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Microchip Technology MCP73833T-AMI/MF
- Part No.:
- MCP73833T-AMI/MF
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MCP73833T-AMI/MF.pdf
- Description:
- IC BATT CONTRL LI-ION 1CEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:12,806
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Product details
Overview
MCP73833T-AMI/MF from Microchip Technology is a stand-alone 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 - enabling compact, USB-compliant portable chargers for consumer electronics.
For engineers reviewing the MCP73833T-AMI/MF datasheet, MCP73833T-AMI/MF pinout, MCP73833T-AMI/MF application, or MCP73833T-AMI/MF equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative options for battery charging subsystem design and BOM optimization.
Technical Context
The MCP73833T-AMI/MF implements a fully integrated linear charging architecture with an internal P-channel MOSFET pass transistor (RDS(ON) = 300 mΩ), precision reference generator (1.21 V), and dual-stage comparator-based control logic for preconditioning, fast charge, constant voltage regulation, and automatic recharge. Its thermal regulation dynamically scales charge current above 105°C to prevent die overheating while maintaining reliability.
It supports factory-set voltage regulation options (4.20 V, 4.35 V, 4.40 V, or 4.50 V), selectable preconditioning current ratios (7.5–100% of IREG), termination thresholds (3.75–25% of IREG), and recharge voltage thresholds (94–96.5% of VREG). The device operates across –40°C to +85°C ambient and includes UVLO (3.55 V start, 3.45 V stop), thermal shutdown (150°C), and thermistor-based temperature monitoring with 50 µA bias current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Regulation | 4.20 V ±0.75% - precisely matches standard single-cell Li-ion chemistry; enables safe full-charge without overvoltage stress. |
| Max Charge Current | 1000 mA - set by 1.0 kΩ PROG-to-VSS resistor; sufficient for fast-charging 180–2000 mAh batteries in portable devices. |
| Thermal Regulation | Active above 105°C junction temperature - reduces ICHARGE to maintain safe die temperature and extend IC lifetime under high-power or poor-heat-sink conditions. |
| Preconditioning Threshold | 66.5% of VREG (≈2.79 V) - triggers trickle charge for deeply depleted cells below safe fast-charge voltage, preventing lithium plating. |
| Charge Termination Ratio | 5% of IREG - ensures full saturation before EOC assertion; avoids premature cutoff during voltage stabilization phase. |
| UVLO Threshold | 3.55 V (start), 3.45 V (stop), 100 mV hysteresis - prevents erratic operation during weak or fluctuating input supply (e.g., marginal USB ports). |
| Thermistor Bias | 50 µA ±6% - drives standard 10 kΩ NTC thermistors for accurate battery temperature sensing across –40°C to +85°C. |
Pinout & Package
Package: 10-pin DFN (3 mm × 3 mm), exposed thermal pad (EP) electrically connected to VSS. Thermal resistance θJA = 41°C/W on 4-layer board - optimized for space-constrained, thermally sensitive applications like Bluetooth headsets and wearables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1,2) | Battery management input supply | Accepts 3.75–6 V input; powers internal circuitry and enables UVLO monitoring; requires ≥1 µF bypass capacitor to VSS. |
| STAT1 (Pin 3) | Charge status output | Open-drain indicator: LOW during active charge, HI-Z at end-of-charge - drives LED or microcontroller GPIO. |
| STAT2 (Pin 4) | Charge status output | Open-drain indicator: HI-Z during charge, LOW at end-of-charge - enables dual-color LED status feedback. |
| VSS (Pin 5) | 0 V reference | Common ground for battery negative, input supply return, and EP connection - critical for stable regulation and thermal performance. |
| PROG (Pin 6) | Current regulation set | Resistor-to-VSS sets fast charge current (IREG = 1000 V/RPROG); floating disables charging and limits reverse discharge to <2 µA. |
| PG (Pin 7) | Power good indication | Pseudo open-drain output: LOW when VDD > UVLO threshold and VDD > VBAT - signals valid input power presence to system host. |
| THERM (Pin 8) | Thermistor input | 50 µA bias current source; compares thermistor voltage to 1.23 V / 0.25 V thresholds - halts charging if battery temperature exceeds safe range. |
| VBAT (Pins 9,10) | Battery charge control output | Drain of internal P-MOSFET; connects directly to battery positive; requires ≥4.7 µF ceramic capacitor for stability at >250 mA load. |
| EP (Pin 11) | Exposed thermal pad | Internally tied to VSS - must be soldered to PCB ground plane to achieve rated θJA = 41°C/W and sustain 1 A continuous operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P-MOSFET pass transistor | RDS(ON) = 300 mΩ eliminates external FET and gate driver - reduces BOM count and PCB footprint in ultra-compact designs. |
| Programmable preconditioning | Configurable current ratio (7.5–100%) and voltage threshold (64–75% of VREG) - safely recovers deeply discharged Li-ion cells without damaging side reactions. |
| Automatic power-down | Enters low-ISS (<100 µA) state when VDD falls within 50 mV of VBAT - prevents battery self-discharge through input path when wall adapter is unplugged. |
| Dual status outputs with defined states | STAT1/STAT2 provide unambiguous charge progress (L/HI-Z) and completion (HI-Z/L) - simplifies firmware polling and eliminates need for external logic. |
| System test (LDO) mode | Enables regulated VOUT = VREG (4.20 V) with IOUT ≤ IREG when THERM > VDD−100 mV - allows battery-less system validation and debug without charger hardware dependency. |
Applications
| USB-Powered Portable Charger | Bluetooth Headset Charging |
|---|---|
Use Scenario: Charging a 3.7 V, 180 mAh Li-polymer battery from a 5 V USB port in a compact wearable enclosure with no fan or heatsink. IC Role / Device Role / Timing Role: Stand-alone linear charge controller managing CC/CV profile, thermal foldback, and end-of-charge signaling via STAT1/STAT2. Use Value: Enables full-charge in <120 minutes with <±0.75% voltage accuracy and <2 µA reverse leakage - preserving battery cycle life and runtime consistency across 500+ charge cycles. | Use Scenario: Integrated charging in a sealed, palm-sized Bluetooth headset with tight thermal constraints and requirement for automatic recharge after partial discharge. IC Role / Device Role / Timing Role: Battery management controller executing preconditioning, fast charge, CV regulation, and 94% VREG-triggered automatic recharge. Use Value: Delivers reliable top-off without user intervention and maintains <100 µA standby current - extending shelf life and eliminating "dead battery" complaints during infrequent use. |
| Digital Camera Power Management | MP3 Player Battery System |
Use Scenario: Recharging a 3.7 V, 850 mAh Li-ion pack in a DSLR grip accessory powered by USB or proprietary DC input. IC Role / Device Role / Timing Role: Primary charge controller with PG output confirming valid input presence and THERM monitoring for safety-critical thermal compliance. Use Value: Supports 1 A fast charge while rejecting input ripple (PSRR = 58 dB @ 1 kHz) - ensuring clean battery voltage during image sensor and processor operation. | Use Scenario: Charging a 3.7 V, 450 mAh Li-polymer battery in a music player with LED status feedback and USB enumeration compatibility. IC Role / Device Role / Timing Role: Linear charger providing dual-status LED drive (STAT1/STAT2), reverse discharge protection, and USB 2.0-compliant current limiting. Use Value: Guarantees <2 µA reverse discharge current when unplugged - preventing overnight battery drain and extending playback time between charges. |
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 only; no selectable voltage options; higher quiescent current (55 µA vs. 100 µA in standby); no system test (LDO) mode. | Lacks automatic recharge and thermistor monitoring - suitable only for basic charging where temperature safety is managed externally. | Select when cost sensitivity outweighs configurability and safety features; verify external thermal monitoring is implemented. |
| MCP73831T-2DCI/OT | 8-pin SOT-23 package; no PG output; fixed 4.2 V regulation; same PROG-programmable current and thermal regulation; lacks THERM pin and automatic recharge. | Targeted at ultra-low-cost, space-limited applications without temperature monitoring or power-good signaling requirements. | Choose for minimal BOM and footprint where full feature set is unnecessary; confirm battery temperature is controlled by system-level means. |
Compared with BQ24075RGTR and MCP73831T-2DCI/OT, the MCP73833T-AMI/MF offers unique factory-selectable voltage options (4.20/4.35/4.40/4.50 V), integrated thermistor interface, automatic recharge, and system test mode - making it optimal for next-generation Li-ion devices requiring flexible chemistry support and enhanced safety.
Availability
MCP73833T-AMI/MF is available at Aetrix Electronics and suitable for USB-powered portable chargers, Bluetooth headsets, digital cameras, and MP3 players requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MCP73833T-AMI/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 is a leading provider of microcontrollers, analog components, and battery management ICs, serving automotive, industrial, and consumer markets with high-reliability semiconductor solutions.
The MCP7383x family is designed specifically for space-constrained, cost-sensitive Li-ion/Li-polymer charging applications - delivering integrated functionality, USB compliance, and thermal robustness without external discrete components.
FAQ
What voltage regulation option is implemented in the MCP73833T-AMI/MF?
The MCP73833T-AMI/MF is factory-configured for 4.20 V ±0.75% constant-voltage regulation - matching the standard full-charge voltage for conventional single-cell Li-ion and Li-polymer batteries. This value is laser-trimmed during manufacturing and cannot be altered by external components or configuration pins.
How is charge current programmed on the MCP73833T-AMI/MF?
Charge current is set using a single external resistor (RPROG) from the PROG pin to VSS, calculated as IREG = 1000 V / RPROG (with RPROG in kΩ and IREG in mA). For example, a 1.0 kΩ resistor configures 1000 mA fast charge current. The MCP73833T-AMI/MF supports RPROG values from 1 kΩ to 20 kΩ, enabling 50–1000 mA range.
Does the MCP73833T-AMI/MF support battery temperature monitoring?
Yes, the MCP73833T-AMI/MF includes a dedicated THERM pin with a precise 50 µA ±6% current source to bias standard 10 kΩ NTC thermistors. It compares the resulting voltage against factory-set thresholds (1.23 V upper, 0.25 V lower) and suspends charging immediately upon out-of-range detection - providing certified thermal fault protection per IEC 62133.
What is the function of the PG pin on the MCP73833T-AMI/MF?
The PG (Power Good) pin on the MCP73833T-AMI/MF is a pseudo open-drain output that goes LOW when VDD exceeds the UVLO threshold (≥3.55 V) and remains above the battery voltage (VDD > VBAT). It signals valid input power presence to the host system and must be pulled up only to VDD - not to other voltage rails - due to its internal diode path.
Can the MCP73833T-AMI/MF operate without a battery connected?
Yes, the MCP73833T-AMI/MF supports System Test (LDO) mode: when the THERM pin voltage exceeds (VDD − 100 mV) and no battery is present, it regulates VBAT to the factory-set VREG (4.20 V) with current limited to the programmed IREG. This enables battery-less system validation and debug - a capability not found in most competing linear chargers.
MCP73833T-AMI/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:
- 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-DFN (3x3)
MCP73833T-AMI/MF FAQ
1.How can I place an order for MCP73833T-AMI/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73833T-AMI/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 MCP73833T-AMI/MF reliable?
The price and inventory of MCP73833T-AMI/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73833T-AMI/MF is usually 5 days.
3.What payment methods are accepted for MCP73833T-AMI/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73833T-AMI/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73833T-AMI/MF?
MCP73833T-AMI/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73833T-AMI/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 MCP73833T-AMI/MF?
For technical support, including MCP73833T-AMI/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73833T-AMI/MF requirements.
6.How does Aetrix verify that MCP73833T-AMI/MF is sourced from the original manufacturer or authorized distributors?
All MCP73833T-AMI/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 MCP73833T-AMI/MF meets industry standards.
7.What is the process for return or replacement of MCP73833T-AMI/MF?
All MCP73833T-AMI/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP73833T-AMI/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 MCP73833T-AMI/MF part is unused and in its original packaging.
Return procedure for MCP73833T-AMI/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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