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STMicroelectronics STPS0520Z
- Part No.:
- STPS0520Z
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
STPS0520Z.pdf
- Description:
- DIODE SCHOTTKY 20V 500MA SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:104,305
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Product details
Overview
STPS0520Z from STMicroelectronics is a single Schottky rectifier optimized for low-voltage, high-frequency DC-DC converters and switch-mode power supplies. It features 20 V repetitive peak reverse voltage, 0.5 A average forward current at 25°C, 0.32 V maximum forward voltage at 0.5 A/100°C, 5.5 A non-repetitive surge current, and SOD-123 surface-mount package-enabling compact GSM and PCMCIA designs.
For engineers reviewing the STPS0520Z datasheet, STPS0520Z pinout, STPS0520Z application, or STPS0520Z equivalent, key selection criteria include conduction loss minimization (VF ≤ 0.32 V), negligible switching losses, thermal resistance (Rth(j-a) = 430 °C/W on epoxy board), and suitability for polarity protection and freewheeling in space-constrained 3.3 V/5 V systems.
Technical Context
This Schottky diode uses a platinum-silicide barrier structure to achieve ultra-low forward voltage and near-zero reverse recovery charge. Its 10,000 V/µs dV/dt rating supports stable operation in fast-switching topologies without snubbers.
Thermal performance is defined by junction-to-ambient resistance (430 °C/W standard layout; 210 °C/W with 50 mm² copper), and its 125 °C maximum junction temperature enables reliable operation in ambient temperatures up to 75 °C at full rated current (δ = 0.5).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum reverse blocking capability for 3.3 V/5 V rail protection and flyback clamp applications |
| IF(AV) | 0.5 A at Ta=25°C - Continuous DC output rectification capacity in compact DC-DC modules |
| VF (max) | 0.32 V at IF=0.5 A, Tj=100°C - Enables <150 mW conduction loss at 0.5 A, critical for efficiency in battery-powered devices |
| IR (max) | 8 mA at VR=VRRM, Tj=100°C - Low leakage preserves standby power integrity in always-on circuits |
| Rth(j-a) | 430 °C/W - Thermal limit defines safe derating curve: max 0.3 A at 75°C ambient on standard FR4 pad layout |
| dV/dt | 10,000 V/µs - Supports >1 MHz switching without oscillation or false turn-on in synchronous rectifier gate drives |
Pinout & Package
SOD-123 is a miniature surface-mount plastic package (3.55–3.95 mm length, 1.4–1.7 mm width, 1.45 mm height) with cathode band marking and 0.01 g unit weight. Optimized for automated placement and reflow soldering (260 °C/10 s max).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to input/source side in freewheeling or reverse polarity protection configurations |
| Cathode (Pin 2, banded end) | Forward current exit / reverse blocking terminal | Connected to load/ground; band identifies polarity during manual inspection and automated optical alignment |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VF | 0.32 V max at 0.5 A/100°C - Reduces conduction loss by >40% vs. comparable silicon diodes in 5 V buck outputs |
| Negligible switching losses | No reverse recovery charge (Qrr ≈ 0) - Eliminates switching loss component and EMI in >500 kHz converters |
| High dV/dt immunity | 10,000 V/µs - Prevents spurious conduction during fast edge transitions in half-bridge and LLC resonant circuits |
| Miniature SOD-123 footprint | 3.75 mm × 1.55 mm body - Fits PCB real estate constraints in mobile handsets and PCMCIA cards per JEDEC MO-203AA |
Applications
| USB Power Delivery Protection | GSM RF Power Amplifier Bias |
|---|---|
Use Scenario: Reverse polarity and overvoltage protection in USB-C PD sink ports with 5–20 V input range. IC Role / Device Role / Timing Role: Schottky OR-ing diode placed between input connector and DC-DC controller input. Use Value: 0.32 V VF ensures <160 mW loss at 0.5 A, preserving efficiency while enabling compact layout with no external TVS needed due to 20 V VRRM margin. | Use Scenario: DC bias feed and RF choke isolation for 2.4 GHz PA stages in GSM/GPRS handsets. IC Role / Device Role / Timing Role: Low-inductance DC feed path with minimal RF insertion loss and harmonic generation. Use Value: Negligible Qrr and 2.5 pF junction capacitance at 10 V enable clean DC coupling without degrading PA AC performance or stability. |
| PCMCIA Card Power Switching | Low-Voltage Freewheeling Diode |
Use Scenario: Hot-swap power sequencing and inrush limiting in Type II PCMCIA peripheral cards. IC Role / Device Role / Timing Role: Polarity guard and transient clamping element integrated into card-edge power interface. Use Value: SOD-123 footprint meets PCMCIA mechanical envelope; 5.5 A IFSM handles plug-in surge without derating. | Use Scenario: Freewheeling path in 3.3 V synchronous buck converter output stage (e.g., FPGA core supply). IC Role / Device Role / Timing Role: Secondary conduction path during high-side MOSFET off-time to maintain continuous inductor current. Use Value: 0.3 V VF at 0.1 A reduces freewheeling loss by 65% vs. 1N5819, directly improving light-load efficiency above 85%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Diodes Inc. SBM0520 | Same VRRM (20 V), IF(AV) = 0.5 A, VF = 0.34 V max at 0.5 A/100°C - 6% higher conduction loss | Identical SOD-123 package but 10% higher Rth(j-a) (470 °C/W) - requires larger copper area for same thermal margin | Acceptable where 20 mV VF penalty is tolerable and board layout allows extra thermal relief |
| Vishay SS12 | VRRM = 20 V, IF(AV) = 1.0 A, VF = 0.5 V max at 1 A/25°C - higher current rating but 56% higher VF at 0.5 A | SMA package (4.5 × 2.7 mm) - 2.3× larger footprint; not suitable for PCMCIA/GSM space constraints | Only viable when higher current headroom is required and board area permits SMA mounting |
Compared with SBM0520 and SS12, STPS0520Z delivers the lowest VF in SOD-123, enabling highest efficiency in space-limited 0.5 A applications-while SS12 trades efficiency for current headroom and SBM0520 adds thermal overhead without functional gain.
Availability
STPS0520Z is available at Aetrix Electronics and suitable for USB power delivery protection, GSM RF amplifier biasing, and PCMCIA card hot-swap circuits requiring stable component supply across high-mix, low-volume production runs.
Supply support for STPS0520Z 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
The STPS series targets high-efficiency, high-frequency rectification in portable and space-constrained power systems-emphasizing low VF, fast switching, and miniature packaging for battery-powered and communications equipment.
FAQ
What is the maximum allowable ambient temperature for continuous 0.5 A operation?
At 0.5 A average forward current and δ = 0.5 duty cycle, the maximum ambient temperature is 75 °C when mounted on an epoxy board with the recommended pad layout (Rth(j-a) = 430 °C/W). Derating is required above this temperature per Figure 2 in the datasheet.
Can STPS0520Z be used in place of a 1N5817 in a 5 V buck converter?
Yes-STPS0520Z replaces 1N5817 with superior performance: lower VF (0.32 V vs. 0.45 V), higher dV/dt rating (10,000 V/µs vs. ~1,000 V/µs), and smaller SOD-123 footprint. No layout change is needed if pad dimensions match JEDEC MO-203AA.
Is the SOD-123 package lead-free and RoHS-compliant?
Yes-STPS0520Z is manufactured in accordance with RoHS Directive 2011/65/EU and is lead-free. The device uses matte tin-plated leads and complies with JEDEC J-STD-020 moisture sensitivity level (MSL) 1 for unlimited floor life at ≤30 °C/60% RH.
Does STPS0520Z require a heatsink for 0.5 A operation?
No heatsink is required. At 0.5 A and 25 °C ambient, junction temperature rise is ~215 °C (0.5 A × 0.32 V × 430 °C/W), exceeding 125 °C rating-so derating is mandatory. With proper PCB copper area (50 mm²), Rth(j-a) drops to 210 °C/W, enabling full 0.5 A at ≤50 °C ambient.
STPS0520Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 500mA
- Voltage - Forward (Vf) (Max) @ If:
- 385 mV @ 500 mA
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 150 µA @ 20 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- 125°C (Max)
STPS0520Z FAQ
1.How can I place an order for STPS0520Z through Aetrix?
Please submit a Request for Quotation (RFQ) for STPS0520Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STPS0520Z reliable?
The price and inventory of STPS0520Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS0520Z is usually 5 days.
3.What payment methods are accepted for STPS0520Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS0520Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPS0520Z?
STPS0520Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPS0520Z order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STPS0520Z?
For technical support, including STPS0520Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS0520Z requirements.
6.How does Aetrix verify that STPS0520Z is sourced from the original manufacturer or authorized distributors?
All STPS0520Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STPS0520Z meets industry standards.
7.What is the process for return or replacement of STPS0520Z?
All STPS0520Z units undergo pre-shipment inspection (PSI). If there is an issue with STPS0520Z, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STPS0520Z part is unused and in its original packaging.
Return procedure for STPS0520Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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