Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Microchip Technology MCP73833T-AMI/UN

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

Compare

Part No.:: MCP73833T-AMI/UN

Manufacturer:: Microchip Technology

Category:: Battery Chargers

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

Datasheet:: MCP73833T-AMI/UN.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:13,684

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MCP73833T-AMI/UN from Microchip Technology is a stand-alone linear Li-ion/Li-polymer battery charge management controller in a 10-pin DFN (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 resistor, and integrated reverse discharge protection - designed for USB-powered portable devices including Bluetooth headsets and digital cameras.

For engineers reviewing the MCP73833T-AMI/UN datasheet, MCP73833T-AMI/UN pinout, MCP73833T-AMI/UN application, or MCP73833T-AMI/UN equivalent, key selection criteria include its factory-set 4.20 V regulation, DFN-10 thermal performance (θ_JA = 41 °C/W), dual status outputs (STAT1/STAT2), thermistor-based temperature monitoring, and PG output for input power validation.

Technical Context

The MCP73833T-AMI/UN implements a fully integrated linear charging architecture with an internal P-channel MOSFET pass transistor (R_DS(ON) = 300 mΩ), precision reference generator (1.21 V), and ratiometric current sensing. Its charge algorithm includes preconditioning (trickle charge at 7.5–100% of I_REG), fast-charge CC mode, CV regulation, automatic termination (at 3.75–25% of I_REG), and automatic recharge (at 94–96.5% of V_REG).

Thermal regulation dynamically scales charge current above ~105 °C to prevent overheating, while die-level thermal shutdown activates at 150 °C (10 °C hysteresis). The device supports system test (LDO) mode when THERM > (VDD − 100 mV), delivering regulated output at the selected V_REG with current limit set by PROG.

Key Specifications

Parameter	Value and Actual Design Meaning
Voltage Regulation	4.20 V ±0.75% - factory-trimmed for single-cell Li-ion compliance; ensures safe full-charge termination without overvoltage stress.
Max Charge Current	1000 mA - set via external PROG resistor (e.g., 1.0 kΩ); enables rapid charging of 500–2000 mAh batteries.
Thermal Resistance	θ_JA = 41 °C/W - DFN-10 package enables high-power operation in space-constrained PCB layouts without forced airflow.
Precondition Threshold	V_PTH/V_REG = 64–75% - triggers trickle charge below ~2.69 V (for 4.20 V option), safely recovering deeply discharged cells.
Charge Termination Ratio	I_TERM/I_REG = 3.75–25% - configurable end-of-charge cutoff prevents overcharging while accommodating aging or high-impedance cells.
UVLO Thresholds	V_START = 3.55 V, V_STOP = 3.45 V - 100 mV hysteresis prevents oscillation during weak-input conditions (e.g., marginal USB ports).
THERM Bias Current	50 µA ±6% - stable NTC thermistor excitation independent of VDD, enabling accurate battery temperature monitoring across supply range.

Pinout & Package

Package: 10-lead DFN (3 mm × 3 mm), exposed thermal pad (EP) electrically connected to VSS. Thermal pad must be soldered to PCB ground plane for optimal thermal performance and reliability.

Pin/Terminal	Circuit Role	Design Meaning
VDD (Pins 1, 2)	Battery management input supply	Dual-input configuration accepts 3.75–6 V; bypassed with ≥1 µF capacitor; UVLO active below 3.45 V.
STAT1 / STAT2 (Pins 3, 4)	Open-drain charge status outputs	Drive LEDs or microcontroller inputs; STAT1 = low during charge, STAT2 = low at EOC; Hi-Z in shutdown/standby.
VSS (Pin 5)	Ground reference	Common return for battery negative, input supply, and exposed thermal pad (EP); mandatory low-impedance connection.
PROG (Pin 6)	Current regulation and enable input	Resistor-to-VSS sets I_REG; floating disables charger and limits reverse discharge to <2 µA.
PG (Pin 7)	Power good pseudo-open-drain output	Active-low signal indicates VDD > UVLO threshold AND VDD > VBAT; must be pulled up only to VDD (no external supply).
THERM (Pin 8)	NTC thermistor bias and sense input	50 µA current source; compares voltage to 1.23 V / 0.25 V thresholds; fault halts charging immediately.
VBAT (Pins 9, 10)	Battery charge control output	Drain of internal P-MOSFET; connects to battery positive; requires ≥1 µF (≤250 mA) or ≥4.7 µF (≥250 mA) ceramic bypass.
EP (Pin 11)	Exposed thermal pad	Internally tied to VSS; must be soldered to PCB ground plane to achieve θ_JA = 41 °C/W and sustain 1 A operation.

Key Features

Feature	Design Value
Integrated pass transistor	P-channel MOSFET with 300 mΩ R_DS(ON) eliminates external FET, reducing BOM count and layout area in compact USB chargers.
Thermal regulation	Automatically reduces charge current above ~105 °C to maintain safe junction temperature without external sensors or firmware.
Programmable preconditioning	Configurable trickle-charge ratio (7.5–100% of I_REG) and voltage threshold (64–75% of V_REG) enables safe recovery of deeply depleted Li-ion cells.
Dual status outputs	STAT1 and STAT2 provide discrete, hardware-driven state indication (charging vs. complete) without MCU polling or GPIO overhead.
Reverse discharge protection	Blocks battery-to-input leakage (<2 µA) when VDD is absent, preserving battery charge during device standby or disconnection.

Applications

USB-Powered Portable Devices	Bluetooth Audio Accessories
Use Scenario: Charging compact consumer electronics directly from USB 2.0 ports (5 V ±5%) with strict current limits (500 mA max). IC Role / Device Role / Timing Role: Stand-alone linear charge controller managing CC/CV profile, safety timers, and status signaling without host intervention. Use Value: Enables full USB-compliant charging with no software stack, meeting USB-IF voltage regulation (±0.75%) and thermal safety requirements.	Use Scenario: Powering and charging Li-polymer batteries in wireless earbuds and headsets where board space and thermal dissipation are critical. IC Role / Device Role / Timing Role: Battery management unit providing preconditioning, thermal monitoring, and automatic recharge in ultra-small form factor. Use Value: Extends battery cycle life via precise 4.20 V regulation and prevents thermal runaway using integrated NTC interface and die-temp regulation.
Digital Imaging Equipment	Personal Data Assistants
Use Scenario: Recharging high-capacity Li-ion packs (1000–2000 mAh) in digital cameras and camcorders with minimal external components. IC Role / Device Role / Timing Role: Primary charge controller executing full CC/CV algorithm, including timer-based safety timeout and voltage-based recharge. Use Value: Delivers reliable 1 A charging with <1% load/line regulation, ensuring consistent full-charge capacity across varying ambient temperatures (−40°C to +85°C).	Use Scenario: Managing battery charging in legacy PDAs with limited PCB real estate and no dedicated charging MCU. IC Role / Device Role / Timing Role: Autonomous charge manager handling preconditioning, fast charge, CV regulation, and EOC detection in hardware. Use Value: Eliminates need for firmware-based charging logic while supporting automatic recharge at 94–96.5% V_REG, maintaining usable runtime between sync sessions.

USB-Powered Portable Devices

Bluetooth Audio Accessories

Use Scenario: Charging compact consumer electronics directly from USB 2.0 ports (5 V ±5%) with strict current limits (500 mA max).

IC Role / Device Role / Timing Role: Stand-alone linear charge controller managing CC/CV profile, safety timers, and status signaling without host intervention.

Use Value: Enables full USB-compliant charging with no software stack, meeting USB-IF voltage regulation (±0.75%) and thermal safety requirements.

Use Scenario: Powering and charging Li-polymer batteries in wireless earbuds and headsets where board space and thermal dissipation are critical.

IC Role / Device Role / Timing Role: Battery management unit providing preconditioning, thermal monitoring, and automatic recharge in ultra-small form factor.

Use Value: Extends battery cycle life via precise 4.20 V regulation and prevents thermal runaway using integrated NTC interface and die-temp regulation.

Digital Imaging Equipment

Personal Data Assistants

Use Scenario: Recharging high-capacity Li-ion packs (1000–2000 mAh) in digital cameras and camcorders with minimal external components.

IC Role / Device Role / Timing Role: Primary charge controller executing full CC/CV algorithm, including timer-based safety timeout and voltage-based recharge.

Use Value: Delivers reliable 1 A charging with <1% load/line regulation, ensuring consistent full-charge capacity across varying ambient temperatures (−40°C to +85°C).

Use Scenario: Managing battery charging in legacy PDAs with limited PCB real estate and no dedicated charging MCU.

IC Role / Device Role / Timing Role: Autonomous charge manager handling preconditioning, fast charge, CV regulation, and EOC detection in hardware.

Use Value: Eliminates need for firmware-based charging logic while supporting automatic recharge at 94–96.5% V_REG, maintaining usable runtime between sync sessions.

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, MSOP-8 package, fixed 4.20 V regulation, max 500 mA charge current.	Suitable for cost-sensitive, lower-current designs where dual status or power-good signaling is unnecessary.	Select when board space allows MSOP-8 and peak charge current ≤500 mA; lacks thermal pad and dual-status flexibility of MCP73833T-AMI/UN.
BQ24075RGTR	TI part with integrated LDO, I²C interface, and dynamic power path management; 4.20 V regulation, 1.5 A max current; QFN-16 package.	Supports system power-up during charging and host-controlled configuration - not available on MCP73833T-AMI/UN.	Choose when system-level power-path control or firmware configurability is required; adds complexity and footprint versus MCP73833T-AMI/UN's simplicity.

Compared with MCP73831T-2DCI/OT, the MCP73833T-AMI/UN provides higher current capability, dual status outputs, and superior thermal performance via its DFN-10 EP; versus BQ24075RGTR, it offers smaller footprint and zero-firmware operation but lacks I²C control and power-path arbitration.

Availability

MCP73833T-AMI/UN is available at Aetrix Electronics and suitable for USB chargers, Bluetooth headsets, digital cameras, and personal data assistants requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MCP73833T-AMI/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, serving automotive, industrial, communications, and consumer markets with high-reliability silicon and development tools.

The MCP73833/4 product line was engineered specifically for space-constrained, cost-sensitive Li-ion/Li-polymer charging applications - emphasizing minimal external components, factory-trimmed accuracy, and robust thermal management without firmware dependency.

FAQ

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

The MCP73833T-AMI/UN is factory-configured for 4.20 V ±0.75% constant-voltage regulation, optimized for standard single-cell Li-ion and Li-polymer batteries. This value is laser-trimmed and non-adjustable; other variants (e.g., MCP73833T-2DCI/UN) offer 4.35 V, 4.40 V, or 4.50 V options.

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

Charge current is set by connecting a resistor (R_PROG) from the PROG pin to VSS. Using Equation I_REG = 1000 V / R_PROG (with R_PROG in kΩ and I_REG in mA), a 1.0 kΩ resistor yields 1000 mA. R_PROG must be between 1 kΩ and 20 kΩ for valid operation; values >70 kΩ place the device in standby.

Does MCP73833T-AMI/UN support temperature monitoring?

Yes, MCP73833T-AMI/UN integrates a 50 µA ±6% thermistor bias current source on the THERM pin and compares the resulting voltage against factory-set thresholds (1.23 V and 0.25 V). If out-of-range, charging halts immediately and STAT1/STAT2 go Hi-Z while PG remains low - enabling safe, autonomous thermal protection.

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

The PG (Power Good) pin on MCP73833T-AMI/UN is a pseudo-open-drain output that sinks current when VDD exceeds the UVLO threshold (3.45 V) and is greater than VBAT. It must be pulled up only to VDD - not to another supply - due to an internal diode path. PG = low confirms valid input power presence and readiness for charging.

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

Yes - MCP73833T-AMI/UN supports System Test (LDO) mode. When THERM is driven > (VDD − 100 mV) and no battery is present, it regulates VBAT to the factory-set V_REG (4.20 V) with current limit determined by the PROG resistor, functioning as a low-dropout linear regulator for system power during bench testing or battery-less operation.

MCP73833T-AMI/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-AMI/UN FAQ

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

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

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

3.What payment methods are accepted for MCP73833T-AMI/UN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP73833T-AMI/UN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCP73833T-AMI/UN?

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

Once your MCP73833T-AMI/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-AMI/UN?

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

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

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

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

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

Return procedure for MCP73833T-AMI/UN:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…