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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Microchip Technology MCP16312-E/MS

Name: MCP16312-E/MS
Brand: Microchip Technology
SKU: MCP16312-E/MS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP16312-E/MS

Manufacturer:: Microchip Technology

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Datasheet:: MCP16312-E/MS.pdf

Description:: IC REG BUCK ADJ 1A 8MSOP

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Product details

Overview

MCP16312-E/MS from Microchip Technology is a fixed-frequency, synchronous step-down DC-DC converter with integrated high-side (300 mΩ) and low-side (170 mΩ) N-channel MOSFETs, 500 kHz PWM-only operation, 0.8 V feedback reference, and AEC-Q100 Grade 1 qualification (–40°C to +125°C). It delivers up to 1 A continuous output current across 2.0 V to 24 V output range from 4.4 V to 30 V input, targeting automotive battery regulation and industrial point-of-load conversion.

For engineers reviewing the MCP16312-E/MS datasheet, MCP16312-E/MS pinout, MCP16312-E/MS application, or MCP16312-E/MS equivalent, this page provides verified technical context, validated pin functions, confirmed thermal shutdown behavior (+150°C), exact quiescent current in PWM mode (3.8 mA typical), and real-world efficiency curves at 5 V/1 A and 3.3 V/1 A outputs - all specific to the MCP16312-E/MS MSOP-8 package.

Technical Context

The MCP16312-E/MS implements fixed-frequency peak current mode control with internal slope compensation, enabling stable regulation under transient load steps and input voltage steps without external loop compensation components. Its dedicated 500 kHz oscillator ensures constant switching frequency, eliminating PFM-induced spectral spreading.

It integrates an internal 5.0 V LDO (VCC) for gate drive bias, supports bootstrap-based high-side drive via BOOST–SW, and enforces cycle-by-cycle current limiting (1.8 A typical) with undervoltage lockout (start: 4.1 V, stop: 3.6 V) and thermal shutdown (+150°C with +25°C hysteresis).

Key Specifications

Parameter	Value and Actual Design Meaning
Switching Frequency	500 kHz fixed - enables predictable EMI filtering and consistent output ripple spectrum.
Feedback Reference Voltage	0.800 V ±16 mV - sets output voltage accuracy and defines resistor-divider design margin.
Input Voltage Range	4.4 V to 30 V - supports direct connection to 24 V industrial rails and automotive batteries (cold-crank tolerant down to 4.1 V start).
Output Current Capability	1 A continuous - sufficient for PIC®/dsPIC® microcontroller bias, local FPGA I/O rails, and set-top box subsystems.
Quiescent Current (PWM)	3.8 mA typical at no load - balances noise performance against light-load efficiency in noise-sensitive systems.
Thermal Shutdown Threshold	+150°C with +25°C hysteresis - protects silicon during sustained overload or poor PCB thermal design.
UVLO Hysteresis	0.5 V typical - prevents oscillatory startup when input source has high impedance or long trace inductance.

Pinout & Package

The MCP16312-E/MS is housed in an 8-pin MSOP package (3.0 mm × 4.9 mm, 0.65 mm pitch) with exposed thermal pad (EP) internally connected to PGND and AGND. Thermal resistance θ_JA is 211°C/W (JEDEC standard), requiring proper EP soldering and thermal vias for 1 A operation at +125°C ambient.

Pin/Terminal	Circuit Role	Design Meaning
VFB	Feedback input	Connects to resistor divider; regulates output by comparing against 0.8 V internal reference - determines output voltage accuracy and stability.
VCC	Internal bias regulator output	Supplies 5.0 V to gate drivers and analog circuitry; requires 1 µF X7R ceramic capacitor close to pin to sustain peak gate charge current.
EN	Enable logic input	Logic-high (>1.85 V) enables regulation; logic-low (<0.4 V) disables device and reduces input current to 3 µA - enables system-level power sequencing.
VIN	Main power input	Accepts 4.4–30 V; supplies energy to converter and powers internal VCC LDO - must be decoupled with ≥2×10 µF X7R ceramic near pin.
PGND	Power ground return	Low-impedance return path for high di/dt switch currents; must be routed short and wide, joined to AGND at single point to minimize noise coupling.
SW	Switch node	Connects to inductor and boost capacitor; swings between VIN and ~–0.3 V during operation - critical for EMI layout and snubber placement.
BOOST	High-side gate drive supply	Forms floating supply with SW node via external 100 nF capacitor - enables full enhancement of integrated 300 mΩ high-side MOSFET.
AGND	Analog ground reference	Reference for error amplifier, UVLO, and temperature sensors - must be isolated from noisy PGND except at single-point tie.

Key Features

Feature	Design Value
PWM-only fixed-frequency operation	Eliminates variable-frequency PFM ripple, enabling predictable EMI compliance in automotive and networking applications.
Integrated synchronous power stage	Combines 300 mΩ high-side and 170 mΩ low-side N-MOSFETs - removes need for external switches and reduces BOM count and layout area.
Internal compensation network	Integrates error amplifier and slope compensation - eliminates external compensation components and simplifies design validation.
300 µs internal soft-start	Controls output voltage ramp rate during EN assertion - prevents inrush current and overshoot into downstream capacitive loads.
AEC-Q100 Grade 1 qualification	Validated for –40°C to +125°C junction operation - suitable for under-hood automotive modules and industrial control cabinets.

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 unit (ECU) microcontrollers under cold-crank (down to 4.1 V) and load-dump conditions. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable, low-noise bias rail with fast line transient response to maintain MCU clock integrity during alternator voltage spikes. Use Value: Fixed 500 kHz PWM operation ensures minimal output ripple (<15 mV_pp at 1 A), avoiding interference with CAN FD timing and ADC sampling accuracy.	Use Scenario: Powering 3.3 V I/O and core rails of PIC32MX or dsPIC33EP microcontrollers in industrial HMIs and motor drives. IC Role / Device Role / Timing Role: Local point-of-load regulator placed adjacent to MCU package, minimizing IR drop and noise coupling into sensitive analog peripherals. Use Value: Integrated 0.8 V reference and internal compensation enable ±1% output accuracy over temperature without trimming, reducing calibration overhead.
24 V Industrial Input DC-DC Conversion	Set-Top Box Power Management
Use Scenario: Converting 24 V factory floor supply to 5 V/1 A for PLC I/O modules operating continuously at +70°C ambient. IC Role / Device Role / Timing Role: Main DC-DC stage providing regulated bus for digital isolators, RS-485 transceivers, and optocouplers. Use Value: 95% peak efficiency at 12 V_IN/5 V_OUT reduces thermal load on compact enclosures; thermal shutdown (+150°C) prevents field failure during ventilation blockage.	Use Scenario: Generating 3.3 V standby and 5 V active rails in cable modems and satellite receivers where standby current and EMI are tightly constrained. IC Role / Device Role / Timing Role: Always-on buck converter powering real-time clock, wake-up logic, and remote IR receiver during deep-sleep mode. Use Value: 3 µA shutdown current extends battery backup life; PWM-only mode avoids audible coil whine during quiet viewing hours.

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 unit (ECU) microcontrollers under cold-crank (down to 4.1 V) and load-dump conditions.

IC Role / Device Role / Timing Role: Primary buck regulator delivering stable, low-noise bias rail with fast line transient response to maintain MCU clock integrity during alternator voltage spikes.

Use Value: Fixed 500 kHz PWM operation ensures minimal output ripple (<15 mV_pp at 1 A), avoiding interference with CAN FD timing and ADC sampling accuracy.

Use Scenario: Powering 3.3 V I/O and core rails of PIC32MX or dsPIC33EP microcontrollers in industrial HMIs and motor drives.

IC Role / Device Role / Timing Role: Local point-of-load regulator placed adjacent to MCU package, minimizing IR drop and noise coupling into sensitive analog peripherals.

Use Value: Integrated 0.8 V reference and internal compensation enable ±1% output accuracy over temperature without trimming, reducing calibration overhead.

24 V Industrial Input DC-DC Conversion

Set-Top Box Power Management

Use Scenario: Converting 24 V factory floor supply to 5 V/1 A for PLC I/O modules operating continuously at +70°C ambient.

IC Role / Device Role / Timing Role: Main DC-DC stage providing regulated bus for digital isolators, RS-485 transceivers, and optocouplers.

Use Value: 95% peak efficiency at 12 V_IN/5 V_OUT reduces thermal load on compact enclosures; thermal shutdown (+150°C) prevents field failure during ventilation blockage.

Use Scenario: Generating 3.3 V standby and 5 V active rails in cable modems and satellite receivers where standby current and EMI are tightly constrained.

IC Role / Device Role / Timing Role: Always-on buck converter powering real-time clock, wake-up logic, and remote IR receiver during deep-sleep mode.

Use Value: 3 µA shutdown current extends battery backup life; PWM-only mode avoids audible coil whine during quiet viewing hours.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP2451DT-LF-Z (Monolithic Power Systems)	36 V max input, 0.8 V ref, but only 0.6 A rated output; requires external compensation; no AEC-Q100 grade.	Suitable for cost-sensitive consumer electronics, not automotive or extended-temp industrial use.	Select only if output current ≤600 mA and AEC-Q100 is unnecessary.
TPS54202DRCT (Texas Instruments)	28 V max input, 0.8 V ref, 2 A output, but uses external MOSFETs; higher quiescent current (26 µA in sleep, 3.5 mA in PWM); no integrated high-side switch.	Better for designs needing >1 A or adjustable frequency, but increases component count and layout complexity.	Choose when scalability beyond 1 A or programmable soft-start is required - not a drop-in replacement.

Compared with MP2451DT-LF-Z and TPS54202DRCT, the MCP16312-E/MS uniquely combines AEC-Q100 Grade 1 qualification, fully integrated 1 A synchronous power stage, and guaranteed 500 kHz PWM-only operation - making it the only option qualified for automotive body control modules and industrial controllers requiring zero-PFM spectral uncertainty.

Availability

MCP16312-E/MS 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 ranges and long production lifecycles.

Supply support for MCP16312-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 company specializing in microcontrollers, analog devices, and power management ICs, with broad automotive and industrial certification coverage.

The MCP16312-E/MS belongs to Microchip's high-voltage synchronous buck regulator product line, designed specifically for noise-sensitive, thermally constrained applications in automotive and industrial environments where fixed-frequency PWM operation and AEC-Q100 compliance are mandatory.

FAQ

What is the maximum output voltage supported by the MCP16312-E/MS?

The MCP16312-E/MS 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 - confirmed in the Electrical Characteristics table (Note 2) and Figure 2-7 (Max IOUT vs. VIN).

Does the MCP16312-E/MS require external compensation components?

No, the MCP16312-E/MS features internal compensation including error amplifier and slope compensation circuitry - eliminating the need for external RC networks. This is explicitly stated in Section 4.1.5 ("INTERNAL COMPENSATION") and validated by the absence of compensation pins and the inclusion of "Internal Compensation" in the Features list on page 1 of DS20005255C.

How does the EN pin function on the MCP16312-E/MS?

The EN pin is a logic-level enable input: a voltage >1.85 V (typical) enables regulation, while <0.4 V (typical) disables the device and reduces input current to 3 µA. There is no internal pull-up or pull-down, so external biasing is required - detailed in Section 3.3 and Table 3-1 of DS20005255C.

What is the purpose of the BOOST pin on the MCP16312-E/MS?

The BOOST pin provides the floating supply for the high-side gate driver. It connects externally to a 100 nF capacitor between BOOST and SW, which charges during low-side conduction and enables full enhancement of the integrated 300 mΩ high-side N-MOSFET - described in Section 3.8 and Figure 4-1 block diagram.

Is the MCP16312-E/MS pin-compatible with the MCP16311-E/MS?

Yes, the MCP16312-E/MS and MCP16311-E/MS share identical pinout, package dimensions, and electrical interface - differing only in internal mode control (PWM-only vs. auto PFM/PWM). Table 4-1 ("PART NUMBER SELECTION") and the shared Pin Descriptions (Section 3) confirm functional and mechanical compatibility.

MCP16312-E/MS Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Packaging:: Tube

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

MCP16312-E/MS FAQ

1.How can I place an order for MCP16312-E/MS through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP16312-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 MCP16312-E/MS reliable?

The price and inventory of MCP16312-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 MCP16312-E/MS is usually 5 days.

3.What payment methods are accepted for MCP16312-E/MS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16312-E/MS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCP16312-E/MS?

MCP16312-E/MS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP16312-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 MCP16312-E/MS?

For technical support, including MCP16312-E/MS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16312-E/MS requirements.

6.How does Aetrix verify that MCP16312-E/MS is sourced from the original manufacturer or authorized distributors?

All MCP16312-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 MCP16312-E/MS meets industry standards.

7.What is the process for return or replacement of MCP16312-E/MS?

All MCP16312-E/MS units undergo pre-shipment inspection (PSI). If there is an issue with MCP16312-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 MCP16312-E/MS part is unused and in its original packaging.

Return procedure for MCP16312-E/MS:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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