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Vishay Siliconix SIC476ED-T1-GE3
- Part No.:
- SIC476ED-T1-GE3
- Manufacturer:
- Vishay Siliconix
- Package:
- PowerPAK® MLP55-27
- Datasheet:
-
SIC476ED-T1-GE3.pdf
- Description:
- IC REG BCK ADJ POWERPAK MLP55-27
- Quantity:
- Payment:
- Shipping:
Inventory:1,680
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Product details
Overview
SIC476ED-T1-GE3 from Vishay Siliconix is a 12 A, 4.5 V to 55 V input synchronous buck DC/DC converter with integrated high-side and low-side MOSFETs, adjustable 0.8 V output, internal compensation, and 2 MHz max switching frequency-designed for industrial computing, telecom power supplies, and robotics power rails.
For engineers reviewing the SIC476ED-T1-GE3 datasheet, SIC476ED-T1-GE3 pinout, SIC476ED-T1-GE3 application, or SIC476ED-T1-GE3 equivalent, this page delivers verified specifications, validated pin functions, real-world use cases, and confirmed alternative options for high-current, wide-input-voltage buck regulation.
Technical Context
The SIC476ED-T1-GE3 implements voltage-mode constant-on-time (COT) control with adaptive zero-current detection, enabling ultrafast transient response and stable operation with ceramic-only output capacitors. Its internal ramp generator eliminates need for external ESR networks, and valley-current OCP supports three programmable limits (50 %/75 %/100 %) via ILIMIT pin configuration.
It integrates dual N-channel MOSFETs in a thermally enhanced PowerPAK® MLP55-27L package, features programmable soft start (via SS capacitor), selectable operating modes (power-save or forced CCM), and full protection including OVP, UVP, SCP, OTP, and PGOOD with 25 μs blanking time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 55 V - supports direct connection to 12 V, 24 V, 48 V industrial and telecom rails without pre-regulation. |
| Output Current Rating | 12 A continuous - matches SiC476's highest current variant in the family; validated at TJ ≤ +125 °C. |
| Feedback Reference Voltage | 0.800 V ±0.8 mV (−40 °C to +125 °C) - enables precise output regulation down to 0.8 V with ±1 % accuracy over full temperature range. |
| Switching Frequency Range | 100 kHz to 2 MHz - set externally via resistor on fSW pin; supports high-density designs and EMI optimization. |
| Peak Efficiency | 98 % - achieved at mid-load with 24 V input / 12 V output; enabled by low RDS(on) integrated MOSFETs and optimized gate drive. |
| Valley Current Limit (Default) | 13 A - when ILIMIT tied to VDD; scalable to 9.75 A (float) or 6.5 A (AGND) for design margin or fault containment. |
| Thermal Shutdown Threshold | 150 °C (typ.) with 35 °C hysteresis - ensures safe recovery at ≥115 °C; OTP disabled during DCM to avoid false trips. |
Pinout & Package
Package: PowerPAK® MLP55-27L - 5 mm × 5 mm, 27-pin lead (Pb)-free exposed-pad QFN with thermal enhancement for high-power density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCIN | Internal regulator supply input | Bias source for VDD and VDRV; accepts 4.5–55 V; decoupled with 0.1 μF to AGND; allows lower-loss external bias if >5 V supplied. |
| 2 PGOOD | Open-drain power-good indicator | Asserts high-Z when VFB within ±10 % of target; requires external pull-up; 25 μs blanking prevents false triggers during transients. |
| 3 EN | Enable control input | High-voltage compatible (up to 55 V); internal weak pull-down prevents floating startup; no sequencing required with other supplies. |
| 4 BOOT | High-side gate driver bootstrap node | Connected via RC network to PHASE; 4.7 Ω min series resistor recommended to limit shoot-through risk during boot capacitor recharge. |
| 5,6 PHASE | High-side MOSFET source / low-side drain node | Switch-node return path; must be routed with minimal loop area to PGND to reduce EMI and switching losses. |
| 7,8,29 VIN | Main power stage input | Drain of high-side MOSFET; connects directly to bulk input capacitor; multiple pins reduce IR drop and improve thermal spreading. |
| 9,10,11,17,30 PGND | Power ground | Low-impedance return for high di/dt currents; must be connected to thermal pad and separated from AGND except at single point. |
| 12,13,14 SW | Switch node | Connects to inductor; shared with PHASE in layout; critical for EMI and efficiency; requires tight coupling to PGND plane. |
| 15 GL | Low-side gate driver output | Direct drive signal to low-side MOSFET gate; not user-accessible; optimized for fast turn-off to minimize body diode conduction. |
| 16 VDRV | Gate driver supply output | 5.3 V (typ.) LDO output; powers HS/LS drivers; decoupled with 4.7 μF to PGND; can be bypassed with external 5 V supply in Mode 3/4. |
| 19 SS | Soft-start timing input | Charged by internal 5 μA current source; sets ramp time via external capacitor; enables controlled inrush limiting and pre-bias safe startup. |
| 20 VOUT | Output voltage sense point | Internal ripple injection node; used for stability compensation; connects directly to output capacitor bank near load. |
| 22 VFB | Feedback input | Compares against 0.8 V reference; connects to resistor divider from VOUT to AGND; ±2 nA bias current minimizes divider error. |
| 23,28 AGND | Analog ground reference | Reference for feedback, mode, soft-start, and current-sense circuits; must be shorted together and connected to PGND under IC via wide copper. |
| 24 fSW | Frequency setting input | Resistor-to-AGND sets switching frequency (100 kHz–2 MHz); value calculated per VOUT-dependent equation in datasheet. |
| 25 ILIMIT | Current limit selection | Three-state logic: VDD = 100 % OCP (13 A), float = 75 % (9.75 A), AGND = 50 % (6.5 A); no external components needed. |
| 26 VDD | Bias supply output | 5 V (±5 %) LDO output; powers control logic; decoupled with 1 μF to AGND; UVLO threshold 4.0 V with 150 mV hysteresis. |
| 27 MODE | Operating mode selector | Four modes via resistor to AGND: Mode 1 (PSM enabled, VDRV on), Mode 2 (PSM disabled, VDRV on), Mode 3/4 (VDRV off, external 5 V required). |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range (4.5–55 V) | Eliminates need for intermediate pre-regulators in 12 V/24 V/48 V systems; supports battery-backed and PoE++ inputs. |
| Internally compensated architecture | Stable with any capacitor type (ceramic, polymer, electrolytic); removes requirement for ESR tuning networks and simplifies BOM. |
| Programmable light-load efficiency | Diode emulation + frequency foldback in power-save mode reduces no-load current to 156 μA and maintains <15 mV ripple. |
| Full fault protection suite | OCP (valley-current), OVP (120 %), UVP (20 %), SCP (hiccup), OTP (150 °C), UVLO, and PGOOD - all active without external components. |
| Pre-bias start-up support | Prevents reverse current flow and negative voltage spikes when output is pre-charged; essential for hot-swap and redundant power systems. |
Applications
| Industrial Computing Power Rails | Telecom Base Station DC-DC Conversion |
|---|---|
|
Use Scenario: Providing 12 V @ 10 A to FPGA I/O banks and peripheral controllers in ruggedized edge servers. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering tightly regulated, high-current rail with fast load-step response. Use Value: 98 % peak efficiency reduces thermal load in confined chassis; 2 MHz capability shrinks inductor size by >40 % vs. 500 kHz solutions. |
Use Scenario: Converting -48 V telecom rectified input to +12 V for RF amplifier bias and digital control subsystems. IC Role / Device Role / Timing Role: High-voltage-input synchronous buck converter handling wide line variation and burst-mode traffic loads. Use Value: 55 V absolute max rating accommodates transient surges; valley-current OCP ensures reliable protection during antenna VSWR faults. |
| Robotics Motor Drive Auxiliary Supply | ATM/Vending Machine Main 5 V Rail |
|
Use Scenario: Generating clean 5 V @ 8 A for microcontroller, sensors, and communication interfaces in autonomous mobile robots. IC Role / Device Role / Timing Role: Compact, high-efficiency point-of-load regulator mounted near MCU; supports dynamic voltage scaling. Use Value: Internal compensation enables ceramic-only output caps (64 μF total), reducing board area by 35 % vs. electrolytic-based designs. |
Use Scenario: Delivering robust 5 V @ 6 A to bill acceptor, display, and cash dispenser modules in unattended kiosks. IC Role / Device Role / Timing Role: Primary DC-DC converter with brown-out immunity, pre-bias startup, and hiccup-mode SCP for field reliability. Use Value: 4 μA shutdown current extends battery backup runtime; PGOOD flag enables graceful system shutdown during AC loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 36 V max input, 0.8 A output, fixed 2 MHz frequency, no internal MOSFETs - requires external high-side switch. | Targeted at low-power IoT nodes; lacks OVP/UVP/OTP and cannot scale to 12 A loads. | Select only for sub-1 A, ≤36 V applications where cost and footprint outweigh performance and integration needs. |
| TPS54560BQPWPRQ1 | 60 V max input, 5 A output, external MOSFETs, adjustable frequency (100 kHz–2.5 MHz), automotive-grade (-40 °C to +125 °C). | Designed for automotive infotainment and ADAS; requires external gate drivers and current-sense resistors. | Choose when AEC-Q100 qualification and 5 A output suffice; avoid when 12 A integration, ceramic-cap stability, or simplified layout are mandatory. |
Compared with MP2451DT-LF-Z and TPS54560BQPWPRQ1, the SIC476ED-T1-GE3 delivers 2.4× higher current in same MLP55-27L footprint, eliminates external power stage components, and guarantees stability with zero-ESR ceramics - making it optimal for space-constrained, high-reliability industrial power designs.
Availability
SIC476ED-T1-GE3 is available at Aetrix Electronics and suitable for industrial computing, telecom base station power supplies, and robotics motor drive auxiliary rails requiring stable component supply across extended temperature and long production lifecycles.
Supply support for SIC476ED-T1-GE3 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
Vishay Siliconix is a global leader in discrete semiconductors and passive components, specializing in high-efficiency power management ICs and advanced MOSFET technologies for demanding industrial and computing applications.
The SiC47x family-including SIC476ED-T1-GE3-is engineered for wide-input-voltage, high-current synchronous buck conversion in space-constrained environments where thermal performance, light-load efficiency, and fault resilience are critical.
FAQ
What is the maximum input voltage rating for the SIC476ED-T1-GE3?
The SIC476ED-T1-GE3 has an absolute maximum input voltage (VIN) rating of 60 V, with recommended operation from 4.5 V to 55 V. Exceeding 55 V may trigger internal UVLO or degrade long-term reliability; operation at 60 V is limited to transient conditions per datasheet stress ratings.
Does the SIC476ED-T1-GE3 require external compensation components?
No, the SIC476ED-T1-GE3 is internally compensated and stable with any output capacitor type-including zero-ESR ceramic capacitors-without external RC networks. This eliminates tuning complexity and reduces BOM count versus traditional voltage-mode or current-mode controllers.
How is the output current limit configured on the SIC476ED-T1-GE3?
The SIC476ED-T1-GE3 valley-current OCP threshold is set via the ILIMIT pin: tying to VDD selects 100 % (13 A), leaving floating selects 75 % (9.75 A), and connecting to AGND selects 50 % (6.5 A). No resistors or additional circuitry are required for these configurations.
Can the SIC476ED-T1-GE3 operate with a pre-biased output?
Yes, the SIC476ED-T1-GE3 supports pre-bias start-up. If the FB voltage exceeds the internal soft-start ramp at power-on, the controller inhibits switching to prevent reverse current through the low-side MOSFET and avoid output voltage collapse or overshoot.
What package type and thermal characteristics does the SIC476ED-T1-GE3 use?
The SIC476ED-T1-GE3 uses the PowerPAK® MLP55-27L package-a 5 mm × 5 mm, 27-pin lead-free QFN with exposed thermal pad. It features 2 °C/W junction-to-case and 12 °C/W junction-to-ambient thermal resistance, enabling 12 A operation with standard 2-layer PCB copper pours.
SIC476ED-T1-GE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- microBUCK®
- Package/Case:
- PowerPAK® MLP55-27
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 55V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 24V
- Current - Output:
- 12A
- Frequency - Switching:
- 100kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerPAK® MLP55-27
SIC476ED-T1-GE3 FAQ
1.How can I place an order for SIC476ED-T1-GE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIC476ED-T1-GE3 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 SIC476ED-T1-GE3 reliable?
The price and inventory of SIC476ED-T1-GE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SIC476ED-T1-GE3 is usually 5 days.
3.What payment methods are accepted for SIC476ED-T1-GE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIC476ED-T1-GE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIC476ED-T1-GE3?
SIC476ED-T1-GE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIC476ED-T1-GE3 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 SIC476ED-T1-GE3?
For technical support, including SIC476ED-T1-GE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIC476ED-T1-GE3 requirements.
6.How does Aetrix verify that SIC476ED-T1-GE3 is sourced from the original manufacturer or authorized distributors?
All SIC476ED-T1-GE3 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 SIC476ED-T1-GE3 meets industry standards.
7.What is the process for return or replacement of SIC476ED-T1-GE3?
All SIC476ED-T1-GE3 units undergo pre-shipment inspection (PSI). If there is an issue with SIC476ED-T1-GE3, 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 SIC476ED-T1-GE3 part is unused and in its original packaging.
Return procedure for SIC476ED-T1-GE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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