STMicroelectronics STPMIC25APQR

Overview

STPMIC25APQR from STMicroelectronics is a highly integrated power management IC (PMIC) designed as a companion chip for the STM32MP2x microprocessor units. It delivers seven adaptive constant-on-time buck converters (2 MHz, forced PWM + spread spectrum), six programmable LDOs, one DDR-termination LDO (sink-source), one USB PHY LDO with automatic source detection, and one VREFDDR reference LDO - all in a single VQFN56 package. It powers CPU cores, GPU, DDR memory, USB PHY, and system peripherals in portable IoT and smart home devices.

For engineers reviewing the STPMIC25APQR datasheet, STPMIC25APQR pinout, STPMIC25APQR application, or STPMIC25APQR equivalent, key selection criteria include its 7-buck/6-LDO topology, NVM-programmable power-up sequencing (Ranks 0–5), I²C + digital I/O control interface, VIN range (2.8–5.5 V), and thermal shutdown at 150 °C - critical for embedded MPU power architecture validation.

Technical Context

The STPMIC25APQR implements an advanced multi-rail power architecture with phase-shift synchronized buck converters using an integrated PLL and programmable spread-spectrum modulation to suppress EMI. Its non-volatile memory stores default output voltages, power-up/down sequences, protection thresholds, and I²C slave address - enabling factory-configured variants (A/B/D) for specific STM32MP2 processor versions.

Each of the seven bucks supports seamless low-power mode (LPM) to high-power mode (HPM) transition, while six general-purpose LDOs offer adjustable outputs (0.9–4.0 V, ±2% accuracy) and configurable current limits (50–600 mA). The dedicated DDR termination LDO operates in sink-source mode, and the USB PHY LDO autonomously selects between VIN and VBUS sources.

Key Specifications

Pinout & Package

VQFN 56L (6.5 × 6.5 × 0.9 mm) package with exposed thermal pad (EPGND) connected to GND for optimal heat transfer. Pin count: 56 signal terminals + 1 ePad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail PMIC applications.

Compared with TPS659422RHBR and RT5782AZSP, the STPMIC25APQR uniquely integrates DDR sink-source termination, hardware PWRCTRL toggles, and NVM-programmable rank sequencing - making it the only choice for STM32MP2-based designs requiring guaranteed boot integrity and minimal external components.

Availability

STPMIC25APQR is available at Aetrix Electronics and suitable for smart home hubs, industrial IoT gateways, wearable health monitors, and portable human-machine interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STPMIC25APQR 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, specializing in microcontrollers, power management, sensors, and automotive ICs.

The STPMIC25 product line is engineered specifically for STM32MP2-series microprocessor units, delivering tightly coupled, NVM-configurable power delivery with DDR-optimized regulation and ultra-low quiescent current for next-generation embedded Linux platforms.

FAQ

What is the function of the PWRCTRL1–3 pins on STPMIC25APQR?

These are dedicated hardware control inputs that allow immediate ON/OFF toggling of preassigned buck or LDO regulators without I²C communication. Each pin defaults to pull-up and can be driven low to activate its assigned rail group - enabling sub-microsecond response for real-time power state transitions in safety-critical or low-latency applications.

Does STPMIC25APQR support DDR4 memory termination?

Yes. LDO7 is specifically designed as a DDR3L/DDR4 termination regulator with sink-source capability, delivering up to 0.4 A with programmable current limit and bypass mode. It replaces external termination resistors and supports both standard and lpDDR configurations via NVM configuration.

How is the startup sequence programmed in STPMIC25APQR?

The startup sequence is stored in on-chip non-volatile memory (NVM) and divided into six ranks (0–5). Each regulator is assigned a rank determining its turn-on delay (1.5–6 ms increments after POWER_ON). Default ranks are factory-programmed per variant (A/B/D), and the NVM can be reprogrammed via I²C in-system for custom sequencing.

What thermal protections does STPMIC25APQR provide?

It includes thermal warning at 125 °C (TWRN_Rise) and full shutdown at 150 °C (TSHDN_Rise), with hysteresis of 20–30 °C. A 3-second delay (tTSHDN_DLY) prevents nuisance shutdown during transient spikes. All protections are hardware-enforced and independent of I²C or host control.