My Inquiry
My Account
Microchip Technology MCP16331T-E/CHVAO
- Part No.:
- MCP16331T-E/CHVAO
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-6
- Datasheet:
-
MCP16331T-E/CHVAO.pdf
- Description:
- IC REG BUCK ADJ 500MA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,306
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP16331T-E/CHVAO 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. It delivers up to 96% efficiency, features internal soft start, undervoltage lockout (4.1V start / 3.6V stop), and overtemperature protection - used in automotive power supplies and industrial 24V/48V DC-DC conversion.
For engineers reviewing the MCP16331T-E/CHVAO datasheet, MCP16331T-E/CHVAO pinout, MCP16331T-E/CHVAO application, or MCP16331T-E/CHVAO equivalent, key selection considerations include its 500 kHz switching frequency, 0.8 V feedback reference, 6-lead SOT-23 thermal performance (θJA = 190.5°C/W), AEC-Q100 qualification, and compatibility with ceramic output capacitors without external compensation.
Technical Context
The MCP16331T-E/CHVAO implements a non-synchronous buck topology with integrated high-side N-MOSFET and internal floating gate driver powered via BOOST pin. Its peak current-mode control architecture uses internal slope compensation and a trimmed 500 kHz oscillator to regulate output voltage across wide input and load transients.
It relies on external components including a Schottky freewheeling diode, boost capacitor (100 nF), input/output ceramic capacitors (2 × 10 µF), and an inductor (15–22 µH), with feedback set by a resistor divider referenced to the precise 0.800 V internal reference (±2% over –40°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.4 V to 50 V - supports direct connection to 12V, 24V, and 48V industrial or automotive bus rails without pre-regulation. |
| Output Voltage Range | 2.0 V to 24 V - adjustable via external resistor divider; enables single IC to serve multiple rail requirements (e.g., 3.3V for MCUs, 5V for peripherals, 12V for sensors). |
| Feedback Reference Voltage | 0.800 V ±2% - tight tolerance ensures ≤2% output voltage accuracy across temperature and line/load conditions. |
| Switching Frequency | 500 kHz (425–550 kHz) - enables compact magnetics and low-profile filter design while maintaining EMI manageability. |
| Max Continuous Output Current | 500 mA - guaranteed over full input range and temperature; up to 1.2A at 3.3V/5V with VIN > 12V in SOT-23 at +25°C ambient. |
| Integrated MOSFET RDS(ON) | 0.6 Ω - low conduction loss improves efficiency and reduces thermal stress in space-constrained SOT-23 layout. |
| Quiescent Current | 1.0–1.7 mA active / 6–10 µA shutdown - enables low-power standby modes in battery-backed or always-on systems. |
Pinout & Package
Package: 6-Lead SOT-23 (JEDEC MO-178AA), footprint-compatible with industry-standard 6-pin buck regulators; thermal resistance θJA = 190.5°C/W per JESD51-3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Power supply input | Accepts 4.4–50 V; requires local 4.7–20 µF ceramic decoupling close to pin for stable bias and switch current sourcing. |
| 2 - GND | Circuit ground reference | Common return for input/output capacitors and feedback network; shortest possible trace length minimizes noise coupling into control loop. |
| 3 - VFB | Feedback input | Monitors output via resistor divider; 0.8 V reference sets regulation point - high-impedance (±3 nA bias) allows use of MΩ-range resistors. |
| 4 - EN | Enable logic input | Internally pulled up to VIN; drives low to disable - consumes only 6–10 µA in shutdown, enabling power shedding in multi-rail systems. |
| 5 - BOOST | High-side gate drive supply | Supplies floating driver for N-MOSFET; requires 100 nF capacitor between BOOST and SW to sustain gate voltage during switching cycles. |
| 6 - SW | Switch node | Connects internally to MOSFET drain and externally to inductor/diode; high dv/dt node requiring tight layout and minimized parasitic inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Peak Current-Mode Control | Enables fast transient response and inherent cycle-by-cycle current limiting - eliminates need for external current sense resistor or compensation network. |
| Internal Soft Start | 600 µs typical ramp time prevents output overshoot and limits inrush current during startup - critical for reliable cold-start in automotive applications. |
| AEC-Q100 Qualified | Rated for automotive-grade reliability (Grade 1: –40°C to +125°C junction), including HTOL, TC, and ESD testing - suitable for under-hood and infotainment power rails. |
| Stable with Ceramic Capacitors | No external Type II/III compensation required - simplifies BOM and PCB layout while reducing solution size and cost vs. electrolytic-based alternatives. |
| Undervoltage Lockout (UVLO) | Hysteresis of 0.5 V (4.1 V start / 3.6 V stop) prevents erratic operation during brown-out or battery sag - ensures clean enable/disable sequencing. |
Applications
| PIC® MCU Bias Supply | Automotive Body Control Module |
|---|---|
Use Scenario: Powering 3.3V or 5V logic rails for PIC microcontrollers in vehicle subsystems such as door modules or lighting controllers. IC Role / Device Role / Timing Role: Primary step-down regulator converting 12V/24V battery input to stable low-voltage MCU core and I/O supply. Use Value: AEC-Q100 qualification and 4.4–50V input range ensure robust operation across cranking, load dump, and battery degradation conditions. |
Use Scenario: Generating 5V auxiliary power for CAN transceivers, LIN interfaces, and sensor signal conditioning in body electronics. IC Role / Device Role / Timing Role: High-efficiency buck converter delivering regulated 5V at up to 500 mA from unregulated vehicle battery. Use Value: 96% peak efficiency and internal MOSFET reduce heat generation in sealed enclosures; UVLO prevents reset during engine start. |
| Industrial 24V DC-DC Conversion | SLA Battery-Powered Devices |
Use Scenario: Converting 24V or 48V factory floor power to 3.3V/5V for PLC I/O, HMI displays, or fieldbus interface ICs. IC Role / Device Role / Timing Role: Compact, high-input-voltage buck regulator replacing discrete solutions in DIN-rail or panel-mount power supplies. Use Value: 6-lead SOT-23 package and ceramic-capacitor compatibility enable minimal footprint and high reliability in harsh industrial environments. |
Use Scenario: Regulating power from sealed lead-acid (SLA) batteries (12V–14.4V nominal) to 3.3V for portable medical monitors or security sensors. IC Role / Device Role / Timing Role: Primary DC-DC stage providing stable low-noise output despite wide battery voltage swing and aging effects. Use Value: 2% output voltage accuracy and low quiescent current (≤10 µA shutdown) extend runtime and maintain sensor calibration over battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14050SQDDARQ1 | 40V max input, 5A output, requires external compensation; no integrated BOOST circuitry - needs external bootstrap diode/capacitor. | Higher current capability but larger solution size; not qualified to AEC-Q100 Grade 1. | Choose when >500 mA load current or tighter EMI control (spread-spectrum option) is required; avoid if space or automotive qualification is critical. |
| TPS54260DGQR | 60V max input, 2.5A output, adjustable frequency (100kHz–2.5MHz); includes integrated BOOT diode - simpler external component count than MCP16331T-E/CHVAO. | Wider input range and higher current, but lacks AEC-Q100 certification and has higher quiescent current (110 µA vs. 6 µA shutdown). | Prefer for industrial 48V systems needing >500 mA; not recommended for automotive due to missing qualification and higher standby draw. |
Compared with LMR14050SQDDARQ1 and TPS54260DGQR, the MCP16331T-E/CHVAO offers the smallest PCB footprint (SOT-23), lowest shutdown current, and automotive qualification - making it optimal for space-constrained, battery-sensitive, and automotive-compliant designs where 500 mA output suffices.
Availability
MCP16331T-E/CHVAO is available at Aetrix Electronics and suitable for automotive body control modules, industrial 24V/48V DC-DC conversion, and SLA battery-powered medical devices requiring stable component supply and long-term lifecycle support.
Supply support for MCP16331T-E/CHVAO 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 microcontroller, analog, FPGA, and power management semiconductors, serving automotive, industrial, and consumer markets with vertically integrated silicon and development tools.
The MCP16331 product line delivers highly integrated, AEC-Q100-qualified buck regulators targeting space- and reliability-critical power conversion in automotive and industrial edge nodes - emphasizing simplicity, thermal robustness, and minimal external component count.
FAQ
What is the maximum output current capability of the MCP16331T-E/CHVAO under real-world conditions?
The MCP16331T-E/CHVAO guarantees 500 mA continuous output current across its full input voltage range (4.4V–50V) and operating temperature (–40°C to +125°C). At +25°C ambient, it delivers up to 1.2A at 3.3V/5V output with VIN > 12V, and up to 0.8A at 12V output with VIN > 18V - all in the 6-lead SOT-23 package. Thermal derating applies above +25°C per θJA = 190.5°C/W.
Does the MCP16331T-E/CHVAO require external compensation components?
No, the MCP16331T-E/CHVAO integrates full internal compensation including error amplifier and slope compensation - eliminating the need for external RC networks. This simplifies design, reduces BOM count, and ensures stability with standard ceramic output capacitors. Layout best practices (short feedback traces, proper grounding) remain essential for optimal performance.
How does the BOOST pin function in the MCP16331T-E/CHVAO, and what external components does it require?
The BOOST pin supplies the floating gate drive voltage for the internal N-MOSFET. It requires a 100 nF ceramic capacitor connected between BOOST and SW pins. For 3.3V/5V outputs, BOOST is typically tied to VOUT via a Schottky blocking diode; for other voltages (e.g., 12V), a Zener-based shunt or series regulator must generate a 3.0–5.5V bias - as detailed in Figure 4-3 of DS20005308D.
Is the MCP16331T-E/CHVAO suitable for automotive applications, and what qualifications does it hold?
Yes, the MCP16331T-E/CHVAO passes Automotive Electronics Council AEC-Q100 Grade 1 reliability testing (–40°C to +125°C junction), including HTOL, temperature cycling, and ESD (4 kV HBM). Its 4.4–50V input range, UVLO hysteresis, and overtemperature protection make it suitable for engine bay, body control, and infotainment power rails - confirmed in Microchip's official qualification report for MCP16331.
Can the MCP16331T-E/CHVAO operate with the EN pin left unconnected?
Yes - the MCP16331T-E/CHVAO features an internal pull-up on the EN pin referenced to VIN, so the device starts automatically when VIN is applied, even with EN floating. To disable the regulator, EN must be actively pulled to GND. This feature simplifies default-on designs and eliminates the need for external pull-up resistors in many applications.
MCP16331T-E/CHVAO 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 (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MCP16331T-E/CHVAO FAQ
1.How can I place an order for MCP16331T-E/CHVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16331T-E/CHVAO 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/CHVAO reliable?
The price and inventory of MCP16331T-E/CHVAO 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/CHVAO is usually 5 days.
3.What payment methods are accepted for MCP16331T-E/CHVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16331T-E/CHVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16331T-E/CHVAO?
MCP16331T-E/CHVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16331T-E/CHVAO 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/CHVAO?
For technical support, including MCP16331T-E/CHVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16331T-E/CHVAO requirements.
6.How does Aetrix verify that MCP16331T-E/CHVAO is sourced from the original manufacturer or authorized distributors?
All MCP16331T-E/CHVAO 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/CHVAO meets industry standards.
7.What is the process for return or replacement of MCP16331T-E/CHVAO?
All MCP16331T-E/CHVAO units undergo pre-shipment inspection (PSI). If there is an issue with MCP16331T-E/CHVAO, 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/CHVAO part is unused and in its original packaging.
Return procedure for MCP16331T-E/CHVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP16331T-E/CHVAO Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
