MCP1640T-I/MC Microchip Integrated Circuit (Small Outline No-lead) In Stock
Microchip MCP1640T-I/MC is a synchronous boost DC-DC converter in DFN-8 package, operating from inputs as low as 1.2 V with adjustable output from 2 V to 5.5 V using PFM/PWM control. Designed for single-cell battery boost and low-voltage energy harvesting applications.
- Manufacturer
- Microchip
- Package
- Small Outline No-lead
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP1640T-I/MC Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4875(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 starts from 0.65 V (start-up) / 1.2 V nominal enabling single-cell NiMH or alkaline battery operation
- Adjustable output voltage from 2 V to 5.5 V via external resistor divider
- Automatic PFM/PWM control for high efficiency at light and heavy loads
- True output disconnect during shutdown for zero-leakage in battery applications
- Current-mode PWM architecture for fast transient response
- Compact DFN-8 package enabling minimal PCB footprint
- RoHS-compliant Pb-free construction
Applications
The MCP1640T-I/MC is optimized for single-cell alkaline or NiMH battery-powered portable devices such as wireless sensors, IoT nodes, and handheld instruments that require a regulated 3.3 V or 5 V rail from a single 1.5 V or 1.2 V cell. Its ability to start up from inputs as low as 0.65 V and operate efficiently at light loads via PFM mode extends battery life in duty-cycled applications. The adjustable output and true load disconnect make it suitable for energy harvesting circuits where the source voltage varies and zero-leakage in shutdown is required.
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 | 8542.39.00.01 |
| Country of Origin | Malaysia, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCP1640T-I/MC:
Switching Regulator, Current-mode, 575kHz Switching Freq-Max, PDSO8
Switching Regulator, Current-mode, 575kHz Switching Freq-Max, PDSO8
Switching Regulator, Current-mode, 575kHz Switching Freq-Max, PDSO8
Frequently Asked Questions
What is the minimum input voltage at which the MCP1640T-I/MC can start up, and what cell types does this support?
The MCP1640T-I/MC can start up from input voltages as low as 0.65 V and continues operating down to approximately 0.35 V in keep-alive mode. This threshold enables operation from a single partially-discharged alkaline cell (1.5 V fresh, dropping to below 1.0 V end of life) or a single NiMH cell (1.2 V nominal), extending system runtime from nearly depleted batteries.
How is the output voltage of the MCP1640T-I/MC set, and what range is achievable?
Output voltage of the MCP1640T-I/MC is set by a resistor divider connected from the output to the feedback pin. The adjustable range spans 2 V to 5.5 V, allowing the designer to target 3.3 V for microcontrollers, 5 V for USB-powered peripherals, or any intermediate voltage. The PFM/PWM hybrid control maintains regulation across this range from light loads up to the device's rated output current.
What efficiency advantages does the PFM mode in the MCP1640T-I/MC provide for battery-powered IoT devices?
In PFM (pulse frequency modulation) mode, the MCP1640T-I/MC reduces switching frequency at light loads, lowering gate drive losses and maintaining high efficiency — typically above 80% — even when the load current drops to tens of microamps. This is critical for duty-cycled IoT nodes where the microcontroller is in deep sleep most of the time; the boost converter itself draws minimal quiescent current, allowing multi-year operation from a single AA or AAA alkaline cell.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.8100 | $0.81 |
| 25+ | $0.6800 | $17.00 |
| 100+ | $0.6100 | $61.00 |
| 250+ | $0.6000 | $150.00 |
| 500+ | $0.5250 | $262.50 |
| 1000+ | $0.4875 | $487.50 |
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