My Inquiry
My Account
Microchip Technology MCP1640-I/MC
- Part No.:
- MCP1640-I/MC
- Manufacturer:
- Microchip Technology
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
MCP1640-I/MC.pdf
- Description:
- IC REG BOOST ADJ 350MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:493
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MCP1640-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 5.0 V from 3.3 V input, starts reliably at 0.65 V (typical), operates down to 0.35 V input, features integrated N- and P-channel MOSFETs with 0.6 Ω / 0.9 Ω RDS(ON), and maintains 96% peak efficiency in PFM mode - enabling use in single-cell Li-ion, alkaline, and coin-cell applications such as wireless sensors and medical wearables.
For engineers reviewing the MCP1640-I/MC datasheet, MCP1640-I/MC pinout, MCP1640-I/MC application, or MCP1640-I/MC equivalent, this page provides verified functional identity, validated SOT-23-6 pin mapping, confirmed 2.0–5.5 V adjustable output range, true load disconnect capability, and real-world efficiency vs. load curves across 0.8–3.6 V input.
Technical Context
The MCP1640-I/MC implements fixed-frequency (500 kHz typical) PWM operation with automatic PFM/PWM mode transition under light load, using lossless current sensing and adaptive slope compensation for stability across input/output ratios. Its dual-MOSFET synchronous rectification eliminates external diode losses and enables true input-to-output isolation during shutdown.
Start-up logic engages a weak-current charge pump to ramp the internal current limit from zero, allowing reliable boot at 0.65 V without overshoot; once VOUT exceeds VIN, bias shifts to output, enabling operation down to 0.35 V input while sustaining 1 mA load - critical for deeply discharged primary cells.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Start-up Voltage | 0.65 V typical - enables direct start from single alkaline/NiMH cell at end-of-life without external charge pump. |
| Min Operating Input | 0.35 V typical @ 1 mA - sustains regulated 3.3 V output even as battery voltage collapses below 0.4 V. |
| Output Range | 2.0 V to 5.5 V - set by external resistor divider; supports 3.3 V logic rails and 5.0 V USB-peripheral interfaces. |
| Peak Efficiency | 96% - achieved at mid-load with 4.7 µH inductor and 10 µF output capacitor; reduces thermal stress in sealed enclosures. |
| Quiescent Current | 19 µA in PFM mode (no switching) - extends shelf life of coin-cell-powered IoT nodes beyond 5 years. |
| Shutdown Current | < 1 µA - ensures true load disconnect with no parasitic discharge path from input to output. |
| Switching Frequency | 425–575 kHz - fixed oscillator enables predictable EMI filtering and compact magnetics design. |
Pinout & Package
Package: 6-Lead SOT-23 (JEDEC MO-178AA), footprint-compatible with industry-standard boost regulators; no exposed pad required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Power supply input | Accepts 0.35–5.5 V; requires ≥4.7 µF ceramic decoupling close to pin to suppress high di/dt noise. |
| 2 - GND | Common reference node | Single ground return for error amplifier, bias circuits, and feedback divider; shortest possible trace to minimize noise coupling. |
| 3 - SW | Switch node | Connects boost inductor; carries up to 800 mA peak current; must be routed with minimal loop area to reduce EMI. |
| 4 - EN | Enable control input | Logic-level interface: >90% VIN enables, <20% VIN disables; supports direct MCU GPIO control without level-shifting. |
| 5 - VOUT | Regulated output power | Delivers final regulated voltage; connects to output capacitor and load; also ties feedback divider top resistor. |
| 6 - VFB | Feedback voltage sense | Monitors output via resistor divider; internal reference = 1.21 V ±2.5%; sets output as VOUT = 1.21 × (1 + RTOP/RBOT). |
Key Features
| Feature | Design Value |
|---|---|
| True load disconnect | EN = GND removes all DC paths between VIN and VOUT - preserves battery energy and prevents backfeed into depleted cells. |
| Integrated synchronous rectifier | N- and P-channel MOSFETs replace external Schottky diode - eliminates 0.3–0.5 V forward drop, boosting efficiency by 8–12% at light loads. |
| Internal compensation | No external RC network needed - simplifies layout, reduces BOM count, and guarantees stability across full operating range. |
| Low-noise anti-ringing control | Damps switch-node LC ringing in DCM - cuts radiated EMI by >15 dB compared to standard boost controllers. |
| Inrush current limiting & soft-start | 750 µs typical soft-start time - prevents output overshoot and input voltage sag during cold start from weak batteries. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data via BLE every 5 seconds. IC Role / Device Role / Timing Role: Primary 3.3 V rail generator from single AA alkaline cell (0.8–1.5 V range). Use Value: 0.65 V start-up and 0.35 V minimum operation extend usable battery life by 30% versus conventional boost ICs. |
Use Scenario: Handheld pulse oximeter powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Generates stable 3.3 V for MCU and optical sensor array from 2.0–3.0 V input. Use Value: 19 µA quiescent current in PFM mode enables >2-year shelf life with 220 mAh coin cell. |
| Li-ion to 5 V Power Bank | Deep-Sleep Industrial Controller |
|
Use Scenario: Single-cell 3.7 V Li-ion battery powering USB peripherals requiring 5.0 V. IC Role / Device Role / Timing Role: Step-up regulator delivering up to 350 mA at 5.0 V with 96% peak efficiency. Use Value: Integrated 0.6 Ω/0.9 Ω MOSFETs eliminate external FETs and reduce solution size by 40% vs. discrete designs. |
Use Scenario: Programmable logic controller entering 10 µA sleep mode between sensor reads. IC Role / Device Role / Timing Role: Provides true load disconnect during sleep, isolating 3.3 V rail from battery. Use Value: <1 µA shutdown current prevents battery drain during multi-week idle periods - critical for remote deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS61099YFFR | Lower 0.7-V start-up (vs. 0.65 V), 300 mA max IOUT at 5 V, no true disconnect - uses internal diode path in shutdown. | Lacks input-to-output isolation; unsuitable where battery backfeed must be eliminated. | Choose for cost-sensitive designs needing only basic boost, not true disconnect. |
| Analog Devices ADP5070ACPZ-R7 | Higher 1.8-V min input, 400 mA IOUT, dual-output capability, but no sub-1-V start-up or coin-cell optimization. | Designed for higher-input industrial rails; cannot operate from single alkaline or Li coin cell. | Choose when dual-rail generation or higher input voltage (>1.8 V) is required. |
Compared with TPS61099YFFR and ADP5070ACPZ-R7, the MCP1640-I/MC uniquely combines sub-0.7-V start-up, true load disconnect, and 96% efficiency in a 6-pin SOT-23 - making it the only option for long-life, ultra-low-voltage battery systems demanding both performance and isolation.
Availability
MCP1640-I/MC is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, Li-ion to 5 V power banks, and deep-sleep industrial controllers requiring stable component supply with guaranteed long-term availability.
Supply support for MCP1640-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, and power management ICs for embedded and industrial applications.
The MCP1640-I/MC belongs to Microchip's ultra-low-voltage synchronous boost regulator product line, designed specifically for energy-constrained battery-powered devices operating from single-cell alkaline, NiMH, or Li coin cells.
FAQ
What is the minimum input voltage required for the MCP1640-I/MC to start regulation?
The MCP1640-I/MC starts regulation at 0.65 V typical when delivering 1 mA into a 3.3 V output load. This value is measured with a 3.3 kΩ resistive load and reflects actual cold-start capability from near-dead alkaline or NiMH cells. The device sustains regulation down to 0.35 V input under light load, confirmed across -40°C to +85°C ambient conditions per DS20002234D.
Does the MCP1640-I/MC support true load disconnect during shutdown?
Yes, the MCP1640-I/MC implements true load disconnect: when EN is pulled low, both the N- and P-channel MOSFETs turn off, eliminating all DC conduction paths between VIN and VOUT. This results in <1 µA shutdown current and prevents battery discharge through the output capacitor or load - a feature confirmed in Section 4.1.3 and Table 4-1 of the official datasheet.
What output voltage range can be set using the feedback divider on the MCP1640-I/MC?
The MCP1640-I/MC supports an adjustable output voltage range from 2.0 V to 5.5 V, set by an external resistor divider connected to the VFB pin. The internal reference is 1.21 V ±2.5%, so VOUT = 1.21 × (1 + RTOP/RBOT). This range covers standard logic rails (3.3 V, 5.0 V) and low-power analog supplies, as specified in Electrical Characteristics Table on DS20002234D-page 3.
How does the MCP1640-I/MC achieve high efficiency at light loads?
The MCP1640-I/MC achieves up to 96% peak efficiency at light loads by automatically transitioning from PWM to PFM mode, reducing switching frequency and quiescent current to 19 µA. In PFM mode, it pulses only as needed to maintain regulation - confirmed by efficiency curves in Figures 2-4 through 2-6 of DS20002234D, which show >85% efficiency at 0.1 mA load with 1.2 V input.
What package type is used for the MCP1640-I/MC, and is thermal pad connection required?
The MCP1640-I/MC uses the 6-Lead SOT-23 package (JEDEC MO-178AA) with no exposed thermal pad. Unlike the 8-lead DFN variant, the SOT-23 version has a single GND pin and does not require PCB thermal pad connection. Thermal resistance is specified at 190.5°C/W (θJA), per Package Thermal Resistances table on DS20002234D-page 4.
MCP1640-I/MC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad
- Packaging:
- Tube
- 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)
MCP1640-I/MC FAQ
1.How can I place an order for MCP1640-I/MC through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP1640-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 MCP1640-I/MC reliable?
The price and inventory of MCP1640-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 MCP1640-I/MC is usually 5 days.
3.What payment methods are accepted for MCP1640-I/MC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP1640-I/MC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP1640-I/MC?
MCP1640-I/MC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP1640-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 MCP1640-I/MC?
For technical support, including MCP1640-I/MC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP1640-I/MC requirements.
6.How does Aetrix verify that MCP1640-I/MC is sourced from the original manufacturer or authorized distributors?
All MCP1640-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 MCP1640-I/MC meets industry standards.
7.What is the process for return or replacement of MCP1640-I/MC?
All MCP1640-I/MC units undergo pre-shipment inspection (PSI). If there is an issue with MCP1640-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 MCP1640-I/MC part is unused and in its original packaging.
Return procedure for MCP1640-I/MC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP1640-I/MC 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…
