MCP1640BT-I/MC Microchip Integrated Circuit (Small Outline No-lead) In Stock
The MCP1640BT-I/MC is a synchronous boost converter from Microchip operating at 500 kHz with up to 300 mA output current. It accepts input voltages as low as 0.35 V and regulates output from 2 V to 5.5 V in adjustable mode. Housed in a compact 8-pin DFN package, it suits single-cell and energy-harvesting applications.
- Manufacturer
- Microchip
- Package
- Small Outline No-lead
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP1640BT-I/MC Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5900(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
- Input voltage range as low as 0.35 V enabling single-cell alkaline or NiMH operation
- 300 mA synchronous boost topology for high efficiency up to 96%
- 500 kHz switching frequency reduces external inductor and capacitor size
- Adjustable output from 2 V to 5.5 V with current-mode PWM control
- True input disconnect prevents battery drain when disabled
Applications
The MCP1640BT-I/MC is designed for portable electronics that require boosting a single alkaline, NiMH, or lithium cell to a regulated 3.3 V or 5 V rail. Its ultra-low start-up voltage of 0.35 V makes it suitable for energy-harvesting systems powered by thermoelectric generators, small solar panels, or piezoelectric transducers. Wireless sensor nodes, handheld meters, and IoT edge devices benefit from its high efficiency and tiny DFN-8 footprint.
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 |
| 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 | 8542.39.00.01 |
| Country of Origin | Malaysia, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP1640BT-I/MC:
Switching Regulator, Current-mode, 575kHz Switching Freq-Max, PDSO8
Frequently Asked Questions
How low can the input voltage go while the MCP1640BT-I/MC still starts up and delivers regulated output?
The MCP1640BT-I/MC can start up from an input as low as 0.35 V and continues operating down to approximately 0.65 V under load. This allows it to extract usable energy from a nearly depleted alkaline AA cell or a 1-cell NiMH pack that a conventional regulator would treat as dead, extending product runtime significantly.
What output voltage range does the MCP1640BT-I/MC support in adjustable mode, and how is it set?
In adjustable mode, the output can be programmed from 2 V to 5.5 V using an external resistor divider connected to the feedback pin. A fixed 5 V version is also available. For a 3.3 V output from a single cell, two resistors in the 100 kΩ range give the correct feedback ratio while keeping bias current losses below 10 µA.
What switching frequency does the MCP1640BT-I/MC use, and how does this affect external component selection?
The MCP1640BT-I/MC switches at a fixed 500 kHz, which is high enough to use a 4.7 µH to 10 µH inductor and 10 µF output capacitor in small 0402 or 0603 footprints. This reduces total solution size to under 15 mm² on a two-layer PCB, which is critical for compact wearables and IoT modules.
Can the MCP1640BT-I/MC be used in energy-harvesting designs powered by solar or thermoelectric sources?
Yes. Because the MCP1640BT-I/MC starts up from 0.35 V and draws as little as 18 µA quiescent current, it is well matched to intermittent energy sources such as small photovoltaic cells (50 mW class) or thermoelectric generators producing 0.5 V to 1.5 V. The true-input-disconnect feature ensures zero reverse leakage when the harvested voltage drops to zero, protecting the storage capacitor or supercap.
What package does MCP1640BT-I/MC use and what are its thermal characteristics for 300 mA operation?
The MCP1640BT-I/MC is packaged in an 8-pin DFN (2 mm x 3 mm) with an exposed thermal pad. At 300 mA output and 5 V, the internal power dissipation is roughly 75 mW in the converter switches; the DFN thermal resistance θJA of approximately 43 °C/W keeps junction temperature well below the 125 °C maximum in most ambient conditions.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.8100 | $0.81 |
| 25+ | $0.6800 | $17.00 |
| 100+ | $0.6100 | $61.00 |
| 1000+ | $0.5900 | $590.00 |
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