MCP1640D-I/MC Microchip Integrated Circuit (Small Outline No-lead) In Stock
MCP1640D-I/MC is a synchronous boost DC/DC converter with 350 mA switch current, 500 kHz fixed frequency, 0.35 V start-up voltage, and adjustable output from 2 V to 5.5 V in an 8-pin DFN package from Microchip. Available from stock worldwide.
- Manufacturer
- Microchip
- Package
- Small Outline No-lead
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP1640D-I/MC Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5560(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
- 0.35 V ultra-low start-up voltage enabling operation from a single AAA or AA alkaline cell as it discharges below 1 V
- 500 kHz fixed-frequency PWM control with 350 mA peak switch current for compact inductor and capacitor selection
- Adjustable output voltage from 2 V to 5.5 V via external resistor divider covering 3.3 V and 5 V common logic rails
- Automatic bypasss mode at high input-to-output ratios maintaining output voltage when Vin exceeds Vout for uninterrupted power delivery
Applications
The MCP1640D-I/MC is designed for single-cell or dual-cell battery-powered devices that need a stable 3.3 V or 5 V rail as battery voltage drops from 1.5 V down to 0.35 V during discharge. It is a natural fit for portable sensor nodes, BLE beacons, and handheld meters powered by AA or AAA alkaline batteries where maximum energy extraction from each cell extends product runtime. The 8-pin DFN package and 500 kHz switching frequency allow a minimal footprint power stage with a small 4.7 µH inductor and two ceramic capacitors.
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
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How low can the input voltage go before MCP1640D-I/MC stops regulating its output?
The MCP1640D-I/MC starts up from input voltages as low as 0.35 V and regulates down to approximately 0.65 V in steady-state operation. This allows the converter to extract energy from a deeply discharged AA alkaline cell, extending usable battery life significantly compared to converters that cut off at 0.9 V or 1.0 V input.
What output voltage range can MCP1640D-I/MC supply and how is it configured for a 3.3 V output?
The MCP1640D-I/MC output is adjustable from 2 V to 5.5 V using two external resistors connected to the feedback pin. For a 3.3 V output from a single 1.5 V AA cell, a resistor divider setting VFBK = 1.21 V is calculated as R1 = 1.73 MΩ and R2 = 1 MΩ, and the 500 kHz switching frequency keeps the required inductor below 4.7 µH at 350 mA peak current.
Which inductor and capacitor values are recommended for MCP1640D-I/MC in a compact 3.3 V, 100 mA boost design?
Microchip application notes recommend a 4.7 µH to 10 µH shielded inductor with DCR below 500 mΩ and a 10 µF ceramic output capacitor for 3.3 V output at up to 100 mA load. At 500 kHz switching frequency, this combination fits in a footprint smaller than 10 mm x 10 mm, suitable for battery-powered IoT nodes with tight PCB space budgets.
For a dual-AA battery product needing 5 V output, does MCP1640D-I/MC provide enough current and what efficiency can be expected?
From dual AA batteries at 3 V input to 5 V output, the MCP1640D-I/MC sustains a typical output current of 100 mA to 150 mA at peak converter efficiency of approximately 90%. The 350 mA peak switch current limits output current as input voltage drops, so for loads above 200 mA at 5 V output, a higher-current boost converter such as MCP1640C or MCP1643 should be considered instead.
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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 |
| 5100+ | $0.5680 | $2896.80 |
| 7500+ | $0.5560 | $4170.00 |
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