STMicroelectronics STOD02PUR

Overview

STOD02PUR from STMicroelectronics is a dual-output DC-DC converter IC designed specifically for AMOLED display power management, integrating a synchronous step-up converter (4.6 V fixed output) and a programmable inverting converter (–2.3 V to –5.9 V via S-wire), operating from 2.5 V to 4.5 V input with 150 mA max output current per rail and 1.6 MHz PWM switching frequency.

For engineers reviewing the STOD02PUR datasheet, STOD02PUR pinout, STOD02PUR application, or STOD02PUR equivalent, this device is selected for compact, high-efficiency dual-rail bias generation in portable displays where low quiescent current (<1 µA shutdown), fast output discharge, and thermal protection are critical design requirements.

Technical Context

The STOD02PUR implements two independent synchronous DC-DC converters: a boost stage with fixed 4.6 V output and an inverting stage whose negative output voltage is set digitally via single-wire (S-wire) protocol across 10 discrete levels. It operates in pulse-skipping mode below 10 mA load and transitions to constant-frequency 1.6 MHz PWM above that threshold.

Both converters feature integrated high-side and low-side MOSFETs with confirmed R_DS(on) values (0.8–1.0 Ω P-ch, 0.4–1.0 Ω N-ch), soft-start with inrush control, overtemperature shutdown at 140 °C with 15 °C hysteresis, and a dedicated fast-discharge circuit (600 Ω internal resistor, 6 ms discharge time) activated upon shutdown.

Key Specifications

Pinout & Package

STOD02PUR is housed in a thermally enhanced DFN12L package (3 mm × 3 mm × 0.8 mm) with exposed pad internally connected to AGND/PGND, requiring PCB connection to both ground planes for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output AMOLED bias applications.

Compared with MAX17075ETE+ and TPS65136RGTR, STOD02PUR uniquely combines S-wire programmability, sub-6 ms fast discharge, and 1.6 MHz operation in a 3×3 mm DFN-making it optimal for dynamically adaptive, space-constrained AMOLED systems requiring zero-latency rail control.

Availability

STOD02PUR is available at Aetrix Electronics and suitable for AMOLED smartphone displays, portable media players, and digital still camera viewfinders requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for STOD02PUR 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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The STOD02PUR belongs to ST's display power management IC portfolio, engineered specifically for compact, high-efficiency dual-rail bias generation in battery-powered AMOLED applications with stringent size and thermal constraints.

FAQ

What is the function of the S-wire pin on STOD02PUR?

The S-wire pin implements a proprietary single-wire digital interface (400 kHz max) that allows an external MCU to select one of ten discrete negative output voltages (–2.3 V to –5.9 V) without external components. It uses open-drain signaling with a 150 kΩ pull-down resistor and requires the EN pin to be held low during programming. Each voltage level corresponds to a specific bit pattern defined in Table 9 of the datasheet.

How does STOD02PUR manage efficiency across varying load conditions?

STOD02PUR employs automatic mode switching: below 10 mA load, it enters pulse-skipping mode to minimize switching losses and achieve ultra-low quiescent current; above 10 mA, it transitions to fixed 1.6 MHz PWM mode for stable regulation and high efficiency (85 % typical at 30 mA). This dual-mode architecture maintains >80 % efficiency from 10 mA to 150 mA per rail.

Can STOD02PUR operate with input voltage below 2.5 V?

No. The absolute minimum operating input voltage is 2.5 V, enforced by an under-voltage lockout (UVLO) circuit with 2.50 V rising threshold and 2.35 V falling threshold. Operation below 2.5 V risks failure to regulate VO1 and VO2, and may trigger UVLO shutdown. The device will not start up if VINP/VINA rises below 2.40 V, and will shut down if voltage falls below 2.30 V.

What layout guidance is critical for thermal performance of STOD02PUR?

The exposed pad (internally connected to AGND/PGND) must be soldered to a dedicated thermal pad on the PCB, connected via ≥4 thermal vias (0.3 mm diameter) to inner-layer ground planes. PGND and AGND traces must be wide and short, with separate copper pours joined only at a single point near the IC. Inductor placement must avoid overlapping sensitive analog nodes (VREF, S-wire) to prevent noise coupling into the feedback path.