STMicroelectronics STPS0520M

Overview

STPS0520M from STMicroelectronics is a low-drop single Schottky rectifier in STmite (DO-216AA) package, rated for 0.5 A average forward current, 20 V repetitive peak reverse voltage, and 0.30 V max forward voltage at 100°C. It delivers negligible switching losses and supports high-frequency DC–DC converters in battery-powered portable electronics.

For engineers reviewing the STPS0520M datasheet, STPS0520M pinout, STPS0520M application, or STPS0520M equivalent, key selection criteria include its 20 °C/W junction-to-case thermal resistance, 150°C max junction temperature, avalanche capability up to 1400 W (1 µs), and suitability for polarity protection and freewheeling in space-constrained designs.

Technical Context

This Schottky diode operates with metal–semiconductor junction architecture enabling ultrafast recovery (no minority carrier storage), zero reverse recovery charge, and conduction loss modeled as P = 0.21 × IF(AV) + 0.175 × IF²(RMS). Its 10,000 V/µs dV/dt rating ensures stability under fast transient conditions.

Thermal performance is defined by Rth(j–c) = 20 °C/W (mounted per recommended FR4 pad), Rth(j–a) = 250 °C/W (unheatsinked), and specified avalanche energy derating versus pulse duration and junction temperature-critical for overload robustness in SMPS output stages.

Key Specifications

Pinout & Package

STPS0520M uses the STmite (DO-216AA) surface-mount package: an ultra-compact, molded plastic case with two terminals-cathode and anode-on a single-side gull-wing leadframe. Dimensions: 1.90 mm × 1.90 mm × 0.75 mm (L × W × H), weight 15.5 mg.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS12 and RB520S-30, STPS0520M uniquely combines 0.5 A current capability, 20 V blocking, sub-0.3 V VF at operating temperature, and certified avalanche energy-making it the sole choice for thermally constrained, high-reliability 5–12 V DC–DC outputs.

Availability

STPS0520M is available at Aetrix Electronics and suitable for USB PD adapters, portable device battery protection circuits, PCMCIA card power sequencing, and low-voltage DC–DC converter output stages requiring stable component supply across production lifecycles.

Supply support for STPS0520M 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, designing and manufacturing analog, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.

STPS0520M belongs to ST's STmite Schottky rectifier product line, engineered specifically for miniaturized, high-efficiency power conversion in battery-powered and space-limited applications.

FAQ

What is the maximum allowable ambient temperature for STPS0520M at 0.5 A average current?

At IF(AV) = 0.5 A with δ = 0.5, Figure 2 shows the maximum ambient temperature is approximately 75°C on FR4 PCB with minimum recommended copper pad. This assumes Rth(j–a) = 250 °C/W and Tj(max) = 150°C. Derating is required above this point to maintain junction temperature within limit.

Does STPS0520M require a heatsink for 0.5 A continuous operation?

No external heatsink is required. With Rth(j–c) = 20 °C/W and typical PCB copper area, junction temperature rise is ~10°C above case temperature at 0.5 A. The device relies on PCB copper as its primary thermal path; heatsinking is unnecessary unless ambient exceeds 75°C or airflow is restricted.

Is STPS0520M suitable for synchronous rectification replacement?

No-it is a passive Schottky rectifier, not a controlled switch. While it provides zero reverse recovery and low VF, it cannot be actively gated like a MOSFET. It serves best in non-synchronous topologies or as a cost-effective alternative where gate drive complexity must be avoided.

What is the reverse leakage current at 100°C and 20 V reverse bias?

Per Table 5, IR = 2–6 mA at Tj = 100°C and VR = VRRM = 20 V. This elevated leakage is inherent to Schottky physics but remains within specification and does not compromise blocking function in typical 5–12 V systems where reverse voltage rarely reaches full VRRM.