STMicroelectronics STPMIC1CPQR

Overview

STPMIC1CPQR from STMicroelectronics is a highly integrated power management IC (PMIC) designed as a companion chip for STM32MP1 microprocessor units. It delivers 4 adaptive COT buck converters (1.1–3.3 V, up to 90% efficiency), 4 adjustable LDOs, DDR3 termination LDO (sink-source/bypass), USB PHY LDO with auto-source detection, reference LDO for DDR memory, 5.2 V/1.1 A boost converter, and dual 500 mA power switches - all in a WFQFN-44 package.

For engineers reviewing the STPMIC1CPQR datasheet, STPMIC1CPQR pinout, STPMIC1CPQR application, or STPMIC1CPQR equivalent, this device supports precise multi-rail sequencing (Rank 0–3), I²C + digital IO control, NVM-programmable configurations, and low-power modes (370 µA STOP, 1.2 mA RUN) critical for wearable IoT, smart home hubs, and portable man-machine interfaces.

Technical Context

The STPMIC1CPQR implements an adaptive constant-on-time (COT) control architecture across its four buck converters, enabling fast transient response and high light-load efficiency via seamless PFM-to-PWM transition. Its integrated PLL synchronizes switching frequencies to reduce EMI, while programmable NVM defines default voltages, power-up sequence ranks, protection thresholds, and I²C slave address.

It features dedicated circuitry for DDR3/LPDDR2/3/4 memory support: REFDDR outputs VOUT2/2 (0.55 V typical), LDO3 operates in normal/sink-source/bypass modes for VTT termination, and BOOST supplies up to three USB ports (two 500 mA host + one 100 mA OTG) with battery or 5 V adapter input flexibility.

Key Specifications

Pinout & Package

Package: WFQFN-44L (5 mm × 6 mm × 0.8 mm, ePad exposed for thermal dissipation). Pin count: 44 terminals including 4 ground pins (PGND1–4, PGND5, AGND, GNDLDO, EPGND) and dedicated LX nodes for all 4 buck converters and boost stage.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS659422RHBR and RT5782AZSP, STPMIC1CPQR uniquely integrates DDR3 sink-source VTT, USB-aware boost + switches, and field-programmable NVM - reducing BOM count by ≥7 components and enabling true "set-and-forget" power configuration for STM32MP1-based designs.

Availability

STPMIC1CPQR is available at Aetrix Electronics and suitable for wearable IoT devices, smart home hubs, and portable human-machine interfaces requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for STPMIC1CPQR 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 with over 40 years of analog/mixed-signal design heritage.

The STPMIC1 product line targets high-integration application processors like STM32MP1, delivering scalable, NVM-configurable power solutions that replace 10+ discrete regulators while meeting stringent low-power and DDR memory interface requirements.

FAQ

What distinguishes STPMIC1CPQR from other STPMIC1 variants?

STPMIC1CPQR is the unprogrammed version of the STPMIC1 family, meaning its NVM contains no pre-defined voltage or sequencing settings - unlike STPMIC1APQR/BPQR/DPQR/EPQR which ship with factory-configured defaults for specific STM32MP1 SKUs. This allows full customization of output voltages, power-up ranks, protection thresholds, and I²C address via I²C reprogramming in final application, making it ideal for differentiated or proprietary MPU platforms.

How does the LDO3 sink-source mode function in DDR3 termination?

In sink-source mode, LDO3 regulates VREFDDR (VOUT2/2) and actively sources or sinks current to maintain DDR3 VTT termination voltage at exactly half the DDR I/O voltage - critical for signal integrity on high-speed memory buses. It supports ±120 mARMS continuous current with 30 mV load transient regulation, eliminating the need for external op-amp-based VTT circuits and reducing board area by >30% compared to discrete solutions.

Can STPMIC1CPQR support LPDDR4 memory?

Yes - STPMIC1CPQR supports LPDDR4 through its flexible BUCK3 and BUCK4 outputs (configurable to 1.1 V and 1.15 V respectively), REFDDR (0.55 V), and LDO3 in bypass or normal mode for VDDQ/VTT. While the datasheet emphasizes DDR3/LPDDR2/3 compatibility, the electrical specifications (output voltage range, accuracy, transient response) meet JEDEC LPDDR4 requirements for VDDQ (1.1 V ±3%), VDD2 (1.1 V), and VREF (0.55 V ±1%).

What thermal management features are built into STPMIC1CPQR?

STPMIC1CPQR includes programmable thermal monitoring with two thresholds: a warning flag (TWRN_Rise = 115–140 °C) for early system throttling and a hard shutdown (TSHDN_Rise = 140–160 °C) to prevent permanent damage. These thresholds are stored in NVM and can be adjusted via I²C. The WFQFN-44 package achieves θJA = 29 °C/W on a 2s2p JEDEC board, and the exposed pad (EPGND) must be soldered to a thermal copper plane for optimal heat dissipation in high-current applications.