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Microchip Technology MCP1640CT-I/MC
- Part No.:
- MCP1640CT-I/MC
- Manufacturer:
- Microchip Technology
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
MCP1640CT-I/MC.pdf
- Description:
- IC REG BOOST ADJ 350MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,365
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Product details
Overview
MCP1640CT-I/MC from Microchip Technology is a synchronous step-up DC-DC converter optimized for ultra-low-voltage battery-powered systems. It delivers up to 350 mA output at 5.0V from 3.3V input, starts reliably at 0.65V (typical), operates down to 0.35V input post-startup, and integrates both N-Channel and P-Channel MOSFETs in a 6-pin SOT-23 package for compact portable power rails.
For engineers reviewing the MCP1640CT-I/MC datasheet, MCP1640CT-I/MC pinout, MCP1640CT-I/MC application, or MCP1640CT-I/MC equivalent, this device serves as a high-efficiency, low-quiescent-current boost regulator for single-cell Li-ion, alkaline, or NiMH systems requiring stable 2.0–5.5V outputs with true load disconnect capability.
Technical Context
The MCP1640CT-I/MC implements automatic PFM/PWM mode switching to maintain >90% efficiency across light-to-moderate loads while minimizing output ripple variation. Its internal slope-compensated peak current control uses adaptive compensation tied to VIN and VOUT, enabling stable operation without external components.
It features integrated soft-start (750 µs typical), overtemperature shutdown (150°C trip, 10°C hysteresis), and lossless current sensing with 850 mA typical peak switch current limit. The device supports adjustable output voltage via external resistor divider referenced to a precise 1.21 V feedback threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Start-Up Voltage | 0.65 V typical - enables operation from deeply discharged single-cell batteries without external bias |
| Operating Input Range | 0.35 V to ≤ VOUT (max 5.5 V) - supports full discharge cycle of alkaline/NiMH/Li-ion cells |
| Output Voltage Range | 2.0 V to 5.5 V - set externally via resistor divider; regulated by 1.21 V ±2.5% internal reference |
| Peak Switch Current Limit | 850 mA typical - determines maximum deliverable output current under given VIN/VOUT conditions |
| Quiescent Current (PFM) | 19 µA typical - enables multi-year battery life in always-on sensor or medical devices |
| Switching Frequency | 500 kHz nominal - fixed PWM frequency ensures predictable EMI profile and small passive sizing |
| Shutdown Current | <1 µA - isolates input from output during disable, preserving battery charge in standby |
Pinout & Package
Package: 6-Lead SOT-23 (Moisture Sensitivity Level 1, Pb-free, RoHS compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Supply Input | Connects to battery or low-voltage source; decoupled with ≥4.7 µF capacitor to PGND |
| GND | Ground Reference | Common return for input cap, output cap, and internal bias; requires short PCB trace to minimize noise |
| VOUT | Regulated Output Power | Delivers boosted voltage to load; connects to output capacitor and FB divider top resistor |
| SW | Switch Node | High-current node connecting inductor to internal N-Channel drain and P-Channel source; carries up to 800 mA peak |
| EN | Enable Control Input | Logic-level input: >90% VIN enables regulation; <20% VIN disables with true disconnect and <1 µA draw |
| VFB | Feedback Voltage Sense | Monitors output via resistor divider; regulates output by comparing to 1.21 V internal reference |
Key Features
| Feature | Design Value |
|---|---|
| True Load Disconnect | EN = GND removes all DC paths between VIN and VOUT, preventing battery drain while holding output voltage on COUT |
| Integrated Synchronous Rectifier | Eliminates external Schottky diode; reduces conduction losses and improves efficiency at medium-to-high loads |
| Internal Compensation | Removes need for external compensation network - simplifies layout and reduces BOM count |
| Low-Noise Anti-Ringing Control | Damps switch-node oscillations in discontinuous conduction mode, lowering radiated EMI |
| Inrush Current Limiting & Soft Start | 750 µs typical soft-start time prevents output overshoot and limits inrush into output capacitors |
Applications
| Wireless Sensor Nodes | Portable Medical Devices |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensors transmitting intermittently via BLE or LoRaWAN. IC Role / Device Role / Timing Role: Step-up regulator providing stable 3.3V rail from aging 1.2–1.5V alkaline cells. Use Value: 0.65V start-up and 19 µA quiescent current extend field deployment to >5 years on two AA cells. |
Use Scenario: Handheld glucose meters or pulse oximeters using single AAA alkaline or coin cell. IC Role / Device Role / Timing Role: Generates 3.3V logic supply and 5.0V analog front-end bias from 1.0–1.6V input. Use Value: True disconnect mode eliminates standby leakage, critical for FDA-mandated shelf-life requirements. |
| Bluetooth Headsets | +3.3V to +5.0V Distributed Power |
Use Scenario: Compact audio accessories powered by single Li-ion cell (2.8–4.2V). IC Role / Device Role / Timing Role: Boosts battery voltage to 5.0V for USB charging port or codec bias. Use Value: 96% peak efficiency and 500 kHz fixed frequency enable small 4.7 µH inductor and minimal filtering. |
Use Scenario: Industrial control modules requiring isolated 5.0V rail from existing 3.3V system bus. IC Role / Device Role / Timing Role: Local point-of-load boost converter replacing inefficient linear regulators. Use Value: Adjustable output (2.0–5.5V) and 350 mA capability support diverse downstream ICs without redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS61200DRCT | Fixed 3.3V/5.0V outputs only; no adjustable VOUT; 0.3V min VIN; 1.2A peak switch current | Lacks true disconnect; uses external diode in bypass mode; higher IQ (55 µA) | Choose when fixed output and higher current outweigh need for ultra-low-VIN start-up and disconnect |
| Analog Devices ADP5070ARMZ-R7 | Higher VIN range (2.85–15V); dual-output; 1.2MHz switching; no sub-1V start-up capability | Designed for wide-input industrial supplies, not primary battery systems | Prefer for multi-rail systems with stable input >2.85V where efficiency at high VIN matters more than cold-start performance |
Compared with TPS61200DRCT and ADP5070ARMZ-R7, the MCP1640CT-I/MC uniquely combines sub-0.7V start-up, true load disconnect, and adjustable 2.0–5.5V output in a 6-pin SOT-23 - making it irreplaceable for space-constrained, ultra-low-power battery designs where every µA and mV counts.
Availability
MCP1640CT-I/MC is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical devices, Bluetooth headsets, and distributed power conversion requiring stable component supply with long-term lifecycle assurance.
Supply support for MCP1640CT-I/MC 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 manufacturer specializing in microcontrollers, analog, interface, and power management ICs for embedded and industrial applications.
The MCP1640/B/C/D family was designed specifically for ultra-low-voltage battery-powered systems - delivering high efficiency, minimal quiescent current, and robust start-up behavior across alkaline, NiMH, and Li-ion chemistries.
FAQ
What is the minimum input voltage required for the MCP1640CT-I/MC to start regulation?
The MCP1640CT-I/MC starts regulation at 0.65 V typical when delivering 1 mA into a 3.3 V output load. This value is confirmed across production lots per DS20002234D-page 3, Table 1-1. Below this threshold, the device remains inactive; above it, internal start-up logic engages the P-Channel rectifier to pre-charge the output capacitor before initiating switching.
Does the MCP1640CT-I/MC support true load disconnect during shutdown?
Yes, the MCP1640CT-I/MC implements true load disconnect: when EN is pulled low, both the N-Channel and P-Channel switches turn off, removing all DC conduction paths between VIN and VOUT. This is explicitly documented in DS20002234D-page 11 (Section 4.1.3) and verified in the "True Disconnect" column of Table 4-1 for MCP1640 and MCP1640B variants.
What is the switching frequency of the MCP1640CT-I/MC and how stable is it over temperature?
The MCP1640CT-I/MC operates at a nominal 500 kHz switching frequency, with measured variation from 425 kHz to 575 kHz across -40°C to +85°C ambient (DS20002234D-page 4, Table 1-1). Figure 2-11 confirms frequency drift of <±2% over temperature, supporting consistent EMI filtering and inductor selection.
Can the output voltage of the MCP1640CT-I/MC be adjusted, and what is the supported range?
Yes, the MCP1640CT-I/MC output voltage is adjustable using an external resistor divider connected to VFB. The supported range is 2.0 V to 5.5 V, constrained such that VOUT must be ≥ VIN (DS20002234D-page 3, Table 1-1). Regulation accuracy is ±3% over line/load/temperature, referenced to a 1.21 V ±2.5% internal feedback threshold.
What thermal protection features does the MCP1640CT-I/MC include?
The MCP1640CT-I/MC includes overtemperature protection with a 150°C typical shutdown threshold and 10°C hysteresis (DS20002234D-page 4, Table 1-1). When junction temperature exceeds 150°C, the device halts switching and resets soft-start upon cooling to 140°C. This protects against sustained overload or poor PCB thermal design without requiring external circuitry.
MCP1640CT-I/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- 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):
- 0.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 350mA
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x3)
MCP1640CT-I/MC FAQ
1.How can I place an order for MCP1640CT-I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1640CT-I/MC 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 MCP1640CT-I/MC reliable?
The price and inventory of MCP1640CT-I/MC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP1640CT-I/MC is usually 5 days.
3.What payment methods are accepted for MCP1640CT-I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1640CT-I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1640CT-I/MC?
MCP1640CT-I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1640CT-I/MC 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 MCP1640CT-I/MC?
For technical support, including MCP1640CT-I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1640CT-I/MC requirements.
6.How does Aetrix verify that MCP1640CT-I/MC is sourced from the original manufacturer or authorized distributors?
All MCP1640CT-I/MC 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 MCP1640CT-I/MC meets industry standards.
7.What is the process for return or replacement of MCP1640CT-I/MC?
All MCP1640CT-I/MC units undergo pre-shipment inspection (PSI). If there is an issue with MCP1640CT-I/MC, 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 MCP1640CT-I/MC part is unused and in its original packaging.
Return procedure for MCP1640CT-I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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