MCP1640-I/MC Microchip Integrated Circuit (Small Outline No-lead) In Stock
Microchip MCP1640-I/MC is a synchronous boost DC/DC converter with 350 mA output current, 500 kHz switching frequency, and input range from 0.65 V to 5.5 V, housed in a DFN-8 package. Available from global distributors with worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline No-lead
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP1640-I/MC Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5874(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-low startup voltage from 0.65 V enabling single-cell alkaline or NiMH battery operation down to end-of-life voltage
- 500 kHz PWM/PFM switching frequency allowing miniature external inductors and capacitors for compact portable designs
- True output disconnect in shutdown eliminating battery drain to near zero when the converter is disabled
- Adjustable output voltage from 2 V to 5.5 V via external resistor divider providing flexibility across multiple load rail requirements
Applications
The MCP1640-I/MC is optimized for battery-powered portable applications such as wireless sensor nodes, Bluetooth Low Energy modules, and handheld instruments that operate from a single AA, AAA, or Li-ion cell. Its 0.65 V minimum input voltage ensures continuous 3.3 V or 5 V output even as the battery discharges to its cutoff voltage, extending usable battery life in field-deployed IoT devices. The DFN-8 package combined with the 500 kHz switching frequency minimizes external component size, making it suitable for ultra-compact PCB designs where board area is at a premium.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | DFN-8 |
| Factory Lead Time | 6Weeks |
| YTEOL | 7 |
| Additional Feature | ALSO OPERATES IN ADJUSTABLE MODE FROM 2V TO 5.5V; PFM CONTROL TECHNIQUE |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Nom | 1.2V |
| JESD-30 Code | R-PDSO-N8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Voltage-Max | 5.5V |
| Output Voltage-Min | 2V |
| Output Voltage-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOLCC8,.11,20 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BOOST |
| Switching Frequency-Max | 575kHz |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Package | Small Outline No-lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP1640-I/MC:
Switching Regulator, Current-mode, 575kHz Switching Freq-Max, PDSO8
Frequently Asked Questions
How low can the input voltage drop before the MCP1640-I/MC stops regulating its output?
The MCP1640-I/MC can start up from input voltages as low as 0.65 V and maintains regulated output down to approximately 0.35 V during operation. This allows a single-cell alkaline battery running from 1.5 V fresh down to 0.9 V end-of-life to continuously power a 3.3 V rail, maximizing usable capacity compared to converters that drop out at 1.8 V or higher.
For a Bluetooth Low Energy sensor node, how does MCP1640-I/MC's 500 kHz switching frequency reduce BOM size?
At 500 kHz, the MCP1640-I/MC requires an inductor of approximately 4.7 µH and output capacitors under 10 µF to maintain stable 3.3 V regulation at 350 mA. These component values correspond to 0402 or 0603 footprints, reducing total solution area to under 25 mm² including the DFN-8 IC, well within the area budget of a compact BLE module PCB measuring 10 mm x 15 mm.
What output voltage range does MCP1640-I/MC support and how is it set?
The MCP1640-I/MC supports an adjustable output voltage range from 2 V to 5.5 V, configured through an external resistor divider connected to the feedback pin. Fixed-output variants are also available for common rails such as 3.3 V and 5 V. This flexibility allows a single PCB design to target multiple product SKUs at different supply voltages by changing only two resistor values.
In a coin-cell powered IoT tag, what makes MCP1640-I/MC's true output disconnect feature important?
True output disconnect in shutdown means the MCP1640-I/MC disconnects the output from the battery when disabled, preventing reverse current leakage that would drain a CR2032 coin cell even with the load powered off. Without this feature, a conventional boost converter may leak 10 µA or more through internal switches, draining a 220 mAh coin cell in under 25 days at rest versus years with true disconnect.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.8100 | $0.81 |
| 25+ | $0.6800 | $17.00 |
| 100+ | $0.6100 | $61.00 |
| 150+ | $0.5874 | $88.11 |
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