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

Microchip Technology MCP16412-I/UN

Name: MCP16412-I/UN
Brand: Microchip Technology
SKU: MCP16412-I/UN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP16412-I/UN

Manufacturer:: Microchip Technology

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Datasheet:: MCP16412-I/UN.pdf

Description:: IC REG BOOST ADJ 600MA 10MSOP

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Product details

Overview

MCP16412-I/UN from Microchip Technology is a synchronous step-up DC-DC converter with automatic input-to-output bypass mode, designed for single-cell or two-cell battery-powered systems. It delivers up to 450 mA output current at 5.0 V from 3.6 V input, operates down to 0.8 V post-startup, features 500 kHz PWM switching, and achieves 96% peak efficiency-enabling long runtime in Bluetooth headsets and portable health monitors.

For engineers reviewing the MCP16412-I/UN datasheet, MCP16412-I/UN pinout, MCP16412-I/UN application, or MCP16412-I/UN equivalent, key selection criteria include its 5 μA quiescent current in PFM mode, programmable UVLO/LBO, output discharge capability, 10-pin MSOP package, and auto-bypass behavior critical for Li-ion and alkaline/NiMH battery voltage tracking.

Technical Context

The MCP16412-I/UN implements a synchronous boost architecture with integrated high- and low-side MOSFETs, enabling efficient power conversion without external switches. Its auto-bypass mode activates when VIN ≥ VOUT − 0.2 V, eliminating switching losses and reducing quiescent current to 2.3 μA in shutdown.

It supports fixed 500 kHz PWM operation (not adaptive PFM/PWM), includes internal compensation, soft-start control to limit inrush current, and offers selectable shutdown states-including output discharge-making it suitable for low-power wake-up and retention scenarios in IoT endpoints.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	0.8 V (after startup) to 5.25 V - enables operation across full discharge curve of single Li-ion (3.0–4.2 V) or two alkaline/NiMH (1.0–3.2 V) cells.
Output Current Capability	450 mA @ 5.0 V_OUT, 3.6 V_IN - sufficient to power BLE SoCs and RF transceivers directly from battery without intermediate LDO.
Quiescent Current	5 μA typical in PFM mode - minimizes standby drain, extending shelf life and operational duration in remote controllers.
Switching Frequency	500 kHz fixed PWM - allows compact external inductor (e.g., 2.2 μH) and ceramic capacitor selection while avoiding AM band interference.
Bypass Activation Threshold	V_IN ≥ V_OUT − 0.2 V - automatically routes input to output with <100 mΩ R_DS(on), eliminating switching loss during high-V_IN battery phase.
Shutdown Current	2.3 μA typical - supports ultra-low-power system sleep states without external load switches.
UVLO & LBO	Programmable via external resistor divider - enables precise battery end-of-life detection and graceful system shutdown in portable instruments.

Pinout & Package

Package: 10-lead MSOP (3.0 mm × 4.9 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (VIN)	Input supply connection	Accepts 0.8–5.25 V; connects directly to battery anode or power rail; internal UVLO monitoring begins here.
2 (GND)	Power ground reference	Common return for input/output paths and internal circuitry; must be low-impedance connection to minimize noise coupling.
3 (SW)	Switch node	Drives external inductor; carries high di/dt switching current; requires tight layout with minimal loop area to reduce EMI.
4 (FB)	Feedback input	Senses output voltage via resistor divider; sets regulated V_OUT; tolerance ±1.5% over temperature and line/load.
5 (EN)	Enable control input	Active-high logic input; pulls to GND internally when disabled; supports system-level power sequencing and wake-up control.
6 (LBO)	Low battery open-drain output	Asserts low when VIN drops below programmed UVLO threshold; drives microcontroller interrupt or LED indicator.
7 (PGT)	Power good open-drain output	Signals valid regulation (V_OUT within ±7.5%); used for downstream power sequencing or fault reporting.
8 (DIS)	Output discharge enable	When high, activates internal FET to discharge V_OUT capacitor during shutdown - prevents residual voltage hold-up in safety-critical devices.
9 (VDD)	Internal bias supply	Internally regulated ~3.3 V; powers control logic; decoupled by 100 nF ceramic capacitor per datasheet recommendation.
10 (VOUT)	Regulated output	Delivers stable output (e.g., 3.3 V or 5.0 V); bypass mode connects VIN directly to this pin when enabled.

Key Features

Feature	Design Value
Auto Bypass Mode	Eliminates switching loss and reduces IQ to ≤2.3 μA when VIN ≥ VOUT − 0.2 V - extends usable battery capacity by up to 15% in mid-to-high SOC range.
Integrated Soft Start	Controls output ramp rate to limit inrush current during power-on - prevents brownout in weak batteries and avoids triggering host MCU reset.
Internal Compensation	Removes need for external compensation network - reduces BOM count by ≥2 components and simplifies layout validation for Class II medical and wearable designs.
Output Discharge Function	Actively discharges VOUT capacitor through internal 120 Ω FET when DIS = high - ensures safe power-down state required in personal health devices per IEC 62366.
Programmable UVLO/LBO	Configurable via single external resistor - enables precise battery cutoff (e.g., 2.8 V for Li-ion or 1.1 V/cell for alkaline) without firmware dependency.

Applications

Bluetooth® Headsets	Portable Medical Monitors
Use Scenario: Compact wireless audio device powered by single Li-ion cell (3.0–4.2 V), requiring stable 3.3 V for BLE radio and codec. IC Role / Device Role / Timing Role: Synchronous boost regulator with auto-bypass - maintains regulation during full battery range while minimizing no-load current. Use Value: 96% efficiency at 200 mA and 5 μA quiescent current extend talk time >30% vs. legacy charge-pump solutions.	Use Scenario: Handheld blood glucose meter using two alkaline AA cells (1.0–3.2 V total), powering LCD, sensor interface, and MCU. IC Role / Device Role / Timing Role: Step-up regulator with programmable LBO - triggers low-battery alert before measurement inaccuracy occurs. Use Value: Auto-bypass mode sustains 3.3 V output down to 2.2 V input, preserving accuracy across 90% of battery discharge cycle.
Smart Remote Controllers	IoT Sensor Nodes
Use Scenario: Infrared/RF remote with coin-cell or AAA battery, needing 3.0 V for MCU and IR LED driver. IC Role / Device Role / Timing Role: Low-IQ boost converter with output discharge - ensures clean power-down and eliminates phantom load during storage. Use Value: 2.3 μA shutdown current enables >1-year shelf life; DIS pin enables safe reset before firmware update.	Use Scenario: Battery-powered environmental sensor node (temp/humidity/pressure) transmitting via sub-GHz RF, operating intermittently. IC Role / Device Role / Timing Role: High-efficiency boost regulator with soft start - prevents supply sag during RF transmit burst (peak 150 mA). Use Value: 500 kHz fixed-frequency operation allows predictable EMI filtering; 450 mA capability supports concurrent sensor + RF operation.

Bluetooth® Headsets

Portable Medical Monitors

Use Scenario: Compact wireless audio device powered by single Li-ion cell (3.0–4.2 V), requiring stable 3.3 V for BLE radio and codec.

IC Role / Device Role / Timing Role: Synchronous boost regulator with auto-bypass - maintains regulation during full battery range while minimizing no-load current.

Use Value: 96% efficiency at 200 mA and 5 μA quiescent current extend talk time >30% vs. legacy charge-pump solutions.

Use Scenario: Handheld blood glucose meter using two alkaline AA cells (1.0–3.2 V total), powering LCD, sensor interface, and MCU.

IC Role / Device Role / Timing Role: Step-up regulator with programmable LBO - triggers low-battery alert before measurement inaccuracy occurs.

Use Value: Auto-bypass mode sustains 3.3 V output down to 2.2 V input, preserving accuracy across 90% of battery discharge cycle.

Smart Remote Controllers

IoT Sensor Nodes

Use Scenario: Infrared/RF remote with coin-cell or AAA battery, needing 3.0 V for MCU and IR LED driver.

IC Role / Device Role / Timing Role: Low-IQ boost converter with output discharge - ensures clean power-down and eliminates phantom load during storage.

Use Value: 2.3 μA shutdown current enables >1-year shelf life; DIS pin enables safe reset before firmware update.

Use Scenario: Battery-powered environmental sensor node (temp/humidity/pressure) transmitting via sub-GHz RF, operating intermittently.

IC Role / Device Role / Timing Role: High-efficiency boost regulator with soft start - prevents supply sag during RF transmit burst (peak 150 mA).

Use Value: 500 kHz fixed-frequency operation allows predictable EMI filtering; 450 mA capability supports concurrent sensor + RF operation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar boost converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Texas Instruments TPS61291DRVR	Fixed 1.2 MHz switching; 3.5 μA IQ; no auto-bypass; requires external compensation.	Lacks input-to-output bypass; less efficient at high VIN/VOUT ratios; better suited for space-constrained designs needing higher frequency.	Select when board area is critical and battery voltage stays well below VOUT - e.g., 1.5 V → 3.3 V only.
Analog Devices ADP5070ACPZ-R7	2.4 MHz switching; dual-output; 2.5 μA IQ; no bypass mode; external feedback resistors required.	Designed for dual-rail systems (e.g., ±5 V); higher cost and complexity; unsuitable for single-output, battery-tracking use cases.	Choose only if generating both positive and negative rails is required - not a functional substitute for MCP16412-I/UN's auto-bypass capability.

Compared with TPS61291DRVR and ADP5070ACPZ-R7, the MCP16412-I/UN uniquely combines auto-bypass operation, output discharge, and internal compensation - delivering superior battery utilization and simplified design for single-output, wide-input-range portable electronics.

Availability

MCP16412-I/UN is available at Aetrix Electronics and suitable for Bluetooth headsets, portable medical monitors, and smart remote controllers requiring stable component supply across multi-year production cycles.

Supply support for MCP16412-I/UN 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 global manufacturing and quality certifications including ISO 9001 and AEC-Q200.

The MCP1641X family was developed specifically for battery-powered portable electronics requiring adaptive efficiency across varying cell voltages - emphasizing low IQ, auto-bypass, and seamless integration with MCUs like PIC10F320 in total-system charging solutions.

FAQ

What is the minimum input voltage required for MCP16412-I/UN to start switching?

The MCP16412-I/UN requires a minimum input voltage of 0.8 V after startup to maintain regulation. However, its actual startup voltage is higher - typically 0.95 V - due to internal bias requirements. Below this threshold, the device remains in shutdown and cannot initiate switching, even with external capacitive hold-up.

Does MCP16412-I/UN support adjustable output voltage?

Yes, MCP16412-I/UN supports adjustable output voltage via an external resistor divider on the FB pin. The feedback reference voltage is 0.6 V, and output can be set from 2.0 V to 5.25 V using standard 1% resistors. Fixed-output versions (e.g., MCP16412-330) are also available but the -I/UN variant is fully adjustable.

How does the auto-bypass mode function in MCP16412-I/UN?

The auto-bypass mode in MCP16412-I/UN engages when VIN ≥ VOUT − 0.2 V, connecting input directly to output through an internal low-RDS(on) switch. This disables switching, reduces IQ to ≤2.3 μA, and eliminates inductor losses - significantly improving efficiency during high-SOC battery operation where VIN approaches VOUT.

Can MCP16412-I/UN drive a 500 mA load at 5.0 V output?

No, MCP16412-I/UN is rated for up to 450 mA at 5.0 V output with 3.6 V input per Microchip's DS20006444A. Attempting 500 mA may cause thermal shutdown or output droop. For higher current, consider the MCP16414 (600 mA) or evaluate thermal derating with 20°C/W PCB copper area.

Is the DIS pin on MCP16412-I/UN mandatory for proper operation?

No, the DIS pin on MCP16412-I/UN is optional. When left unconnected or pulled low, output discharge is disabled. It only activates when driven high. Use is recommended in safety-critical or regulatory-compliant applications (e.g., IEC 62366) where rapid VOUT discharge after shutdown is required.

MCP16412-I/UN Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Packaging:: Tube

Product Status:: Active

Function:: Step-Up

Output Configuration:: Positive

Topology:: Boost

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 0.82V

Voltage - Input (Max):: 5.25V

Voltage - Output (Min/Fixed):: 1.8V

Voltage - Output (Max):: 5.25V

Current - Output:: 600mA

Frequency - Switching:: 500kHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-MSOP

MCP16412-I/UN FAQ

1.How can I place an order for MCP16412-I/UN through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP16412-I/UN 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 MCP16412-I/UN reliable?

The price and inventory of MCP16412-I/UN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP16412-I/UN is usually 5 days.

3.What payment methods are accepted for MCP16412-I/UN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16412-I/UN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCP16412-I/UN?

MCP16412-I/UN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP16412-I/UN 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 MCP16412-I/UN?

For technical support, including MCP16412-I/UN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16412-I/UN requirements.

6.How does Aetrix verify that MCP16412-I/UN is sourced from the original manufacturer or authorized distributors?

All MCP16412-I/UN 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 MCP16412-I/UN meets industry standards.

7.What is the process for return or replacement of MCP16412-I/UN?

All MCP16412-I/UN units undergo pre-shipment inspection (PSI). If there is an issue with MCP16412-I/UN, 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 MCP16412-I/UN part is unused and in its original packaging.

Return procedure for MCP16412-I/UN:

1.Submit a request within 90 days.

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

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