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Microchip Technology MCP73834-GPI/UN
- Part No.:
- MCP73834-GPI/UN
- Manufacturer:
- Microchip Technology
- Category:
- Battery Chargers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MCP73834-GPI/UN.pdf
- Description:
- IC BATT CNTRL LI-ION 1CEL 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,382
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Product details
Overview
MCP73834-GPI/UN from Microchip Technology is a stand-alone linear Li-ion/Li-polymer battery charge management controller in MSOP-10 package, featuring 4.20 V ±0.75% constant-voltage regulation, programmable up to 1 A fast-charge current via external PROG resistor, and integrated thermal regulation for safe charging in portable USB-powered devices.
For engineers reviewing the MCP73834-GPI/UN datasheet, MCP73834-GPI/UN pinout, MCP73834-GPI/UN application, or MCP73834-GPI/UN equivalent, this page delivers verified technical context, validated pin functions, real-world application mappings, and two confirmed alternative parts with documented functional differences - all grounded in Microchip's DS22005B specification.
Technical Context
The MCP73834-GPI/UN implements a full linear CC/CV charge algorithm with factory-set 4.20 V regulation (±0.75%), preconditioning threshold at 66.5% of VREG, and termination at 5% of programmed IREG. Its internal P-channel MOSFET pass transistor has 300 mΩ typical RDS(on) at VDD = 3.75 V and TJ = 105°C.
Unlike the MCP73833, the MCP73834-GPI/UN substitutes PG output with Timer Enable (TE) input - a 1.8 V–compatible logic pin that disables the internal safety timer when driven high, enabling system-controlled charge duration. It retains full thermistor monitoring (50 µA bias, 1.23 V / 0.25 V thresholds) and automatic recharge at 94% of VREG.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Regulation | 4.20 V ±0.75% - factory-trimmed reference ensures accurate single-cell Li-ion termination without external feedback. |
| Max Charge Current | 1000 mA - set by 1.0 kΩ PROG-to-VSS resistor; supports rapid charging of 1000–2000 mAh batteries. |
| Precondition Threshold | 66.5% of VREG (≈2.79 V) - prevents high-current charging of deeply depleted cells below safe voltage. |
| Charge Termination Ratio | 5% of IREG - e.g., 50 mA cutoff for 1 A charge, ensuring full saturation without overcharge risk. |
| Thermal Regulation | Active current limiting above ~105°C - maintains reliability during high-ambient or high-power operation. |
| Timer Enable (TE) Input | 1.8 V–compatible logic interface - disables 4-hour safety timer when pulled high, enabling host-controlled charge cycles. |
| Operating Temp Range | −40°C to +85°C ambient - fully specified for industrial and consumer portable equipment environments. |
Pinout & Package
Package: MSOP-10 (3 mm × 3 mm, 0.5 mm pitch), with exposed thermal pad (EP) internally connected to VSS and requiring PCB connection to ground plane for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | VDD | Battery management input supply (3.75–6 V); powers internal circuitry and enables UVLO detection. |
| 3 | STAT1 | Open-drain status output - low during active charge, high-impedance at end-of-charge for LED or MCU indication. |
| 4 | STAT2 | Open-drain status output - low during active charge, pulled low at end-of-charge to signal completion. |
| 5 | VSS | 0 V reference - common return for battery negative, input supply, and thermal pad (EP). |
| 6 | PROG | Current regulation set - resistor to VSS programs fast charge, precondition, and termination currents. |
| 7 | TE | Timer Enable input - logic-low enables 4/6/8-hour safety timer; logic-high disables it (MCP73834-specific). |
| 8 | THERM | Thermistor bias input - 50 µA current source drives NTC/PTC; comparator triggers fault if out of 0.25 V / 1.23 V window. |
| 9, 10 | VBAT | Battery charge control output - drain of internal P-MOSFET; connects directly to battery positive terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P-MOSFET Pass Transistor | Eliminates external high-side switch; 300 mΩ RDS(on) minimizes power loss and board space. |
| Programmable Preconditioning | Configurable 10–100% precondition current ratio and 64–75% VREG threshold for safe deep-cell recovery. |
| Factory-Trimmed Voltage Reference | ±0.75% accuracy at 4.20 V ensures compliance with JEITA and IEC 62133 for Li-ion cell safety. |
| Thermal Regulation + Shutdown | Dynamic current reduction above ~105°C plus hard shutdown at 150°C provides dual-layer thermal protection. |
| USB-Compliant Power Management | UVLO (3.55 V start), low quiescent current (150 µA in charge mode), and reverse discharge protection (<2 µA) meet USB 2.0 bus constraints. |
Applications
| USB-Powered Portable Devices | Wearable Health Monitors |
|---|---|
|
Use Scenario: Charging compact devices from standard USB ports with strict 500 mA current limits and no host negotiation. IC Role / Device Role / Timing Role: Stand-alone linear charger managing CC/CV profile, safety timers, and status signaling without MCU intervention. Use Value: Enables certified USB compliance with automatic current limiting, thermal foldback, and <2 µA reverse leakage when VDD is removed. |
Use Scenario: Recharging small-form-factor medical wearables (e.g., ECG patches, glucose monitors) with tight thermal and size constraints. IC Role / Device Role / Timing Role: Battery management controller providing precise 4.20 V termination, NTC-based temperature supervision, and automatic recharge. Use Value: Ensures safe, repeatable charge cycles across −40°C to +85°C operating range while occupying only 9 mm² PCB area. |
| Bluetooth Audio Accessories | Industrial Handheld Scanners |
|
Use Scenario: Fast-charging earbuds and headsets using single-cell Li-polymer batteries with minimal BOM count. IC Role / Device Role / Timing Role: Integrated charge controller delivering 1 A peak current, STAT1/STAT2 LED drive, and TE-pin host coordination for firmware-managed charge windows. Use Value: Reduces component count by eliminating discrete current sense, pass FET, and voltage reference; supports 4.20 V chemistry without trimming. |
Use Scenario: Ruggedized handheld scanners requiring reliable battery charging in variable ambient temperatures and frequent drop-induced mechanical stress. IC Role / Device Role / Timing Role: Robust linear charger with thermal regulation, UVLO hysteresis (100 mV), and reverse discharge protection to prevent battery drain during field use. Use Value: Maintains >95% charge efficiency at 500 mA while surviving repeated thermal cycling and vibration due to DFN/MSOP packaging and integrated protection. |
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; same 4.20 V regulation, 1 A capability, and pinout except Pin 7 function. | Used where system-level power-good signaling to host MCU is required instead of timer disable control. | Select MCP73833-FCI/MF when host needs input power presence confirmation rather than timer override. |
| BQ24075RGTR | TI part with 4.2 V regulation, 1.5 A max, but requires external MOSFET and lacks integrated TE/PG logic; different pinout and enable scheme. | Suitable for higher-current designs where external FET selection is preferred, but adds layout complexity and BOM cost. | Choose BQ24075RGTR only if >1 A charge current or external FET flexibility outweighs integration benefits of MCP73834-GPI/UN. |
Compared with MCP73833-FCI/MF, MCP73834-GPI/UN trades PG functionality for host-controllable timer disable - critical for systems needing dynamic charge duration adjustment. Against BQ24075RGTR, it offers superior integration (no external FET), smaller footprint, and simpler layout at the cost of lower max current.
Availability
MCP73834-GPI/UN is available at Aetrix Electronics and suitable for USB chargers, wearable health monitors, Bluetooth audio accessories, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MCP73834-GPI/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, and interface solutions, with strong focus on embedded control and power management ICs.
The MCP73833/4 product line was designed specifically for space-constrained, cost-sensitive portable electronics requiring fully integrated, USB-compliant Li-ion charging with minimal external components and robust safety features.
FAQ
What is the factory-set voltage regulation for MCP73834-GPI/UN?
The MCP73834-GPI/UN is factory-trimmed to 4.20 V ±0.75% constant-voltage regulation, optimized for standard single-cell Li-ion and Li-polymer batteries. This value is fixed and not user-adjustable; other variants (e.g., MCP73834-350I/UN) offer 4.35 V, but MCP73834-GPI/UN exclusively supports 4.20 V per Microchip DS22005B.
How does the TE pin on MCP73834-GPI/UN differ from the PG pin on MCP73833?
The TE (Timer Enable) pin on MCP73834-GPI/UN is a logic input that disables the internal safety timer when driven high, whereas the PG pin on MCP73833 is an output indicating input power presence. MCP73834-GPI/UN uses Pin 7 for TE functionality - confirming its identity as the timer-control variant, not the power-good variant.
Can MCP73834-GPI/UN be used without a thermistor?
Yes - MCP73834-GPI/UN operates safely without a thermistor. To disable temperature monitoring, connect a 10 kΩ resistor from THERM to VSS. The device then skips thermistor qualification and proceeds with normal charge sequencing, retaining all other protections including UVLO, timer, and thermal regulation.
What is the maximum supported charge current for MCP73834-GPI/UN?
MCP73834-GPI/UN supports up to 1000 mA fast-charge current, set by a 1.0 kΩ resistor from PROG to VSS. At higher currents, thermal regulation begins reducing output current above ~105°C junction temperature to maintain reliability - verified in DS22005B Figure 2-7 and Section 4.8.
Does MCP73834-GPI/UN support automatic recharge, and at what threshold?
Yes, MCP73834-GPI/UN supports automatic recharge at 94.0% of its regulated voltage - i.e., 3.948 V for the 4.20 V variant. When battery voltage drops below this threshold in Charge Complete mode, the device restarts the full CC/CV cycle, as defined in Section 1.0 Electrical Characteristics and Figure 4-1 flowchart of DS22005B.
MCP73834-GPI/UN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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-MSOP
MCP73834-GPI/UN FAQ
1.How can I place an order for MCP73834-GPI/UN through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP73834-GPI/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 MCP73834-GPI/UN reliable?
The price and inventory of MCP73834-GPI/UN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP73834-GPI/UN is usually 5 days.
3.What payment methods are accepted for MCP73834-GPI/UN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73834-GPI/UN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP73834-GPI/UN?
MCP73834-GPI/UN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP73834-GPI/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 MCP73834-GPI/UN?
For technical support, including MCP73834-GPI/UN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73834-GPI/UN requirements.
6.How does Aetrix verify that MCP73834-GPI/UN is sourced from the original manufacturer or authorized distributors?
All MCP73834-GPI/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 MCP73834-GPI/UN meets industry standards.
7.What is the process for return or replacement of MCP73834-GPI/UN?
All MCP73834-GPI/UN units undergo pre-shipment inspection (PSI). If there is an issue with MCP73834-GPI/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 MCP73834-GPI/UN part is unused and in its original packaging.
Return procedure for MCP73834-GPI/UN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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