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Microchip Technology MCP16418T-I/UN
- Part No.:
- MCP16418T-I/UN
- Manufacturer:
- Microchip Technology
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP16418T-I/UN.pdf
- Description:
- IC REG BOOST ADJ 600MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,382
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Product details
Overview
MCP16418T-I/UN from Microchip Technology is a synchronous boost DC-DC converter with auto-bypass functionality, designed for single-cell Li-ion/Li-Polymer or two-cell alkaline/NiMH battery-powered systems. It delivers up to 450 mA output current at 5.0 V output from 3.6 V input, features 5 μA quiescent current in PFM mode, 500 kHz fixed-frequency PWM operation, and integrated UVLO with low-battery output signaling - enabling long runtime in Bluetooth headsets and remote controllers.
For engineers reviewing the MCP16418T-I/UN datasheet, MCP16418T-I/UN pinout, MCP16418T-I/UN application, or MCP16418T-I/UN equivalent, key selection criteria include its automatic input-to-output bypass mode, 500 kHz switching frequency, 10-lead MSOP package, shutdown current of 2.3 μA, and compatibility with low-voltage startup (0.8 V post-startup).
Technical Context
The MCP16418T-I/UN implements a synchronous rectified boost topology with internal compensation and selectable fixed-frequency PWM control (500 kHz), eliminating external loop compensation components. Its auto-bypass function engages when input voltage approaches or exceeds regulated output voltage, reducing conduction losses and improving efficiency above ~4.5 V input for 5.0 V output configurations.
It supports programmable undervoltage lockout (UVLO) and low-battery output (LBO) assertion, with shutdown states including output discharge disabled and input-to-output bypass enabled - distinguishing it from MCP16411–17 variants that offer output discharge or automatic PFM/PWM mode.
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-cell Li-ion (3.0–4.2 V) and two-cell alkaline (1.0–3.2 V) |
| Output Current Capability | 450 mA @ 5.0 VOUT, 3.6 VIN - sufficient to power BLE SoCs and RF transceivers without external LDO post-regulation |
| Quiescent Current | 5 μA typical in PFM mode - extends shelf life and standby time in always-on IoT sensors |
| Switching Frequency | 500 kHz fixed PWM - allows compact 1.0–2.2 μH inductor selection and predictable EMI profile |
| Bypass Mode Activation | Automatic input-to-output conduction when VIN ≥ VOUT − 100 mV - eliminates switching loss and improves efficiency >96% near battery full charge |
| Shutdown Current | 2.3 μA typical - critical for ultra-low-power wake-on-event system architectures |
| Package | 10-lead MSOP (3.0 × 4.9 mm) - surface-mount compatible with standard reflow profiles and IPC-7351B land pattern |
Pinout & Package
Package: 10-lead MSOP (MCP16418T-I/UN is the tape-and-reel version of the MSOP-10 variant; no TDFN variant uses -I/UN suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply connection | Accepts 0.8–5.25 V; internal UVLO threshold set by resistor divider on EN pin |
| GND | Power and signal reference | Common return for input, output, and control circuitry; requires low-impedance PCB plane |
| SW | Switch node | Connects to external inductor and catch diode (internal synchronous FET); 500 kHz switching node |
| FB | Feedback input | Resistor-divider input for output voltage regulation; sets VOUT = 0.6 V × (1 + R1/R2) |
| EN | Enable with UVLO programming | Active-high enable; UVLO threshold configured via external resistor to GND |
| LBO | Low-battery open-drain output | Asserts low when VIN drops below programmed UVLO threshold; sinks ≤10 μA |
| PGT | Power-good indicator | Open-drain output asserted high when VOUT is within ±5% regulation window |
| SS | Soft-start timing capacitor | Connects to GND; sets ramp rate of output voltage during startup to limit inrush |
| VOUT | Regulated output | Delivers regulated voltage to load; connects to output capacitor and bypass path during auto-bypass mode |
| NC | No connect | Pin 10 is internally unused; must remain unconnected per datasheet DS20006444A |
Key Features
| Feature | Design Value |
|---|---|
| Auto input-to-output bypass | Engages when VIN ≥ VOUT − 100 mV, eliminating switching loss and enabling >96% efficiency at high battery SOC |
| Fixed 500 kHz PWM mode | Guarantees consistent switching frequency for EMI filtering and inductor sizing - unlike PFM variants (MCP16411/3/5/7) |
| Programmable UVLO & LBO | Single resistor on EN pin sets both turn-on threshold and LBO assertion point, reducing component count vs dual-threshold solutions |
| Soft-start with external capacitor | SS pin controls output ramp rate to prevent inrush into large output caps or downstream LDOs in portable instruments |
| 2.3 μA shutdown current | Enables true system-level deep-sleep modes where only real-time clock or wake logic remains active |
Applications
| Bluetooth® Headsets | Remote Controllers |
|---|---|
Use Scenario: Compact wireless audio device powered by single-cell Li-Po battery with peak 3.3 V/150 mA RF + codec load. IC Role / Device Role / Timing Role: Primary voltage regulator supplying stable 3.3 V to Bluetooth SoC and audio DAC; auto-bypass extends usable battery range above 3.6 V. Use Value: Eliminates need for discrete bypass FET and reduces BOM count by one active component while maintaining <1% output ripple during transition. | Use Scenario: Two-cell alkaline remote with IR LED burst drive (200 mA pulses) and sub-1 μA sleep current requirement. IC Role / Device Role / Timing Role: Boost converter delivering 3.0 V to microcontroller and IR driver; soft-start prevents brownout during cold start at 1.3 V cell voltage. Use Value: 5 μA quiescent current and 2.3 μA shutdown current directly extend shelf life beyond 2 years without battery removal. |
| Portable Medical Sensors | IoT Edge Nodes |
Use Scenario: Single-use glucose monitor using coin-cell battery and low-power ADC + BLE transmission bursts. IC Role / Device Role / Timing Role: Power management IC providing regulated 3.3 V to sensor front-end and BLE radio; LBO pin signals end-of-life to firmware. Use Value: Integrated LBO eliminates separate voltage supervisor IC, saving 1.5 mm² PCB area in space-constrained disposable housing. | Use Scenario: Battery-powered environmental sensor node transmitting temperature/humidity data every 5 minutes via LoRaWAN. IC Role / Device Role / Timing Role: Synchronous boost regulator powering MCU, sensor, and RF transceiver; auto-bypass sustains >94% efficiency across 3.0–4.2 V Li-ion range. Use Value: Reduces average system power by 8–12% over full battery discharge cycle compared to non-bypass boost converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP16414T-I/MS | Same 500 kHz PWM mode and MSOP-10 package, but lacks LBO pin and uses different EN/UVLO configuration (no external resistor support) | Targeted at cost-sensitive remotes without battery monitoring; no firmware-accessible low-battery flag | Select MCP16414T-I/MS only if LBO signaling is unnecessary and UVLO threshold can be fixed internally |
| TPS61291DRVR | Lower IQ (350 nA shutdown, 400 nA operating), but no auto-bypass, fixed 5.0 V output, and 1.2–5.5 V input range | Suited for ultra-low-power always-on sensors needing fixed output; cannot adapt to varying battery voltage like MCP16418T-I/UN | Choose TPS61291DRVR when minimum operating current dominates design priority and output voltage is fixed |
Compared with MCP16414T-I/MS and TPS61291DRVR, the MCP16418T-I/UN uniquely combines programmable UVLO/LBO, auto-bypass, and 500 kHz PWM in a single MSOP-10 package - making it optimal for battery-powered devices requiring both runtime extension and intelligent battery status reporting.
Availability
MCP16418T-I/UN is available at Aetrix Electronics and suitable for Bluetooth headsets, remote controllers, and portable medical sensors requiring stable component supply across multi-year production cycles.
Supply support for MCP16418T-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 for embedded control applications.
The MCP1641X family was developed to address battery utilization inefficiency in portable electronics, specifically targeting applications where input voltage overlaps regulated output - enabling seamless transition between boost and bypass operation.
FAQ
What is the minimum input voltage required for MCP16418T-I/UN to start switching?
The MCP16418T-I/UN requires a minimum input voltage of 0.8 V after startup to maintain regulation. However, startup itself requires higher voltage: the datasheet specifies guaranteed startup at 1.8 V with light load. Below 1.8 V, startup is not assured and depends on output capacitance, load, and ambient temperature. The MCP16418T-I/UN does not operate in boost mode below 0.8 V, but may remain latched in bypass if previously enabled.
Does MCP16418T-I/UN support adjustable output voltage, and how is it set?
Yes, MCP16418T-I/UN supports adjustable output voltage via an external resistor divider on the FB pin. The feedback reference is 0.6 V, so VOUT = 0.6 V × (1 + R1/R2), where R1 connects between VOUT and FB, and R2 connects between FB and GND. Standard values (e.g., 301 kΩ and 100 kΩ) yield 3.3 V. The MCP16418T-I/UN does not support dynamic voltage scaling or I²C programming - adjustment is static during design.
How does the auto-bypass function work in MCP16418T-I/UN, and when does it activate?
The MCP16418T-I/UN activates auto-bypass when input voltage rises to within ~100 mV of the regulated output voltage (e.g., VIN ≥ 4.9 V for 5.0 V output). During bypass, internal switches connect VIN directly to VOUT, disabling the boost switcher and eliminating switching losses. This occurs automatically without control signals, and the MCP16418T-I/UN maintains regulation and PGT assertion throughout the transition.
What is the purpose of the LBO pin on MCP16418T-I/UN, and how is it configured?
The LBO pin on MCP16418T-I/UN is an open-drain output that asserts low when input voltage falls below the UVLO threshold. That threshold is set by a resistor from EN to GND - same resistor defines both enable turn-on and LBO trip point. The MCP16418T-I/UN does not provide hysteresis or independent LBO threshold adjustment; LBO follows UVLO precisely, enabling simple battery fuel-gauge signaling in firmware.
Can MCP16418T-I/UN be used with a 2.5 V output, and what output current is supported at that level?
Yes, MCP16418T-I/UN supports 2.5 V output using appropriate FB resistor values. At 2.5 V output and 1.5 V input, the datasheet guarantees >200 mA output current. Performance scales with input-output differential: lower VOUT increases available current due to reduced power conversion demand. The MCP16418T-I/UN maintains 500 kHz PWM operation and auto-bypass down to 2.5 V, provided the feedback network is correctly scaled and stability is verified per layout guidelines.
MCP16418T-I/UN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
MCP16418T-I/UN FAQ
1.How can I place an order for MCP16418T-I/UN through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16418T-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 MCP16418T-I/UN reliable?
The price and inventory of MCP16418T-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 MCP16418T-I/UN is usually 5 days.
3.What payment methods are accepted for MCP16418T-I/UN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16418T-I/UN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16418T-I/UN?
MCP16418T-I/UN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16418T-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 MCP16418T-I/UN?
For technical support, including MCP16418T-I/UN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16418T-I/UN requirements.
6.How does Aetrix verify that MCP16418T-I/UN is sourced from the original manufacturer or authorized distributors?
All MCP16418T-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 MCP16418T-I/UN meets industry standards.
7.What is the process for return or replacement of MCP16418T-I/UN?
All MCP16418T-I/UN units undergo pre-shipment inspection (PSI). If there is an issue with MCP16418T-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 MCP16418T-I/UN part is unused and in its original packaging.
Return procedure for MCP16418T-I/UN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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