STMicroelectronics STNRG288ATR

Overview

STNRG288ATR from STMicroelectronics is a digital power controller IC designed for AC-DC and isolated DC-DC converters, integrating an STM8® microcontroller core, six SMED-based PWM generators (10 ns event response, 1.3 ns resolution), four analog comparators (<50 ns propagation), and a 10-bit ADC with 12-bit equivalent resolution via programmable gain. It operates across –40 °C to 105 °C and targets high-efficiency server PSUs and telecom rectifiers.

For engineers reviewing the STNRG288ATR datasheet, STNRG288ATR pinout, STNRG288ATR application, or STNRG288ATR equivalent, this page delivers verified technical context, validated pin functions, confirmed alternative controllers for digital power designs, and supply-ready availability details - all grounded in ST's production datasheet DocID027799 Rev 3.

Technical Context

The STNRG288ATR implements a dual-domain architecture: a 16 MHz STM8® CPU handles system control and communication, while six independent State Machine Event Driven (SMED) modules execute real-time PWM generation with sub-ns timing precision. Each SMED supports single/coupled modes and accepts up to three internal/external events for adaptive switching control.

Analog subsystems include four comparators with configurable hysteresis and <50 ns latency, plus an 8-channel 10-bit SAR ADC (extendable to 12-bit effective resolution via x1/x4 programmable gain). Clocking relies on a 96 MHz PLL, trimmable 16 MHz RC oscillator, and 153.6 kHz low-power RC source - all monitored by a clock security system.

Key Specifications

Pinout & Package

TSSOP38 package: 38-pin thin shrink small outline package with 0.65 mm pitch, JEDEC MO-153 compliant, optimized for automated assembly and thermal performance in compact power modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital power controller applications.

Compared with UCC28950 and ICE2PCS01, STNRG288ATR provides unified digital control across PFC and isolated DC-DC stages, on-chip event-driven protection, and firmware-upgradable functionality - reducing BOM count and enabling adaptive power management not possible with fixed-function alternatives.

Availability

STNRG288ATR is available at Aetrix Electronics and suitable for server PSUs, telecom rectifiers, and industrial UPS systems requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.

Supply support for STNRG288ATR 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog components for industrial, automotive, and consumer markets.

STNRG288ATR belongs to the STNRGxxxA family of digital power controllers, engineered specifically for high-efficiency, software-defined AC-DC and isolated DC-DC conversion - emphasizing real-time adaptability, integrated protection, and reduced external component count.

FAQ

Is STNRG288ATR pin-compatible with STNRG388A?

No. STNRG288ATR uses the TSSOP38 package but has a distinct pin assignment versus STNRG388A - confirmed by ST's official pin description tables (Section 6.2, DocID027799 Rev 3). Key differences include relocated SMED outputs and redefined analog input mappings; direct substitution requires PCB redesign.

Does STNRG288ATR support USB-based programming?

No. STNRG288ATR supports SWIM (Single Wire Interface Module) for debug and programming via dedicated SWIM pin (Pin 1), not USB. A ST-LINK/V2 or compatible SWIM adapter is required - no native USB interface or CDC-class bootloader is implemented.

What is the maximum achievable switching frequency using SMED modules?

Each SMED module supports PWM frequencies up to 2 MHz, verified by ST's timing analysis in Section 5.1.3 (DocID027799 Rev 3). This is enabled by the 96 MHz PLL clock domain and 1.3 ns resolution, making it suitable for GaN-based high-frequency resonant converters.

Can STNRG288ATR operate without an external crystal?

Yes. STNRG288ATR can run entirely from its internal 16 MHz RC oscillator (trimmable ±1 %) and 153.6 kHz low-power RC source - no external crystal is mandatory. The HSE input (Pin 3) is optional and used only when higher clock accuracy or jitter performance is required.