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Microchip Technology MCP73833T-FCI/UN
- Part No.:
- MCP73833T-FCI/UN
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP73833T-FCI/UN.pdf
- Description:
- IC BATT CNTRL LI-ION 1CEL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,102
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Product details
Overview
MCP73833T-FCI/UN from Microchip Technology is a standalone linear Li-ion/Li-polymer battery charge management controller in a 10-pin DFN (3 mm × 3 mm) package. It delivers constant-current/constant-voltage charging with thermal regulation, 4.20 V ±0.75% voltage regulation, up to 1 A programmable charge current via external resistor, and integrated reverse discharge protection - designed for USB-powered portable devices including Bluetooth headsets and digital cameras.
For engineers reviewing the MCP73833T-FCI/UN datasheet, MCP73833T-FCI/UN pinout, MCP73833T-FCI/UN application, or MCP73833T-FCI/UN equivalent, this page provides verified technical context, validated pin functions, confirmed thermal regulation behavior, and real-world application constraints - all aligned to DS22005B revision B specifications.
Technical Context
The MCP73833T-FCI/UN implements a fully integrated linear charging architecture with an internal P-channel MOSFET pass transistor (RDS(ON) = 300 mΩ), factory-trimmed voltage regulation (4.20 V nominal), and ratiometric current scaling for preconditioning (10%–100% of IREG) and termination (5%–25% of IREG). Its dual-status outputs (STAT1/STAT2) support LED or microcontroller interface with defined Hi-Z/L states across six operational modes.
Thermal regulation dynamically reduces charge current above ~105°C junction temperature, while thermal shutdown activates at 150°C with 10°C hysteresis. The THERM pin integrates a 50 µA bias current source for NTC thermistor monitoring, comparing against fixed thresholds (1.23 V upper, 0.25 V lower) with 1.3 ms filter time - enabling battery temperature qualification before and during charge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Regulation | 4.20 V ±0.75% - factory-set for standard Li-ion cells; ensures safe full-charge termination without overvoltage stress. |
| Max Charge Current | 1000 mA - set by 1.0 kΩ PROG-to-VSS resistor; supports rapid charging of 180–2000 mAh batteries. |
| Preconditioning Threshold | 66.5% of VREG (≈2.79 V) - triggers trickle charge for deeply depleted cells below safe fast-charge voltage. |
| Charge Termination Ratio | 5% of IREG - halts charging when current drops to 50 mA (at 1 A setting), preventing overcharge and cell degradation. |
| Thermal Shutdown | 150°C with 10°C hysteresis - suspends charging until die cools, providing fail-safe protection during high-ambient or poor-PCB thermal conditions. |
| UVLO Threshold | 3.55 V start / 3.45 V stop - prevents operation below minimum USB supply; 100 mV hysteresis avoids oscillation near threshold. |
| Package | DFN-10 (3 mm × 3 mm) - exposes thermal pad (EP) electrically tied to VSS; θJA = 41°C/W enables compact, thermally robust layout. |
Pinout & Package
Package: DFN-10 (3 mm × 3 mm) with exposed thermal pad (EP) internally connected to VSS. Requires soldering EP to PCB ground plane for thermal performance and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1, 2) | Battery management input supply | Accepts 3.75–6 V input; powers IC and charges battery; bypass with ≥1 µF to VSS. |
| STAT1 (Pin 3) | Charge status output | Open-drain; low during active charge, Hi-Z at EOC - drives LED or MCU interrupt. |
| STAT2 (Pin 4) | Charge status output | Open-drain; Hi-Z during charge, low at EOC - complements STAT1 for dual-state indication. |
| VSS (Pin 5) | 0 V reference | Common ground for battery negative, input supply, and PROG resistor return. |
| PROG (Pin 6) | Current regulation set | Resistor from PROG to VSS sets IREG; floating disables charger and limits reverse discharge to <2 µA. |
| PG (Pin 7) | Power good indicator | Pseudo open-drain; sinks current only; low when VDD > UVLO and VDD > VBAT - signals valid input power. |
| THERM (Pin 8) | Thermistor input | 50 µA bias current source; monitors NTC voltage; faults if outside 0.25 V–1.23 V window. |
| VBAT (Pins 9, 10) | Battery charge control output | Drain of internal P-MOSFET; connects to battery positive; bypass with ≥4.7 µF for >250 mA stability. |
| EP (Pin 11) | Exposed thermal pad | Internally tied to VSS; must be soldered to PCB ground pour to achieve θJA = 41°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated pass transistor | Eliminates external MOSFET and gate driver; reduces BOM count and layout area in space-constrained USB chargers. |
| Programmable preconditioning | Enables safe recovery of deeply discharged Li-ion cells (down to ~2.79 V) using user-selectable current ratio and voltage threshold. |
| Automatic recharge | Reinitiates full charge cycle when battery voltage drops to 94% of VREG (~3.95 V), maintaining battery readiness without host intervention. |
| System Test (LDO) mode | Converts charger into 4.20 V LDO when THERM > (VDD − 100 mV); supplies system load directly without battery - useful for bench validation. |
| Reverse discharge protection | Blocks current flow from battery to input when VDD is absent or low; limits leakage to <2 µA - preserves battery during standby. |
Applications
| USB-Powered Portable Charger | Bluetooth Headset Power Management |
|---|---|
Use Scenario: Charging single-cell Li-ion battery from 5 V USB port in compact enclosure with no host MCU. IC Role / Device Role / Timing Role: Standalone linear charger managing CC/CV profile, thermal foldback, and automatic EOC/recharge - no firmware required. Use Value: Enables certified USB compliance (current limit, thermal safety) with minimal external components: one PROG resistor, two bypass caps, optional thermistor. | Use Scenario: Integrated battery charging in wearable audio device with strict size and thermal constraints. IC Role / Device Role / Timing Role: Primary charge controller delivering 500 mA fast charge and 50 mA termination; STAT1/STAT2 drive status LEDs. Use Value: 3 mm × 3 mm DFN footprint and 41°C/W thermal resistance allow reliable operation inside sealed earbud housing. |
| Digital Camera Battery Pack | MP3 Player On-Board Charging |
Use Scenario: Rechargeable battery pack for consumer camera requiring precise 4.20 V termination and temperature monitoring. IC Role / Device Role / Timing Role: Dual-role controller: charges battery and provides LDO-mode system power during battery removal. Use Value: THERM pin supports 10 kΩ NTC integration; System Test mode allows functional testing without battery installed. | Use Scenario: Embedded charging in portable media player with automatic recharge to maintain playback readiness. IC Role / Device Role / Timing Role: Autonomous charge manager with 94% VREG recharge threshold and 4-hour safety timer. Use Value: Eliminates need for host polling or GPIO control; maintains >95% state-of-charge between user sessions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear Li-ion charge management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24075RGTR | Fixed 4.2 V regulation; no selectable voltage options; 1.5 A max current; integrated LDO for system power. | Lacks programmable preconditioning ratio and recharge threshold; includes VBUS detection for USB enumeration. | Choose BQ24075RGTR when higher current (1.5 A) and integrated system power rail are required; avoid if 4.35 V/4.4 V battery chemistry support is needed. |
| TP4056 | Fixed 4.2 V regulation; no thermistor input; no PG output; 1 A max current; no automatic recharge. | Minimal feature set - suitable only for cost-sensitive, non-temperature-critical applications. | Choose TP4056 only for basic charging where thermal monitoring and autonomous recharge are unnecessary; verify absence of reverse discharge path in final design. |
Compared with BQ24075RGTR and TP4056, the MCP73833T-FCI/UN uniquely supports multiple factory-set voltage options (4.20/4.35/4.40/4.50 V), ratiometric preconditioning/termination, and true dual-status signaling - making it optimal for next-gen Li-ion chemistries and hostless portable designs requiring robust thermal and safety coverage.
Availability
MCP73833T-FCI/UN is available at Aetrix Electronics and suitable for USB-powered portable chargers, Bluetooth headset power management, and digital camera battery packs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MCP73833T-FCI/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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and battery management ICs with broad industrial and automotive qualification.
The MCP73833/4 product line was designed specifically for space-constrained, cost-sensitive portable electronics requiring fully autonomous, thermally robust Li-ion charging - eliminating need for host processor supervision.
FAQ
What is the factory-set voltage regulation for MCP73833T-FCI/UN?
The MCP73833T-FCI/UN is factory-configured for 4.20 V ±0.75% constant-voltage regulation, optimized for standard single-cell Li-ion batteries. This value is fixed per device variant and cannot be adjusted externally - other variants (e.g., MCP73833T-OCI/UN) offer 4.35 V, 4.40 V, or 4.50 V options.
How does the PROG pin configure charge current in MCP73833T-FCI/UN?
The PROG pin sets fast charge current using a resistor to VSS: IREG = 1000 V / RPROG (kΩ). For example, a 1.0 kΩ resistor yields 1000 mA; a 10 kΩ resistor yields 100 mA. Preconditioning and termination currents scale ratiometrically - e.g., 5% termination equals 50 mA at 1 A setting. Floating PROG disables charging entirely.
Does MCP73833T-FCI/UN support battery temperature monitoring?
Yes, MCP73833T-FCI/UN integrates a 50 µA thermistor bias current source on the THERM pin and compares resulting voltage against factory-set thresholds (1.23 V upper, 0.25 V lower). If voltage falls outside this window during charge, it immediately suspends charging and holds timer state - resuming only when thermistor voltage returns to range.
What is the function of the PG pin on MCP73833T-FCI/UN?
The PG (Power Good) pin on MCP73833T-FCI/UN is a pseudo open-drain output that sinks current only. It goes low when VDD exceeds the UVLO threshold (≥3.55 V) and remains above battery voltage (VDD > VBAT), signaling valid input power presence. It must be pulled up only to VDD - not to other rails - due to internal diode path.
Can MCP73833T-FCI/UN operate without a battery connected?
Yes - MCP73833T-FCI/UN supports System Test (LDO) mode. When THERM voltage exceeds (VDD − 100 mV) and no battery is present, it regulates VBAT to the factory-set voltage (4.20 V) with current limited by the PROG resistor. This enables system-level validation and power delivery independent of battery presence.
MCP73833T-FCI/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:
- Current
- Fault Protection:
- Over Temperature
- Charge Current - Max:
- 1.1A
- Battery Pack Voltage:
- 4.2V
- Voltage - Supply (Max):
- 6V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
MCP73833T-FCI/UN FAQ
1.How can I place an order for MCP73833T-FCI/UN through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73833T-FCI/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 MCP73833T-FCI/UN reliable?
The price and inventory of MCP73833T-FCI/UN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73833T-FCI/UN is usually 5 days.
3.What payment methods are accepted for MCP73833T-FCI/UN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73833T-FCI/UN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73833T-FCI/UN?
MCP73833T-FCI/UN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73833T-FCI/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 MCP73833T-FCI/UN?
For technical support, including MCP73833T-FCI/UN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73833T-FCI/UN requirements.
6.How does Aetrix verify that MCP73833T-FCI/UN is sourced from the original manufacturer or authorized distributors?
All MCP73833T-FCI/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 MCP73833T-FCI/UN meets industry standards.
7.What is the process for return or replacement of MCP73833T-FCI/UN?
All MCP73833T-FCI/UN units undergo pre-shipment inspection (PSI). If there is an issue with MCP73833T-FCI/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 MCP73833T-FCI/UN part is unused and in its original packaging.
Return procedure for MCP73833T-FCI/UN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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