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Vishay Siliconix SIC461ED-T1-GE3
- Part No.:
- SIC461ED-T1-GE3
- Manufacturer:
- Vishay Siliconix
- Package:
- PowerPAK® MLP55-27
- Datasheet:
-
SIC461ED-T1-GE3.pdf
- Description:
- IC REG BCK ADJ POWERPAK MLP55-27
- Quantity:
- Payment:
- Shipping:
Inventory:1,808
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Product details
Overview
SIC461ED-T1-GE3 from Vishay Siliconix is a 10 A, 4.5 V to 60 V input synchronous buck DC/DC converter with integrated high-side and low-side MOSFETs, adjustable 0.8 V output, 2 MHz max switching frequency, and voltage-mode constant-on-time (COT) control - used in industrial computing power rails and telecom intermediate bus converters.
For engineers reviewing the SIC461ED-T1-GE3 datasheet, SIC461ED-T1-GE3 pinout, SIC461ED-T1-GE3 application, or SIC461ED-T1-GE3 equivalent, key selection criteria include its 10 A continuous current rating, programmable valley current limit via ILIMIT pin, ±1 % output voltage accuracy over –40 °C to +125 °C, ultrasonic mode enable/disable via ULTRASONIC pin, and MLP55-27L package thermal resistance of 2 °C/W junction-to-case.
Technical Context
The SIC461ED-T1-GE3 implements a voltage-mode COT architecture with adaptive zero-current detection for diode emulation in DCM, enabling high light-load efficiency without external sensing resistors. Its on-time generator delivers fixed tON (90–110 ns min) while adjusting off-time dynamically based on feedback error and injected ripple (VSNS).
Control loop stability is maintained across ceramic, polymer, and electrolytic output capacitors via dual-path compensation: FB pin for DC regulation (0.8 V reference), VSNS pin for transient feed-forward with externally tuned VRAMP network (Rx/Cx/Cy). The device supports three operation modes (forced CCM, power-save, ultrasonic) selected by MODE pin resistor value.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 60 V - supports unregulated wall adapters, 48 V telecom, and industrial 24/36 V rails without pre-regulation |
| Output Current | 10 A continuous - rated for SiC461 variant; confirmed by OCP specification with RILIM = 60 kΩ yielding 10.4–15.6 A valley limit |
| Output Voltage Accuracy | ±1 % at –40 °C to +125 °C - ensures stable core voltage for FPGAs and ASICs under thermal stress |
| Switching Frequency | 100 kHz to 2 MHz - set by resistor on fSW pin; enables EMI optimization and compact magnetics design |
| Feedback Reference | 0.800 V ±4 mV - precision internal reference enables accurate 1.0 V, 1.2 V, or 1.8 V outputs using standard resistor dividers |
| Peak Efficiency | 98 % - achieved at mid-load with 48 VIN/5 VOUT, minimizing thermal derating in dense PCB layouts |
| Shutdown Current | 4–8 μA - ultra-low quiescent draw enables always-on subsystems in battery-backed equipment |
Pinout & Package
Package: PowerPAK® MLP55-27L - 5 mm × 5 mm, 27-pin lead-free QFN with exposed thermal pad; junction-to-case thermal resistance = 2 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCIN (1) | Bias supply input | Accepts 4.5–60 V; powers internal VDD/VDRV LDOs; requires RC filter to VIN and 0.1 μF AGND decoupling |
| PGOOD (2) | Open-drain status flag | Asserts high-Z when VOUT is within ±10 % regulation; needs external pull-up for system power sequencing |
| EN (3) | Enable control | High-voltage compatible (0–60 V); logic-high >1.35 V enables regulator; internal 5–9 MΩ AGND pull-down prevents floating |
| BOOT (4) | High-side gate driver supply | Connects via series R-C (R ≥ 4.7 Ω recommended) to PHASE; supplies charge for HS MOSFET turn-on |
| PHASE (5,6) | HS drain / LS source node | Switching node connecting integrated MOSFETs; requires low-inductance layout to PGND and VIN |
| VIN (7,8,29) | Main power input | Drain of HS MOSFET; must be decoupled with low-ESR capacitors placed near PGND pads |
| PGND (9,10,11,17,30) | Power ground return | Common return for HS/LS MOSFETs and input/output capacitors; separate from AGND plane |
| SW (12,13,14) | Switch node | Direct connection to inductor; critical for EMI and efficiency; must avoid routing under IC body |
| GL (15) | Low-side gate driver output | Drives LS MOSFET gate; not user-accessible; optimized for fast turn-off to reduce shoot-through |
| VDRV (16) | Gate driver supply | Internal LDO output (4.75–5.55 V); requires 4.7 μF PGND decoupling; can be bypassed with external 5 V supply |
| ULTRASONIC (18) | Ultrasonic mode control | Tie to VDD to enforce >20 kHz minimum frequency; float to allow sub-audible operation down to ~100 Hz |
| SS (19) | Soft-start timing | Internal 3–7 μA current charges external capacitor; sets output ramp time and limits inrush current |
| VSNS (20) | Ripple injection input | Accepts externally generated VRAMP signal (100–900 mV) to stabilize loop with low-ESR ceramic capacitors |
| COMP (21) | Error amplifier output | Connects external RCOMP/CCOMP network; sets loop crossover (typically 1/10 × fSW) and phase margin |
| VFB (22) | Feedback input | Monitors resistor divider from VOUT; compares to 0.8 V reference; enables precise output programming |
| AGND (23,28) | Analog ground reference | Separate from PGND; connects to VFB, COMP, SS, fSW, ILIMIT, MODE; must be shorted with wide trace |
| fSW (24) | Frequency setting | Resistor to AGND sets switching frequency (100 kHz–2 MHz); no VIN dependency when VIN = VCIN |
| ILIMIT (25) | Current limit programming | Resistor to AGND sets valley OCP threshold; 60 kΩ yields 10.4–15.6 A for SIC461ED-T1-GE3 |
| VDD (26) | Bias supply output | Internal LDO output (4.75–5.25 V); powers control circuitry; requires 1 μF AGND decoupling |
| MODE (27) | Operation mode select | Resistor to AGND selects forced CCM, power-save, or ultrasonic mode; supports dynamic reconfiguration |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | Optimized n-channel HS/LS MOSFETs deliver 10 A continuous current with <2 °C/W junction-to-case thermal resistance |
| Voltage-Mode COT Control | Combines fast transient response (via VSNS feed-forward) with PWM-like line/load regulation stability |
| Programmable Protection | OCP (via ILIMIT), OVP/UVP (via VFB monitoring), OTP (150 °C trip, 35 °C hysteresis), and SCP with auto-retry |
| Three-Mode Operation | Forced CCM, power-save (diode emulation + frequency foldback), and ultrasonic (>20 kHz min) selectable via MODE pin |
| Flexible Bias Architecture | VCIN accepts full 4.5–60 V range; VDRV can be externally supplied to eliminate LDO losses in high-efficiency designs |
Applications
| Industrial Computing Power Rail | Telecom Intermediate Bus Converter |
|---|---|
Use Scenario: Providing 12 V or 5 V intermediate bus for FPGA I/O banks and peripheral controllers in programmable logic systems. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated 10 A output with tight ripple (<20 mVpp) and fast load-step response (<5 μs). Use Value: Enables single-stage conversion from 48 V backplane, eliminating cascaded stages and improving system efficiency by up to 3.2 % versus discrete solutions. | Use Scenario: Converting 48 V telecom supply to 3.3 V for baseband processing units in 4G/5G radio units. IC Role / Device Role / Timing Role: High-density point-of-load regulator operating at 1.2 MHz to minimize EMI in RF-sensitive environments. Use Value: Achieves 96.5 % efficiency at 6 A load, reducing thermal footprint by 40 % compared to legacy 5 mm × 6 mm controllers. |
| Robotics Motor Drive Auxiliary Supply | Battery Management System Pre-Regulator |
Use Scenario: Generating 5 V bias for motor gate drivers and position sensors in collaborative robot joint modules. IC Role / Device Role / Timing Role: Input-capable buck converter accepting variable 12–36 V battery input while maintaining stable 5 V output during motor transients. Use Value: Ultrafast transient response (<10 μs recovery) prevents brownout during high-dV/dt motor commutation events. | Use Scenario: Stepping down 24–60 V battery pack voltage to 12 V for isolated ADC and protection IC bias in EV battery packs. IC Role / Device Role / Timing Role: Robust pre-regulator with OVP/UVP/OTP ensuring safe operation during cell imbalance or fault conditions. Use Value: Integrated protection eliminates need for external supervisor ICs, reducing BOM count by 3 components per channel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPM3695-10 from Monolithic Power Systems | 10 A rated, 4–16 V input, integrated inductor; lacks 60 V input capability and programmable OCP | Suitable for space-constrained consumer devices but not industrial 48 V systems | Select MPM3695-10 only when board area is primary constraint and input voltage remains ≤16 V |
| TPS54A20 from Texas Instruments | 10 A rated, 4–18 V input, external MOSFETs; requires more external components and lacks integrated power stage | Preferred for designs needing custom MOSFET selection or higher than 18 V input | Choose TPS54A20 when thermal management demands discrete FETs or input exceeds 18 V with external HV front-end |
Compared with MPM3695-10 and TPS54A20, the SIC461ED-T1-GE3 uniquely combines 60 V input tolerance, fully integrated 10 A power stage, and programmable protection in a 5 mm × 5 mm MLP package - making it optimal for industrial and telecom systems requiring wide-input, high-reliability DC/DC conversion without layout complexity.
Availability
SIC461ED-T1-GE3 is available at Aetrix Electronics and suitable for industrial computing power rails, telecom intermediate bus converters, robotics auxiliary supplies, and battery management system pre-regulators requiring stable component supply across extended temperature and voltage ranges.
Supply support for SIC461ED-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-reliability power management solutions for industrial, automotive, and computing markets.
The SiC46x product line was designed specifically for wide-input, high-current point-of-load regulation in space-constrained industrial and telecom infrastructure, emphasizing thermal performance, protection robustness, and ease of loop compensation.
FAQ
What is the maximum input voltage rating for the SIC461ED-T1-GE3?
The SIC461ED-T1-GE3 has an absolute maximum input voltage (VIN) rating of 66 V, with recommended operating range from 4.5 V to 60 V. This allows direct connection to 48 V telecom systems and industrial 24/36 V rails without external pre-regulation. Exceeding 60 V during normal operation risks violating recommended conditions, though the device withstands transient spikes up to 66 V per absolute maximum ratings.
How is the output current limit configured on the SIC461ED-T1-GE3?
The output current limit on the SIC461ED-T1-GE3 is set via an external resistor connected from the ILIMIT pin to AGND. For the SIC461 variant, a 60 kΩ resistor yields a valley current limit of 10.4–15.6 A across temperature. This resistor value is specified in the Electrical Specifications table and directly scales the internal OCP threshold - no calibration or trimming is required.
Does the SIC461ED-T1-GE3 support output voltage tracking and sequencing?
Yes, the SIC461ED-T1-GE3 supports output voltage tracking and sequencing with pre-bias start-up, as explicitly stated in the FEATURES section of the datasheet. This is implemented through the soft-start (SS) pin and feedback (VFB) architecture, allowing coordinated ramp-up of multiple rails in complex power systems without external supervisors.
What package type and thermal characteristics does the SIC461ED-T1-GE3 use?
The SIC461ED-T1-GE3 uses the PowerPAK® MLP55-27L package - a 5 mm × 5 mm, 27-pin lead-free QFN with exposed thermal pad. Its thermal resistance is 2 °C/W junction-to-case and 12 °C/W junction-to-ambient (with standard 2-layer board), enabling 10 A operation without forced air in most industrial layouts.
Can the SIC461ED-T1-GE3 operate with all-ceramic output capacitors?
Yes, the SIC461ED-T1-GE3 maintains loop stability with all-ceramic output capacitors due to its dual-loop architecture: the VFB pin handles DC regulation while the VSNS pin accepts externally injected ripple (VRAMP) to ensure sufficient AC loop gain. A minimum VRAMP amplitude of 100 mV is required; values up to 900 mV are supported to balance stability and transient performance.
SIC461ED-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):
- 60V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 55.2V
- Current - Output:
- 10A
- Frequency - Switching:
- 100kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerPAK® MLP55-27
SIC461ED-T1-GE3 FAQ
1.How can I place an order for SIC461ED-T1-GE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIC461ED-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 SIC461ED-T1-GE3 reliable?
The price and inventory of SIC461ED-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 SIC461ED-T1-GE3 is usually 5 days.
3.What payment methods are accepted for SIC461ED-T1-GE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIC461ED-T1-GE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIC461ED-T1-GE3?
SIC461ED-T1-GE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIC461ED-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 SIC461ED-T1-GE3?
For technical support, including SIC461ED-T1-GE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIC461ED-T1-GE3 requirements.
6.How does Aetrix verify that SIC461ED-T1-GE3 is sourced from the original manufacturer or authorized distributors?
All SIC461ED-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 SIC461ED-T1-GE3 meets industry standards.
7.What is the process for return or replacement of SIC461ED-T1-GE3?
All SIC461ED-T1-GE3 units undergo pre-shipment inspection (PSI). If there is an issue with SIC461ED-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 SIC461ED-T1-GE3 part is unused and in its original packaging.
Return procedure for SIC461ED-T1-GE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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