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Microchip Technology MCP73834-B6I/MF
- Part No.:
- MCP73834-B6I/MF
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MCP73834-B6I/MF.pdf
- Description:
- IC BATT CONTRL LI-ION 1CEL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,065
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Product details
Overview
MCP73834-B6I/MF from Microchip Technology is a stand-alone linear Li-ion/Li-polymer charge management controller in a 10-lead DFN-10 (3 mm × 3 mm) package, featuring 4.20 V ±0.75% constant-voltage regulation, programmable fast-charge current up to 1000 mA via external PROG resistor, integrated thermal regulation, and MCP73834-specific timer enable (TE) input for safety timer control. It enables USB-compliant charging in space-constrained portable devices.
For engineers reviewing the MCP73834-B6I/MF datasheet, MCP73834-B6I/MF pinout, MCP73834-B6I/MF application, or MCP73834-B6I/MF equivalent, key selection considerations include its TE input functionality (distinguishing it from MCP73833), factory-set 4.20 V regulation, DFN-10 thermal performance (θJA = 41 °C/W), and precise preconditioning/termination current ratios tied to PROG resistance.
Technical Context
The MCP73834-B6I/MF implements a three-phase linear charging algorithm-preconditioning (trickle), constant-current fast charge, and constant-voltage regulation-with factory-configured thresholds: 66.5% VREG precondition voltage, 5% IREG termination current ratio, and 94.0% VREG automatic recharge threshold. Its internal P-channel MOSFET pass transistor exhibits 300 mΩ typical RDS(on) at VDD = 3.75 V and TJ = 105 °C.
Thermal regulation dynamically reduces charge current above ~105 °C to prevent overheating, while independent die temperature monitoring triggers shutdown at 150 °C with 10 °C hysteresis. The TE pin (Pin 7) provides logic-level (1.8 V compatible) enable/disable control of the internal safety timer, a defining functional difference versus the MCP73833's PG output on the same pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VREG | 4.20 V ±0.75% - Factory-trimmed regulation voltage for single-cell Li-ion batteries; ensures safe full-charge termination without overvoltage risk. |
| Max Fast Charge Current | 1000 mA - Achieved with 1.0 kΩ PROG-to-VSS resistor; supports high-capacity portable battery packs. |
| Precondition Threshold | 66.5% of VREG - Enables safe trickle-charge recovery of deeply depleted cells below ~2.79 V. |
| Charge Termination Ratio | 5% of IREG - Precisely halts charging when current drops to 50 mA (at 1 A setting), preventing overcharge. |
| Thermal Shutdown | 150 °C with 10 °C hysteresis - Hard safety cutoff protecting IC and battery under sustained overload or poor PCB thermal design. |
| Package Thermal Resistance | θJA = 41 °C/W (DFN-10) - Enables higher continuous power dissipation than MSOP-10 (113 °C/W), critical for compact USB-powered designs. |
| Timer Enable Input (TE) | 1.8 V logic-compatible - Allows host MCU to suspend safety timer during system load sharing, unique to MCP73834 variant. |
Pinout & Package
Package: DFN-10 (3 mm × 3 mm) with exposed thermal pad (EP) electrically connected to VSS. Requires soldering EP to PCB ground plane for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1,2) | Battery management input supply | Dual-input configuration accepts 3.75–6 V; UVLO activates below 3.4 V (start) / 3.3 V (stop); powers all internal circuitry. |
| STAT1, STAT2 (Pins 3,4) | Open-drain charge status outputs | Drive LEDs or microcontroller inputs: STAT1 = low during charge, STAT2 = low at end-of-charge; both high-impedance in shutdown. |
| VSS (Pin 5) | 0 V reference | Common return for battery negative, input supply, PROG resistor, and EP; must be low-impedance ground path. |
| PROG (Pin 6) | Current regulation set and enable | Resistor to VSS sets fast charge current (IREG = 1000 V/RPROG); floating disables charging and limits reverse discharge to <2 µA. |
| TE (Pin 7) | Timer enable input | Logic-low enables internal safety timer; logic-high disables it - distinguishes MCP73834 from MCP73833's PG function on this pin. |
| THERM (Pin 8) | Thermistor bias and monitoring | 50 µA current source drives NTC/PTC thermistor; compares voltage to 1.23 V / 0.25 V thresholds for temperature fault detection. |
| VBAT (Pins 9,10) | Battery charge control output | Drain of internal P-MOSFET; connects directly to battery positive; requires ≥1 µF ceramic bypass capacitor for loop stability. |
| EP (Pin 11) | Exposed thermal pad | Internally tied to VSS; must be soldered to PCB ground plane to achieve θJA = 41 °C/W and prevent thermal shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated pass transistor | Eliminates external MOSFET and gate driver, reducing BOM count and PCB area in ultra-compact USB chargers. |
| Programmable safety timer with TE control | Enables dynamic timer suspension during system load sharing-critical for battery+system power architectures. |
| Factory-set 4.20 V regulation | Guarantees compliance with standard Li-ion cell specifications without external feedback resistors or calibration. |
| Reverse discharge protection | Blocks battery-to-input leakage (<2 µA) when VDD is absent, preserving battery charge during device standby. |
| Thermistor-based temperature monitoring | Supports JEITA-compliant charging profiles via dual-threshold (1.23 V / 0.25 V) comparator with 1.3 ms filter time. |
| System test (LDO) mode | Allows VBAT to regulate at VREG without battery connected-enabling system validation and debug before battery integration. |
Applications
| USB-Powered Portable Devices | Wearable Health Monitors |
|---|---|
|
Use Scenario: Charging compact Bluetooth earbuds or smartwatches from USB 2.0 ports with strict 500 mA current limits. IC Role / Device Role / Timing Role: Stand-alone linear charger managing CC/CV profile, UVLO, and thermal regulation without MCU intervention. Use Value: DFN-10 footprint and integrated pass transistor enable <30 mm² total solution size; 4.20 V regulation ensures cell longevity. |
Use Scenario: Recharging small-form-factor pulse oximeters or ECG patches using coin-cell–sized Li-polymer batteries. IC Role / Device Role / Timing Role: Battery management controller providing preconditioning for deep-discharge recovery and automatic recharge on voltage sag. Use Value: 66.5% VREG precondition threshold safely revives cells down to ~2.79 V; 5% termination ratio prevents capacity loss. |
| Industrial Handheld Scanners | USB-C Power Delivery Accessories |
|
Use Scenario: Enabling hot-swap battery operation in rugged barcode scanners where battery removal occurs mid-use. IC Role / Device Role / Timing Role: Linear charger with reverse discharge protection and automatic power-down when VDD is removed. Use Value: Sub-2 µA reverse leakage preserves battery during field swaps; TE pin allows host MCU to disable timer during active scanning. |
Use Scenario: Integrating battery backup into USB-C PD sink accessories like HDMI adapters or docking stations. IC Role / Device Role / Timing Role: Secondary charging controller accepting regulated 5 V from PD controller, delivering precise 4.20 V to Li-ion pack. Use Value: PSRR of 58 dB (10 Hz–1 kHz) suppresses PD converter ripple; LDO mode validates system operation pre-battery install. |
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 |
|---|---|---|---|
| MCP73833-FCI/MF | Replaces TE pin with PG (power-good) open-drain output; identical 4.20 V regulation, PROG programming, and thermal specs. | Lacks timer enable functionality; suited for simpler chargers where host control of safety timer is unnecessary. | Select MCP73833-FCI/MF only if PG status reporting to host MCU is required and timer suspension is not needed. |
| BQ24075RGTR | TI part with 4.2 V regulation, 1.5 A max charge current, and integrated FET; lacks TE input but adds input voltage regulation and dynamic power path management. | Targets higher-current applications and systems requiring simultaneous system load + battery charging from single input. | Choose BQ24075RGTR when >1 A charge current or power-path management is required; MCP73834-B6I/MF offers tighter thermal spec (41 °C/W vs. 60 °C/W). |
Compared with MCP73833-FCI/MF, the MCP73834-B6I/MF trades PG status for TE control-enabling adaptive timer behavior in complex power architectures-while maintaining identical regulation accuracy and thermal performance. Against BQ24075RGTR, it delivers superior thermal efficiency in DFN-10 but omits power-path management.
Availability
MCP73834-B6I/MF is available at Aetrix Electronics and suitable for USB-powered portable devices, wearable health monitors, industrial handheld scanners, and USB-C power delivery accessories requiring stable component supply across production lifecycles.
Supply support for MCP73834-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 leading provider of microcontrollers, analog components, and interface ICs, emphasizing reliability, long-term product availability, and embedded system integration.
The MCP73833/34 family is designed specifically for cost-sensitive, space-constrained Li-ion/Li-polymer charging applications-delivering complete linear charge control with minimal external components and robust safety features.
FAQ
What is the factory-set regulation voltage for MCP73834-B6I/MF?
The MCP73834-B6I/MF has a factory-trimmed constant-voltage regulation of 4.20 V ±0.75%, optimized for standard single-cell Li-ion batteries. This value is fixed and cannot be adjusted externally-it is distinct from other variants in the MCP73833/34 family offering 4.35 V, 4.40 V, or 4.50 V options.
How does the TE pin on MCP73834-B6I/MF differ from the PG pin on MCP73833?
The TE (Timer Enable) pin on MCP73834-B6I/MF is a logic input that disables the internal safety timer when driven high, whereas the PG (Power Good) pin on MCP73833 is an output indicating valid input supply. This functional distinction means MCP73834-B6I/MF supports adaptive timer control in multi-load systems, unlike the status-reporting role of PG.
What is the maximum charge current achievable with MCP73834-B6I/MF?
The MCP73834-B6I/MF supports a maximum fast-charge current of 1000 mA, achieved by connecting a 1.0 kΩ resistor between the PROG pin and VSS. Current scales inversely with resistance per IREG = 1000 V / RPROG, and thermal regulation reduces current above ~105 °C to maintain reliability.
Does MCP73834-B6I/MF require external MOSFETs for charging?
No, the MCP73834-B6I/MF integrates a P-channel MOSFET pass transistor with 300 mΩ typical RDS(on), eliminating the need for external switching elements. This integration reduces bill-of-materials cost and PCB footprint-key for ultra-compact USB charger designs where space is constrained.
What thermal performance can be expected from MCP73834-B6I/MF in its DFN-10 package?
In the DFN-10 (3 mm × 3 mm) package, the MCP73834-B6I/MF achieves a junction-to-ambient thermal resistance (θJA) of 41 °C/W on a 4-layer JEDEC-standard board with natural convection. This is significantly lower than the MSOP-10 variant (113 °C/W), enabling higher continuous power handling and reduced risk of thermal shutdown in dense layouts.
MCP73834-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)
MCP73834-B6I/MF FAQ
1.How can I place an order for MCP73834-B6I/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73834-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 MCP73834-B6I/MF reliable?
The price and inventory of MCP73834-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 MCP73834-B6I/MF is usually 5 days.
3.What payment methods are accepted for MCP73834-B6I/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73834-B6I/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73834-B6I/MF?
MCP73834-B6I/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73834-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 MCP73834-B6I/MF?
For technical support, including MCP73834-B6I/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73834-B6I/MF requirements.
6.How does Aetrix verify that MCP73834-B6I/MF is sourced from the original manufacturer or authorized distributors?
All MCP73834-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 MCP73834-B6I/MF meets industry standards.
7.What is the process for return or replacement of MCP73834-B6I/MF?
All MCP73834-B6I/MF units undergo pre-shipment inspection (PSI). If there is an issue with MCP73834-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 MCP73834-B6I/MF part is unused and in its original packaging.
Return procedure for MCP73834-B6I/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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