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Microchip Technology MCP16311T-E/MSVAO
- Part No.:
- MCP16311T-E/MSVAO
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP16311T-E/MSVAO.pdf
- Description:
- IC REG BUCK ADJ 1A 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,113
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Product details
Overview
MCP16311T-E/MSVAO from Microchip Technology is a synchronous step-down DC-DC converter IC with integrated high-side (300 mΩ) and low-side (170 mΩ) N-channel MOSFETs, 500 kHz fixed-frequency peak current mode control, 0.8 V reference voltage, and AEC-Q100 Grade 1 qualification for automotive use. It delivers up to 1 A continuous output current across 2.0–12 V output range from 4.4–30 V input, supporting local point-of-load regulation in harsh environments.
For engineers reviewing the MCP16311T-E/MSVAO datasheet, MCP16311T-E/MSVAO pinout, MCP16311T-E/MSVAO application, or MCP16311T-E/MSVAO equivalent, key selection considerations include its PWM/PFM auto-mode operation, thermal shutdown at +150°C with 25°C hysteresis, UVLO thresholds (4.1 V start / 3.6 V stop), internal soft-start (300 µs), and MSOP-8 package with exposed thermal pad (EP).
Technical Context
The MCP16311T-E/MSVAO implements fixed-frequency (425–575 kHz) peak current mode control with internal slope compensation and cycle-by-cycle current limiting. Its architecture integrates a 5.0 V internal LDO (VCC) for gate drive, dual N-MOSFET power switches, and an analog feedback loop referenced to a trimmed 0.800 V (±1.6%) bandgap.
It operates in automatic PFM/PWM mode: PFM enables ultra-low quiescent current (44 µA non-switching, 85 µA in PFM) at light loads, while PWM maintains fixed 500 kHz switching under heavier loads. The EN pin provides logic-level on/off control with 1.85 V VIH and 0.4 V VIL thresholds, and the device includes undervoltage lockout, overtemperature protection, and internal soft-start.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.4 V to 30 V - supports wide industrial and automotive battery inputs without external pre-regulation |
| Output Current | 1 A continuous - sufficient for microcontroller bias, local PoL, and peripheral rails in embedded systems |
| Feedback Reference | 0.800 V ±1.6% - enables precise output setting via external resistor divider; stable over -40°C to +125°C |
| Switching Frequency | 500 kHz typical (425–575 kHz) - balances EMI, inductor size, and efficiency for compact designs |
| High-Side RDS(on) | 300 mΩ - minimizes conduction loss during high-duty-cycle operation (e.g., 5 V out from 12 V in) |
| Low-Side RDS(on) | 170 mΩ - reduces freewheeling loss and improves light-load efficiency in synchronous buck topology |
| Quiescent Current | 44 µA (non-switching), 85 µA (PFM mode) - extends battery life in always-on automotive or IoT nodes |
| Thermal Shutdown | +150°C with +25°C hysteresis - protects silicon under sustained overload or poor PCB thermal design |
Pinout & Package
Package: 8-pin MSOP with exposed thermal pad (EP); EP internally connected to PGND and AGND for enhanced thermal dissipation and noise isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB | Feedback input | Connects to resistor divider to set output voltage; senses 0.8 V reference for regulation |
| VCC | Internal bias regulator output | Provides 5.0 V for gate drivers; requires 1 µF X7R ceramic bypass capacitor near pin |
| EN | Enable control input | Logic-high (>1.85 V) enables converter; logic-low (<0.4 V) disables with 3 µA shutdown current |
| VIN | Main power input | Accepts 4.4–30 V; decoupled with 4.7–20 µF ceramic capacitor to suppress switching noise |
| PGND | Power ground return | Return path for low-side switch and inductor; must be short-traced to minimize EMI and ground bounce |
| SW | Switch node | Connects to inductor and boost capacitor; carries high dv/dt; critical for layout and snubber design |
| BOOST | Floating high-side gate supply | Connected to SW via 100 nF bootstrap capacitor; enables high-side N-MOSFET drive |
| AGND | Analog ground reference | Reference for error amplifier, VFB, and internal circuits; single-point tie to PGND required |
| EP | Exposed thermal pad | Internally tied to PGND/AGND; soldered to PCB copper pour for thermal management and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous switches | Eliminates need for external MOSFETs and driver ICs; reduces BOM count and layout complexity |
| Auto PFM/PWM mode selection | Optimizes efficiency across full load range: PFM for <100 mA, PWM for >150 mA (VIN-dependent threshold) |
| Internal compensation | Removes requirement for external compensation network; simplifies design and improves stability margin |
| 0.8 V precision reference | Enables accurate output voltage setting down to 2.0 V with minimal resistor tolerance impact |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications operating from –40°C to +125°C ambient temperature |
| Undervoltage lockout with hysteresis | Prevents erratic startup by enforcing 4.1 V turn-on and 3.6 V turn-off; 0.5 V hysteresis avoids oscillation |
Applications
| PIC®/dsPIC® Microcontroller Bias Supply | 24V Industrial Input DC-DC Conversion |
|---|---|
Use Scenario: Powering 3.3 V or 5 V core/logic rails for Microchip PIC/dsPIC MCUs in engine control units or motor drives. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated bias voltage with fast transient response to MCU load steps. Use Value: Integrated switches and 0.8 V reference enable compact, high-efficiency supply meeting AEC-Q100 requirements without external FETs or compensation. |
Use Scenario: Converting unregulated 24 V factory bus to 5 V or 12 V for PLC I/O modules, sensors, or HMI displays. IC Role / Device Role / Timing Role: High-input-voltage step-down regulator handling wide line variations and load transients in industrial environments. Use Value: 30 V absolute max input rating, UVLO hysteresis, and thermal shutdown ensure reliable operation under brownouts and overload conditions. |
| Automotive Battery Regulation | Local Point of Load Regulation |
Use Scenario: Regulating 12 V vehicle battery (9–16 V nominal, up to 30 V load dump) to stable 3.3 V for infotainment SoCs or ADAS cameras. IC Role / Device Role / Timing Role: Automotive-grade DC-DC converter providing isolated, low-noise power with robust fault protection. Use Value: AEC-Q100 Grade 1 rating, +125°C junction limit, and 4.1 V UVLO start ensure cold-cranking compatibility and long-term reliability. |
Use Scenario: Generating dedicated 5 V rail for FPGA configuration, Ethernet PHY, or USB controller on a dense digital board. IC Role / Device Role / Timing Role: Compact, self-contained buck regulator placed adjacent to load to minimize IR drop and noise coupling. Use Value: MSOP-8 package with EP enables high-power density; internal soft-start prevents inrush-induced system reset during hot-plug events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP16312T-E/MSVAO | PWM-only operation (no PFM); higher quiescent current (3.8 mA vs. 44 µA) but lower output ripple and fixed 500 kHz frequency | Better suited for noise-sensitive analog/RF sections where variable-frequency PFM ripple is unacceptable | Select MCP16312T-E/MSVAO when EMI compliance or signal integrity outweighs light-load efficiency needs |
| TPS54202DRCT | Lower input range (4.5–28 V), 2 A output, 500 kHz, but no AEC-Q100 qualification or integrated high-side FET driver optimization for 30 V | Targeted at commercial/industrial applications; lacks automotive thermal and qualification rigor | Choose TPS54202DRCT only for non-automotive designs requiring higher current or TI ecosystem support |
Compared with MCP16312T-E/MSVAO and TPS54202DRCT, the MCP16311T-E/MSVAO uniquely balances automotive qualification, ultra-low quiescent current in PFM mode, and integrated high-voltage switches-making it optimal for cost-sensitive, thermally constrained automotive and industrial PoL applications where light-load efficiency matters.
Availability
MCP16311T-E/MSVAO is available at Aetrix Electronics and suitable for automotive battery regulation, 24 V industrial conversion, and PIC®/dsPIC® microcontroller bias supply requiring stable component supply across extended temperature and lifecycle demands.
Supply support for MCP16311T-E/MSVAO 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
Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, and power management ICs, serving automotive, industrial, and consumer markets with high-reliability semiconductor solutions.
The MCP16311/2 product line delivers compact, high-efficiency synchronous buck regulators optimized for automotive-grade point-of-load conversion with integrated switches, AEC-Q100 qualification, and robust thermal protection.
FAQ
What is the maximum output voltage supported by the MCP16311T-E/MSVAO?
The MCP16311T-E/MSVAO supports an output voltage range of 2.0 V to 12 V for continuous 1 A operation. While the datasheet notes a theoretical adjustment range up to 24 V, output currents above 12 V are limited to less than 1 A due to internal switch limitations and thermal constraints. For 12 V outputs, derating is required under high ambient temperatures or poor PCB thermal design.
Does the MCP16311T-E/MSVAO require external compensation components?
No, the MCP16311T-E/MSVAO features internal compensation including an integrated error amplifier and slope compensation circuitry. This eliminates the need for external RC networks typically required in voltage-mode controllers, simplifying layout and improving stability across varying output capacitors and inductors.
How does the PFM/PWM mode transition work in the MCP16311T-E/MSVAO?
The MCP16311T-E/MSVAO automatically transitions between PFM and PWM modes based on load current, input voltage, and output voltage. At light loads, it enters PFM mode-delivering burst pulses with sleep intervals-to achieve 44 µA quiescent current. As load increases, it seamlessly shifts to fixed 500 kHz PWM operation. Thresholds are VIN- and VOUT-dependent and documented in Figure 2-17 of DS20005255C.
What is the role of the BOOST pin on the MCP16311T-E/MSVAO?
The BOOST pin supplies the floating gate drive voltage for the integrated high-side N-channel MOSFET. It connects externally to the switch node (SW) via a 100 nF ceramic bootstrap capacitor. During low-side conduction, the capacitor charges; during high-side conduction, it discharges to provide the gate-source voltage needed to fully enhance the high-side switch.
Is the MCP16311T-E/MSVAO pin-compatible with the MCP16312T-E/MSVAO?
Yes, the MCP16311T-E/MSVAO and MCP16312T-E/MSVAO share identical pinout, package (MSOP-8), and electrical interface. They differ only in internal firmware: MCP16311T-E/MSVAO supports auto PFM/PWM mode, while MCP16312T-E/MSVAO is hardwired for PWM-only operation. No PCB changes are required for substitution, though system-level ripple and efficiency behavior will differ.
MCP16311T-E/MSVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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):
- 4.4V
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- 24V
- Current - Output:
- 1A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
MCP16311T-E/MSVAO FAQ
1.How can I place an order for MCP16311T-E/MSVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16311T-E/MSVAO 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 MCP16311T-E/MSVAO reliable?
The price and inventory of MCP16311T-E/MSVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP16311T-E/MSVAO is usually 5 days.
3.What payment methods are accepted for MCP16311T-E/MSVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16311T-E/MSVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16311T-E/MSVAO?
MCP16311T-E/MSVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16311T-E/MSVAO 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 MCP16311T-E/MSVAO?
For technical support, including MCP16311T-E/MSVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16311T-E/MSVAO requirements.
6.How does Aetrix verify that MCP16311T-E/MSVAO is sourced from the original manufacturer or authorized distributors?
All MCP16311T-E/MSVAO 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 MCP16311T-E/MSVAO meets industry standards.
7.What is the process for return or replacement of MCP16311T-E/MSVAO?
All MCP16311T-E/MSVAO units undergo pre-shipment inspection (PSI). If there is an issue with MCP16311T-E/MSVAO, 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 MCP16311T-E/MSVAO part is unused and in its original packaging.
Return procedure for MCP16311T-E/MSVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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