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Microchip Technology MCP16312T-E/MNY
- Part No.:
- MCP16312T-E/MNY
- Manufacturer:
- Microchip Technology
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MCP16312T-E/MNY.pdf
- Description:
- IC REG BUCK ADJ 1A 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,805
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Product details
Overview
MCP16312T-E/MNY from Microchip Technology is a fixed-frequency, synchronous step-down DC-DC converter optimized for noise-sensitive automotive and industrial applications. It delivers up to 1 A continuous output current with input voltage range 4.4V–30V, output voltage adjustable from 2.0V to 24V via external resistor divider, and features integrated 300 mΩ high-side and 170 mΩ low-side N-channel MOSFETs. Its PWM-only 500 kHz operation ensures stable switching frequency and low output ripple in systems like PIC® microcontroller bias supplies and 24V industrial DC-DC conversion.
For engineers reviewing the MCP16312T-E/MNY datasheet, MCP16312T-E/MNY pinout, MCP16312T-E/MNY application, or MCP16312T-E/MNY equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (−40°C to +125°C), 0.8 V precision feedback reference, internal compensation, 3 µA shutdown current, and thermal shutdown at +150°C with +25°C hysteresis - all critical for reliable point-of-load regulation in harsh environments.
Technical Context
The MCP16312T-E/MNY implements fixed-frequency peak current mode control with internal slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its architecture integrates a 5.0 V internal LDO (VCC) for gate drive and analog circuitry, with dedicated AGND and PGND pins to isolate signal and power return paths.
Unlike the PFM/PWM-capable MCP16311, the MCP16312T-E/MNY disables PFM entirely - enforcing strict 425–575 kHz PWM operation across all load conditions. This eliminates variable-frequency ripple but increases light-load quiescent current to 3.8 mA (typical), making it suitable where EMI control and predictable transient response outweigh efficiency optimization.
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 microcontrollers, FPGAs, and interface ICs at point-of-load. |
| Switching Frequency | 425–575 kHz (typ. 500 kHz) - enables compact magnetics and predictable EMI filtering design. |
| Feedback Reference | 0.784–0.816 V (typ. 0.800 V) - sets output voltage accuracy and stability over temperature and line/load variation. |
| High-Side RDS(ON) | 0.3 Ω (typ.) - limits conduction loss during high-duty-cycle operation (e.g., 5 V out from 12 V in). |
| Low-Side RDS(ON) | 0.17 Ω (typ.) - reduces freewheeling losses and improves efficiency at medium-to-heavy loads. |
| UVLO Threshold | Starts at 4.1 V (typ.), stops at 3.6 V (typ.) - prevents erratic startup/shutdown during brownout conditions on battery-fed systems. |
| Thermal Shutdown | +150°C activation with +25°C hysteresis - protects die integrity during overload or poor heatsinking while enabling automatic recovery. |
Pinout & Package
The MCP16312T-E/MNY is housed in a 2 × 3 mm TDFN package with exposed thermal pad (EP), offering 52.5°C/W junction-to-ambient thermal resistance - ideal for space-constrained, thermally demanding PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB | Output voltage feedback node | Connects to resistor divider; 0.8 V reference enables precise output setting from 2.0 V to 24 V. |
| VCC | Internal 5.0 V bias regulator output | Supplies gate drivers and analog circuits; requires 1 µF X7R ceramic capacitor to AGND for stability. |
| EN | Logic-level enable input | Active-high (>1.85 V); pulls device into 3 µA shutdown when <0.4 V - enables system-level power sequencing. |
| VIN | Main power input | Accepts 4.4–30 V; must be decoupled with ≥4.7 µF ceramic capacitor close to VIN/PGND pins. |
| PGND | Power ground return | Low-impedance path for switch currents; connects internally to EP and must be tied to AGND at single point. |
| SW | Switch node | Drives external inductor and boost capacitor; experiences fast dV/dt transitions requiring short, low-inductance routing. |
| BOOST | Floating supply for high-side driver | Connected between BOOST and SW via 100 nF ceramic capacitor to sustain high-side NMOS gate drive. |
| AGND | Analog ground reference | Reference for error amplifier, UVLO, and thermal sensors; must be isolated from noisy PGND traces. |
| EP | Exposed thermal pad | Internally connected to PGND and AGND; soldering improves thermal performance and EMI shielding. |
Key Features
| Feature | Design Value |
|---|---|
| PWM-only fixed-frequency operation | Eliminates variable-frequency ripple and simplifies EMI filter design for compliance-critical automotive modules. |
| Integrated high- and low-side MOSFETs | Reduces BOM count and layout complexity - no external switches or gate drivers required for 1 A designs. |
| Internal compensation network | Enables stable loop response with minimal external components - no external compensation capacitor or resistor needed. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation - meets automotive electronics reliability requirements without derating. |
| Internal soft-start (300 µs) | Controls output voltage ramp rate to prevent inrush current and overshoot during power-up sequences. |
| Cycle-by-cycle current limiting | Protects against short-circuit and overload faults by limiting peak inductor current to 1.8 A (typ.) per switching cycle. |
Applications
| Automotive Battery Regulation | PIC®/dsPIC® Microcontroller Bias Supply |
|---|---|
Use Scenario: Regulating 12 V or 24 V vehicle battery to 3.3 V or 5 V for engine control units (ECUs) and body electronics. IC Role / Device Role / Timing Role: Primary buck regulator delivering clean, stable bias voltage with AEC-Q100-compliant thermal and electrical robustness. Use Value: Maintains 1 A output under cold-crank (4.1 V start) and load-dump (30 V transients), ensuring uninterrupted MCU operation. |
Use Scenario: Providing tightly regulated 3.3 V or 5 V supply to PIC® or dsPIC® microcontrollers in industrial controllers and sensor nodes. IC Role / Device Role / Timing Role: Local point-of-load regulator with low-noise PWM-only operation to avoid clock jitter in timing-critical peripherals. Use Value: Delivers <±1% output accuracy over temperature and line variation, supporting accurate ADC references and real-time execution. |
| 24 V Industrial Input DC-DC Conversion | Networking Systems Power Management |
Use Scenario: Converting unregulated 24 V factory floor supply to 5 V or 12 V for PLC I/O modules and fieldbus interfaces. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with integrated switches and thermal protection for long-life embedded deployment. Use Value: Achieves >90% efficiency at full load while surviving 150°C junction temperature events common in enclosed enclosures. |
Use Scenario: Generating auxiliary rails (e.g., 3.3 V, 5 V) for Ethernet PHYs, switch controllers, and management processors in enterprise routers and switches. IC Role / Device Role / Timing Role: Low-EMI, fixed-frequency DC-DC regulator meeting EN 55022 Class B conducted emissions limits. Use Value: Fixed 500 kHz switching enables deterministic filter design and avoids interference with 10/100/1000BASE-T signaling bands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4420AGL-A-P | 4.5–60 V input, 2 A output, 500 kHz, no AEC-Q100 rating, requires external compensation. | Better suited for wide-input industrial SMPS; lacks automotive qualification and integrated compensation. | Select when higher input voltage range or output current is required, and AEC-Q100 is not mandated. |
| TPS54202DDCR | 4.5–28 V input, 2 A output, 500 kHz, integrated compensation, but only qualified to –40°C to +125°C (non-AEC-Q100). | Offers higher current and same frequency, but lacks automotive stress testing and thermal hysteresis specification. | Prefer for cost-sensitive industrial designs where automotive qualification is unnecessary and 2 A capability is needed. |
Compared with MPQ4420AGL-A-P and TPS54202DDCR, the MCP16312T-E/MNY provides guaranteed AEC-Q100 Grade 1 operation, lower quiescent current in shutdown (3 µA vs. ~10 µA), and fully integrated compensation - making it the optimal choice for automotive and mission-critical industrial point-of-load regulation where qualification and design simplicity are prioritized over raw current headroom.
Availability
MCP16312T-E/MNY is available at Aetrix Electronics and suitable for automotive battery regulation, PIC®/dsPIC® microcontroller bias supply, and 24 V industrial input DC-DC conversion requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for MCP16312T-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 manufacturer specializing in microcontrollers, analog devices, and power management ICs, with a strong focus on automotive, industrial, and IoT applications.
The MCP16312T-E/MNY belongs to Microchip's high-voltage synchronous buck regulator product line, designed specifically for robust, low-noise DC-DC conversion in AEC-Q100-compliant automotive and harsh-environment industrial systems.
FAQ
What is the maximum output voltage supported by the MCP16312T-E/MNY?
The MCP16312T-E/MNY supports an output voltage range of 2.0 V to 24 V, set by an external resistor divider connected to the VFB pin. However, for outputs above 12 V, the maximum continuous output current is reduced below 1 A due to duty cycle and thermal limitations - refer to Figure 2-7 in the datasheet for VIN–IOUT derating curves.
Does the MCP16312T-E/MNY require external compensation components?
No, the MCP16312T-E/MNY includes internal compensation for its peak current mode control loop. No external compensation capacitor or resistor is needed - simplifying design and reducing board area. The internal network is optimized for stability with standard 15–22 µH inductors and ceramic output capacitors.
How does the MCP16312T-E/MNY differ from the MCP16311 in terms of operating mode?
The MCP16312T-E/MNY operates exclusively in PWM mode at a fixed 500 kHz frequency across all load conditions, whereas the MCP16311 automatically switches between PFM (for light loads) and PWM (for heavy loads). This makes the MCP16312T-E/MNY preferable in noise-sensitive applications where constant-frequency operation and low output ripple are essential.
What is the purpose of the BOOST pin on the MCP16312T-E/MNY?
The BOOST pin supplies the floating gate drive voltage for the integrated high-side N-channel MOSFET. It must be connected to the SW node through a 100 nF ceramic capacitor (CBOOST). During low-side conduction, this capacitor recharges to maintain sufficient gate-source voltage for high-side turn-on, enabling efficient synchronous rectification.
Is the MCP16312T-E/MNY pin-compatible with other packages in the MCP16311/2 family?
Yes, the MCP16312T-E/MNY in the 2 × 3 mm TDFN package shares identical pinout and function mapping with the MSOP-8 variant (e.g., MCP16312T-E/MS). Both packages use the same 9-pin assignment including EP, and support identical external circuitry - enabling drop-in replacement based on thermal or layout requirements.
MCP16312T-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)
MCP16312T-E/MNY FAQ
1.How can I place an order for MCP16312T-E/MNY through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16312T-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 MCP16312T-E/MNY reliable?
The price and inventory of MCP16312T-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 MCP16312T-E/MNY is usually 5 days.
3.What payment methods are accepted for MCP16312T-E/MNY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16312T-E/MNY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16312T-E/MNY?
MCP16312T-E/MNY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16312T-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 MCP16312T-E/MNY?
For technical support, including MCP16312T-E/MNY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16312T-E/MNY requirements.
6.How does Aetrix verify that MCP16312T-E/MNY is sourced from the original manufacturer or authorized distributors?
All MCP16312T-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 MCP16312T-E/MNY meets industry standards.
7.What is the process for return or replacement of MCP16312T-E/MNY?
All MCP16312T-E/MNY units undergo pre-shipment inspection (PSI). If there is an issue with MCP16312T-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 MCP16312T-E/MNY part is unused and in its original packaging.
Return procedure for MCP16312T-E/MNY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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