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MCP73811T-420I/OT The Microchip Technology MCP73811T-420I/OT is a linear charge management controller for single-cell Lithium-Ion/Lithium-Polymer batteries. It operates with a 4.20V preset voltage regulation and a selectable charge current up to 450mA.
Mfr Part #:

MCP73811T-420I/OT

Available from 3 distributors
Mfr Name: Microchip Technology
Microchip Technology
The Microchip Technology MCP73811T-420I/OT is a linear charge management controller for single-cell Lithium-Ion/Lithium-Polymer batteries. It operates with a 4.20V preset voltage regulation and a selectable charge current up to 450mA.
✓ Total Stock: 44,624 pcs
$ Price Range: $1.29

MCP73811T-420I/OT Available from 3 distributors

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✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Risen Electronics ✓
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30,000 pcs
On Request
30000 pcs On Request 1 On Request On Request On Request On Request 2026-02-16 21:33:16
Smaxon Electronics ✓
Non-Authorised Inventory information
13,303 pcs
On Request
13303 pcs On Request 1 On Request On Request 0825+ On Request On Request
Xingangxin ✓
Non-Authorised Inventory information
1,321 pcs
On Request
1321 pcs On Request 1 On Request On Request On Request On Request On Request
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MCP73811T-420I/OT Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Battery Chemistry
Battery Pack Voltage
Charge Current
Current
Mounting Type
Number of Cells
Operating Temperature
Supplier Device Package
Supplier Package
Voltage
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MCP73811T-420I/OT Description

Short technical summary and product information.

The MCP73811T-420I/OT from Microchip Technology is a linear charge management controller designed for cost-sensitive and space-limited applications. It is ideal for single-cell Lithium-Ion or Lithium-Polymer battery charging, providing optimal capacity in the shortest possible time.

 

This IC features constant current/constant voltage operation with thermal regulation. The voltage regulation is precisely set at 4.20V with a tight tolerance of 1%. The MCP73811 variant offers selectable charge currents of 85 mA or 450 mA, controlled via a digital input signal. The device limits charge current based on die temperature during high power or high ambient conditions, ensuring reliability.

 

Designed for minimal external components, the MCP73811T-420I/OT requires only two ceramic capacitors. It is available in a compact 5-lead SOT-23 package, suitable for portable applications. The operating temperature range is -40°C to +85°C, and it supports surface mount installation.

MCP73811T-420I/OT Quick Information

Product Type: Battery Charger IC
Canonical Name: MCP73811/2 Linear Charge Management Controller
Subcategory: Linear Charge Management Controller

MCP73811T-420I/OT Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

MCP73811T-420I/OT Estimated Pricing

Qty Low High
1+ $1.29 $1.29

Estimated market price range - modelled values for guidance only, not live distributor offers.

MCP73811T-420I/OT Features

  • Complete linear charge management controller.
  • Constant current/constant voltage operation.
  • High accuracy preset voltage regulation: 4.20V.
  • Selectable charge current: 450 mA.
  • Requires minimum external components.

MCP73811T-420I/OT Applications

  • Low-cost Lithium-Ion/Lithium-Polymer battery chargers.
  • Ideal for rechargeable toys.
  • Suitable for electronic cigarettes.
  • Used in Bluetooth headsets.
  • Applicable for USB chargers.

MCP73811T-420I/OT FAQs

7 frequently asked questions generated from this part’s specifications.
What is the charge current of the MCP73811T-420I/OT?

The charge current is 450mA.

What is the output voltage regulation?

The regulated voltage is 4.20V with ±1% accuracy.

What battery chemistries does it support?

It supports Lithium Ion and Lithium Polymer batteries.

How many cells can it charge?

It is designed for single-cell batteries.

What is the operating temperature range?

The operating temperature range is -40°C to 85°C.

What package is the MCP73811T-420I/OT available in?

It is available in a SOT-23-5 surface-mount package.

What is the mounting type?

The mounting type is Surface Mount.

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