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Vishay Siliconix SIP12108ADMP-T1GE4
- Part No.:
- SIP12108ADMP-T1GE4
- Manufacturer:
- Vishay Siliconix
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
SIP12108ADMP-T1GE4.pdf
- Description:
- IC REG BUCK ADJ 5A 16MLP
- Quantity:
- Payment:
- Shipping:
Inventory:2,138
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Product details
Overview
SIP12108ADMP-T1GE4 from Vishay Siliconix is a monolithic synchronous buck regulator IC with integrated high-side and low-side MOSFETs, delivering 5 A continuous output current at up to 4 MHz switching frequency. It operates from a 2.8 V to 5.5 V input, regulates down to 0.6 V adjustable output voltage, and features ±1 % VOUT accuracy-designed for point-of-load regulation in FPGAs, DSPs, and network processors.
For engineers reviewing the SIP12108ADMP-T1GE4 datasheet, SIP12108ADMP-T1GE4 pinout, SIP12108ADMP-T1GE4 application, or SIP12108ADMP-T1GE4 equivalent, key selection considerations include its CM-COT control architecture for ultrafast transient response, UVP omission (vs. non-"A" variant), PGOOD open-drain monitoring, and QFN16 3 mm × 3 mm thermal-enhanced package.
Technical Context
The SIP12108ADMP-T1GE4 implements current-mode constant-on-time (CM-COT) control using internal valley-current sensing and a programmable RON-set on-time generator. Its error amplifier transconductance is 1 mS, and feedback reference is tightly regulated at 0.600 V (±0.009 V over –40 °C to +85 °C).
Unlike the base SiP12108, the "A" version disables output under-voltage protection (UVP) while retaining OVP, OTP, SCP, and PGOOD. It supports dual operating modes via the AUTO pin: forced continuous conduction mode (CCM) when tied to AVIN, or power-save mode (PSM) with diode emulation and frequency foldback when grounded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8 V to 5.5 V - supports direct connection to common system rails (3.3 V, 5 V) without pre-regulation. |
| Output Current | 5 A continuous - sufficient for mid-power FPGA I/O banks or ARM-based SoCs with dynamic load steps. |
| Switching Frequency | Up to 4 MHz - enables use of sub-1 μH inductors and compact ceramic output capacitors (e.g., 3 × 22 μF). |
| Feedback Reference | 0.600 V ±0.009 V - enables precise output setting (e.g., 1.2 V with 1% resistor divider) across full temperature range. |
| Efficiency | 95 % peak - achieved at 2 MHz with optimized internal MOSFET RDS(on) (HS: 35–51 mΩ, LS: 23–35 mΩ). |
| Protection Features | OVP, SCP, OTP, UVLO - no UVP (confirmed disabled per "A" variant spec); PGOOD open-drain output with 4 μs delay. |
| Soft-Start Time | 1.5 ms - ensures monotonic VOUT ramp with no overshoot during power-up sequencing. |
Pinout & Package
Package: QFN16-33G, 3 mm × 3 mm, exposed thermal pad (EP), RoHS-compliant, lead (Pb)-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 (VIN) | Power input for integrated MOSFETs | Connects directly to 2.8–5.5 V rail; must be decoupled near package with low-ESR capacitor. |
| 2 (AVIN) | Bias supply for control circuitry | Independent 2.8–5.5 V input; triggers UVLO at 2.55 V (typ.) with 300 mV hysteresis. |
| 3 (EN) | Enable control input | Active-high logic: ≥1.5 V enables, ≤0.4 V disables; must not be left floating. |
| 4 (RON) | On-time programming node | Resistor to GND sets minimum on-time and thus switching frequency (e.g., 105 kΩ ≈ 1 MHz). |
| 5 (AUTO) | Operating mode selector | Ground = PSM (light-load efficiency); connect to AVIN = forced CCM (fixed-frequency PWM). |
| 6 (PGOOD) | Open-drain power-good indicator | Asserted when VFB is within ±12.5 % / +21 % window of 0.6 V; requires external pull-up. |
| 7 (GMO) | Compensation and droop node | Connect RC network (type II) to AGND for loop stability; also enables current-sharing droop. |
| 8 (AGND) | Analog ground reference | Separate from PGND to minimize noise coupling into feedback and error amplifier. |
| 9 (VFB) | Feedback input | 0.6 V reference point; connects to resistor divider from VOUT to AGND for output voltage setting. |
| 10 (VOUT) | Output voltage sense | Direct connection to output rail for accurate remote sensing; improves load regulation. |
| 11–13 (LX) | Switch node | High-current path to external inductor; requires low-inductance layout and thermal relief to EP. |
| 14–15 (PGND) | Power ground return | Low-impedance return for MOSFET currents; must be tied to EP and separated from AGND at single point. |
| EP | Exposed thermal paddle | Internally connected to PGND; requires ≥4 thermal vias to inner/ground planes for RθJA = 36.3 °C/W. |
Key Features
| Feature | Design Value |
|---|---|
| CM-COT control architecture | Delivers <10 μs load-step response with minimal output capacitance; eliminates need for ESR-based compensation networks. |
| Selectable PSM/CCM operation | Enables >85 % efficiency at 10 mA load (PSM) while maintaining tight regulation and low ripple at full load (CCM). |
| Integrated MOSFET power stage | Eliminates external high-side/low-side drivers and gate resistors; reduces BOM count and layout complexity. |
| Full fault protection suite | OVP (21 % above nominal), SCP (7.5 A pulse-by-pulse), OTP (160 °C trip with 30 °C hysteresis), UVLO - ensures robust field operation. |
| PGOOD with precise thresholds | Monitors VFB with rising/falling thresholds (±12.5 % UV, +21 % OV) and 4 μs delay - supports reliable system power sequencing. |
Applications
| Point-of-Load for FPGA Core Rails | Industrial IoT Sensor Hub Power |
|---|---|
Use Scenario: Regulating 1.2 V core supply for Xilinx Artix-7 FPGA with dynamic current draw from 0.1 A to 5 A. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing tightly regulated, low-noise DC output with fast transient recovery. Use Value: CM-COT architecture achieves <50 mV undershoot on 0→5 A step without increasing output capacitance beyond 3×22 μF MLCC. | Use Scenario: Powering ARM Cortex-M7 MCU, RS-485 transceiver, and analog sensor front-end from a 3.3 V industrial bus. IC Role / Device Role / Timing Role: Compact, thermally efficient DC-DC converter enabling high-density PCB layout in sealed enclosures. Use Value: QFN16 3×3 mm package with exposed paddle sustains 5 A continuous output at +85 °C ambient with standard 2-layer board cooling. |
| Optical Network Line Card Bias | Automated Test Equipment (ATE) Auxiliary Rail |
Use Scenario: Generating stable 2.5 V bias for SFP+ transceivers in telecom line cards with strict ripple limits (<10 mVpp). IC Role / Device Role / Timing Role: High-frequency (≥2 MHz) buck regulator minimizing magnetic component size while meeting EMI Class B limits. Use Value: 4 MHz max switching frequency allows use of 0.47 μH shielded inductor, reducing board area by 40 % vs. 500 kHz alternatives. | Use Scenario: Providing clean 1.8 V supply to high-speed ADC/DAC signal chains in benchtop ATE systems. IC Role / Device Role / Timing Role: Low-noise, precision-regulated power source with PGOOD signaling for system-level health monitoring. Use Value: ±1 % VOUT accuracy and 0.6 V reference tolerance ensure <±18 mV absolute output deviation across temperature and line. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SiP12108DMP-T1GE4 | Includes output under-voltage protection (UVP); otherwise identical pinout, package, and electrical specs. | Required where latch-off on output collapse is mandatory (e.g., safety-critical subsystems). | Select SiP12108DMP-T1GE4 only if UVP is explicitly needed; SIP12108ADMP-T1GE4 offers same efficiency and transient performance without UVP overhead. |
| TPS54560QDGQRQ1 | Adjustable frequency (100 kHz–2.5 MHz), higher VIN (max 60 V), external MOSFETs; larger SOIC-10 package. | Used in wide-input industrial or automotive applications where input exceeds 5.5 V or thermal constraints allow larger footprint. | Choose TPS54560QDGQRQ1 only for >5.5 V input or extended temp (–40 °C to +125 °C); SIP12108ADMP-T1GE4 is superior for space-constrained 3.3/5 V PoL. |
Compared with SiP12108DMP-T1GE4, SIP12108ADMP-T1GE4 trades UVP for marginally lower quiescent current and simplified fault-handling logic; compared with TPS54560QDGQRQ1, it delivers 3× higher power density and 2× faster transient response but lacks wide-VIN capability.
Availability
SIP12108ADMP-T1GE4 is available at Aetrix Electronics and suitable for FPGA power delivery, industrial sensor hubs, optical line card biasing, and automated test equipment auxiliary rails requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SIP12108ADMP-T1GE4 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 designs and manufactures high-performance power semiconductors and integrated solutions, with expertise in MOSFETs, power ICs, and SiP technology since 1962.
The SiP12108 product line delivers monolithic, high-frequency synchronous buck regulators targeting space-constrained point-of-load applications in computing, networking, and industrial electronics-emphasizing integration, thermal efficiency, and transient performance.
FAQ
Does SIP12108ADMP-T1GE4 include output under-voltage protection (UVP)?
No, SIP12108ADMP-T1GE4 does not include output under-voltage protection. The "A" suffix explicitly denotes UVP disablement per Vishay's ordering information and functional description. UVP is present only in the non-"A" variant (e.g., SiP12108DMP-T1GE4). SIP12108ADMP-T1GE4 retains OVP, OTP, SCP, and UVLO.
What is the maximum supported switching frequency for SIP12108ADMP-T1GE4?
The maximum guaranteed switching frequency for SIP12108ADMP-T1GE4 is 4 MHz, set by the RON resistor value and internal constant K (10.45 × 10−12). At 4 MHz, the device maintains stable regulation and 95 % peak efficiency with appropriate layout and component selection. SIP12108ADMP-T1GE4's CM-COT architecture inherently adapts frequency with load and line conditions.
How is the output voltage programmed on SIP12108ADMP-T1GE4?
The output voltage of SIP12108ADMP-T1GE4 is programmed using an external resistor divider connected between VOUT and AGND, with the midpoint feeding the VFB pin. Since the internal reference is 0.600 V, VOUT = 0.6 V × (1 + R1/R2). For example, a 1.2 V output requires R1/R2 = 1.0; SIP12108ADMP-T1GE4's ±1 % reference accuracy ensures resulting VOUT tolerance remains within specification.
Can SIP12108ADMP-T1GE4 operate with ceramic output capacitors only?
Yes, SIP12108ADMP-T1GE4 is fully stable with ceramic output capacitors alone-no ESR network or bulk electrolytic capacitor is required. Its CM-COT control architecture and internal current-sense loop eliminate dependency on capacitor ESR for stability. Typical designs use 3×22 μF X5R/X7R MLCCs, achieving <10 mVpp ripple at full load and ultrafast transient response.
What thermal design guidance applies to SIP12108ADMP-T1GE4?
SIP12108ADMP-T1GE4 requires connection of its exposed thermal pad (EP) to a solid PCB ground plane via ≥4 thermal vias (0.3 mm diameter, spaced evenly). This achieves the specified RθJA of 36.3 °C/W. Without proper thermal relief, junction temperature may exceed 150 °C at 5 A continuous load in still air. Layout guidelines are provided in Vishay document S20-0484-Rev. C.
SIP12108ADMP-T1GE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay Siliconix
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- 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):
- 2.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 4.68V
- Current - Output:
- 5A
- Frequency - Switching:
- 200kHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MLP (3x3)
SIP12108ADMP-T1GE4 FAQ
1.How can I place an order for SIP12108ADMP-T1GE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SIP12108ADMP-T1GE4 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 SIP12108ADMP-T1GE4 reliable?
The price and inventory of SIP12108ADMP-T1GE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SIP12108ADMP-T1GE4 is usually 5 days.
3.What payment methods are accepted for SIP12108ADMP-T1GE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SIP12108ADMP-T1GE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SIP12108ADMP-T1GE4?
SIP12108ADMP-T1GE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SIP12108ADMP-T1GE4 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 SIP12108ADMP-T1GE4?
For technical support, including SIP12108ADMP-T1GE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SIP12108ADMP-T1GE4 requirements.
6.How does Aetrix verify that SIP12108ADMP-T1GE4 is sourced from the original manufacturer or authorized distributors?
All SIP12108ADMP-T1GE4 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 SIP12108ADMP-T1GE4 meets industry standards.
7.What is the process for return or replacement of SIP12108ADMP-T1GE4?
All SIP12108ADMP-T1GE4 units undergo pre-shipment inspection (PSI). If there is an issue with SIP12108ADMP-T1GE4, 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 SIP12108ADMP-T1GE4 part is unused and in its original packaging.
Return procedure for SIP12108ADMP-T1GE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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