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Microchip Technology MCP73838T-NVI/UN
- Part No.:
- MCP73838T-NVI/UN
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP73838T-NVI/UN.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,676
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Product details
Overview
MCP73838T-NVI/UN from Microchip Technology is a fully integrated linear Li-Ion/Li-Polymer battery charge management controller with autonomous AC adapter or USB port source selection, ±0.5% voltage regulation accuracy, 4.20V fixed charge voltage, 1000 mA max AC charge current, and thermal regulation - used in portable medical devices and ultra-mobile consumer electronics.
For engineers reviewing the MCP73838T-NVI/UN datasheet, MCP73838T-NVI/UN pinout, MCP73838T-NVI/UN application, or MCP73838T-NVI/UN equivalent, key selection considerations include its 10-lead 3 mm × 3 mm DFN package, TE (Timer Enable) input for safety timer control, dual PROG inputs for independent AC/USB current programming, and thermistor-based temperature monitoring for safe charging compliance.
Technical Context
The MCP73838T-NVI/UN implements a CC/CV charge algorithm with factory-set 4.20V regulation, selectable preconditioning and termination thresholds, and thermal foldback that dynamically reduces charge current above 150°C junction temperature. Its autonomous power-source arbitration prioritizes VAC over VUSB when both are present.
It integrates pass transistors (350 mΩ typical RDS(on)), current sense (G = 0.001), reverse discharge protection, and LDO-mode operation. The TE pin enables/disables the programmable safety timer (4/6/8 hr options), distinguishing it from the MCP73837 variant which uses PG instead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Voltage | 4.20 V ±0.5% - precisely regulates single-cell Li-ion batteries to JEITA-compliant levels without external feedback resistors. |
| Max AC Charge Current | 1000 mA - set via 1 kΩ PROG1 resistor; supports fast charging of 1200 mAh batteries in under 2 hours. |
| USB Charge Current | 100 mA (PROG2 = Low) or 500 mA (PROG2 = High) - complies with USB 2.0 unit load definitions. |
| Operating Temp Range | -40°C to +85°C - validated across industrial ambient conditions for reliable field deployment. |
| Thermal Shutdown | 150°C with 10°C hysteresis - protects IC and battery during high-power or poor-PCB-thermal-design scenarios. |
| Package | 10-Lead 3 mm × 3 mm DFN with exposed thermal pad - enables compact layout and efficient heat dissipation in space-constrained designs. |
| UVLO Thresholds | VAC start: 4.15 V; VUSB start: 3.45 V - ensures stable startup under varying input supply conditions. |
Pinout & Package
Package: 10-Lead 3 mm × 3 mm DFN with exposed thermal pad (EP), internally connected to VSS. Requires PCB thermal pad connection for optimal thermal performance (θJA = 41°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VAC | AC adapter supply input | Primary high-current input (up to 6 V); dominates over VUSB when both present; requires ≥4.7 µF bypass capacitor. |
| VUSB | USB port supply input | Secondary low-voltage input (VREG + 0.3 V to 6 V); enables USB-powered charging with automatic current selection. |
| STAT1 / STAT2 | Open-drain status outputs | Indicate charge state (precondition, fast charge, CV, complete) via LED or microcontroller GPIO; require external pull-up. |
| VSS | Ground reference | Common return for battery, inputs, and internal circuitry; electrically tied to EP for thermal conduction. |
| PROG1 | AC charge current & enable | Sets AC fast charge current (15–1000 mA) via resistor to VSS; floating = standby; >70 kΩ = shutdown. |
| PROG2 | USB charge current select | Digital input: Low = 100 mA (1 unit load), High = 500 mA (5 unit loads); also sets USB precondition/termination ratios. |
| TE | Timer Enable | Active-low input enabling built-in safety timer (4/6/8 hr); distinguishes MCP73838 from MCP73837 (which has PG instead). |
| THERM | Thermistor monitor | Biases NTC thermistor (2–50 kΩ) with 50 µA current; enables JEITA-compliant temperature-aware charging. |
| VBAT | Battery positive connection | Direct connection to Li-ion cell anode; includes integrated reverse discharge protection and loop stability support (≥1 µF). |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous dual-source selection | VAC automatically overrides VUSB - eliminates need for external power-path controllers or firmware arbitration logic. |
| Integrated current sense & pass FET | Eliminates external sense resistor and discrete MOSFET - reduces BOM count and PCB area in portable designs. |
| Programmable safety timer (TE) | Prevents indefinite charging via hardware-enforced timeout - critical for UL/IEC 62368-1 compliance in consumer medical devices. |
| Thermistor-based temperature monitoring | Enables dynamic charge suspension outside 0°C–45°C battery temp range - satisfies JEITA charging guidelines. |
| Reverse discharge protection | Blocks battery-to-input leakage (<0.55 µA in shutdown) - preserves battery life when system is unpowered. |
Applications
| Smartphones & PDAs | Portable Medical Devices |
|---|---|
Use Scenario: Compact handheld device with dual-input (USB + wall adapter) charging and strict battery safety requirements. IC Role / Device Role / Timing Role: Standalone linear charger managing CC/CV profile, source arbitration, and thermal cutoff. Use Value: Reduces bill-of-materials by integrating pass transistor, current sense, and UVLO - enabling sub-3 mm² solution size. | Use Scenario: Battery-powered glucose meter or pulse oximeter requiring certified safe charging under variable ambient temperatures. IC Role / Device Role / Timing Role: Safety-critical battery manager enforcing JEITA temperature windows and hardware timer-based charge termination. Use Value: Meets IEC 62368-1 thermal fault response requirements without software intervention or external comparators. |
| Ultra-Mobile Devices (UMD) | Digital Cameras |
Use Scenario: Sub-100g wearable or AR glasses needing minimal footprint, low quiescent current, and USB-C compatibility. IC Role / Device Role / Timing Role: Dual-input charger with automatic VAC/VUSB priority and low-standby-current (0.6 µA) sleep mode. Use Value: Extends shelf life with <5 µA shutdown current and eliminates need for external enable sequencing. | Use Scenario: DSLR or mirrorless camera with removable Li-ion pack and rapid recharge capability via AC adapter. IC Role / Device Role / Timing Role: High-current (1 A) linear charger with thermal regulation to prevent overheating during burst charging. Use Value: Delivers full 1000 mA charge current while limiting die temperature to ≤150°C - avoids thermal throttling during field use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion linear charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP73837T-NVI/UN | Replaces TE pin with PG (Power-Good) output; lacks timer enable function; otherwise identical pinout and electrical specs. | Used where input power presence indication is required instead of safety timer control. | Select MCP73837T-NVI/UN only if host system requires PG signal for power-good monitoring and does not need hardware-enforced charge timeout. |
| BQ24075RGTR | TI part with 4.2V regulation, 1.5A max charge current, but no autonomous dual-source selection - requires external power-path control. | Suitable for systems with dedicated power-path manager or firmware-controlled source arbitration. | Choose BQ24075RGTR only when higher charge current (>1A) is needed and external power-path logic is already present. |
Compared with MCP73837T-NVI/UN, the MCP73838T-NVI/UN provides hardware safety timer control instead of power-good signaling - essential for unattended charging; versus BQ24075RGTR, it eliminates external power-path components but caps at 1A and lacks I²C configurability.
Availability
MCP73838T-NVI/UN is available at Aetrix Electronics and suitable for smartphones, portable medical devices, ultra-mobile devices, and digital cameras requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MCP73838T-NVI/UN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a leading provider of microcontrollers, analog devices, and battery management ICs, serving automotive, industrial, and consumer markets with high-reliability silicon solutions.
The MCP7383x family delivers highly integrated, autonomous linear chargers optimized for space-constrained portable electronics - emphasizing simplicity, safety, and minimal external component count.
FAQ
What is the exact charge voltage setting for MCP73838T-NVI/UN?
The MCP73838T-NVI/UN is factory-configured for 4.20 V ±0.5% constant-voltage regulation - matching standard single-cell Li-ion battery requirements. This value is fixed and not user-adjustable; other variants (e.g., MCP73838T-235I/UN) offer 4.35 V or 4.40 V options.
How does the TE pin function on MCP73838T-NVI/UN?
The TE (Timer Enable) pin on MCP73838T-NVI/UN is an active-low input that enables or disables the internal safety timer. When pulled low, the timer runs (4/6/8 hr options per part number); when high, timer functionality is disabled. This pin replaces the PG output found on the MCP73837 variant.
Can MCP73838T-NVI/UN charge batteries using both USB and AC simultaneously?
No - the MCP73838T-NVI/UN autonomously selects only one source at a time: AC adapter input (VAC) takes priority over USB (VUSB). When both are present, VAC powers the system and enables up to 1000 mA charging; VUSB is ignored until VAC is removed.
What is the minimum PROG1 resistor value to achieve 1000 mA charge current with MCP73838T-NVI/UN?
To achieve 1000 mA AC adapter charge current, MCP73838T-NVI/UN requires a 1 kΩ resistor from PROG1 to VSS. The datasheet specifies 900–1100 mA tolerance at this value across -5°C to +55°C, with 105 mA typical at 10 kΩ for lower-current configurations.
Does MCP73838T-NVI/UN support thermistor-based temperature monitoring?
Yes - MCP73838T-NVI/UN includes a dedicated THERM pin with a precision 50 µA bias current source for interfacing with standard 10 kΩ NTC thermistors. It monitors battery temperature continuously and suspends charging outside JEITA-defined safe ranges (e.g., <0°C or >45°C).
MCP73838T-NVI/UN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Battery Chemistry:
- Lithium Ion/Polymer
- Number of Cells:
- 1
- Current - Charging:
- Constant - Programmable
- Programmable Features:
- -
- Fault Protection:
- Over Voltage
- Charge Current - Max:
- 1.1A
- Battery Pack Voltage:
- 4.35V
- Voltage - Supply (Max):
- 6V
- Interface:
- USB
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
MCP73838T-NVI/UN FAQ
1.How can I place an order for MCP73838T-NVI/UN through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73838T-NVI/UN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MCP73838T-NVI/UN reliable?
The price and inventory of MCP73838T-NVI/UN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73838T-NVI/UN is usually 5 days.
3.What payment methods are accepted for MCP73838T-NVI/UN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73838T-NVI/UN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73838T-NVI/UN?
MCP73838T-NVI/UN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73838T-NVI/UN order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MCP73838T-NVI/UN?
For technical support, including MCP73838T-NVI/UN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73838T-NVI/UN requirements.
6.How does Aetrix verify that MCP73838T-NVI/UN is sourced from the original manufacturer or authorized distributors?
All MCP73838T-NVI/UN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCP73838T-NVI/UN meets industry standards.
7.What is the process for return or replacement of MCP73838T-NVI/UN?
All MCP73838T-NVI/UN units undergo pre-shipment inspection (PSI). If there is an issue with MCP73838T-NVI/UN, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MCP73838T-NVI/UN part is unused and in its original packaging.
Return procedure for MCP73838T-NVI/UN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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