MCP1642B-50I/MS Microchip Integrated Circuit (Small Outline Packages) In Stock
MCP1642B-50I/MS is a current-mode PWM synchronous boost regulator from Microchip with a fixed 5.0 V output, accepting input voltage from 2.5 V to 4.2 V, housed in an 8-pin MSOP package, ideal for battery-powered systems requiring a regulated 5 V supply from a single Li-Ion cell.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MCP1642B-50I/MS Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2609(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP1642B-50I/MS?
- Synchronous boost regulator with fixed 5.0 V output voltage
- Input voltage range: 2.5 V to 4.2 V, compatible with single Li-Ion cell
- Current-mode PWM control for fast transient response
- Compact 8-pin MSOP package for space-constrained designs
- True output disconnect during shutdown to prevent battery drain
- Integrated synchronous rectification for improved efficiency
What is MCP1642B-50I/MS used for?
The MCP1642B-50I/MS is used in portable electronic devices and IoT products powered by a single lithium-ion or lithium-polymer cell, where a regulated 5 V rail is needed to drive USB interfaces, sensors, or 5 V logic. Its compact MSOP-8 footprint and wide input range from 2.5 V to 4.2 V make it suitable for handheld instruments, wireless modules, and wearable technology.
What are the specifications of MCP1642B-50I/MS?
| Manufacturer Package Code | MSOP-8 |
| Factory Lead Time | 12Weeks |
| YTEOL | 14 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 4.2V |
| Input Voltage-Min | 2.5V |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 0.8A |
| Output Voltage-Nom | 5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.19 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Screening Level | TS 16949 |
| Surface Mount | YES |
| Switcher Configuration | BOOST |
| Switching Frequency-Max | 1150kHz |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| ## MCP1642B-50I/MS Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Where can I find the MCP1642B-50I/MS datasheet?
MCP1642B-50I/MS Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP1642B-50I/MS?
Compatible alternatives and drop-in replacements for MCP1642B-50I/MS:
Frequently Asked Questions
What input voltage range does the MCP1642B-50I/MS support, and can it run directly from a Li-Ion battery?
The MCP1642B-50I/MS accepts an input voltage from 2.5 V to 4.2 V, which matches the full discharge-to-full-charge voltage range of a single lithium-ion or lithium-polymer cell. This makes it a direct-fit boost regulator for single-cell Li-Ion battery systems without needing a voltage translation stage.
How does true output disconnect in the MCP1642B-50I/MS prevent current drain when the device is shut down?
When shutdown is asserted, the MCP1642B-50I/MS disconnects the output from the input, preventing the reverse current path through the inductor that would otherwise slowly drain a lithium battery. For battery-powered products in standby or storage, this feature can extend shelf life by reducing quiescent leakage to less than 1 µA.
What makes the MCP1642B-50I/MS suitable for designs that must maintain a 5 V rail as the battery discharges?
The MCP1642B-50I/MS boosts any input in the 2.5 V to 4.2 V range to a stable 5.0 V output. Because a single Li-Ion cell discharges from approximately 4.2 V to 2.7 V, the regulator maintains the 5 V output throughout the usable battery capacity, ensuring connected 5 V peripherals and USB circuits remain operational without premature shutdown.
How does the MSOP-8 package of the MCP1642B-50I/MS affect PCB layout and routing for switching regulators?
The 8-pin MSOP package has a compact body of approximately 3 mm × 3 mm with 0.65 mm pin pitch, enabling a tight switching regulator layout. Minimizing trace lengths between the input capacitor, inductor, and switch pins reduces parasitic inductance and switching noise, which is critical for achieving rated efficiency in the PWM boost topology.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.2609 | $0.26 |
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