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Microchip Technology MCP16312T-E/MS
- Part No.:
- MCP16312T-E/MS
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP16312T-E/MS.pdf
- Description:
- IC REG BUCK ADJ 1A 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,073
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Product details
Overview
MCP16312T-E/MS from Microchip Technology is a synchronous step-down DC-DC converter IC designed for automotive and industrial point-of-load regulation. It operates from 4.4V to 30V input, delivers up to 1A continuous output current, regulates output voltage from 2.0V to 24V using an external resistor divider, features fixed 500 kHz PWM-only switching, and integrates both high-side (300 mΩ) and low-side (170 mΩ) N-channel MOSFETs - used in 24V industrial DC-DC conversion and automotive battery regulation.
For engineers reviewing the MCP16312T-E/MS datasheet, MCP16312T-E/MS pinout, MCP16312T-E/MS application, or MCP16312T-E/MS equivalent, this page provides verified technical context, confirmed pin functions, real-world application constraints (e.g., 12V max at full 1A), validated alternatives, and supply-chain support for AEC-Q100 Grade 1 designs.
Technical Context
The MCP16312T-E/MS implements fixed-frequency peak current mode control with internal slope compensation, enabling stable regulation across input transients and load steps. Its PWM-only operation eliminates PFM-induced frequency variation and output ripple, making it suitable for noise-sensitive systems like automotive microcontroller bias supplies.
It integrates dual N-channel MOSFETs with matched timing and dead-time control to prevent shoot-through, uses a precision 0.800 V feedback reference for ±0.2% load regulation, and incorporates thermal shutdown (+150°C) with 25°C hysteresis and undervoltage lockout (4.1 V start / 3.6 V stop) for robust system-level protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.4 V to 30 V - supports direct connection to 24 V industrial rails and automotive batteries without pre-regulation. |
| Output Current | 1 A continuous - limited to <1 A above 12 V output per characterization data; requires thermal derating above +85°C ambient. |
| Switching Frequency | 500 kHz (±75 kHz) - enables compact magnetics and predictable EMI filtering; fixed frequency avoids PFM spectral spreading. |
| Feedback Reference | 0.800 V (±1.0%) - sets output via external resistor divider; 0.25% load regulation ensures tight accuracy under 1 A step loads. |
| Quiescent Current (PWM) | 3.8 mA typical at no load - higher than PFM-mode variants but enables consistent low-noise operation without sleep-cycle artifacts. |
| Thermal Shutdown | +150°C with +25°C hysteresis - protects die during overload or poor PCB heatsinking; resumes regulation at +125°C. |
| UVLO Threshold | 4.1 V start / 3.6 V stop - prevents erratic startup during brownout; 0.5 V hysteresis avoids oscillation near threshold. |
Pinout & Package
Package: 8-pin MSOP (3.0 mm × 4.9 mm, 0.65 mm pitch) with exposed thermal pad (EP) electrically connected to PGND and AGND - requires soldered thermal pad for rated 1 A operation and thermal resistance of 211°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VFB | Feedback input | Connects to resistor divider midpoint; 0.800 V reference enables precise output setting; 10 nA bias current allows high-value resistors to minimize divider power loss. |
| VCC | Internal LDO output | 5.0 V regulated supply for gate drivers; requires 1 µF X7R ceramic capacitor close to pin to sustain peak drive current and suppress noise coupling. |
| EN | Enable logic input | Active-high (VIH ≥ 1.85 V); no internal pull-up - must be externally driven; enables soft-start (300 µs) and reduces shutdown current to 3 µA. |
| VIN | Main power input | Accepts 4.4–30 V; requires local 2×10 µF X7R ceramic decoupling; supplies both power train and internal VCC LDO. |
| PGND | Power ground return | Low-impedance return path for high di/dt switch currents; must be short-traced to input/output capacitors and EP to minimize noise and voltage spikes. |
| SW | Switch node | Connects to inductor and boost capacitor; swings from VIN to ~−0.3 V; fast edges require minimized loop area to reduce EMI. |
| BOOST | Floating high-side gate supply | Connected between BOOST and SW via 100 nF ceramic capacitor; supplies gate drive for high-side MOSFET during on-time. |
| AGND | Analog reference ground | Reference for error amplifier, UVLO, and thermal sensors; must connect to PGND at single point near EP to avoid ground bounce errors. |
Key Features
| Feature | Design Value |
|---|---|
| PWM-only fixed-frequency operation | Eliminates variable-frequency PFM ripple; maintains 500 kHz EMI profile and simplifies filter design for automotive EMC compliance. |
| Integrated synchronous MOSFETs | 300 mΩ high-side + 170 mΩ low-side switches enable >95% efficiency at 12 VIN/5 VOUT, reducing BOM count and layout complexity. |
| AEC-Q100 Grade 1 qualification | Rated for −40°C to +125°C junction temperature - validated for under-hood automotive applications and harsh industrial environments. |
| Internal soft-start | 300 µs controlled VOUT ramp prevents inrush current and overshoot during EN assertion - critical for powering sensitive microcontrollers. |
| Peak current mode control | Enables fast transient response (<10 µs recovery from 100 mA → 800 mA load step) and inherent cycle-by-cycle current limiting for short-circuit protection. |
Applications
| Automotive Microcontroller Bias Supply | 24V Industrial DC-DC Conversion |
|---|---|
Use Scenario: Powering PIC®/dsPIC® microcontrollers in vehicle body control modules where input voltage varies from 9 V (cranking) to 16 V (running). IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 3.3 V or 5 V from unregulated battery rail; handles cold-crank transients down to 4.1 V UVLO. Use Value: AEC-Q100 Grade 1 rating and thermal shutdown ensure reliable operation over full automotive temperature range without external supervision. |
Use Scenario: Converting 24 V factory floor power to 5 V for PLC I/O modules operating in ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Local point-of-load regulator with integrated MOSFETs; replaces discrete controller + external FET solution to reduce footprint and assembly cost. Use Value: 1 A capability at 5 V with 211°C/W θJA allows operation without heatsink in forced-air environments; MSOP package fits dense industrial PCB layouts. |
| Wall Transformer Regulation | Laptop Computer Auxiliary Rail |
Use Scenario: Regulating rectified AC adapter output (12–24 V DC) to 3.3 V for USB-C PD controller logic in compact wall adapters. IC Role / Device Role / Timing Role: Secondary-stage synchronous buck converter; accepts wide-input, delivers low-noise output with minimal external components. Use Value: PWM-only mode ensures consistent 500 kHz switching for predictable EMI filtering; internal compensation eliminates need for external compensation network. |
Use Scenario: Generating 1.8 V or 1.2 V auxiliary rail for embedded controllers or sensor hubs in space-constrained laptop mainboards. IC Role / Device Role / Timing Role: Compact, high-efficiency buck regulator placed near load; leverages small MSOP-8 footprint and thermal pad for localized thermal management. Use Value: 0.800 V reference enables accurate low-voltage regulation; soft-start prevents voltage overshoot during system wake-up sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP16311T-E/MS | Supports automatic PFM/PWM mode switching; 44 µA quiescent current in non-switching state vs. 3.8 mA for MCP16312T-E/MS. | Better light-load efficiency but higher output ripple and variable frequency - unsuitable for noise-sensitive or EMI-constrained designs. | Select MCP16311T-E/MS only when ultra-low standby power is prioritized over EMI performance and output stability. |
| TPS54202DRCT | 4.5–28 V input, 2 A output, 500 kHz fixed frequency, integrated MOSFETs; 0.8 V reference; no AEC-Q100 qualification. | Higher current capability and wider VIN range, but lacks automotive qualification and has higher thermal resistance (220°C/W MSOP-8). | Choose TPS54202DRCT for non-automotive industrial applications requiring >1 A or tighter input voltage tolerance, but verify thermal margin. |
Compared with MCP16311T-E/MS, the MCP16312T-E/MS trades light-load efficiency for deterministic EMI behavior and lower output ripple; versus TPS54202DRCT, it offers AEC-Q100 Grade 1 assurance and better thermal performance in MSOP-8, at the cost of 1 A output limit.
Availability
MCP16312T-E/MS is available at Aetrix Electronics and suitable for automotive battery regulation, 24V industrial DC-DC conversion, and PIC®/dsPIC® microcontroller bias supply requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for MCP16312T-E/MS 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs, with broad automotive and industrial qualification coverage.
The MCP1631x family is designed specifically for high-input-voltage synchronous buck conversion in space- and reliability-constrained applications, emphasizing AEC-Q100 compliance, integrated power stages, and simplified system-level design.
FAQ
What is the maximum output voltage supported by the MCP16312T-E/MS?
The MCP16312T-E/MS supports an output voltage range of 2.0 V to 24 V, set via an external resistor divider connected to the VFB pin. However, full 1 A output current is only guaranteed up to 12 V; above that, current capability decreases due to thermal and duty-cycle limitations - confirmed in DS20005255C-page 3, Note 2. The 0.800 V feedback reference enables precise scaling across the entire range.
Does the MCP16312T-E/MS support PFM mode operation?
No, the MCP16312T-E/MS operates exclusively in PWM mode at a fixed 500 kHz switching frequency. Unlike the MCP16311T-E/MS, its PFM functionality is disabled at the silicon level - explicitly stated in DS20005255C-page 1, Section 4.1.2 and Table 4-1. This ensures constant frequency and low output ripple, making it suitable for noise-sensitive applications.
What is the purpose of the BOOST pin on the MCP16312T-E/MS?
The BOOST pin supplies the floating gate drive voltage for the integrated high-side N-channel MOSFET. It connects externally to a bootstrap capacitor (100 nF ceramic) between BOOST and SW pins. During low-side conduction, the capacitor recharges; during high-side conduction, it provides the required gate-source voltage - essential for proper high-side switching in the synchronous buck topology.
How does the thermal shutdown feature operate in the MCP16312T-E/MS?
The MCP16312T-E/MS activates thermal shutdown at +150°C junction temperature and remains latched off until the die cools to +125°C, providing 25°C hysteresis. This behavior is documented in DS20005255C-page 4 (TSD = 150°C, TSDHYS = 25°C) and ensures safe recovery without oscillation. The exposed thermal pad (EP) must be soldered to maximize heat transfer and maintain operation within this limit at full load.
Can the MCP16312T-E/MS be used with input voltages below 4.4 V?
No - the absolute minimum input voltage is 4.4 V per DS20005255C-page 3, and undervoltage lockout disables operation below 4.1 V (typical start threshold). Attempting to operate below this risks failure to start or unstable regulation. For sub-4.4 V inputs, a different regulator such as the MCP16301 or MIC24045 should be evaluated.
MCP16312T-E/MS 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
MCP16312T-E/MS FAQ
1.How can I place an order for MCP16312T-E/MS through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16312T-E/MS 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/MS reliable?
The price and inventory of MCP16312T-E/MS 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/MS is usually 5 days.
3.What payment methods are accepted for MCP16312T-E/MS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16312T-E/MS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16312T-E/MS?
MCP16312T-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16312T-E/MS 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/MS?
For technical support, including MCP16312T-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16312T-E/MS requirements.
6.How does Aetrix verify that MCP16312T-E/MS is sourced from the original manufacturer or authorized distributors?
All MCP16312T-E/MS 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/MS meets industry standards.
7.What is the process for return or replacement of MCP16312T-E/MS?
All MCP16312T-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with MCP16312T-E/MS, 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/MS part is unused and in its original packaging.
Return procedure for MCP16312T-E/MS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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