MCP73834T-CNI/MF Equivalent & Substitute Parts

Part Overview

The MCP73834T-CNI/MF is a single-cell lithium ion/polymer battery charger IC manufactured by Microchip Technology, packaged in a 10-DFN (3x3) surface mount configuration with exposed pad. This active product operates across -40°C to 85°C and delivers programmable constant charging current up to 1.1A with over-temperature fault protection. The part is ROHS3 compliant and carries MSL Level 1 rating.

Equivalent and substitute parts are necessary when the original packaging format (Tape & Reel) is unavailable, when alternative charge current specifications meet application requirements, or when inventory constraints require selection from available stock alternatives.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Battery Chemistry	Lithium Ion/Polymer
Number of Cells	1
Charge Current - Max	1.1A
Battery Pack Voltage	4.2V
Voltage - Supply (Max)	6V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	10-VFDFN Exposed Pad
Mounting Type	Surface Mount
Fault Protection	Over Temperature
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Battery chemistry (Lithium Ion/Polymer)
Single-cell configuration
10-DFN (3x3) package with exposed pad
Surface mount mounting type
Operating temperature range (-40°C ~ 85°C)
Over-temperature fault protection
ROHS3 compliance and MSL Level 1 rating

Substitute parts are grouped into two categories:

Direct Packaging Substitute: MCP73834-CNI/MF differs only in packaging format (Tube vs. Tape & Reel) while maintaining identical electrical specifications and base product number.

Parametric Equivalents: MCP73833T-AMI/MF, MCP73833T-CNI/MF, MCP73833T-FCI/MF, and MCP73834T-FCI/MF share all critical electrical and mechanical parameters. The MCP73833 series uses an alternate base product designation but maintains functional equivalence. MCP73833T-FCI/MF specifies maximum charge current of 1A, which is within the 1.1A capability envelope and remains compatible for applications requiring ≤1A charging.

Parameter Comparison

Part Number	Manufacturer	Packaging	Charge Current - Max	Battery Pack Voltage	Voltage - Supply (Max)	Operating Temperature	Package / Case	RoHS Status	Inventory (Pcs)
MCP73834T-CNI/MF	Microchip Technology	Tape & Reel (TR)	1.1A	4.2V	6V	-40°C ~ 85°C	10-VFDFN Exposed Pad	ROHS3 Compliant	822
MCP73834-CNI/MF	Microchip Technology	Tube	1.1A	4.2V	6V	-40°C ~ 85°C	10-VFDFN Exposed Pad	ROHS3 Compliant	1332
MCP73833T-AMI/MF	Microchip Technology	Cut Tape (CT) & Digi-Reel®	1.1A	4.2V	6V	-40°C ~ 85°C	10-VFDFN Exposed Pad	ROHS3 Compliant	15920
MCP73833T-CNI/MF	Microchip Technology	Cut Tape (CT) & Digi-Reel®	1.1A	4.2V	6V	-40°C ~ 85°C	10-VFDFN Exposed Pad	ROHS3 Compliant	3100
MCP73833T-FCI/MF	Microchip Technology	Cut Tape (CT) & Digi-Reel®	1A	4.2V	6V	-40°C ~ 85°C	10-VFDFN Exposed Pad	ROHS3 Compliant	32888
MCP73834T-FCI/MF	Microchip Technology	Cut Tape (CT) & Digi-Reel®	1.1A	4.2V	6V	-40°C ~ 85°C	10-VFDFN Exposed Pad	ROHS3 Compliant	35200

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance with MSL Level 1 rating, ensuring regulatory and environmental compatibility with the original MCP73834T-CNI/MF.

For applications requiring maximum charge current of 1.1A, select from MCP73834T-CNI/MF, MCP73834-CNI/MF, MCP73833T-AMI/MF, MCP73833T-CNI/MF, or MCP73834T-FCI/MF.

For applications with maximum charge current requirement of 1A or less, MCP73833T-FCI/MF is functionally equivalent and offers the highest available inventory (32,888 pcs).

Packaging format selection depends on assembly process requirements: Tape & Reel for automated high-volume production, Tube for manual or low-volume assembly, or Cut Tape & Digi-Reel® for flexible handling and reduced waste.

Frequently Asked Questions (FAQ)

Q: Can MCP73833T-FCI/MF replace MCP73834T-CNI/MF in all applications?

A: MCP73833T-FCI/MF is functionally equivalent for applications where maximum charge current does not exceed 1A. The 1A specification is a subset of the 1.1A capability. Applications requiring the full 1.1A charging current must use MCP73834 series parts or MCP73833 parts rated for 1.1A.

Q: What is the difference between MCP73834 and MCP73833 base product numbers?

A: Both series share identical electrical specifications, package configuration, and operating parameters. The base product number difference reflects Microchip's internal product designation but does not affect functional compatibility or performance characteristics.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel, Tube, and Cut Tape & Digi-Reel® packaging formats are mechanical delivery methods only. All parts within each format group deliver identical electrical performance and specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance and MSL Level 1 rating, matching the original MCP73834T-CNI/MF specifications.

Q: Which substitute part has the highest inventory availability?

A: MCP73834T-FCI/MF offers the highest inventory at 35,200 pcs, followed by MCP73833T-FCI/MF at 32,888 pcs. Both are available in Cut Tape & Digi-Reel® packaging.

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