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Microchip Technology MCP73838T-NVI/MF
- Part No.:
- MCP73838T-NVI/MF
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MCP73838T-NVI/MF.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,587
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Product details
Overview
MCP73838T-NVI/MF 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, thermal regulation, and timer enable (TE) functionality. It delivers up to 1000 mA AC adapter charge current and supports 100/500 mA USB charge profiles in portable medical devices and ultra-mobile electronics.
For engineers reviewing the MCP73838T-NVI/MF datasheet, MCP73838T-NVI/MF pinout, MCP73838T-NVI/MF application, or MCP73838T-NVI/MF equivalent, this page provides verified technical context, real-world design meaning of specifications, validated package and pin functions, confirmed alternative options, and supply-chain support for production-grade BOMs.
Technical Context
The MCP73838T-NVI/MF implements a CC/CV charge algorithm with factory-set 4.20V regulation, programmable AC charge current (15–1000 mA via PROG1), and selectable USB charge current (100/500 mA via PROG2 logic level). Its autonomous power-source arbitration prioritizes VAC over VUSB and enforces USB specification compliance.
It integrates reverse discharge protection, battery temperature monitoring via THERM (50 µA bias), thermal shutdown at 150°C, and a dedicated Timer Enable (TE) input that activates the safety timer when pulled low. The device operates across –40°C to +85°C and enters automatic power-down when VDD falls within 100 mV of VBAT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Voltage | 4.20 V ±0.5% - ensures precise full-charge termination for standard single-cell Li-ion batteries without overvoltage risk |
| AC Charge Current Range | 15–1000 mA - set by 1–10 kΩ resistor on PROG1, enabling flexible system-level current scaling |
| USB Charge Current Options | 100 mA (PROG2 = Low) or 500 mA (PROG2 = High) - complies with USB 2.0 unit-load definitions |
| Thermal Regulation | Active die-temperature-based current limiting - maintains safe operation under high ambient or high-power conditions |
| Safety Timer Options | Disabled, 4/6/8 hours - enabled via TE pin; prevents indefinite charging during fault conditions |
| Operating Temperature | –40°C to +85°C - qualified for industrial and portable medical environments |
| Package | 10-Lead 3 mm × 3 mm DFN with exposed thermal pad - enables compact layout and efficient heat dissipation |
Pinout & Package
Package: 10-Lead 3 mm × 3 mm DFN with exposed thermal pad (EP), internally connected to VSS. Requires PCB thermal pad connection to ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VAC | AC adapter supply input | Primary high-current input (up to 1 A); dominates source selection when present; requires ≥4.7 µF bypass to VSS |
| VUSB | USB port supply input | Fallback input; regulated to 100/500 mA per USB spec; requires ≥1 µF bypass |
| STAT1 / STAT2 | Open-drain status outputs | Indicate charge state (precondition, fast charge, CV, complete); drive LEDs or microcontroller GPIOs with pull-up |
| VSS | Ground reference | Common return for battery, inputs, and internal circuitry; tied to EP for thermal conduction |
| PROG1 | AC charge current programming | Resistor-to-VSS sets IREG; also acts as charge enable-floating or >70 kΩ disables device |
| PROG2 | USB charge current select | Digital input: Low = 100 mA, High = 500 mA; determines precondition/termination ratios for USB mode |
| TE | Timer Enable control | Active-low input; enables built-in safety timer (4/6/8 hr options); absent on MCP73837 |
| THERM | Battery temperature monitor | 50 µA bias current for NTC thermistor; enables JEITA-compliant thermal charge suspend above/below thresholds |
| VBAT | Battery positive connection | Charging output and battery sense node; requires ≥1 µF bypass for stability when battery disconnected |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous dual-source selection | VAC takes priority over VUSB; no external control logic required for seamless source handover |
| Integrated pass transistor | 350 mΩ typical RDS(on) at 105°C - reduces board space and eliminates need for external MOSFET |
| Reverse discharge protection | ≤0.55 µA max reverse leakage in shutdown - preserves battery life when input power is removed |
| Preconditioning disable option | Factory-configured threshold (66.5% of VREG) - safely recovers deeply depleted cells before CC mode |
| UVLO with hysteresis | 3.45 V start / 3.35 V stop (USB), 4.15 V start / 4.10 V stop (AC) - prevents oscillation during brown-out conditions |
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: Primary linear charger managing CC/CV profile, thermal foldback, and autonomous source switching. Use Value: Eliminates discrete FET, current-sense, and comparator circuits; reduces bill-of-materials by ≥4 components while meeting IEC 62368-1 thermal limits. |
Use Scenario: Battery-powered glucose meter or pulse oximeter requiring reliable recharge in field and clinical settings. IC Role / Device Role / Timing Role: Safety-critical charge controller with JEITA-compliant thermistor monitoring and timer-enforced charge termination. Use Value: Enables FDA-aligned design with guaranteed 4.20V ±0.5% regulation, <2 µA reverse discharge, and thermal shutdown at 150°C. |
| Ultra-Mobile Devices (UMD) | Digital Cameras |
Use Scenario: Sub-100g wearable or pocket-sized computing device needing minimal footprint and low quiescent current. IC Role / Device Role / Timing Role: Space-constrained Li-ion charger with 3×3 mm DFN package and 5 µA standby current. Use Value: Achieves <12 mm² solution size including bypass caps; supports USB-C host negotiation via PROG2-controlled current scaling. |
Use Scenario: DSLR or mirrorless camera with removable Li-ion battery pack and rapid AC recharging capability. 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 1200 mAh charge in <2.5 hrs at 1 A while maintaining die temperature <105°C on 4-layer PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion linear charge management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP73837T-NVI/MF | Lacks TE pin; includes PG (Power-Good) output instead; same 4.20V regulation and PROG1/PROG2 functionality | Preferred where input power presence indication (PG) is required over safety timer control | Select when system firmware monitors charge completion via STAT pins and requires explicit AC/USB power-good signaling |
| BQ24075RGTR | TI part with 4.2V regulation, 1.5A max charge current, and integrated LDO; no TE pin; different PROG interface (single resistor for both sources) | Used in cost-sensitive consumer electronics where higher current and integrated LDO simplify power tree | Choose when >1 A charge current or auxiliary 3.3V LDO output is needed; verify thermal design due to higher IQ and no TE-based timer fallback |
Compared with MCP73837T-NVI/MF, the MCP73838T-NVI/MF trades PG output for TE control-enabling hardware-enforced charge timeout without MCU intervention. Versus BQ24075RGTR, it offers tighter voltage tolerance (±0.5% vs ±1.0%), lower reverse leakage (<0.55 µA vs 2 µA), and dedicated thermal monitoring bias, making it preferable for safety- and precision-critical designs.
Availability
MCP73838T-NVI/MF is available at Aetrix Electronics and suitable for portable medical devices, ultra-mobile electronics, and digital cameras requiring stable component supply, long-term lifecycle support, and guaranteed automotive-grade reliability screening.
Supply support for MCP73838T-NVI/MF 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 Inc. is a leading provider of microcontrollers, analog, and Flash-IP solutions, serving industrial, automotive, communications, and consumer markets with high-reliability silicon and development tools.
The MCP7383x family was designed specifically for space-constrained, dual-input Li-ion charging applications in portable electronics-emphasizing integration, safety, and ease of qualification for medical and industrial end equipment.
FAQ
What is the exact charge voltage regulation setting for MCP73838T-NVI/MF?
The MCP73838T-NVI/MF is factory-configured for 4.20V ±0.5% constant-voltage regulation, optimized for standard single-cell Li-ion batteries. This value is fixed and not user-adjustable; other variants (e.g., MCP73838T-235I/MF) offer 4.35V, but MCP73838T-NVI/MF strictly maintains 4.20V per DS20002071C electrical characteristics table.
Does MCP73838T-NVI/MF support battery temperature monitoring?
Yes, MCP73838T-NVI/MF supports battery temperature monitoring via its THERM pin, which sources a precise 50 µA (47–53 µA) bias current for standard 10 kΩ NTC thermistors. The internal comparators detect upper (1.23 V) and lower (0.25 V) thresholds to suspend charging outside JEITA-defined safe ranges.
How does the Timer Enable (TE) pin function on MCP73838T-NVI/MF?
The TE pin on MCP73838T-NVI/MF is an active-low input that enables the internal safety timer. When pulled low, it activates one of three factory-programmed timer periods (4/6/8 hours); when high or floating, the timer is disabled. This hardware-based timeout prevents uncontrolled charging during faults, independent of host MCU control.
What package type and thermal characteristics does MCP73838T-NVI/MF use?
MCP73838T-NVI/MF uses a 10-Lead 3 mm × 3 mm DFN package with exposed thermal pad (EP), internally connected to VSS. Its θJA is 41°C/W on a 4-layer JC51-7 board, enabling efficient heat dissipation during 1 A charging-critical for sustained operation in sealed enclosures.
Can MCP73838T-NVI/MF operate with only USB power, and what current levels are supported?
Yes, MCP73838T-NVI/MF operates autonomously from USB power when VAC is absent. It supports two USB charge current levels: 100 mA (PROG2 = Low) and 500 mA (PROG2 = High), both compliant with USB 2.0 unit-load definitions. Preconditioning and termination thresholds scale proportionally to the selected current.
MCP73838T-NVI/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- 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-DFN (3x3)
MCP73838T-NVI/MF FAQ
1.How can I place an order for MCP73838T-NVI/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73838T-NVI/MF 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/MF reliable?
The price and inventory of MCP73838T-NVI/MF 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/MF is usually 5 days.
3.What payment methods are accepted for MCP73838T-NVI/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73838T-NVI/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73838T-NVI/MF?
MCP73838T-NVI/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73838T-NVI/MF 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/MF?
For technical support, including MCP73838T-NVI/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73838T-NVI/MF requirements.
6.How does Aetrix verify that MCP73838T-NVI/MF is sourced from the original manufacturer or authorized distributors?
All MCP73838T-NVI/MF 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/MF meets industry standards.
7.What is the process for return or replacement of MCP73838T-NVI/MF?
All MCP73838T-NVI/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP73838T-NVI/MF, 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/MF part is unused and in its original packaging.
Return procedure for MCP73838T-NVI/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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