MCP73837-NVI/UN Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip MCP73837-NVI/UN is a single-cell Li-Ion linear battery charger supporting dual USB and DC input sources, with 4.35 V charge termination and up to 1 A charge current, housed in a 10-pin MSOP package for compact portable device charging applications.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 10
- Lifecycle
- ACTIVE
- Datasheet
- MCP73837-NVI/UN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.9850(MOQ 100)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual-input USB and DC power-path selection for flexible charging source integration
- 4.35 V accurate charge termination for high-voltage Li-Ion cells maximizing capacity
- Programmable charge current up to 1 A via external resistor
- Integrated power-good (PG) status output for system power management
- Compact 10-pin MSOP package enabling small-footprint wearable and handheld designs
Applications
The MCP73837-NVI/UN is designed for single-cell Li-Ion battery charging in portable consumer electronics such as wearables, handheld medical devices, and Bluetooth accessories that must accept power from both USB ports and dedicated DC adapters. Its 4.35 V termination voltage supports high-energy-density cell variants, while the adjustable charge current allows optimization between charge speed and thermal dissipation in thermally constrained enclosures.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | MSOP-10 |
| Factory Lead Time | 7Weeks |
| YTEOL | 9 |
| Adjustable Threshold | YES |
| Analog IC - Other Type | LINEAR BATTERY CHARGER |
| JESD-30 Code | S-PDSO-G10 |
| JESD-609 Code | e3 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP10,.19,20 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Supply Current-Max (Isup) | 3mA |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 4.65V |
| Supply Voltage-Nom (Vsup) | 5.35V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +4.35V |
| Package | Small Outline Packages |
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 | Thailand |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the MCP73837-NVI/UN handle automatic switchover between a USB 5 V input and a DC adapter, and what is the priority order?
The MCP73837 monitors both the USB and DC input pins simultaneously and preferentially selects the DC input when it exceeds roughly 4.35 V, falling back to the USB 5 V path automatically if the DC supply is absent. This priority scheme ensures the battery charges from a wall adapter at the full programmed current up to 1 A, while USB charging at up to 500 mA activates only when no adapter is connected, without requiring any firmware intervention.
For a wearable device targeting 1,000 mAh cell capacity, what charge time should be expected with MCP73837-NVI/UN at maximum current?
At the maximum 1 A charge current, a depleted 1,000 mAh lithium-ion cell reaches approximately 70–80% capacity in about 1 hour during constant-current phase. The full charge cycle including the constant-voltage taper phase to 4.35 V termination typically completes in 1.5 to 2 hours, depending on cell impedance and initial state of charge, which is comparable to dedicated charger ICs in this current class.
What advantage does the 4.35 V termination of MCP73837-NVI/UN offer over a standard 4.2 V charger for high-density cells?
Modern high-voltage lithium-ion cells rated for 4.35 V store approximately 10–13% more energy than the same cell charged only to 4.2 V, translating directly to longer battery life per charge cycle. Using MCP73837 in a wearable with a 500 mAh cell at 4.35 V yields an effective capacity equivalent to a 550–565 mAh cell at 4.2 V, without any physical size increase, which is meaningful for slim form-factor devices where cell size cannot be increased.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 100+ | $1.1400 | $114.00 |
| 1000+ | $1.1100 | $1110.00 |
| 2000+ | $1.1000 | $2200.00 |
| 5000+ | $0.9970 | $4985.00 |
| 7500+ | $0.9880 | $7410.00 |
| 10000+ | $0.9850 | $9850.00 |
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