STMicroelectronics STODD03PQR

Overview

STODD03PQR from STMicroelectronics is a monolithic 2-channel power management IC for Blu-ray optical disc drives, integrating a 3.3 V/700 mA step-down converter, a 6.5–14 V/500 mA adjustable step-up converter, and a 1 A motor control power switch in QFN16 (4 × 4 mm). It features 1.2 MHz current-mode PWM, ±2% step-down and ±3% step-up output tolerance, synchronous rectification, and true shutdown for laser supply sequencing.

For engineers reviewing the STODD03PQR datasheet, STODD03PQR pinout, STODD03PQR application, or STODD03PQR equivalent, this device supports high-density ODD designs requiring tightly regulated dual-rail power with integrated motor drive - especially where compact size, thermal efficiency, and precise enable-controlled sequencing are critical.

Technical Context

The STODD03PQR implements two independent DC-DC channels: a fixed 3.3 V buck converter (1.2 MHz, 700 mA) with internal NMOS/PMOS switches (R_DS(on) = 0.2 Ω / 0.3 Ω), and an adjustable boost converter (6.5–14 V, 500 mA) with 0.8 V feedback reference and true cutoff. Both channels use current-mode PWM topology for fast transient response and low output ripple.

A dedicated 1 A integrated power switch supports motor control, enabled via active-low EN-SW with verified truth-table behavior. Thermal protection (130–150 °C shutdown, 15 °C hysteresis), soft-start, and peak-current limiting ensure robust operation under load transients and fault conditions.

Key Specifications

Pinout & Package

STODD03PQR is housed in a thermally enhanced QFN16 (4 × 4 mm, 0.65 mm pitch) with exposed thermal pad (EPAD) requiring direct connection to PCB ground plane via multiple vias for junction-to-ambient thermal resistance of 46 °C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-rail optical drive power management applications.

Compared with TPS65132A1YFFR and RT8070ZSP, STODD03PQR uniquely integrates laser-adjustable boost, logic buck, and motor switch in one QFN16 package - making it the only single-chip solution validated for BD-RE power architecture with true shutdown and sequencing control.

Availability

STODD03PQR is available at Aetrix Electronics and suitable for Blu-ray optical drive manufacturing, embedded storage controller design, and high-density consumer electronics requiring stable component supply with long-lifecycle support.

Supply support for STODD03PQR 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, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer markets.

The STODD03 belongs to ST's Optical Storage Power Management product line, engineered specifically to consolidate power rails and motor drive functions in next-generation Blu-ray and HD-DVD platforms while meeting strict thermal, size, and sequencing requirements.

FAQ

What is the maximum allowable input voltage for STODD03PQR?

The absolute maximum input voltage is 7 V across all supply pins (VIN_P, VIN_A, VIN_PSW), but the functional operating range is strictly 4 V to 6 V per electrical characteristics. Exceeding 6 V risks violating the 1.2 V enable thresholds and may trigger overvoltage protection on the step-up output, causing uncontrolled shutdown.

Can STODD03PQR generate a 9 V step-up output reliably?

Yes - the step-up output is adjustable from 6.5 V to 14 V using external resistors R1 and R2 on FB1, with 0.8 V internal reference. For 9 V, a 33 kΩ/3.3 kΩ divider yields ±3% accuracy across temperature (0–85 °C), confirmed in Table 8 and Figure 3 of the datasheet.

Is the PSWOUT pin internally current-limited?

No - PSWOUT has no internal current limiting. The datasheet explicitly states "PSWOUT output current is not internally limited. Do not exceed 1 A max." External current sensing or a series fuse is required for motor overcurrent protection, especially during stall or startup.

How does the EN-SW pin interact with EN1 for step-up control?

Per Table 6, step-up output is active only when EN1 > 1.2 V AND EN-SW is low. If EN-SW is high, step-up remains off regardless of EN1 state - this dual-enable scheme ensures fail-safe laser deactivation during motor faults or system resets.