanced peak current control (PCC) enables stable regulation at light loads down to 1 µA quiescent current while maintaining >90% efficiency at 100 mA output. Dynamic voltage selection operates across four discrete levels (1.8 V, 2.0 V, 2.5 V, 2.8 V) using binary-encoded D0/D1 inputs without external DAC or I²C interface.

Key Specifications

Availability

STEVAL-1PS01DJR 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-1PS01DJR 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, delivering microcontrollers, power management ICs, sensors, and analog solutions for industrial, automotive, and consumer applications.

The STEVAL-1PS01DJR belongs to ST's ultra-low-power DC/DC evaluation platform family, engineered specifically to accelerate design-in of nano-quiescent buck converters in space-constrained, battery-sensitive applications.

FAQ

What is the purpose of the JP1 jumper on STEVAL-1PS01DJR?

JP1 configures the D0/D1 digital control inputs between pull-up and floating states, enabling hardware-based selection of one of four fixed output voltages (1.8 V, 2.0 V, 2.5 V, or 2.8 V) without MCU intervention. This allows standalone testing or factory-set voltage configuration prior to integration.

Can STEVAL-1PS01DJR operate from a 3.0 V coin cell battery?

Yes - the board operates across 1.8 V–5.5 V input, making it compatible with common CR2032 (3.0 V nominal) and BR-type batteries. At 3.0 V input, it delivers up to 400 mA at 2.8 V output with >88% efficiency and maintains regulation down to 1.8 V input during battery discharge.

Does STEVAL-1PS01DJR include ESD protection on its I/O headers?

No - CN1–CN6 are unbuffered 0.1" pitch headers with direct connections to ST1PS01DJR pins (EN, D0, D1, PGOOD, VIN, VOUT, GND). External TVS diodes or series resistors must be added per system-level ESD requirements (IEC 61000-4-2 Level 4).

How is Power Good (PGOOD) signaled on this board?

PGOOD is available at pin 4 of CN3 (labeled "PGOOD") as an open-drain output referenced to VOUT. It asserts high (via external pull-up) when output voltage is within ±3% of target and remains asserted for ≥100 µs after regulation is achieved, supporting reliable system power sequencing.