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Microchip Technology MCP73833-BZI/MF
- Part No.:
- MCP73833-BZI/MF
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MCP73833-BZI/MF.pdf
- Description:
- IC BATT CONTRL LI-ION 1CEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,924
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Product details
Overview
MCP73833-BZI/MF from Microchip Technology is a standalone linear Li-ion/Li-polymer charge management controller in a 10-lead DFN-10 (3 mm × 3 mm) package, integrating pass transistor, current sense, and reverse discharge protection. It delivers 4.20 V ±0.75% constant-voltage regulation, programmable fast-charge current up to 1 A via external PROG resistor, and thermal regulation for reliability in portable USB-powered devices.
For engineers reviewing the MCP73833-BZI/MF datasheet, MCP73833-BZI/MF pinout, MCP73833-BZI/MF application, or MCP73833-BZI/MF equivalent, this device supports precise battery charging control with preconditioning, automatic end-of-charge detection, dual status outputs (STAT1/STAT2), thermistor-based temperature monitoring, and low-dropout LDO mode for system test - all critical for space-constrained, cost-sensitive consumer electronics.
Technical Context
The MCP73833-BZI/MF implements a constant-current/constant-voltage (CC/CV) charge algorithm with factory-set voltage options (4.20 V standard), ratiometric preconditioning (10–100% of IREG), and termination (5–25% of IREG). Its internal P-channel MOSFET pass transistor features 300 mΩ typical RDS(on) at 105°C, enabling efficient linear regulation without external switching components.
Thermal regulation dynamically reduces charge current above ~105°C junction temperature, while thermal shutdown activates at 150°C ±10°C hysteresis. The device integrates a 50 µA thermistor bias current source, dual voltage comparators (1.23 V / 0.25 V thresholds), and UVLO with 3.55 V start/3.45 V stop and 100 mV hysteresis - ensuring safe operation across -40°C to +85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Regulation | 4.20 V ±0.75% - factory-trimmed reference ensures accurate full-charge termination for single-cell Li-ion batteries. |
| Max Charge Current | 1000 mA - set by 1.0 kΩ PROG-to-VSS resistor; enables rapid charging of 500–2000 mAh batteries. |
| Preconditioning Threshold | 66.5% of VREG - triggers trickle charge below ~2.8 V battery voltage to safely recover deeply depleted cells. |
| Charge Termination Ratio | 5% of IREG - halts fast charge when current drops to 50 mA (at 1 A setting), preventing overcharge and cell stress. |
| Thermistor Bias Current | 50 µA ±6% - provides stable excitation for standard 10 kΩ NTC thermistors without supply dependency. |
| UVLO Threshold | 3.55 V start / 3.45 V stop - prevents operation during insufficient input (e.g., weak USB port) and blocks reverse discharge. |
| Package Thermal Resistance | θJA = 41 °C/W - DFN-10 package enables high-power dissipation in compact layouts without forced airflow. |
Pinout & Package
Package: DFN-10 (3 mm × 3 mm), exposed thermal pad (EP) electrically connected to VSS. Requires soldering EP to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1,2) | Battery management input supply | Dual-input configuration accepts 3.75–6 V; powers internal circuitry and enables UVLO protection. |
| STAT1 / STAT2 (Pins 3,4) | Open-drain charge status outputs | Drive LEDs or microcontroller inputs: STAT1=LOW/STAT2=Hi-Z = charging; STAT1=Hi-Z/STAT2=LOW = charge complete. |
| VSS (Pin 5) | 0 V reference | Common ground for battery negative, input supply return, and EP connection - mandatory for thermal performance. |
| PROG (Pin 6) | Current regulation set and enable | Resistor to VSS sets IREG; floating disables charger and limits reverse discharge to <2 µA. |
| PG (Pin 7) | Power good indication | Pseudo-open-drain output sinks current when VDD > UVLO threshold and VDD > VBAT - signals valid input power. |
| THERM (Pin 8) | Thermistor input | 50 µA bias current enables temperature qualification; comparator trips at 1.23 V (hot) or 0.25 V (cold) thresholds. |
| VBAT (Pins 9,10) | Battery charge control output | Drain of integrated P-MOSFET; connects directly to battery anode; requires ≥1 µF ceramic bypass for stability. |
| EP (Pin 11) | Exposed thermal pad | Internally tied to VSS; must be soldered to large copper pour for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated pass transistor | Eliminates external MOSFET and gate driver, reducing BOM count and PCB area in USB-charger designs. |
| Programmable preconditioning | Configurable trickle-charge ratio (10–100%) and voltage threshold (66.5% VREG) enables safe recovery of cells down to ~2.8 V. |
| Automatic recharge | Reinitiates charging when battery voltage drops to 94–96.5% of VREG, maintaining full capacity without host intervention. |
| System test (LDO) mode | Activates by pulling THERM > (VDD − 100 mV); regulates VBAT to 4.20 V with current limit matching IREG - useful for battery-less system validation. |
| Reverse discharge protection | Blocks current flow from battery to VDD when input is absent, limiting leakage to <2 µA - preserves battery life during storage. |
Applications
| USB-Powered Portable Devices | Wearable Health Monitors |
|---|---|
|
Use Scenario: Charging compact devices like Bluetooth headsets or smart earbuds from 5 V USB ports with strict size constraints. IC Role / Device Role / Timing Role: Standalone linear charger managing CC/CV profile, thermistor-based temperature safety, and dual-LED status feedback. Use Value: Enables single-chip, no-external-FET charging with <2 µA reverse leakage and 41 °C/W thermal resistance - critical for sub-20 mm² PCB footprints. |
Use Scenario: Powering continuous-sensing wearables (e.g., pulse oximeters) requiring reliable Li-polymer charging and thermal fault response. IC Role / Device Role / Timing Role: Battery management controller executing preconditioning, CV regulation, and automatic recharge while monitoring NTC thermistor voltage. Use Value: Factory-set 4.20 V ±0.75% regulation and 50 µA thermistor bias ensure medical-grade accuracy and consistent temperature qualification across production units. |
| Industrial Handheld Terminals | Wireless IoT Sensors |
|
Use Scenario: Recharging ruggedized barcode scanners or asset trackers used in warehouses with variable ambient temperatures (-40°C to +85°C). IC Role / Device Role / Timing Role: Linear charge controller providing thermal regulation, UVLO hysteresis, and charge-complete signaling to host MCU via STAT2. Use Value: 150°C thermal shutdown with 10°C hysteresis and -40°C to +85°C guaranteed operation prevent field failures in uncontrolled environments. |
Use Scenario: Enabling multi-year battery life in sealed environmental sensors powered by small Li-polymer cells. IC Role / Device Role / Timing Role: Low-quiescent charger with 100 µA standby current and automatic power-down when VDD falls within 50 mV of VBAT. Use Value: Reduces system sleep-mode current to <100 µA and eliminates external enable logic - extending battery runtime beyond 5 years. |
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 |
|---|---|---|---|
| MCP73831T-2DCI/OT | Single-pin SOT-23-5 package; fixed 4.2 V regulation; no PG output; no thermistor input; max 500 mA charge current. | Suitable only for ultra-low-cost, non-temperature-monitored applications with <500 mA requirements. | Select when board space is extreme (<1.6 mm²) and thermal monitoring is unnecessary. |
| BQ24075RGTR | 3 mm × 3 mm QFN-16; integrated LDO path; 1.5 A max current; I2C programmability; different pinout and thermal pad layout. | Requires redesign for I2C interface, higher current capability, and dual-path power routing (battery + system). | Choose when system-side power delivery (VIN → SYS) alongside charging is required, and firmware configurability is needed. |
Compared with MCP73831T-2DCI/OT, the MCP73833-BZI/MF adds thermistor support, PG output, and 1 A capability in the same DFN footprint; versus BQ24075RGTR, it offers simpler analog-only control and lower component count but lacks I2C and system-power-path functionality.
Availability
MCP73833-BZI/MF is available at Aetrix Electronics and suitable for USB chargers, wearable health monitors, industrial handheld terminals, and wireless IoT sensors requiring stable component supply, long-lifecycle availability, and guaranteed -40°C to +85°C operation.
Supply support for MCP73833-BZI/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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs, with a focus on embedded control and energy-efficient solutions.
The MCP73833-BZI/MF belongs to Microchip's linear battery charger product line, designed specifically for cost-sensitive, space-constrained portable electronics requiring robust, integrated Li-ion charging without external FETs or complex configuration.
FAQ
What is the factory-set voltage regulation for MCP73833-BZI/MF?
The MCP73833-BZI/MF is factory-configured for 4.20 V ±0.75% constant-voltage regulation, optimized for standard single-cell Li-ion and Li-polymer batteries. This value is laser-trimmed during production and cannot be adjusted externally - unlike other variants in the MCP73833/4 family offering 4.35 V, 4.40 V, or 4.50 V options.
How does the MCP73833-BZI/MF handle thermal regulation during charging?
The MCP73833-BZI/MF continuously monitors die temperature and reduces charge current above ~105°C to maintain safe operating conditions. At 150°C, it triggers thermal shutdown with 10°C hysteresis. This regulation is implemented entirely internally - no external components or firmware are required to manage thermal derating during high-ambient or high-power charging scenarios.
Can the MCP73833-BZI/MF operate without a battery connected?
Yes - the MCP73833-BZI/MF supports System Test (LDO) mode. When THERM is driven above (VDD − 100 mV) and no battery is present, it regulates VBAT to its factory-set 4.20 V with current limiting matching the programmed IREG. This allows powering downstream circuitry during development or battery-less system validation.
What is the function of the PG pin on the MCP73833-BZI/MF?
The PG (Power Good) pin on the MCP73833-BZI/MF is a pseudo-open-drain output that sinks current when VDD exceeds the UVLO threshold (≥3.55 V) and remains above the battery voltage (VBAT). It signals valid input power presence to host systems and must be pulled up only to VDD - not to other voltage rails - due to its internal diode path.
Does the MCP73833-BZI/MF require external components for basic operation?
Yes - minimal external components are required: a single PROG resistor to set charge current, ≥1 µF ceramic capacitor on VBAT for stability, ≥1 µF capacitor on VDD for bypass, and optionally a 10 kΩ NTC thermistor on THERM. No external MOSFET, op-amps, or timing capacitors are needed, making the MCP73833-BZI/MF a true single-chip solution.
MCP73833-BZI/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:
- 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)
MCP73833-BZI/MF FAQ
1.How can I place an order for MCP73833-BZI/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73833-BZI/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 MCP73833-BZI/MF reliable?
The price and inventory of MCP73833-BZI/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73833-BZI/MF is usually 5 days.
3.What payment methods are accepted for MCP73833-BZI/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73833-BZI/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73833-BZI/MF?
MCP73833-BZI/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73833-BZI/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 MCP73833-BZI/MF?
For technical support, including MCP73833-BZI/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73833-BZI/MF requirements.
6.How does Aetrix verify that MCP73833-BZI/MF is sourced from the original manufacturer or authorized distributors?
All MCP73833-BZI/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 MCP73833-BZI/MF meets industry standards.
7.What is the process for return or replacement of MCP73833-BZI/MF?
All MCP73833-BZI/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP73833-BZI/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 MCP73833-BZI/MF part is unused and in its original packaging.
Return procedure for MCP73833-BZI/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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