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Microchip Technology MCP73833-B6I/MF
- Part No.:
- MCP73833-B6I/MF
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MCP73833-B6I/MF.pdf
- Description:
- IC BATT CONTRL LI-ION 1CEL 10DFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MCP73833-B6I/MF from Microchip Technology is a stand-alone linear Li-ion/Li-polymer battery charge management controller in a 10-lead DFN-10 (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 PROG resistor), and integrated reverse discharge protection - optimized for USB-powered portable devices including Bluetooth headsets and digital cameras.
For engineers reviewing the MCP73833-B6I/MF datasheet, MCP73833-B6I/MF pinout, MCP73833-B6I/MF application, or MCP73833-B6I/MF equivalent, key selection criteria include its factory-set 4.20 V regulation, thermal foldback behavior at >105°C, dual status outputs (STAT1/STAT2), thermistor-based temperature monitoring, and compatibility with standard 10 kΩ NTC sensors.
Technical Context
The MCP73833-B6I/MF implements a fully autonomous linear charging algorithm with preconditioning (trickle charge), fast-charge CC mode, CV regulation, automatic end-of-charge termination (based on ITERM = 5% of IREG), and automatic recharge (at VRTH = 94% of VREG). Its internal P-channel MOSFET pass transistor features 300 mΩ typical RDS(ON), enabling efficient low-dropout operation with minimal external components.
Thermal regulation dynamically reduces charge current above ~105°C junction temperature to prevent overheating, while thermal shutdown activates at 150°C with 10°C hysteresis. The device supports system test (LDO) mode via THERM pin override, delivering regulated output at the selected VREG (4.20 V here) without battery connection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Regulation | 4.20 V ±0.75% - precise termination threshold for single-cell Li-ion batteries; ensures safe full-charge without overvoltage stress. |
| Max Charge Current | 1000 mA - programmable via 1.0 kΩ PROG-to-VSS resistor; enables rapid charging of 1000–2000 mAh cells. |
| Preconditioning Threshold | 66.5% of VREG (≈2.79 V) - triggers trickle charge for deeply depleted cells; prevents lithium plating. |
| Charge Termination Ratio | 5% of IREG - ends fast charge when current drops to 50 mA (at 1 A setting); balances capacity recovery and cycle life. |
| Thermal Regulation Start | ~105°C junction - begins linear current reduction to maintain reliability under high ambient or high-power conditions. |
| THERM Bias Current | 50 µA ±6% - stable excitation for 10 kΩ NTC thermistors; enables accurate battery temperature monitoring across -40°C to +85°C. |
| UVLO Threshold | 3.55 V (typical) with 100 mV hysteresis - prevents operation below safe input voltage; avoids brownout-induced instability. |
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 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 internal circuitry and gate drive; bypass with ≥1 µF to VSS. |
| STAT1 / STAT2 (Pins 3, 4) | Open-drain charge status outputs | Drive LEDs or microcontroller inputs; STAT1 = LOW during charge, STAT2 = LOW at EOC; both Hi-Z in shutdown. |
| VSS (Pin 5) | 0 V reference | Common return for battery negative, input supply, PROG resistor, and EP; must be low-impedance ground. |
| PROG (Pin 6) | Current regulation set and enable | Resistor to VSS sets IREG (1000 mA @ 1.0 kΩ); 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 and VDD > VBAT; must pull up only to VDD. |
| THERM (Pin 8) | Thermistor input | 50 µA bias source for NTC; compares to 1.23 V / 0.25 V thresholds; fault halts charging if out-of-range. |
| VBAT (Pins 9, 10) | Battery charge control output | Drain of internal P-MOSFET; connects to battery positive; bypass with ≥4.7 µF ceramic capacitor for stability at >250 mA. |
| EP (Pin 11) | Exposed thermal pad | Internally tied to VSS; mandatory PCB thermal land connection for θJA = 41°C/W and reliable 1 A operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P-MOSFET pass transistor | RDS(ON) = 300 mΩ typ. - eliminates external FET, reduces BOM count, and simplifies layout for space-constrained designs. |
| Programmable preconditioning & recharge thresholds | VPTH = 66.5% VREG, VRTH = 94% VREG - configurable via part variant; prevents damage from over-discharged cells and maintains SOC. |
| Thermal regulation with foldback | Linear current reduction starting ~105°C - sustains safe operation without abrupt shutdown; preserves charge progress during thermal stress. |
| Dual independent status outputs | STAT1 active-low during charge, STAT2 active-low at EOC - enables discrete LED indicators or host MCU state polling without additional logic. |
| System test (LDO) mode | Enabled by driving THERM > (VDD – 100 mV) - provides regulated 4.20 V output for battery-less system validation; current limited to IREG. |
Applications
| USB-Powered Portable Charger | Bluetooth Headset Battery Management |
|---|---|
|
Use Scenario: Charging a 3.7 V, 300 mAh Li-polymer battery from a 5 V USB port in a compact wearable form factor. IC Role / Device Role / Timing Role: Stand-alone linear charge controller managing CC/CV profile, safety timers, and thermal cutoff - no host MCU required. Use Value: Enables full-charge in <90 minutes with 4.20 V precision regulation and automatic EOC detection, eliminating risk of overcharge in unattended use. |
Use Scenario: Integrated battery charging in a battery-powered Bluetooth headset with temperature monitoring during travel. IC Role / Device Role / Timing Role: Autonomous charge manager with NTC-based thermal qualification and dual-status LED feedback. Use Value: Prevents charging outside -10°C to +45°C operating range using factory-trimmed 1.23 V / 0.25 V THERM thresholds, ensuring cell longevity and safety compliance. |
| Digital Camera Power System | Personal Data Assistant (PDA) Charger |
|
Use Scenario: Recharging a 3.7 V, 1200 mAh Li-ion pack in a DSLR grip accessory powered from a wall adapter. IC Role / Device Role / Timing Role: High-current (1 A) linear charger with thermal foldback and reverse discharge protection during standby. Use Value: Delivers 95%+ efficiency at 500 mA load while limiting reverse leakage to <0.25 µA when VDD is removed - preserving battery runtime between uses. |
Use Scenario: Embedded charging solution in a legacy PDA requiring reliable, low-noise power delivery with minimal external components. IC Role / Device Role / Timing Role: Single-chip CC/CV controller with integrated current sense, UVLO, and automatic recharge. Use Value: Eliminates need for external op-amps or discrete MOSFETs; achieves <100 µVPP output ripple at 10 kHz due to 58 dB PSRR - critical for analog sensor subsystems. |
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-2ACI/OT | Single-input SOT-23-5 package; fixed 4.20 V regulation; max 500 mA; no PG output or THERM input. | Lacks temperature monitoring and power-good signaling; suited only for cost-sensitive, low-current, non-thermal-critical applications. | Select when board space is extremely constrained and thermal qualification is unnecessary; requires redesign for higher current or safety features. |
| BQ24075RGTR | TI part in QFN-16; 4.20 V ±0.5%; 1.5 A max; integrated LDO; I2C interface; different pinout and enable logic. | Supports host-controlled charging profiles and dynamic input current limiting; not pin-compatible and requires firmware integration. | Choose when system-level control, higher current, or adaptive input sourcing is needed; not a drop-in replacement for MCP73833-B6I/MF. |
Compared with MCP73831T-2ACI/OT, MCP73833-B6I/MF adds thermistor support, power-good signaling, and 1 A capability in DFN-10 - essential for safety-certified portable designs. Versus BQ24075RGTR, it offers simpler integration without I²C but lacks programmability and higher current headroom.
Availability
MCP73833-B6I/MF is available at Aetrix Electronics and suitable for USB chargers, Bluetooth headsets, digital cameras, and PDAs requiring stable component supply, long-term lifecycle support, and AEC-Q200–aligned reliability in consumer and industrial portable electronics.
Supply support for MCP73833-B6I/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 emphasis on embedded control and energy-efficient solutions.
The MCP73833-B6I/MF belongs to Microchip's dedicated linear battery charge management product line, designed specifically for space-constrained, cost-sensitive portable Li-ion/Li-polymer applications requiring autonomous, safe, and USB-compliant charging.
FAQ
What is the factory-set voltage regulation for MCP73833-B6I/MF?
The MCP73833-B6I/MF is configured for 4.20 V ±0.75% constant-voltage regulation - the standard termination voltage for single-cell Li-ion and Li-polymer batteries. This value is laser-trimmed at wafer test and cannot be adjusted externally; other variants (e.g., MCP73833-A6I/MF) offer 4.35 V or 4.40 V options.
How is charge current programmed on MCP73833-B6I/MF?
Charge current is set by connecting a resistor (RPROG) from the PROG pin to VSS. For MCP73833-B6I/MF, IREG = 1000 V / RPROG (with RPROG in kΩ and IREG in mA). A 1.0 kΩ resistor yields 1000 mA; a 10 kΩ resistor yields 100 mA. The PROG pin must not float - doing so disables the MCP73833-B6I/MF and limits reverse discharge to <2 µA.
Does MCP73833-B6I/MF support battery temperature monitoring?
Yes, MCP73833-B6I/MF includes a dedicated THERM pin with a 50 µA ±6% current source for biasing 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 if out-of-range - a critical safety feature for MCP73833-B6I/MF deployments in consumer wearables and medical devices.
What happens when input power is removed from MCP73833-B6I/MF?
When VDD falls below the UVLO stop threshold (~3.45 V), MCP73833-B6I/MF enters shutdown mode: STAT1 and STAT2 go high-impedance, PG goes high-impedance, and reverse discharge current is limited to <2 µA. The device automatically powers down to prevent battery drain - a core design feature of the MCP73833-B6I/MF architecture.
Can MCP73833-B6I/MF operate without a battery connected?
Yes - MCP73833-B6I/MF supports system test (LDO) mode. By driving the THERM pin above (VDD – 100 mV) with no battery attached, it regulates VBAT to the factory-set 4.20 V and supplies up to the programmed IREG current. This allows functional validation of downstream circuitry before battery integration, leveraging the same regulation accuracy as normal charging.
MCP73833-B6I/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-B6I/MF FAQ
1.How can I place an order for MCP73833-B6I/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73833-B6I/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-B6I/MF reliable?
The price and inventory of MCP73833-B6I/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-B6I/MF is usually 5 days.
3.What payment methods are accepted for MCP73833-B6I/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73833-B6I/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73833-B6I/MF?
MCP73833-B6I/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73833-B6I/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-B6I/MF?
For technical support, including MCP73833-B6I/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73833-B6I/MF requirements.
6.How does Aetrix verify that MCP73833-B6I/MF is sourced from the original manufacturer or authorized distributors?
All MCP73833-B6I/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-B6I/MF meets industry standards.
7.What is the process for return or replacement of MCP73833-B6I/MF?
All MCP73833-B6I/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP73833-B6I/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-B6I/MF part is unused and in its original packaging.
Return procedure for MCP73833-B6I/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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