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Microchip Technology MCP16331T-E/CH
- Part No.:
- MCP16331T-E/CH
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-6
- Datasheet:
-
MCP16331T-E/CH.pdf
- Description:
- IC REG BUCK ADJ 500MA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:12,225
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Product details
Overview
MCP16331T-E/CH from Microchip Technology is a high-voltage, fixed-frequency, peak current-mode controlled buck DC-DC converter with integrated 600 mΩ N-channel MOSFET, supporting 4.4V–50V input and adjustable 2.0V–24V output at up to 500 mA continuous current in SOT-23 package; used for bias supplies in PIC®/dsPIC® microcontroller systems and industrial 24V/48V DC-DC conversion.
For engineers reviewing the MCP16331T-E/CH datasheet, MCP16331T-E/CH pinout, MCP16331T-E/CH application, or MCP16331T-E/CH equivalent, key selection criteria include input voltage headroom vs. output load, thermal performance in SOT-23, boost capacitor biasing for high-side drive, and UVLO hysteresis behavior during cold-start conditions.
Technical Context
The MCP16331T-E/CH implements a non-synchronous buck topology with internal 500 kHz oscillator and peak current-mode control, using an external Schottky diode for freewheeling. Its integrated high-side N-MOSFET requires bootstrap gate drive via BOOST–SW capacitor, with VBOOST regulated between 3.0V and 5.5V.
Internal compensation, soft-start (600 µs), undervoltage lockout (4.1V start / 3.6V stop), and overtemperature shutdown (160°C trip / 130°C recovery) are fully embedded. Feedback regulation uses a precise 0.800 V ±2% reference with external resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.4V to 50V - supports wide industrial and automotive supply rails including 12V, 24V, and 48V bus systems. |
| Output Voltage Range | 2.0V to 24V - adjustable via external resistor divider; enables single IC to serve multiple rail requirements. |
| Feedback Reference Voltage | 0.800 V ±2% - sets output accuracy; enables ≤2% total output voltage error across line/load/temperature. |
| Switching Frequency | 500 kHz (±75 kHz) - enables compact magnetics and low-profile LC filtering; reduces solution footprint. |
| Integrated MOSFET RDS(ON) | 0.6 Ω typical - minimizes conduction loss at 500 mA; contributes to >96% peak efficiency at light-to-moderate loads. |
| UVLO Threshold | 4.1 V start / 3.6 V stop with 0.5 V hysteresis - prevents erratic startup during brown-out; ensures clean enable/disable sequencing. |
| Thermal Shutdown | 160°C trip with 30°C hysteresis - protects silicon under sustained overload or poor PCB thermal design. |
Pinout & Package
Package: 6-Lead SOT-23 (JEDEC MO-178AA), surface-mount, lead-free, RoHS-compliant. Thermal resistance θJA = 190.5°C/W. Exposed pad not present - only applicable to TDFN variant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SOT-23) | BOOST | Bootstrap supply node for high-side N-MOSFET gate driver; must be decoupled to SW with 100 nF ceramic capacitor. |
| 2 (SOT-23) | EN | Enable input with internal pull-up to VIN; logic-low disables switching and reduces quiescent current to ≤10 µA. |
| 3 (SOT-23) | VFB | Feedback input referenced to 0.800 V; connects to resistor divider midpoint to set output voltage precisely. |
| 4 (SOT-23) | GND | Power and signal ground return; requires short, low-inductance trace to input/output capacitors. |
| 5 (SOT-23) | VIN | Main power input (4.4–50 V); must be decoupled with ≥4.7 µF ceramic capacitor close to pin. |
| 6 (SOT-23) | SW | Switch node connecting internal N-MOSFET drain to external inductor and Schottky diode cathode. |
Key Features
| Feature | Design Value |
|---|---|
| Peak Current-Mode Control | Enables fast transient response and inherent cycle-by-cycle current limiting without external sense resistor. |
| Internal Compensation | Eliminates need for external compensation network - simplifies design and improves stability across operating conditions. |
| Stable with Ceramic Capacitors | Supports low-ESR ceramic output caps (e.g., 2 × 10 µF X7R); avoids electrolytic or tantalum dependency. |
| Internal Soft Start | 600 µs ramp time limits inrush current and output overshoot during power-up; no external component required. |
| AEC-Q100 Qualified | Validated for automotive applications per Grade 1 (-40°C to +125°C ambient); includes HTOL, TC, ESD, and HAST testing. |
Applications
| PIC®/dsPIC® Bias Supply | Industrial 24V/48V DC-DC Conversion |
|---|---|
Use Scenario: Powering core logic and I/O of PIC18F, PIC24, or dsPIC33 microcontrollers in battery-backed or field-powered equipment. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 3.3V or 5.0V from wide-input industrial bus. Use Value: Enables single-chip solution with <2% output accuracy and <10 µA shutdown current for low-power sleep modes. |
Use Scenario: Converting unregulated 24V or 48V factory floor or telecom distribution rails to 5V/12V auxiliary rails. IC Role / Device Role / Timing Role: High-input-voltage buck controller handling line transients and wide temperature swings. Use Value: Delivers 500 mA at 96% efficiency with built-in UVLO hysteresis and thermal protection for robust operation. |
| SLA Battery-Powered Devices | AC/DC Adapter Secondary Regulation |
Use Scenario: Regulating output from sealed lead-acid (SLA) batteries (12V–36V range) to 3.3V for sensor nodes or remote I/O. IC Role / Device Role / Timing Role: Input-flexible buck regulator maintaining regulation as battery discharges below 12V. Use Value: UVLO stop at 3.6V prevents deep discharge; 0.6 Ω RDS(ON) sustains efficiency down to 500 mA at 12VOUT. |
Use Scenario: Post-regulating rectified AC/DC outputs (e.g., 12V/24V from flyback) to tightly regulated 3.3V or 5V rails. IC Role / Device Role / Timing Role: Secondary-stage DC-DC converter improving line/load regulation and ripple rejection. Use Value: Internal 0.800 V reference and peak current mode deliver <1% load regulation and fast transient recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | 4.5–65 V input, 1.5 A output, synchronous rectification, 1 MHz switching, requires external compensation. | Higher current, higher frequency, lower EMI; needs layout attention for sync FET routing and compensation tuning. | Choose LM5164QDDARQ1 when >500 mA output or synchronous efficiency >97% is required; not drop-in due to pinout and control differences. |
| TPS54202DRCT | 4.5–28 V input, 2 A output, integrated high/low-side FETs, 500 kHz, internal compensation, smaller 10-pin WSON. | Limited to ≤28 V input; unsuitable for 48V industrial or automotive cold-crank scenarios where MCP16331T-E/CH operates reliably. | Choose TPS54202DRCT for cost-sensitive 12V/24V systems needing >500 mA; verify input headroom margin before substituting. |
Compared with LM5164QDDARQ1 and TPS54202DRCT, the MCP16331T-E/CH uniquely balances ultra-wide 4.4–50 V input capability, AEC-Q100 qualification, and minimal external component count - making it optimal for space-constrained, high-reliability industrial and automotive bias supplies where 500 mA suffices.
Availability
MCP16331T-E/CH is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body electronics, and medical portable devices requiring stable component supply with long-term lifecycle assurance.
Supply support for MCP16331T-E/CH 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, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.
The MCP16331 product line delivers highly integrated, high-input-voltage buck regulators targeting space- and reliability-critical applications in automotive, industrial, and medical markets - emphasizing simplicity, thermal robustness, and AEC-Q100 compliance.
FAQ
What is the maximum continuous output current of the MCP16331T-E/CH?
The MCP16331T-E/CH delivers 500 mA continuous output current across its full input voltage range (4.4V–50V) and output voltage range (2.0V–24V) in the SOT-23 package at +25°C ambient. At 3.3V or 5V output with VIN > 12V, it supports up to 1.2A peak; at 12V output with VIN > 18V, up to 0.8A peak - both limited by thermal dissipation in the 6-lead SOT-23 package.
Does the MCP16331T-E/CH require an external Schottky diode?
Yes, the MCP16331T-E/CH is a non-synchronous buck converter and requires an external Schottky diode connected between the SW pin and GND. The diode must have ≤100V reverse voltage rating and low forward voltage (e.g., 1N4148 or equivalent) to minimize conduction loss and maintain high efficiency, especially at light loads.
How is the output voltage set on the MCP16331T-E/CH?
The output voltage of the MCP16331T-E/CH is set using an external resistor divider connected between VOUT, VFB, and GND. With a precise 0.800 V internal reference at VFB, the output voltage is calculated as VOUT = 0.800 × (1 + RTOP/RBOT). Standard 1% resistors (e.g., 10 kΩ bottom, 31.6 kΩ top for 3.3V) ensure ≤2% total output accuracy.
What is the purpose of the BOOST pin on the MCP16331T-E/CH?
The BOOST pin on the MCP16331T-E/CH supplies gate drive voltage to the internal high-side N-channel MOSFET. It must be biased 3.0V–5.5V above SW using a bootstrap capacitor (typically 100 nF) connected between BOOST and SW. This configuration enables efficient high-side switching without requiring a dedicated charge pump or external driver IC.
Is the MCP16331T-E/CH qualified for automotive applications?
Yes, the MCP16331T-E/CH passes AEC-Q100 Grade 1 reliability testing (−40°C to +125°C ambient), including HTOL, temperature cycling, ESD (HBM 4 kV), and mechanical stress validation. It is specified for automotive body electronics, infotainment power rails, and ADAS subsystem bias supplies where high input voltage tolerance and thermal resilience are critical.
MCP16331T-E/CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-6
- 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):
- 50V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- 24V
- Current - Output:
- 500mA
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MCP16331T-E/CH FAQ
1.How can I place an order for MCP16331T-E/CH through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16331T-E/CH 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 MCP16331T-E/CH reliable?
The price and inventory of MCP16331T-E/CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP16331T-E/CH is usually 5 days.
3.What payment methods are accepted for MCP16331T-E/CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16331T-E/CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16331T-E/CH?
MCP16331T-E/CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16331T-E/CH 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 MCP16331T-E/CH?
For technical support, including MCP16331T-E/CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16331T-E/CH requirements.
6.How does Aetrix verify that MCP16331T-E/CH is sourced from the original manufacturer or authorized distributors?
All MCP16331T-E/CH 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 MCP16331T-E/CH meets industry standards.
7.What is the process for return or replacement of MCP16331T-E/CH?
All MCP16331T-E/CH units undergo pre-shipment inspection (PSI). If there is an issue with MCP16331T-E/CH, 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 MCP16331T-E/CH part is unused and in its original packaging.
Return procedure for MCP16331T-E/CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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