My Inquiry
My Account
Semtech Corporation SC4503WLTRT
.jpg)
- Part No.:
- SC4503WLTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
SC4503WLTRT.pdf
- Description:
- IC REG BOOST ADJ 1.4A 8MLPD
- Quantity:
- Payment:
- Shipping:
Inventory:3,169
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SC4503WLTRT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines. It delivers ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and stable 27.5–28V clamping across temperature and current range. It protects USB Type-C power delivery buses and load switch inputs in industrial and IoT equipment.
For engineers reviewing the SC4503WLTRT datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, DFN-6 package layout guidance, functional role in surge shunting, and real-world design trade-offs versus conventional TVS diodes.
Technical Context
The SC4503WLTRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown. Unlike standard TVS diodes, its clamping voltage remains nearly constant-27.5–28V at 24A and 40A-due to decreasing RDS(on) under surge conditions.
It operates from −40°C to +125°C with <20mΩ dynamic resistance, 175pF junction capacitance at 22V, and reverse leakage under 600nA. Its 6-pin DFN (1.6×1.6×0.55mm) integrates three parallel input terminals (pins 4–6) and three ground terminals (pins 1–3) to maximize surge current handling and minimize parasitic inductance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays flat across full surge range, enabling predictable downstream IC protection. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 22V power rail protection without signal integrity impact. |
| Dynamic Resistance | 20mΩ - ensures minimal voltage rise during high di/dt transients, critical for fast-rising surges. |
| Operating Temp | −40°C to +125°C - supports extended-range industrial and automotive under-hood applications. |
Pinout & Package
SC4503WLTRT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with UL 94V-0 molding compound. The compact footprint enables placement directly at connectors with minimal PCB area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Parallel ground terminals - must all be connected to low-inductance ground plane via multiple vias for full 40A surge capability. |
| Pins 4, 5, 6 | IN | Parallel input terminals - connect directly to protected line (e.g., VBUS in USB-C); all three required for rated performance. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables flat clamping voltage vs. current and temperature-unlike voltage-dependent TVS diodes. |
| Triple-terminal input & ground | Distributes surge current across 3 pins each, reducing trace heating and parasitic inductance in PCB layout. |
| Low dynamic resistance (20mΩ) | Minimizes IR drop during fast transients, preserving clamping accuracy at high di/dt rates. |
| Stable 175pF capacitance | Prevents resonance or filtering effects on 22V power rails while maintaining robust ESD response. |
| −40°C to +125°C operation | Validated clamping and leakage performance across full industrial temperature range-no derating needed. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBUS lines in USB-C ports supporting up to 100W PD negotiation. IC Role / Device Role / Timing Role: Transient diverting suppressor that shunts lightning-induced surges and ESD before they reach the PD controller or buck converter. Use Value: Maintains 27.5–28V clamping across −40°C to +125°C, preventing overvoltage damage to sensitive PD controllers where conventional TVS would exceed safe thresholds at elevated temperatures. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in remote meters and robotics. IC Role / Device Role / Timing Role: Primary front-end EOS protector placed between connector and load switch input, limiting transient voltage to below the switch's absolute maximum rating. Use Value: Prevents latch-up or gate oxide damage in load switches during 1kV/42Ω IEC 61000-4-5 surges-enabled by sub-28V clamping independent of ambient temperature. |
| IoT Edge Node Power Rail Protection | Storage Device DC Bus Protection |
Use Scenario: Securing 22V auxiliary rails in battery-backed IoT gateways exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Solid-state transient suppressor replacing bulkier TVS arrays, integrated directly at board edge connectors. Use Value: Delivers 40A surge handling in 1.6×1.6mm footprint-reducing board space by >50% versus discrete TVS solutions while maintaining flat clamping behavior. |
Use Scenario: Protecting 22V DC input rails in NVMe SSD enclosures and enterprise storage backplanes. IC Role / Device Role / Timing Role: High-energy EOS clamp for hot-plug and cable-disconnect transients on storage subsystem power inputs. Use Value: Ensures reliable operation under repeated 8/20μs surges up to 1120W peak power-validated per IEC 61000-4-5 with no parameter drift after stress testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Same die, identical electrical specs and package; SC4503WLTRT is Semtech's alternate ordering code for TDS2211P. | No functional difference; used interchangeably in BOMs and schematics. | Select SC4503WLTRT for tape-and-reel procurement at Aetrix; TDS2211P may be sourced via alternate channels. |
| SMAJ22A | Standard unidirectional TVS diode; 22V standoff, 35.5V min clamping at 12.3A (8/20μs), higher dynamic resistance (~0.5Ω). | Clamping rises with current and temperature-reaches ~42V at 40A and 125°C-limiting use in thermally constrained designs. | Choose only if cost sensitivity outweighs clamping stability; requires thermal derating and larger layout margin. |
Compared with SMAJ22A, SC4503WLTRT offers 14V lower clamping at 40A and zero temperature drift, enabling robust protection in compact, high-temp industrial layouts; versus TDS2211P, it is functionally identical with identical sourcing and qualification status.
Availability
SC4503WLTRT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT edge node power rails requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/WEEE compliance.
Supply support for SC4503WLTRT 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
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in high-performance analog and mixed-signal ICs for precision sensing, protection, and signal integrity.
SC4503WLTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-energy EOS applications demanding flat clamping, wide temperature stability, and compact form factor.
FAQ
What is the exact package type and dimensions of SC4503WLTRT?
SC4503WLTRT uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed pad-less construction. Pin 1 is marked by a laser dot; pins 1–3 are GND, pins 4–6 are IN. The package is Pb-free, halogen-free, and RoHS/WEEE compliant with UL 94V-0 flammability rating.
How does SC4503WLTRT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), SC4503WLTRT maintains a near-constant 27.5–28V clamping voltage from 1A to 40A due to its FET-based shunt architecture and decreasing RDS(on). This eliminates thermal derating concerns at high ambient temperatures.
Can SC4503WLTRT protect both power and data lines?
SC4503WLTRT is optimized for 22V power rail and high-current I/O line protection-not high-speed data lines. Its 175pF junction capacitance makes it unsuitable for USB SuperSpeed or PCIe signals. For data line protection, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF) alongside SC4503WLTRT in hybrid protection schemes.
What is the maximum surge energy SC4503WLTRT can handle per IEC 61000-4-5?
SC4503WLTRT is rated for 1120W peak pulse power (tp = 8/20μs) and 40A peak pulse current. At ±1kV (1.2/50μs voltage, 8/20μs current, RS = 42Ω), it meets Level 4 industrial surge immunity. Energy handling is validated across −40°C to +125°C with no parameter shift after repeated stress cycles.
Is SC4503WLTRT pin-compatible with other Semtech TDS devices?
SC4503WLTRT shares the same 6-pin DFN footprint and pinout (GND on pins 1–3, IN on pins 4–6) with TDS2211P and TDS2411P. However, TDS2411P has 24V working voltage and different clamping characteristics-direct substitution requires verification of system voltage margins and surge profile compatibility.
SC4503WLTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 27V
- Current - Output:
- 1.4A (Switch)
- Frequency - Switching:
- 1.3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MLPD-W (2x2)
SC4503WLTRT FAQ
1.How can I place an order for SC4503WLTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC4503WLTRT 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 SC4503WLTRT reliable?
The price and inventory of SC4503WLTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC4503WLTRT is usually 5 days.
3.What payment methods are accepted for SC4503WLTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC4503WLTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC4503WLTRT?
SC4503WLTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC4503WLTRT 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 SC4503WLTRT?
For technical support, including SC4503WLTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC4503WLTRT requirements.
6.How does Aetrix verify that SC4503WLTRT is sourced from the original manufacturer or authorized distributors?
All SC4503WLTRT 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 SC4503WLTRT meets industry standards.
7.What is the process for return or replacement of SC4503WLTRT?
All SC4503WLTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC4503WLTRT, 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 SC4503WLTRT part is unused and in its original packaging.
Return procedure for SC4503WLTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC4503WLTRT Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
