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Microchip Technology MCP16311T-E/MNY
- Part No.:
- MCP16311T-E/MNY
- Manufacturer:
- Microchip Technology
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MCP16311T-E/MNY.pdf
- Description:
- IC REG BUCK ADJ 1A 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:11,499
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Product details
Overview
MCP16311T-E/MNY from Microchip Technology is a synchronous step-down DC-DC converter with integrated high-side (300 mΩ) and low-side (170 mΩ) N-channel MOSFETs, 500 kHz fixed-frequency PWM/PFM operation, 0.8 V reference voltage, and AEC-Q100 Grade 1 qualification for automotive battery regulation.
For engineers reviewing the MCP16311T-E/MNY datasheet, MCP16311T-E/MNY pinout, MCP16311T-E/MNY application, or MCP16311T-E/MNY equivalent, this device supports 4.4V–30V input, 2.0V–24V adjustable output, 1A continuous current, peak current mode control, and thermal shutdown at +150°C with 25°C hysteresis - critical for industrial and automotive point-of-load designs.
Technical Context
The MCP16311T-E/MNY implements fixed-frequency peak current mode control with internal slope compensation to ensure stability across wide VIN/VOUT ranges and load transients. Its dual-mode PFM/PWM operation dynamically selects light-load efficiency (PFM, 44 µA quiescent) or noise-sensitive fixed-frequency regulation (PWM, 500 kHz).
It integrates an internal 5.0 V LDO (VCC) for gate drive bias, undervoltage lockout (4.1 V start / 3.6 V stop), and cycle-by-cycle current limiting. The BOOST–SW bootstrap circuit enables high-side NMOS switching, while separate AGND and PGND pins minimize noise coupling in high-dI/dt paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.4 V to 30 V - supports direct connection to 12 V/24 V automotive and industrial rails without pre-regulation. |
| Output Current | 1 A continuous - sufficient for local biasing of PIC®/dsPIC® microcontrollers or FPGA I/O banks. |
| Feedback Reference | 0.800 V ±16 mV - enables precise output setting from 2.0 V to 24 V using standard resistor dividers. |
| Switching Frequency | 425–575 kHz (typ. 500 kHz) - balances EMI performance, inductor size, and transient response. |
| Quiescent Current | 44 µA (non-switching, PFM mode) - extends battery life in always-on automotive modules. |
| UVLO Threshold | 4.1 V start / 3.6 V stop with 0.5 V hysteresis - prevents erratic startup during cold-cranking or brownout conditions. |
| Thermal Shutdown | +150°C activation with +25°C hysteresis - protects silicon under sustained overload or poor heatsinking. |
Pinout & Package
Package: 8-pin 2 × 3 mm TDFN with exposed thermal pad (EP), rated θJA = 52.5°C/W - optimized for compact, thermally demanding PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB | Feedback input | Connects to resistor divider; regulates output by comparing against 0.8 V internal reference. |
| VCC | Internal bias regulator output | Supplies 5.0 V to gate drivers; requires 1 µF X7R ceramic capacitor to AGND for stable high-current pulses. |
| EN | Enable logic input | Logic-high (>1.85 V) enables regulation; logic-low (<0.4 V) disables with 3 µA shutdown current. |
| VIN | Main power input | Accepts 4.4–30 V; must be decoupled with ≥2 × 10 µF X7R ceramic capacitors near pin. |
| PGND | Power ground return | Low-impedance path for high di/dt switch currents; connects internally to EP and SW node return. |
| SW | Switch node | Drives external inductor; swings between VIN and ~−0.3 V during freewheeling; requires short trace routing. |
| BOOST | Bootstrap supply | Connects to SW via 100 nF ceramic capacitor; supplies gate drive voltage for high-side NMOS. |
| AGND | Analog ground reference | Reference for error amplifier, UVLO, and thermal sensors; must connect to PGND at single point. |
| EP | Exposed thermal pad | Internally tied to PGND and AGND; mandatory solder connection for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous switches | 300 mΩ high-side + 170 mΩ low-side NMOS - eliminates external FETs and reduces BOM count and layout area. |
| Automatic PFM/PWM mode selection | Switches to PFM below load threshold (e.g., <25 mA at 12 V IN / 5 V OUT) - improves light-load efficiency without external control. |
| Internal compensation | No external compensation components required - simplifies design and ensures stability with recommended 15–22 µH inductors. |
| Soft-start time | 300 µs (EN low-to-high) - limits inrush current and prevents output overshoot during power-up. |
| AEC-Q100 Grade 1 qualification | Rated for −40°C to +125°C junction temperature - validated for under-hood automotive applications. |
Applications
| PIC®/dsPIC® Microcontroller Bias Supply | 24V Industrial Input DC-DC Conversion |
|---|---|
Use Scenario: Powering 3.3 V or 5 V core/I/O rails for automotive-grade PIC® microcontrollers in body control modules. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated local supply with fast transient response to MCU load steps. Use Value: Integrated switches and 0.8 V reference enable accurate, low-noise biasing without external FETs or precision references. |
Use Scenario: Converting unregulated 24 V factory bus to 5 V or 12 V for PLC I/O modules or sensor interfaces. IC Role / Device Role / Timing Role: High-input-voltage step-down regulator handling wide input transients and EMI-rich industrial environments. Use Value: 30 V absolute max rating, UVLO hysteresis, and separate AGND/PGND reduce susceptibility to rail collapse and ground bounce. |
| Automotive Battery Regulation | Local Point of Load Regulation |
Use Scenario: Regulating 12 V vehicle battery (4.5–16 V cranking range) to stable 3.3 V for infotainment SoC peripherals. IC Role / Device Role / Timing Role: Automotive-qualified buck controller maintaining regulation during cold-crank and load-dump events. Use Value: AEC-Q100 Grade 1 rating, thermal shutdown with hysteresis, and 4.1 V UVLO start ensure reliable operation across automotive temperature extremes. |
Use Scenario: Providing dedicated 1.8 V or 2.5 V supply to FPGA configuration banks or high-speed SerDes receivers on dense digital boards. IC Role / Device Role / Timing Role: Compact, thermally efficient point-of-load regulator minimizing voltage drop and noise coupling. Use Value: 2 × 3 mm TDFN package with EP enables high-power density; peak current mode control delivers <10 µs transient recovery. |
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/MNY | PWM-only operation (no PFM); higher quiescent current (3.8 mA vs. 44 µA) at no load; identical pinout and package. | Better suited for noise-sensitive applications (e.g., RF bias, ADC reference) where fixed 500 kHz frequency and lower ripple are prioritized over light-load efficiency. | Select MCP16312T-E/MNY when EMI compliance or constant-frequency operation outweighs battery-life concerns. |
| LM5164QDDARQ1 | Wider input range (3 V–65 V); higher max output current (1.5 A); requires external high-side FET; different pinout and compensation scheme. | Targeted at higher-voltage industrial or commercial systems (e.g., PoE, telecom) where 30 V input ceiling is insufficient. | Choose LM5164QDDARQ1 only if input exceeds 30 V or >1 A output is required - not a drop-in replacement. |
Compared with MCP16312T-E/MNY and LM5164QDDARQ1, the MCP16311T-E/MNY uniquely balances automotive-grade reliability, integrated FETs, and adaptive PFM/PWM efficiency - making it optimal for cost- and space-constrained 12 V/24 V embedded systems requiring both low quiescent current and robust transient performance.
Availability
MCP16311T-E/MNY is available at Aetrix Electronics and suitable for automotive battery regulation, industrial 24 V DC-DC conversion, and local point-of-load regulation requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for MCP16311T-E/MNY 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 is a global semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with a strong focus on automotive, industrial, and aerospace reliability standards.
The MCP16311/2 product line was designed specifically for high-efficiency, integrated synchronous buck conversion in space-constrained, thermally demanding applications - emphasizing AEC-Q100 qualification, internal compensation, and seamless PFM/PWM transition.
FAQ
What is the maximum output voltage supported by the MCP16311T-E/MNY?
The MCP16311T-E/MNY supports an output voltage range of 2.0 V to 24 V, set via an external resistor divider referenced to its 0.8 V internal feedback voltage. For outputs above 12 V, maximum continuous output current is reduced below 1 A due to duty cycle and thermal constraints - consult Figure 2-7 in DS20005255C for VIN–IOUT derating curves. The MCP16311T-E/MNY maintains regulation only when VIN exceeds VOUT plus headroom voltage.
Does the MCP16311T-E/MNY require external compensation components?
No, the MCP16311T-E/MNY features fully internal compensation, including error amplifier and slope compensation circuitry, eliminating the need for external RC networks. This simplifies design and ensures stable operation with recommended inductors (15–22 µH) and ceramic output capacitors. The MCP16311T-E/MNY achieves this through integrated current-sense replication and fixed-frequency peak current mode control architecture.
How does the PFM/PWM mode transition work in the MCP16311T-E/MNY?
The MCP16311T-E/MNY automatically transitions between PFM and PWM modes based on load current, input voltage, and output voltage - as characterized in Figure 2-17. At light loads (e.g., <25 mA at 12 V IN / 5 V OUT), it enters PFM mode with burst pulses and 44 µA quiescent current; above the threshold, it locks to fixed 500 kHz PWM. The MCP16311T-E/MNY uses two internal comparators - one monitoring VFB hysteresis and another tracking minimum duty cycle - to trigger mode switching without external intervention.
What is the purpose of the separate AGND and PGND pins on the MCP16311T-E/MNY?
The MCP16311T-E/MNY separates analog ground (AGND) and power ground (PGND) to isolate noise-sensitive control circuitry (error amplifier, reference, UVLO) from high-di/dt switch return paths. AGND serves as the reference for feedback and internal bias; PGND carries pulsed inductor current and connects internally to the EP thermal pad. They must join at a single-point star ground on the PCB to prevent ground loops while maintaining signal integrity - a critical layout requirement specified in Section 3.5–3.6 of DS20005255C.
Is the MCP16311T-E/MNY pin-compatible with the MCP16312T-E/MNY?
Yes, the MCP16311T-E/MNY and MCP16312T-E/MNY share identical pinout, package (2 × 3 mm TDFN), and electrical interface - differing only in internal firmware enabling PFM mode (MCP16311) or disabling it (MCP16312). Both support the same VIN, VOUT, and IOUT ranges, and use identical external components. This allows direct substitution in existing designs when switching between efficiency-optimized (MCP16311T-E/MNY) and noise-optimized (MCP16312T-E/MNY) operation.
MCP16311T-E/MNY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN 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):
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
MCP16311T-E/MNY FAQ
1.How can I place an order for MCP16311T-E/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16311T-E/MNY 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/MNY reliable?
The price and inventory of MCP16311T-E/MNY 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/MNY is usually 5 days.
3.What payment methods are accepted for MCP16311T-E/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16311T-E/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16311T-E/MNY?
MCP16311T-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16311T-E/MNY 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/MNY?
For technical support, including MCP16311T-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16311T-E/MNY requirements.
6.How does Aetrix verify that MCP16311T-E/MNY is sourced from the original manufacturer or authorized distributors?
All MCP16311T-E/MNY 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/MNY meets industry standards.
7.What is the process for return or replacement of MCP16311T-E/MNY?
All MCP16311T-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with MCP16311T-E/MNY, 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/MNY part is unused and in its original packaging.
Return procedure for MCP16311T-E/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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