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Vishay Siliconix SIC437BED-T1-GE3
- Part No.:
- SIC437BED-T1-GE3
- Manufacturer:
- Vishay Siliconix
- Package:
- 24-PowerWFQFN
- Datasheet:
-
SIC437BED-T1-GE3.pdf
- Description:
- IC REG BCK ADJ POWERPAK MLP44-24
- Quantity:
- Payment:
- Shipping:
Inventory:15,045
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Product details
Overview
SIC437BED-T1-GE3 from Vishay Siliconix is a 12 A synchronous buck DC/DC converter with integrated high-side and low-side MOSFETs, operating from 3 V to 28 V input and delivering adjustable output down to 0.6 V. It features power-saving mode, ±1 % output voltage accuracy over –40 °C to +125 °C, and supports 300 kHz–1 MHz programmable switching frequency. Used in point-of-load (POL) regulation for industrial computing and telecom infrastructure.
For engineers reviewing the SIC437BED-T1-GE3 datasheet, SIC437BED-T1-GE3 pinout, SIC437BED-T1-GE3 application, or SIC437BED-T1-GE3 equivalent, this page delivers verified technical context, validated pin functions, confirmed light-load efficiency behavior, and real-world alternative selection guidance for POL designs requiring stable 12 A output with minimal external components.
Technical Context
The SIC437BED-T1-GE3 implements voltage-mode constant-on-time (VM-COT) control with internal ramp generation and error amplifier compensation - eliminating need for external ESR networks or loop compensation components. Its architecture enables ultrafast transient response and stable operation with any output capacitor type.
This variant uses power-saving (diode-emulation + frequency foldback) light-load mode, supports pre-bias startup, and integrates full protection including cycle-by-cycle OCP, OVP/UVP, OTP with 25 °C hysteresis, and open-drain PGOOD. Input voltage range is 3 V–28 V; VDD/VDRV are internally generated above 4.5 V VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 12 A continuous - supports high-density POL rails without external MOSFETs or driver ICs. |
| Input voltage range | 3 V to 28 V - accommodates 5 V, 12 V, and 24 V input rails in industrial and telecom systems. |
| Output voltage range | Adjustable down to 0.6 V - enables core voltage regulation for modern processors and FPGAs. |
| Feedback accuracy | ±1 % from –40 °C to +125 °C - ensures tight regulation across full industrial temperature range. |
| Switching frequency | Programmable: 300 / 500 / 750 / 1000 kHz - allows optimization of size vs. efficiency vs. EMI. |
| Light-load mode | Power-save (SiC437B) - disables LS recirculation and folds back frequency to maximize efficiency below ~1 A. |
| Peak efficiency | 97 % at 12 VIN/1.2 VOUT - reduces thermal load and improves system-level power density. |
Pinout & Package
Package: PowerPAK® MLP44-24L (4 mm × 4 mm, 0.5 mm pitch, exposed thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (pins 1,2,22,26) | Input power supply | Accepts 3–28 V rail; multiple pins reduce IR drop and improve thermal path. |
| PGND (pins 3,4,13,27) | Power ground return | Low-inductance return path for high di/dt switching currents; separate from AGND. |
| SW (pins 5–9) | Switching node | Connection point for external inductor; high dv/dt node requiring careful layout. |
| GL (pins 10,11,28) | Low-side gate driver output | Drives LS MOSFET gate; tied internally to power stage - not user-accessible. |
| VDRV (pin 12) | Gate driver supply | Internal 5 V supply for HS/LS drivers; requires 2.2 μF decoupling to PGND. |
| PGOOD (pin 14) | Power-good flag | Open-drain output asserting when VOUT is within ±4 % of target; 25 μs blanking prevents false triggers. |
| VDD (pin 15) | Logic supply | Internal 5 V regulator output; powers control logic; requires 1 μF decoupling to AGND. |
| AGND (pins 16,25) | Analog ground reference | Reference for FB, MODE, EN; must be connected to clean ground plane, isolated from PGND near IC. |
| FB (pin 17) | Feedback input | Monitors output via resistor divider; 0.6 V internal reference enables precise VOUT setting. |
| VOUT (pin 18) | Output voltage sense | Direct connection to output rail for accurate remote sensing; improves load regulation. |
| EN (pin 19) | Enable control | Active-high logic input; internal 5 MΩ pull-down prevents floating-disable; TTL/CMOS compatible. |
| MODE2 (pin 20) | Soft-start & current limit | Resistor-to-VDD/AGND sets soft-start time (3/6 ms) and OCP threshold (5.4–18 A for SiC437). |
| MODE1 (pin 21) | Frequency & mode select | Resistor-to-VDD/AGND selects switching frequency (300–1000 kHz) and forces CCM or skip mode. |
| BOOT (pin 23) | Bootstrap supply | Connects to PHASE via 0.1 μF ceramic capacitor; supplies gate drive voltage for HS MOSFET. |
| PHASE (pin 24) | Bootstrap return path | Switching node for bootstrap capacitor return; must be routed with low inductance to SW. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated VM-COT control | Eliminates need for external RC compensation network - reduces BOM count and layout sensitivity. |
| Pre-bias start-up support | Prevents negative current surge and output voltage collapse when powering into pre-charged loads. |
| Output voltage tracking & sequencing | Enables coordinated power-up/down of multiple rails using external resistive networks on FB/VOUT pins. |
| Ultralow shutdown current | 0.5–3 μA - preserves battery life in always-on systems and enables fast wake-up from deep sleep. |
| Robust fault protection suite | Includes OCP (valley-current sensing), OVP/UVP (FB-based), OTP (150 °C trip), and auto-retry latch-off. |
Applications
| Industrial Computing Power Rails | Telecom Point-of-Load Regulation |
|---|---|
Use Scenario: Providing 1.2 V @ 12 A to FPGA or ASIC core in programmable logic controllers and edge servers. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with integrated power stage and VM-COT control loop. Use Value: Delivers 97 % peak efficiency and ultrafast transient response to handle dynamic core current demands without bulk capacitance overhead. |
Use Scenario: Generating 3.3 V @ 8–12 A for baseband processing units in 5G small cell radios. IC Role / Device Role / Timing Role: High-density POL converter supporting 24 V input and strict ripple requirements (< 20 mVpp). Use Value: Programmable 500 kHz/750 kHz switching enables EMI filtering compliance while maintaining >95 % efficiency at full load. |
| Desktop/Notebook CPU Core Supply | Factory Automation I/O Module Power |
Use Scenario: Delivering tightly regulated 0.85–1.1 V to mobile CPUs in embedded thin clients and digital signage controllers. IC Role / Device Role / Timing Role: Adjustable-output buck regulator with ±1 % accuracy and pre-bias start-up capability. Use Value: Maintains regulation during hot-plug events and supports dynamic voltage scaling (DVS) via feedback resistor programming. |
Use Scenario: Powering isolated sensor interfaces and microcontroller subsystems in PLC backplanes with 12 V or 24 V bus inputs. IC Role / Device Role / Timing Role: Robust, thermally efficient POL regulator with integrated OVP/UVP/OTP and PGOOD monitoring. Use Value: Enables reliable operation in harsh environments (-40 °C to +105 °C ambient) with no derating up to 12 A. |
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 | 8 A rated, 2–24 V input, fixed 500 kHz fSW, no VOUT sense pin, lower integration (external MOSFETs required) | Limited to ≤8 A loads; lacks VOUT pin for remote sensing and pre-bias start-up support | Select when cost-sensitive, lower-current (<8 A), and board space permits discrete power stage. |
| TPS54560QDGQRQ1 | 6 A rated, 3.5–60 V input, adjustable frequency (100–2500 kHz), external compensation, no integrated LS MOSFET | Wider input range but lower current; requires external gate drivers and compensation network | Choose for high-input-voltage (>28 V) automotive or industrial applications where 12 A is not required. |
Compared with MP2451DT-LF-Z and TPS54560QDGQRQ1, the SIC437BED-T1-GE3 provides higher current density (12 A), integrated dual MOSFETs, VOUT sensing, and superior light-load efficiency via power-save mode - making it optimal for space-constrained, high-performance POL designs demanding ≥10 A output.
Availability
SIC437BED-T1-GE3 is available at Aetrix Electronics and suitable for industrial computing, telecom infrastructure, and embedded controller applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature and load.
Supply support for SIC437BED-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 solutions for industrial, computing, and telecom markets.
The SiC43x family was designed to deliver high-current, low-footprint synchronous buck regulation with minimal external components - targeting next-generation POL applications where thermal performance, transient response, and design simplicity are critical.
FAQ
What is the maximum continuous output current supported by the SIC437BED-T1-GE3?
The SIC437BED-T1-GE3 supports 12 A continuous output current at ambient temperatures up to +105 °C with appropriate PCB copper area and airflow. This rating is validated per Vishay's thermal characterization in the S20-0679-Rev. D datasheet under standard JEDEC 2-layer board conditions. Derating applies above 105 °C ambient or with reduced thermal mass.
Does the SIC437BED-T1-GE3 require external compensation components?
No, the SIC437BED-T1-GE3 does not require external compensation components. Its voltage-mode constant-on-time (VM-COT) architecture integrates all necessary ramp generation and error amplifier compensation circuitry internally. Stability is guaranteed with any output capacitor type - including low-ESR ceramics - eliminating the need for external RC networks or ESR-dependent bulk capacitors.
How is light-load efficiency achieved in the SIC437BED-T1-GE3?
The SIC437BED-T1-GE3 achieves high light-load efficiency through its power-save mode (SiC437B variant), which combines diode emulation (turning off the low-side MOSFET at zero inductor current) and frequency foldback (reducing switching frequency proportionally to load). This eliminates recirculating current losses and minimizes switching losses while maintaining output regulation and ripple within specification.
Can the SIC437BED-T1-GE3 operate with a 3.3 V input supply?
Yes, the SIC437BED-T1-GE3 supports 3 V minimum input voltage, but only in SiC437C/SiC437D variants with external VDD/VDRV supplies. The SIC437BED-T1-GE3 (SiC437B) requires VIN ≥ 4.5 V to self-generate VDD and VDRV. For 3.3 V input applications, use SIC437CED-T1-GE3 or SIC437DED-T1-GE3 with externally supplied 5 V to VDD and VDRV pins.
What protection features are integrated into the SIC437BED-T1-GE3?
The SIC437BED-T1-GE3 integrates cycle-by-cycle overcurrent protection (OCP), output overvoltage protection (OVP), output undervoltage/short-circuit protection (UVP) with auto-retry, overtemperature protection (OTP) with 25 °C hysteresis, input UVLO, and a dedicated open-drain PGOOD output. All protections are fully autonomous and require no external components to activate.
SIC437BED-T1-GE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Package/Case:
- 24-PowerWFQFN
- 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):
- 3V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 20V
- Current - Output:
- 12A
- Frequency - Switching:
- 300kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerPAK® MLP44-24
SIC437BED-T1-GE3 FAQ
1.How can I place an order for SIC437BED-T1-GE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIC437BED-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 SIC437BED-T1-GE3 reliable?
The price and inventory of SIC437BED-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 SIC437BED-T1-GE3 is usually 5 days.
3.What payment methods are accepted for SIC437BED-T1-GE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIC437BED-T1-GE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIC437BED-T1-GE3?
SIC437BED-T1-GE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIC437BED-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 SIC437BED-T1-GE3?
For technical support, including SIC437BED-T1-GE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIC437BED-T1-GE3 requirements.
6.How does Aetrix verify that SIC437BED-T1-GE3 is sourced from the original manufacturer or authorized distributors?
All SIC437BED-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 SIC437BED-T1-GE3 meets industry standards.
7.What is the process for return or replacement of SIC437BED-T1-GE3?
All SIC437BED-T1-GE3 units undergo pre-shipment inspection (PSI). If there is an issue with SIC437BED-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 SIC437BED-T1-GE3 part is unused and in its original packaging.
Return procedure for SIC437BED-T1-GE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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