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Vishay Siliconix SIC468ED-T1-GE3
- Part No.:
- SIC468ED-T1-GE3
- Manufacturer:
- Vishay Siliconix
- Package:
- PowerPAK® MLP55-27
- Datasheet:
-
SIC468ED-T1-GE3.pdf
- Description:
- IC REG BCK ADJ POWERPAK MLP55-27
- Quantity:
- Payment:
- Shipping:
Inventory:5,925
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Product details
Overview
SIC468ED-T1-GE3 from Vishay Siliconix is a 4 A synchronous buck DC/DC converter with integrated high-side and low-side MOSFETs, operating from 4.5 V to 60 V input and delivering adjustable output down to 0.8 V. It features voltage-mode constant-on-time (COT) control, 2 MHz max switching frequency, ±1 % output voltage accuracy over –40 °C to +125 °C, and full protection including OCP, OVP, UVP, SCP, and OTP - deployed in industrial power supplies and robotics.
For engineers reviewing the SIC468ED-T1-GE3 datasheet, SIC468ED-T1-GE3 pinout, SIC468ED-T1-GE3 application, or SIC468ED-T1-GE3 equivalent, key selection considerations include its 4 A current rating (scalable within SiC46x family), programmable soft start via external capacitor, selectable current limit (3 settings), mode-configurable power-save operation, and compatibility with all-ceramic output capacitors without ESR network requirements.
Technical Context
The SIC468ED-T1-GE3 implements voltage-mode constant-on-time (COT) control with adaptive zero-current detection for DCM operation, enabling ultrafast transient response and stable regulation with minimal output capacitance. Its internal ramp generator and error amplifier eliminate need for external compensation components.
It integrates dual N-channel MOSFETs optimized for up to 98 % peak efficiency, supports pre-bias startup and output voltage tracking/sequencing, and uses an internal 5 μA soft-start current source tied to the SS pin - with valley current sensing for cycle-by-cycle OCP and open-drain PGOOD with 25 μs blanking time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4 A continuous - matches SiC468 variant's rated current capability per datasheet Table on page 5 |
| Input Voltage Range | 4.5 V to 60 V - enables direct use with 12 V, 24 V, 48 V industrial rails and wide-range adapters |
| Output Voltage Accuracy | ±1 % at –40 °C to +125 °C - ensures tight regulation across full operating temperature range |
| Switching Frequency | 100 kHz to 2 MHz - set externally via resistor on fSW pin; supports high-density layout and noise-sensitive applications |
| Feedback Reference | 0.800 V ±0.008 V - precise internal reference enables accurate output setting with standard resistor dividers |
| Valley Current Limit | 3 A / 4.2 A / 6 A - selectable via ILIMIT pin tied to AGND / floating / VDD per datasheet Table on page 5 |
| Efficiency | Up to 98 % peak - achieved by integrated low-RDS(on) MOSFETs and optimized gate drive architecture |
| Soft Start | Capacitor-programmable - internal 5 μA current source charges external SS capacitor for controlled ramp-up |
Pinout & Package
Package: PowerPAK® MLP55-27L - 5 mm × 5 mm, 27-pin lead (Pb)-free power-enhanced QFN with exposed thermal pad (PGND-connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCIN | Internal regulator supply input | Bias source for VDD and VDRV; connect to VIN via RC filter or separate ≥5 V rail to reduce LDO losses |
| 2 PGOOD | Open-drain power-good indicator | Asserts high-impedance when VFB is within ±10 % of target; requires external pull-up to ≤5 V |
| 3 EN | Enable control | High-voltage compatible (up to 60 V); internal weak pull-down prevents floating-induced turn-on |
| 4 BOOT | High-side gate driver bootstrap | Connect series R-C from BOOT to PHASE; ≥4.7 Ω recommended for SIC468ED-T1-GE3 |
| 5,6 PHASE | High-side MOSFET source / switch node return | Low-inductance path for high di/dt return current; must be routed with short, wide copper |
| 7–8,29 VIN | Main power stage input | Drain of high-side MOSFET; decouple to PGND with low-ESR capacitors near pads |
| 9–11,17,30 PGND | Power ground | High-current return path for MOSFETs and input/output capacitors; thermally connected to exposed pad |
| 12–14 SW | Switch node | Connection point between high- and low-side MOSFETs; critical for EMI and layout integrity |
| 15 GL | Low-side gate driver output | Direct drive signal to low-side MOSFET gate; not user-accessible in normal operation |
| 16 VDRV | Gate driver supply output | LDO output for gate drive; 4.7 μF decoupling required; can be bypassed with external 5 V supply in Mode 3/4 |
| 19 SS | Soft-start timing | Internal 5 μA current source charges external capacitor; sets output voltage ramp rate |
| 20 VOUT | Output voltage sense point | Internal connection for ripple injection network; tie directly to output capacitor positive terminal |
| 22 VFB | Feedback input | Compares against 0.8 V reference; connect external resistor divider from VOUT to AGND |
| 23,28 AGND | Analog ground | Reference for feedback, soft-start, and mode circuits; short pins 23 & 28 with wide trace under IC |
| 24 fSW | Frequency setting | Resistor-to-AGND sets switching frequency from 100 kHz to 2 MHz per fSW = 1.9×10⁻¹⁰ × VOUT / RfSW |
| 25 ILIMIT | Current limit select | Tie to AGND (50 %), float (75 %), or VDD (100 %) to set valley OCP threshold per datasheet Table on page 5 |
| 26 VDD | Bias supply output | Internal LDO output (5 V typ.); 1 μF decoupling required; UVLO threshold 4.0 V rising with 150 mV hysteresis |
| 27 MODE | Operating mode select | Resistor-to-AGND selects power-save enable/disable and internal VDRV regulator state (Modes 1–4) |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated COT control | Eliminates need for external compensation network; stable with any capacitor type including all-ceramic |
| Programmable light-load efficiency | Diode emulation + frequency foldback in power-save mode reduces switching and conduction losses below ~20 % load |
| Configurable protection thresholds | OCP, OVP (120 %), UVP (20 %), OTP (150 °C trip, 35 °C hysteresis) - all active post-soft-start except OVP |
| Pre-bias startup support | Prevents negative output spikes and excessive LS FET sinking when VOUT is pre-charged above target |
| Output voltage tracking & sequencing | Enables coordinated power-up/down with other rails using external circuitry tied to VFB and SS pins |
| VIN-compatible enable logic | EN pin tolerates up to 60 V - allows direct interface with higher-voltage system controls without level-shifting |
Applications
| Industrial Motor Drives | Telecom Base Station Power |
|---|---|
Use Scenario: Local 5 V or 12 V bias rail generation for gate drivers, sensors, and FPGA I/O banks in servo drives and PLC modules. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated 4 A output from 24 V or 48 V backplane. Use Value: High efficiency (>95 % at 2 A) minimizes thermal stress in enclosed enclosures; 2 MHz operation enables compact magnetics and reduced EMI filtering. | Use Scenario: Point-of-load conversion for RF power amplifiers and digital baseband processors requiring tight ripple and fast transient response. IC Role / Device Role / Timing Role: Secondary buck stage converting 48 V intermediate bus to 3.3 V or 5 V with ±1 % accuracy and <25 μs PGOOD assertion delay. Use Value: Ultrafast transient response with minimal output capacitance meets stringent telecom ripple specs (≤20 mVpp); PGOOD enables safe processor reset sequencing. |
| Robotics Actuator Control | Industrial IoT Edge Node |
Use Scenario: Powering motor H-bridge drivers and IMU subsystems in collaborative robots where board space and thermal management are constrained. IC Role / Device Role / Timing Role: Compact 4 A buck converter supplying 5 V to microcontroller and sensor clusters from 24 V battery input. Use Value: MLP55-27L package delivers high power density; programmable soft start prevents inrush into large local capacitors during wake-from-sleep cycles. | Use Scenario: Power management for battery-backed wireless sensor nodes with intermittent high-current LTE/Matter radio bursts. IC Role / Device Role / Timing Role: Main system regulator providing 3.3 V at up to 4 A peak during transmission, with deep power-save mode during sleep. Use Value: 4 μA shutdown current extends battery life; valley OCP with auto-retry handles momentary antenna load mismatches without system reset. |
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, 0.6 A output, fixed 2 MHz frequency, no integrated power MOSFETs - requires external high/low-side switches | Lower current, lower integration; suited for sub-1 A auxiliary rails only | Select only if input <36 V and output ≤0.6 A; requires additional MOSFETs, gate drivers, and compensation design |
| TPS54332DR | 28 V max input, 3 A output, external MOSFETs, adjustable frequency 100 kHz–2.5 MHz, no valley OCP or pre-bias startup | Limited input range and current; lacks robust fault recovery and sequencing features | Choose only for cost-sensitive 3 A designs with <28 V input and no requirement for hiccup-mode UVP or pre-bias operation |
Compared with MP2451DT-LF-Z and TPS54332DR, the SIC468ED-T1-GE3 provides higher integration (dual MOSFETs), wider input (60 V), higher current (4 A), and advanced protections (valley OCP, pre-bias startup, PGOOD timing), making it suitable for demanding industrial and telecom applications where reliability and layout simplicity are critical.
Availability
SIC468ED-T1-GE3 is available at Aetrix Electronics and suitable for industrial motor drives, telecom base station power, robotics actuator control, and industrial IoT edge node applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for SIC468ED-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 with emphasis on ruggedness, precision, and thermal performance.
The SiC46x product line was designed specifically for high-density, wide-input industrial and telecom DC/DC conversion - integrating power MOSFETs, protection, and configuration flexibility into a single MLP55-27L package to reduce solution size and improve reliability.
FAQ
What is the maximum input voltage rating for the SIC468ED-T1-GE3?
The SIC468ED-T1-GE3 has an absolute maximum input voltage (VIN) rating of 66 V, with recommended operating range from 4.5 V to 60 V. Exceeding 60 V may trigger overvoltage protection or degrade long-term reliability. The device's internal high-side MOSFET and gate driver are characterized for stable operation up to 60 V, and the VCIN pin also supports up to 66 V absolute maximum per datasheet Section 3.
How does the SIC468ED-T1-GE3 achieve stability with all-ceramic output capacitors?
The SIC468ED-T1-GE3 achieves stability with all-ceramic output capacitors through its internally compensated voltage-mode constant-on-time (COT) architecture and adaptive zero-current detection. Unlike traditional voltage-mode controllers, it does not require external ESR for loop stability - instead, internal ramp generation and valley current sensing provide inherent phase margin. This eliminates the need for bulk electrolytic or polymer capacitors with intentional ESR.
Can the SIC468ED-T1-GE3 support pre-bias startup, and how is it implemented?
Yes, the SIC468ED-T1-GE3 supports pre-bias startup. When the FB pin senses voltage above the internal soft-start ramp value at power-on, the control logic disables both high-side and low-side MOSFET switching to prevent reverse current flow and negative output voltage spikes. This behavior is automatic and requires no external circuitry - it protects downstream loads and avoids excessive current sinking through the low-side FET during hot-plug or backup-supply scenarios.
What are the three valley current limit options for the SIC468ED-T1-GE3, and how are they selected?
The SIC468ED-T1-GE3 offers three valley current limit thresholds: 3 A (ILIMIT tied to AGND), 4.2 A (ILIMIT floating), and 6 A (ILIMIT tied to VDD). These correspond to 50 %, 75 %, and 100 % of the device's nominal 6 A valley OCP threshold, as specified in the Electrical Specifications table on page 5 of the datasheet. Selection is made solely by the DC state of the ILIMIT pin - no timing or configuration register is involved.
Does the SIC468ED-T1-GE3 include overtemperature protection, and what is its trip point?
Yes, the SIC468ED-T1-GE3 includes overtemperature protection (OTP) with a typical trip point of 150 °C junction temperature and 35 °C hysteresis (restarting at ~115 °C). OTP disables both high-side and low-side MOSFETs immediately upon exceeding the threshold. Notably, OTP is automatically disabled during discontinuous conduction mode (DCM) to avoid false trips at light loads - re-enabling only when inductor current becomes continuous.
SIC468ED-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):
- 15V
- Current - Output:
- 4A
- 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
SIC468ED-T1-GE3 FAQ
1.How can I place an order for SIC468ED-T1-GE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIC468ED-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 SIC468ED-T1-GE3 reliable?
The price and inventory of SIC468ED-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 SIC468ED-T1-GE3 is usually 5 days.
3.What payment methods are accepted for SIC468ED-T1-GE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIC468ED-T1-GE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIC468ED-T1-GE3?
SIC468ED-T1-GE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIC468ED-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 SIC468ED-T1-GE3?
For technical support, including SIC468ED-T1-GE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIC468ED-T1-GE3 requirements.
6.How does Aetrix verify that SIC468ED-T1-GE3 is sourced from the original manufacturer or authorized distributors?
All SIC468ED-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 SIC468ED-T1-GE3 meets industry standards.
7.What is the process for return or replacement of SIC468ED-T1-GE3?
All SIC468ED-T1-GE3 units undergo pre-shipment inspection (PSI). If there is an issue with SIC468ED-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 SIC468ED-T1-GE3 part is unused and in its original packaging.
Return procedure for SIC468ED-T1-GE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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