STMicroelectronics STOD02TPUR

Overview

STOD02TPUR from STMicroelectronics is a dual 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, delivering up to 150 mA per rail with 85 % typical efficiency at 30 mA load.

For engineers reviewing the STOD02TPUR datasheet, STOD02TPUR pinout, STOD02TPUR application, or STOD02TPUR equivalent, key selection criteria include its dual-rail programmability, 1.6 MHz PWM switching frequency, true shutdown mode (<1 µA quiescent current), soft-start with inrush protection, and integrated thermal shutdown-critical for compact, battery-powered portable displays.

Technical Context

The STOD02TPUR implements two independent synchronous DC-DC topologies: a boost converter with fixed 4.6 V output and an inverting buck-boost converter whose negative output voltage is set via a single-wire digital interface (S-wire) supporting 10 discrete levels from –2.3 V to –5.9 V. It operates in pulse-skipping mode below 10 mA and transitions to constant-frequency 1.6 MHz PWM above that threshold.

Its dual-path architecture shares no internal power stages-LX1 and LX2 are isolated switching nodes driving separate external inductors (4.7 µH each), while VO1 and VO2 provide regulated outputs referenced to distinct ground domains (PGND and AGND). The exposed thermal pad connects internally to AGND/PGND, requiring PCB-level grounding for thermal and electrical integrity.

Key Specifications

Pinout & Package

STOD02TPUR is housed in a thermally enhanced DFN12L package measuring 3 mm × 3 mm × 0.6 mm, featuring an exposed thermal pad electrically tied to AGND/PGND and requiring solder connection to PCB ground plane for optimal thermal performance and noise immunity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-rail AMOLED power supply applications.

Compared with MAX1710EEG+T and TPS65136RGTR, STOD02TPUR uniquely combines S-wire simplicity, ultra-low shutdown current, and optimized 1.6 MHz operation for minimal external component count-making it ideal for space-constrained, battery-sensitive AMOLED designs where dynamic bias control adds tangible power savings.

Availability

STOD02TPUR is available at Aetrix Electronics and suitable for AMOLED smartphone displays, portable media players, and digital still cameras requiring stable component supply, consistent parametric performance across temperature, and long-term production continuity.

Supply support for STOD02TPUR 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 management ICs, sensors, and analog devices for automotive, industrial, and consumer markets.

The STOD02TPUR belongs to ST's display power management product line, engineered specifically to replace discrete charge-pump and inductor-based solutions in portable AMOLED systems with integrated, efficient, and programmable dual-rail conversion.

FAQ

What is the function of the exposed thermal pad on the STOD02TPUR DFN package?

The exposed pad is internally connected to both AGND and PGND pins and must be soldered to a dedicated PCB copper pour tied to system ground. This provides critical thermal dissipation (R_thJA = 49.1 °C/W) and reduces ground impedance for switching noise suppression-omitting this connection risks thermal shutdown and output instability.

How does the S-wire interface configure the negative output voltage?

The S-wire pin accepts a unidirectional Manchester-encoded serial signal (400 kHz max) from an MCU to select one of 10 preset VO2 levels (–2.3 V to –5.9 V). The EN pin must be held low during programming; once configured, VO2 remains stable until reprogrammed or device reset.

Can STOD02TPUR operate with only the positive rail enabled?

Yes-driving EN high while holding S-wire high (or floating with pull-up) delivers the default –4.9 V VO2 output, but the inverting converter remains active. To disable VO2 entirely, EN must be low and S-wire driven low per Table 10, placing the device in full shutdown with <1 µA total current draw.

What external components are mandatory for basic STOD02TPUR operation?

Minimum required components are: two 4.7 µH shielded inductors (L1, L2), one 4.7 µF input ceramic capacitor (CIN), two 4.7 µF output ceramics (C01, C02), one 1 µF reference capacitor (Cref), and a 150 kΩ pull-up on S-wire. No resistive feedback network is needed-the outputs are internally regulated.