MCP73837-FCI/MF Equivalent & Substitute Parts

Part Overview

The MCP73837-FCI/MF is a single-cell lithium ion/polymer battery charger IC manufactured by Microchip Technology. This power management IC operates with a maximum supply voltage of 6V and delivers a programmable constant charging current up to 1.1A, with battery pack voltage regulation at 4.2V. The device is housed in a 10-VFDFN exposed pad surface mount package and includes over-voltage fault protection. The part is currently active in production and ROHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

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
Fault Protection	Over Voltage
Current - Charging	Constant - Programmable
Interface	USB
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	10-VFDFN Exposed Pad
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MCP73837-FCI/MF are identified based on strict electrical and mechanical parameter equivalence. All substitute parts share identical specifications across the following critical parameters:

Battery chemistry: Lithium Ion/Polymer
Single-cell charging capability
Maximum charging current: 1.1A
Battery pack voltage: 4.2V
Maximum supply voltage: 6V
Over-voltage fault protection
USB interface
Operating temperature range: -40°C ~ 85°C
Package type: 10-VFDFN Exposed Pad
Surface mount mounting type
ROHS3 compliance
MSL Level 1

Substitutes are differentiated by packaging format (Tube vs. Cut Tape & Digi-Reel) and base product number variants (MCP73837 vs. MCP73838). These variations do not affect electrical performance or functional compatibility in circuit applications.

Parameter Comparison

Parameter	MCP73837-FCI/MF	MCP73837T-FCI/MF	MCP73837-FJI/MF	MCP73838-FCI/MF
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology
Battery Chemistry	Lithium Ion/Polymer	Lithium Ion/Polymer	Lithium Ion/Polymer	Lithium Ion/Polymer
Number of Cells	1	1	1	1
Charge Current - Max	1.1A	1.1A	1.1A	1.1A
Battery Pack Voltage	4.2V	4.2V	4.2V	4.2V
Voltage - Supply (Max)	6V	6V	6V	6V
Fault Protection	Over Voltage	Over Voltage	Over Voltage	Over Voltage
Current - Charging	Constant - Programmable	Constant - Programmable	Constant - Programmable	Constant - Programmable
Interface	USB	USB	USB	USB
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	10-VFDFN Exposed Pad	10-VFDFN Exposed Pad	10-VFDFN Exposed Pad	10-VFDFN Exposed Pad
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging Format	Tube	Cut Tape & Digi-Reel	Tube	Tube
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All four parts listed—MCP73837-FCI/MF, MCP73837T-FCI/MF, MCP73837-FJI/MF, and MCP73838-FCI/MF—are active production parts from Microchip Technology with identical electrical specifications and ROHS3 compliance. Selection between these parts should be based on packaging requirements and inventory availability:

MCP73837-FCI/MF: Tube packaging, 7,591 units in stock
MCP73837T-FCI/MF: Cut Tape & Digi-Reel packaging, 5,000,100 units in stock
MCP73837-FJI/MF: Tube packaging, 1,456 units in stock
MCP73838-FCI/MF: Tube packaging, 2,360 units in stock

All parts meet identical functional and compliance requirements for single-cell lithium ion/polymer battery charging applications with 1.1A maximum charging current and 4.2V battery pack voltage regulation.

Frequently Asked Questions (FAQ)

Q: Can MCP73837T-FCI/MF replace MCP73837-FCI/MF in production?

A: Yes. Both parts are electrically and functionally identical. The primary difference is packaging format: MCP73837-FCI/MF is supplied in Tube, while MCP73837T-FCI/MF is supplied in Cut Tape & Digi-Reel format. Selection depends on assembly line requirements and tape reel compatibility.

Q: What is the difference between MCP73837 and MCP73838 base product numbers?

A: Both base product numbers deliver identical electrical performance for single-cell lithium ion/polymer charging at 1.1A maximum current and 4.2V battery voltage. The base product number difference does not affect circuit functionality or compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All four parts listed carry ROHS3 compliance certification and MSL Level 1 (Unlimited) moisture sensitivity rating.

Q: What packaging formats are available?

A: MCP73837-FCI/MF, MCP73837-FJI/MF, and MCP73838-FCI/MF are supplied in Tube packaging. MCP73837T-FCI/MF is supplied in Cut Tape & Digi-Reel format for automated assembly processes.

Q: Do all parts support the same operating temperature range?

A: Yes. All substitute parts operate across the identical temperature range of -40°C to 85°C (TA).

Q: Can these parts be used interchangeably on the same PCB layout?

A: Yes. All parts use the identical 10-VFDFN Exposed Pad surface mount package with the same pinout and footprint, enabling direct substitution without PCB redesign.

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