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Microchip Technology MCP73837-NVI/MF
- Part No.:
- MCP73837-NVI/MF
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MCP73837-NVI/MF.pdf
- Description:
- IC BATT CHG LI-ION 1CELL 10DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MCP73837-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, 4.20 V fixed charge voltage, thermal regulation, and dual open-drain status outputs (STAT1/STAT2) - designed for compact portable devices requiring dual-input charging and battery temperature monitoring.
For engineers reviewing the MCP73837-NVI/MF datasheet, MCP73837-NVI/MF pinout, MCP73837-NVI/MF application, or MCP73837-NVI/MF equivalent, key selection considerations include its 10-lead 3 mm × 3 mm DFN package, 100 mA / 500 mA USB-selectable current, programmable 15–1000 mA AC adapter current, integrated reverse discharge protection, and PG (Power-Good) output exclusive to the MCP73837 variant.
Technical Context
The MCP73837-NVI/MF implements a CC/CV charge algorithm with factory-set 4.20 V regulation, preconditioning for deeply depleted cells, and automatic recharge at 94% of VREG. It features dual independent current programming paths: PROG1 sets AC adapter current (15–1000 mA via resistor), while PROG2 selects USB current (100 mA or 500 mA via logic level).
Its autonomous power-source arbitration prioritizes VAC over VUSB; UVLO thresholds differ per input (3.45 V start for USB, 4.15 V for AC adapter), and thermal regulation reduces charge current above ~105°C junction temperature. The device includes a 50 µA thermistor bias current source and internal 1.21 V reference for precision regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Voltage | 4.20 V ±0.5% - precisely regulates single-cell Li-ion batteries to maximize capacity and cycle life without overvoltage risk. |
| USB Charge Current | 100 mA (PROG2 = Low) or 500 mA (PROG2 = High) - complies with USB 2.0 unit-load definitions for host-port compatibility. |
| AC Adapter Current | Programmable 15–1000 mA via PROG1-to-VSS resistor - enables flexible system-level current allocation between charging and system load. |
| Thermal Regulation | Active current reduction above ~105°C junction temperature - maintains safe operation during high-ambient or high-power conditions. |
| Operating Temp | -40°C to +85°C ambient - validated for industrial and consumer portable equipment across full environmental range. |
| Package | 10-Lead 3 mm × 3 mm DFN with exposed thermal pad - provides low θJA (41°C/W) for efficient heat dissipation in space-constrained layouts. |
| Status Outputs | STAT1 and STAT2 open-drain outputs - support LED indication or microcontroller polling for charge state (precondition, fast charge, CV, complete, fault). |
| Power-Good Output | PG open-drain output - signals valid input power presence (VAC or VUSB), enabling system power sequencing and brown-out detection. |
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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VAC | AC adapter supply input | Accepts 4.3–6 V input; dominates power selection when present; requires ≥4.7 µF bypass capacitor to VSS. |
| VUSB | USB port supply input | Accepts 4.3–6 V input; used only when VAC is absent; requires ≥1 µF bypass capacitor to VSS. |
| STAT1 | Charge status output 1 | Open-drain indicator for active charge phases (precondition, CC, CV); pulled low during charging. |
| STAT2 | Charge status output 2 | Open-drain indicator for charge completion (pulled low) or fault (high-Z); complements STAT1 for state decoding. |
| VSS | Battery and supply ground reference | Common 0 V return for battery, inputs, and internal circuitry; must connect to EP thermal pad. |
| PROG1 | AC adapter current set & enable | Resistor-to-VSS sets AC charge current (15–1000 mA); >70 kΩ disables device; floating = standby mode. |
| PROG2 | USB current select & USB precondition set | Digital input: Low = 100 mA, High = 500 mA; also defines USB termination/precondition thresholds. |
| PG | Power-Good status output | Open-drain output asserted low when valid VAC or VUSB is present - enables system power-good signaling. |
| THERM | Thermistor monitoring input | Biased with 50 µA current; reads NTC thermistor voltage to monitor battery temperature during charge. |
| VBAT | Battery positive terminal interface | Connects directly to Li-ion/Li-polymer cell anode; includes integrated reverse discharge protection and LDO mode capability. |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous dual-input selection | VAC takes priority over VUSB without external control logic - simplifies system architecture and eliminates manual source switching. |
| Integrated reverse discharge protection | Blocks battery-to-input leakage (<0.55 µA shutdown, <2 µA UVLO) - preserves battery charge when input is removed. |
| Factory-trimmed ±0.5% voltage regulation | Ensures precise 4.20 V termination across temperature and process variation - critical for Li-ion safety and longevity. |
| Thermal regulation with foldback | Dynamically reduces charge current above ~105°C junction temperature - prevents thermal runaway and enables robust operation in sealed enclosures. |
| Preconditioning and automatic recharge | Trickle-charges deeply depleted cells (VBAT < 66.5% VREG) and restarts charging when voltage drops to 94% VREG - extends usable battery runtime. |
| Low-quiescent current standby | Consumes only 0.6–5 µA when PROG pins float - minimizes parasitic drain during storage or idle states. |
Applications
| Smartphones & PDAs | Portable Media Players |
|---|---|
Use Scenario: Compact handheld with dual-input charging (wall adapter + PC USB) and thermal-aware battery management. IC Role / Device Role / Timing Role: Primary linear charger IC managing CC/CV profile, source arbitration, and battery temperature monitoring. Use Value: Enables reliable 4.20 V charging with <0.5% tolerance and automatic thermal derating - preventing overvoltage damage and extending cycle count. | Use Scenario: Battery-powered audio/video player requiring seamless transition between USB bus power and AC adapter. IC Role / Device Role / Timing Role: Autonomous charge controller selecting optimal input source and regulating charge current based on detected supply. Use Value: Eliminates need for external multiplexers or firmware-based source selection - reducing BOM cost and design complexity. |
| Digital Cameras | Bluetooth Headsets |
Use Scenario: High-current imaging device needing fast recharge from AC adapter while supporting USB data+power sync. IC Role / Device Role / Timing Role: Dual-path current regulator delivering up to 1000 mA from AC and 500 mA from USB with independent termination logic. Use Value: Supports rapid 1200 mAh battery recharge in <3 hours (typ.) while maintaining USB compliance during tethered operation. | Use Scenario: Ultra-low-power wearable with strict size constraints and requirement for battery temperature monitoring during charging. IC Role / Device Role / Timing Role: Space-optimized charger providing 100 mA USB charging, thermistor-based thermal cutoff, and minimal quiescent current. Use Value: Integrates thermistor bias, comparator, and status outputs in 3×3 mm DFN - eliminating discrete analog front-end components. |
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 |
|---|---|---|---|
| MCP73831T-2DCI/OT | Single-input (USB-only), no VAC pin, 4.20 V fixed, SOT-23-5 package, no PG output. | Lacks AC adapter support and autonomous source selection - suitable only for USB-powered-only designs. | Select when system uses USB exclusively and board space is extremely limited (SOT-23 footprint). |
| BQ24075RGTR | TI part with 4.20 V regulation, 1 A max charge current, I2C programmability, and integrated LDO - but no PG output and different pinout. | Requires I2C host control for configuration; lacks native thermistor monitoring - needs external ADC or comparator. | Select when firmware-controlled charge parameters (e.g., dynamic current scaling) are required and thermistor integration is handled externally. |
Compared with MCP73831T-2DCI/OT and BQ24075RGTR, the MCP73837-NVI/MF uniquely combines dual-input autonomy, factory-trimmed 4.20 V regulation, integrated PG signaling, and thermistor bias in a thermally optimized DFN - making it optimal for cost-sensitive, space-constrained dual-source portable devices without host processor dependency.
Availability
MCP73837-NVI/MF is available at Aetrix Electronics and suitable for smartphones, portable media players, digital cameras, and Bluetooth headsets requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MCP73837-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, FPGA, and mixed-signal semiconductors headquartered in Chandler, Arizona.
The MCP73837-NVI/MF belongs to Microchip's dedicated linear battery charger product line, engineered specifically for space-constrained portable electronics requiring autonomous dual-input charging, precision voltage regulation, and integrated thermal safety.
FAQ
What is the fixed charge voltage of the MCP73837-NVI/MF?
The MCP73837-NVI/MF has a factory-set constant-voltage regulation point of 4.20 V with ±0.5% accuracy across -5°C to +55°C. This value is fixed and not user-programmable - it is selected at manufacture to match standard single-cell Li-ion battery requirements and is confirmed in the Electrical Characteristics table of DS20002071C.
Does the MCP73837-NVI/MF support both AC adapter and USB charging simultaneously?
No - the MCP73837-NVI/MF performs autonomous source selection and uses only one input at a time. When both VAC and VUSB are present, VAC takes priority and powers the charge circuit; VUSB is ignored until VAC is removed. This behavior is hardwired in the internal logic and requires no external control.
What is the function of the PG pin on the MCP73837-NVI/MF?
The PG (Power-Good) pin on the MCP73837-NVI/MF is an open-drain output that goes low when either VAC or VUSB supply is valid and above UVLO threshold. It provides system-level power presence indication - useful for enabling PMIC rails or waking a host MCU - and is exclusive to the MCP73837 family (not present on MCP73838).
How is USB charge current selected on the MCP73837-NVI/MF?
USB charge current on the MCP73837-NVI/MF is selected via the PROG2 pin: a logic low (≤0.2×VDD) configures 100 mA (1 unit load), and a logic high (≥0.8×VDD) configures 500 mA (5 unit loads). This digital selection eliminates the need for external resistors on the USB path and ensures strict USB 2.0 compliance.
Can the MCP73837-NVI/MF be used without a thermistor?
Yes - the THERM pin can be left unconnected or tied to VSS if battery temperature monitoring is not required. In that case, the thermistor comparator is disabled and thermal fault protection is inactive, but all other charge functions (CC/CV, source selection, status outputs) operate normally. The device does not require thermistor bias current to initiate charging.
MCP73837-NVI/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tube
- 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)
MCP73837-NVI/MF FAQ
1.How can I place an order for MCP73837-NVI/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73837-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 MCP73837-NVI/MF reliable?
The price and inventory of MCP73837-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 MCP73837-NVI/MF is usually 5 days.
3.What payment methods are accepted for MCP73837-NVI/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73837-NVI/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73837-NVI/MF?
MCP73837-NVI/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73837-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 MCP73837-NVI/MF?
For technical support, including MCP73837-NVI/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73837-NVI/MF requirements.
6.How does Aetrix verify that MCP73837-NVI/MF is sourced from the original manufacturer or authorized distributors?
All MCP73837-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 MCP73837-NVI/MF meets industry standards.
7.What is the process for return or replacement of MCP73837-NVI/MF?
All MCP73837-NVI/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP73837-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 MCP73837-NVI/MF part is unused and in its original packaging.
Return procedure for MCP73837-NVI/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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