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

Microchip Technology MCP73833T-GPI/UN

Name: MCP73833T-GPI/UN
Brand: Microchip Technology
SKU: MCP73833T-GPI/UN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP73833T-GPI/UN

Manufacturer:: Microchip Technology

Category:: Battery Chargers

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

Datasheet:: MCP73833T-GPI/UN.pdf

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

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Product details

Overview

MCP73833T-GPI/UN from Microchip Technology is a stand-alone linear Li-ion/Li-polymer battery charge management controller in MSOP-10 package, integrating pass transistor, current sense, and reverse discharge protection. It delivers 4.20 V ±0.75% constant-voltage regulation, programmable up to 1 A fast-charge current via external resistor, and thermal regulation for reliability in portable USB-powered devices.

For engineers reviewing the MCP73833T-GPI/UN datasheet, MCP73833T-GPI/UN pinout, MCP73833T-GPI/UN application, or MCP73833T-GPI/UN equivalent, key selection considerations include factory-set 4.20 V regulation voltage, PG (power-good) output functionality, thermistor-based temperature monitoring with 1.23 V / 0.25 V thresholds, and UVLO with 3.55 V start threshold and 100 mV hysteresis.

Technical Context

The MCP73833T-GPI/UN implements a three-phase linear charging algorithm: preconditioning (trickle charge at 10%–100% of I_REG), constant-current fast charge (programmable 90–1100 mA), and constant-voltage regulation (4.20 V ±0.75%). It features integrated thermal regulation that reduces charge current above ~105°C to prevent die overheating while maintaining loop stability.

Digital control logic includes dual open-drain status outputs (STAT1/STAT2), a pseudo-open-drain PG signal indicating valid input power above UVLO and V_BAT, and automatic recharge triggered when battery voltage falls below 94–96.5% of V_REG. The device operates across –40°C to +85°C ambient and supports system test (LDO) mode via THERM pin override.

Key Specifications

Parameter	Value and Actual Design Meaning
V_REG (CV Mode)	4.20 V ±0.75% - Factory-trimmed reference ensures accurate full-charge termination for standard Li-ion cells without external feedback components.
Max Fast-Charge Current	1000 mA - Programmable via single R_PROG resistor (1.0 kΩ); enables compact, cost-effective 1 A charging solutions for USB-powered devices.
UVLO Start Threshold	3.55 V (typ.) - Prevents operation until input exceeds battery voltage by ≥150 mV, eliminating reverse discharge during low-input conditions.
THERM Input Bias	50 µA (47–53 µA) - Stable current source for 10 kΩ NTC thermistors; enables precise battery temperature qualification without supply ripple sensitivity.
Thermal Shutdown	150°C (±10°C hysteresis) - Hard safety cutoff independent of thermal regulation; resumes charging only after die cools to ~140°C.
PG Output Function	Pseudo-open-drain - Sinks current when V_DD > V_UVLO and V_DD > V_BAT; must be pulled up to V_DD only due to internal diode path.
Operating Temp Range	–40°C to +85°C - Fully specified performance over industrial temperature range; junction-limited to +125°C continuous operation.

Pinout & Package

MSOP-10 package (3.0 mm × 4.9 mm × 1.1 mm), exposed pad electrically connected to VSS. Pin 1 marked by dot; pin 11 (EP) is internal thermal pad requiring solder connection to PCB ground plane for thermal performance.

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 to VSS with ≥1 µF capacitor.
STAT1 / STAT2 (Pins 3,4)	Charge status indicators	Open-drain outputs; drive LEDs or microcontroller inputs; encode charge state (e.g., STAT1=LOW/STAT2=Hi-Z = charging in progress).
VSS (Pin 5)	0 V reference	Common return for battery negative, input supply, PROG resistor, and EP pad; critical for current-sense accuracy.
PROG (Pin 6)	Current regulation set	Resistor-to-VSS sets fast-charge current (I_REG = 1000 V/R_PROG); floating disables charger and limits reverse discharge to ≤2 µA.
PG (Pin 7)	Power-good indicator	MCP73833-specific pseudo-open-drain output; LOW indicates valid input power above UVLO and V_DD > V_BAT.
THERM (Pin 8)	Thermistor input	50 µA bias current source; compares voltage against 1.23 V (high-temp trip) and 0.25 V (low-temp trip); enables safe charging within battery temp limits.
VBAT (Pins 9,10)	Battery charge control output	Drain of internal P-MOSFET pass transistor; connects directly to battery positive; bypass to VSS with ≥4.7 µF for >250 mA loads.

Key Features

Feature	Design Value
Integrated P-MOSFET pass transistor	300 mΩ typical R_DS(ON) at 105°C - Eliminates external high-side switch and associated gate-drive complexity in space-constrained designs.
Programmable preconditioning	10%–100% of I_REG at 66.5%–75% of V_REG - Safely recovers deeply discharged Li-ion cells before fast-charge initiation.
Automatic recharge threshold	94.0%–96.5% of V_REG - Maintains battery at full capacity without user intervention; avoids under-voltage stress during system use.
System test (LDO) mode	Regulated V_BAT output at 4.20 V with current limit matching I_REG - Enables battery-less system validation using same hardware footprint.
Reverse discharge protection	<0.25 µA leakage when V_DD < V_BAT - Prevents battery drain through input port during system standby or power-off states.

Applications

USB-Powered Portable Devices	Li-ion Battery Backup Systems
Use Scenario: Charging smartphones, Bluetooth headsets, and digital cameras 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, thermal foldback, and USB compliance (e.g., current limiting, V_UVLO margin). Use Value: Single-chip solution eliminates discrete MOSFET, current-sense amp, and comparator; reduces BOM count and layout area by >40% vs. discrete alternatives.	Use Scenario: Providing seamless backup power to real-time clocks, SRAM, or microcontrollers during main power loss. IC Role / Device Role / Timing Role: Low-quiescent-current charger maintaining battery at 4.20 V with automatic top-up and deep-discharge recovery. Use Value: 150 µA typical standby current and <2 µA reverse leakage ensure >1-year battery hold-up time without external enable control.
Wearable Health Monitors	Industrial Handheld Terminals
Use Scenario: Recharging compact Li-polymer batteries in fitness trackers and ECG patches where size, thermal safety, and battery longevity are critical. IC Role / Device Role / Timing Role: Thermistor-monitored charger enforcing 0°C–45°C charge window and terminating at 5% I_REG to minimize cell stress. Use Value: Factory-calibrated 1.23 V / 0.25 V THERM thresholds eliminate calibration overhead; ±0.75% V_REG tolerance extends cycle life beyond 500 cycles.	Use Scenario: Supporting ruggedized field equipment with wide ambient temperature (-40°C to +85°C) and intermittent USB or wall-adapter charging. IC Role / Device Role / Timing Role: Industrial-grade charger delivering reliable 1 A charge with thermal regulation, UVLO hysteresis, and robust ESD protection (≥4 kV HBM). Use Value: DFN-10 and MSOP-10 packaging options allow drop-in replacement between thermal and space-optimized layouts; 41°C/W θ_JA (DFN) enables 1 A operation without heatsink.

USB-Powered Portable Devices

Li-ion Battery Backup Systems

Use Scenario: Charging smartphones, Bluetooth headsets, and digital cameras 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, thermal foldback, and USB compliance (e.g., current limiting, V_UVLO margin).

Use Value: Single-chip solution eliminates discrete MOSFET, current-sense amp, and comparator; reduces BOM count and layout area by >40% vs. discrete alternatives.

Use Scenario: Providing seamless backup power to real-time clocks, SRAM, or microcontrollers during main power loss.

IC Role / Device Role / Timing Role: Low-quiescent-current charger maintaining battery at 4.20 V with automatic top-up and deep-discharge recovery.

Use Value: 150 µA typical standby current and <2 µA reverse leakage ensure >1-year battery hold-up time without external enable control.

Wearable Health Monitors

Industrial Handheld Terminals

Use Scenario: Recharging compact Li-polymer batteries in fitness trackers and ECG patches where size, thermal safety, and battery longevity are critical.

IC Role / Device Role / Timing Role: Thermistor-monitored charger enforcing 0°C–45°C charge window and terminating at 5% I_REG to minimize cell stress.

Use Value: Factory-calibrated 1.23 V / 0.25 V THERM thresholds eliminate calibration overhead; ±0.75% V_REG tolerance extends cycle life beyond 500 cycles.

Use Scenario: Supporting ruggedized field equipment with wide ambient temperature (-40°C to +85°C) and intermittent USB or wall-adapter charging.

IC Role / Device Role / Timing Role: Industrial-grade charger delivering reliable 1 A charge with thermal regulation, UVLO hysteresis, and robust ESD protection (≥4 kV HBM).

Use Value: DFN-10 and MSOP-10 packaging options allow drop-in replacement between thermal and space-optimized layouts; 41°C/W θ_JA (DFN) enables 1 A operation without heatsink.

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 status output (STAT), no PG pin, DFN-8 package, fixed 4.20 V regulation, max 500 mA charge current.	Lacks power-good indication and dual-status signaling; lower current rating limits use in high-capacity battery systems.	Select when board space is extremely constrained and PG/STAT2 signals are unnecessary; verify thermal derating for >500 mA loads.
BQ24075RGTR	TI part with integrated LDO, I²C interface, and dynamic power-path management; 4.2 V regulation, 1.5 A max current.	Requires firmware configuration and external I²C pull-ups; adds system-level control but increases design complexity and BOM count.	Choose when system-level battery health reporting or simultaneous system load + battery charging is required; not suitable for pin-compatible replacement.

Compared with MCP73831T-2DCI/OT, the MCP73833T-GPI/UN provides higher current capability, dual status outputs, and PG signaling for simpler host integration; compared with BQ24075RGTR, it offers zero-firmware, analog-only operation ideal for cost-sensitive, resource-constrained embedded systems.

Availability

MCP73833T-GPI/UN is available at Aetrix Electronics and suitable for USB chargers, wearable electronics, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MCP73833T-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 leading provider of microcontrollers, analog, and Flash-IP solutions, emphasizing reliability, long-term product availability, and embedded system integration.

The MCP73833/4 family is designed specifically for space- and cost-sensitive Li-ion/Li-polymer charging applications, delivering fully integrated linear charge control with minimal external components and industrial-grade thermal and electrical robustness.

FAQ

What is the factory-set regulation voltage for MCP73833T-GPI/UN?

The MCP73833T-GPI/UN has a factory-trimmed constant-voltage regulation of 4.20 V ±0.75%, optimized for standard single-cell Li-ion and Li-polymer batteries. This value is fixed and cannot be adjusted externally; other variants in the MCP73833/4 family offer 4.35 V, 4.40 V, or 4.50 V options, but MCP73833T-GPI/UN is specifically the 4.20 V version.

Does MCP73833T-GPI/UN support thermistor-based temperature monitoring?

Yes, MCP73833T-GPI/UN includes a dedicated THERM pin with a precision 50 µA (47–53 µA) current source for biasing standard 10 kΩ NTC thermistors. It compares the resulting voltage against factory-set thresholds of 1.23 V (upper trip) and 0.25 V (lower trip) to suspend charging outside safe battery temperature ranges.

How is charge current programmed on MCP73833T-GPI/UN?

Charge current is set using a single resistor (R_PROG) from the PROG pin to VSS, calculated as I_REG = 1000 V / R_PROG (with R_PROG in kΩ and I_REG in mA). For example, a 1.0 kΩ resistor yields ~1000 mA fast-charge current. Preconditioning and termination currents scale ratiometrically with this value based on device option settings.

What is the function of the PG pin on MCP73833T-GPI/UN?

The PG (Power Good) pin on MCP73833T-GPI/UN is a pseudo-open-drain output that goes LOW when V_DD exceeds the UVLO threshold (≥3.55 V) and remains above the battery voltage (V_DD > V_BAT). It must be pulled up only to V_DD due to an internal diode path; connecting to any other rail may cause malfunction or damage.

Can MCP73833T-GPI/UN operate without a battery connected?

Yes, MCP73833T-GPI/UN supports system test (LDO) mode: driving the THERM pin above (V_DD – 100 mV) with no battery connected configures it as a low-dropout regulator delivering 4.20 V at up to the programmed I_REG current. This allows functional validation of downstream circuitry without a battery present.

MCP73833T-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

MCP73833T-GPI/UN FAQ

1.How can I place an order for MCP73833T-GPI/UN through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP73833T-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 MCP73833T-GPI/UN reliable?

The price and inventory of MCP73833T-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 MCP73833T-GPI/UN is usually 5 days.

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MCP73833T-GPI/UN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP73833T-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 MCP73833T-GPI/UN?

For technical support, including MCP73833T-GPI/UN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP73833T-GPI/UN requirements.

6.How does Aetrix verify that MCP73833T-GPI/UN is sourced from the original manufacturer or authorized distributors?

All MCP73833T-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 MCP73833T-GPI/UN meets industry standards.

7.What is the process for return or replacement of MCP73833T-GPI/UN?

All MCP73833T-GPI/UN units undergo pre-shipment inspection (PSI). If there is an issue with MCP73833T-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 MCP73833T-GPI/UN part is unused and in its original packaging.

Return procedure for MCP73833T-GPI/UN:

1.Submit a request within 90 days.

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

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