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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Battery Chargers

Microchip Technology MCP73834T-GPI/UN

Name: MCP73834T-GPI/UN
Brand: Microchip Technology
SKU: MCP73834T-GPI/UN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP73834T-GPI/UN

Manufacturer:: Microchip Technology

Category:: Battery Chargers

Package:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Datasheet:: MCP73834T-GPI/UN.pdf

Description:: IC BATT CNTRL LI-ION 1CEL 10MSOP

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Product details

Overview

MCP73834T-GPI/UN from Microchip Technology is a stand-alone linear Li-ion/Li-polymer charge management controller in MSOP-10 package, featuring 4.20 V ±0.75% constant-voltage regulation, programmable 100 mA–1 A fast-charge current via external resistor, and integrated thermal regulation with 150°C shutdown threshold. It delivers preconditioning, automatic recharge, dual status outputs (STAT1/STAT2), and thermistor-based temperature monitoring for USB-powered portable devices.

For engineers reviewing the MCP73834T-GPI/UN datasheet, MCP73834T-GPI/UN pinout, MCP73834T-GPI/UN application, or MCP73834T-GPI/UN equivalent, this page provides verified technical context, exact pin functions, real-world application mappings, and validated alternative options for battery charging subsystem design and BOM optimization.

Technical Context

The MCP73834T-GPI/UN implements a constant-current/constant-voltage (CC/CV) charge algorithm with factory-set 4.20 V regulation, selectable preconditioning (10–100% of I_REG), and termination at 5% of programmed current. Its internal P-channel MOSFET pass transistor features 300 mΩ typical R_DS(on), enabling efficient linear regulation up to 1 A while supporting thermal foldback above 105°C junction temperature.

Unlike the MCP73833 variant, the MCP73834T-GPI/UN substitutes Power Good (PG) output with Timer Enable (TE) input - a logic-compatible (1.8 V) control signal that disables the internal safety timer during system-load-powered charging. It retains full thermistor bias (50 µA), dual-threshold (1.23 V / 0.25 V) temperature fault detection, and UVLO with 3.55 V start/3.45 V stop thresholds and 100 mV hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Regulation Voltage	4.20 V ±0.75% - precise CV setpoint for standard single-cell Li-ion batteries; ensures safe full-charge without overvoltage stress.
Max Charge Current	1000 mA - programmable via PROG-to-VSS resistor; supports high-speed charging of 1000–2000 mAh cells in compact designs.
Thermal Shutdown	150°C ±10°C - die-level protection with 10°C hysteresis; prevents permanent damage during sustained high-power operation.
UVLO Threshold	3.55 V (start), 3.45 V (stop) - prevents operation below safe input voltage; avoids battery discharge through VDD path when supply drops.
Thermistor Bias	50 µA ±6% - stable current source for 10 kΩ NTC thermistors; enables accurate battery temperature monitoring across -40°C to +85°C ambient.
Timer Enable Input	1.8 V logic compatible - TE pin disables internal safety timer when pulled low; allows continuous charging under system load without timeout interruption.
Package	MSOP-10 (3 mm × 3 mm) - surface-mount package with exposed thermal pad (EP) tied to VSS; supports high thermal dissipation (θ_JA = 113°C/W).

Pinout & Package

MSOP-10 package with 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	Dual-input configuration accepts 3.75–6 V; powers internal circuitry and enables UVLO-controlled startup/shutdown.
STAT1, STAT2 (Pins 3, 4)	Open-drain charge status outputs	Drive LEDs or microcontroller GPIOs; encode charge state (e.g., STAT1=LOW/STAT2=HI-Z = fast charge active).
VSS (Pin 5)	0 V reference	Common return for battery negative, input supply, PROG resistor, and EP; must be low-impedance ground connection.
PROG (Pin 6)	Current regulation set and enable	Resistor to VSS sets fast charge current (I_REG = 1000 V/R_PROG); floating disables charger and limits reverse discharge to <2 µA.
TE (Pin 7)	Timer Enable input	Logic-low enables internal safety timer; logic-high disables it - critical for applications where system load shares input power with battery.
THERM (Pin 8)	Thermistor input	50 µA bias current sources external NTC; comparator triggers fault if voltage falls outside 0.25 V–1.23 V window.
VBAT (Pins 9, 10)	Battery charge control output	Drain of internal P-MOSFET; connects directly to battery anode; requires ≥1 µF ceramic bypass capacitor for stability.
EP (Pin 11)	Exposed thermal pad	Internally tied to VSS; must be soldered to PCB ground plane to achieve θ_JA = 113°C/W and sustain 1 A operation.

Key Features

Feature	Design Value
Integrated P-MOSFET pass transistor	Eliminates external high-side switch; reduces BOM count and layout area while maintaining 300 mΩ R_DS(on) at 105°C.
Programmable CC/CV charge profile	Enables precise adaptation to diverse Li-ion chemistries (e.g., 4.20 V for standard, 4.35 V for high-capacity) via part number selection - not user-configurable on MCP73834T-GPI/UN.
Thermal regulation with foldback	Automatically reduces charge current above ~105°C junction temperature; maintains reliability without requiring external thermal sensors or control loops.
Preconditioning & automatic recharge	Trickle-charges deeply depleted cells at 10–100% of I_REG; resumes charging when VBAT drops below 94–96.5% of V_REG, extending usable battery life.
System Test (LDO) mode	Activates when THERM > (VDD − 100 mV) with no battery; delivers regulated 4.20 V output up to programmed I_REG, enabling battery-less system validation.

Applications

USB-Powered Portable Devices	Wearable Health Monitors
Use Scenario: Charging compact devices like Bluetooth headsets or smartwatches from 5 V USB ports with strict inrush and thermal constraints. IC Role / Device Role / Timing Role: Stand-alone linear charger managing CC/CV profile, thermistor-based safety, and dual-status LED indication without host MCU intervention. Use Value: Enables fully autonomous charging with <2 µA reverse discharge in standby, 100% factory-trimmed 4.20 V regulation, and 1 ms comparator filtering to reject transient noise.	Use Scenario: Recharging small-form-factor wearable sensors (e.g., pulse oximeters) using coin-cell-sized Li-polymer batteries. IC Role / Device Role / Timing Role: Battery management controller providing preconditioning for deep-discharge recovery, automatic recharge at 94% V_REG, and LDO-mode system test capability. Use Value: Extends battery cycle life via precise 5% termination ratio and eliminates need for external LDO during production test by enabling system test mode.
Industrial Handheld Terminals	USB-C Accessory Chargers
Use Scenario: Field-deployed rugged terminals requiring reliable charging across -40°C to +85°C ambient with minimal external components. IC Role / Device Role / Timing Role: Primary charge controller implementing UVLO (3.55 V start), thermal shutdown (150°C), and timer-enabled safety for unattended operation. Use Value: Guarantees safe operation under extreme conditions with 4 kV HBM ESD rating, -40°C to +85°C specification, and integrated reverse discharge protection.	Use Scenario: Compact wall adapters or car chargers delivering 5 V input to single-cell Li-ion batteries in accessories like wireless earbuds cases. IC Role / Device Role / Timing Role: Linear charge IC with TE pin allowing timer disable during concurrent system load powering - essential for shared-input architectures. Use Value: Prevents premature charge termination when adapter supplies both battery and device logic, eliminating false "EOC" signals during active use.

USB-Powered Portable Devices

Wearable Health Monitors

Use Scenario: Charging compact devices like Bluetooth headsets or smartwatches from 5 V USB ports with strict inrush and thermal constraints.

IC Role / Device Role / Timing Role: Stand-alone linear charger managing CC/CV profile, thermistor-based safety, and dual-status LED indication without host MCU intervention.

Use Value: Enables fully autonomous charging with <2 µA reverse discharge in standby, 100% factory-trimmed 4.20 V regulation, and 1 ms comparator filtering to reject transient noise.

Use Scenario: Recharging small-form-factor wearable sensors (e.g., pulse oximeters) using coin-cell-sized Li-polymer batteries.

IC Role / Device Role / Timing Role: Battery management controller providing preconditioning for deep-discharge recovery, automatic recharge at 94% V_REG, and LDO-mode system test capability.

Use Value: Extends battery cycle life via precise 5% termination ratio and eliminates need for external LDO during production test by enabling system test mode.

Industrial Handheld Terminals

USB-C Accessory Chargers

Use Scenario: Field-deployed rugged terminals requiring reliable charging across -40°C to +85°C ambient with minimal external components.

IC Role / Device Role / Timing Role: Primary charge controller implementing UVLO (3.55 V start), thermal shutdown (150°C), and timer-enabled safety for unattended operation.

Use Value: Guarantees safe operation under extreme conditions with 4 kV HBM ESD rating, -40°C to +85°C specification, and integrated reverse discharge protection.

Use Scenario: Compact wall adapters or car chargers delivering 5 V input to single-cell Li-ion batteries in accessories like wireless earbuds cases.

IC Role / Device Role / Timing Role: Linear charge IC with TE pin allowing timer disable during concurrent system load powering - essential for shared-input architectures.

Use Value: Prevents premature charge termination when adapter supplies both battery and device logic, eliminating false "EOC" signals during active use.

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
MCP73833T-GPI/UN	Replaces TE pin with PG (Power Good) open-drain output; identical CC/CV, thermal, and UVLO specs.	Used where host system needs input power presence confirmation instead of timer control; not suitable for shared-load charging.	Select MCP73833T-GPI/UN only when PG signaling is required and timer disable functionality is unnecessary.
BQ24075RGTR	TI part with 4.2 V regulation, 1.5 A max current, and integrated USB current limiting (100/500 mA select); lacks TE pin and uses different thermistor interface.	Preferred for USB-compliant designs needing input current limiting and higher charge current; requires different layout and firmware handshake.	Choose BQ24075RGTR when USB enumeration compliance or >1 A charging is mandatory; avoid if TE control or Microchip ecosystem alignment is required.

Compared with MCP73833T-GPI/UN, the MCP73834T-GPI/UN trades PG signaling for TE control-enabling uninterrupted charging under system load-while BQ24075RGTR adds USB current limiting but removes the dedicated timer-enable function and changes thermistor bias architecture.

Availability

MCP73834T-GPI/UN is available at Aetrix Electronics and suitable for USB-powered portable devices, wearable health monitors, industrial handheld terminals, and USB-C accessory chargers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MCP73834T-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 devices, and battery management solutions, with global manufacturing and quality certifications including ISO 9001 and AEC-Q200 for select products.

The MCP7383x family is designed specifically for space-constrained, cost-sensitive Li-ion/Li-polymer charging applications - emphasizing integration (internal MOSFET, current sense, reverse protection), USB compliance, and robust thermal management.

FAQ

What is the factory-set regulation voltage for MCP73834T-GPI/UN?

The MCP73834T-GPI/UN is factory-trimmed to 4.20 V ±0.75% constant-voltage regulation, optimized for standard single-cell Li-ion batteries. This value is fixed per device variant and cannot be adjusted externally; other voltages (4.35 V, 4.40 V, 4.50 V) require different part numbers in the MCP73833/4 family.

How does the Timer Enable (TE) pin on MCP73834T-GPI/UN affect charge operation?

The TE pin on MCP73834T-GPI/UN disables the internal safety timer when driven high (≥2.0 V), allowing continuous charging even if the timer period expires - essential when the input supply simultaneously powers the system load and battery. When TE is low (<0.6 V), the timer operates normally and terminates charge upon expiration.

Can MCP73834T-GPI/UN be used without a thermistor?

Yes - MCP73834T-GPI/UN operates without a thermistor. To disable temperature monitoring, connect a 10 kΩ resistor from THERM to VSS. The device then skips thermistor-based fault checks but retains all other charge functions, including CC/CV regulation, preconditioning, and automatic recharge.

What is the maximum continuous charge current supported by MCP73834T-GPI/UN?

MCP73834T-GPI/UN supports up to 1000 mA continuous fast-charge current, set by a resistor from PROG to VSS (e.g., 1.0 kΩ yields ~1000 mA). At 1 A and 6 V input, thermal performance depends on PCB layout: with proper EP grounding on a 4-layer board, junction temperature remains within safe limits up to +85°C ambient.

Does MCP73834T-GPI/UN provide reverse battery discharge protection?

Yes - MCP73834T-GPI/UN integrates reverse discharge protection. When input power is removed and VDD falls below VBAT, reverse current is limited to ≤2 µA, preventing battery drain through the IC. This feature is active in all states, including shutdown and standby, and requires no external components.

MCP73834T-GPI/UN Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

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-MSOP

MCP73834T-GPI/UN FAQ

1.How can I place an order for MCP73834T-GPI/UN through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP73834T-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 MCP73834T-GPI/UN reliable?

The price and inventory of MCP73834T-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 MCP73834T-GPI/UN is usually 5 days.

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MCP73834T-GPI/UN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP73834T-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 MCP73834T-GPI/UN?

For technical support, including MCP73834T-GPI/UN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73834T-GPI/UN requirements.

6.How does Aetrix verify that MCP73834T-GPI/UN is sourced from the original manufacturer or authorized distributors?

All MCP73834T-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 MCP73834T-GPI/UN meets industry standards.

7.What is the process for return or replacement of MCP73834T-GPI/UN?

All MCP73834T-GPI/UN units undergo pre-shipment inspection (PSI). If there is an issue with MCP73834T-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 MCP73834T-GPI/UN part is unused and in its original packaging.

Return procedure for MCP73834T-GPI/UN:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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