MP26121DQ-LF-Z Equivalent & Substitute Parts

Part Overview

The MP26121DQ-LF-Z is a lithium ion/polymer battery charger IC manufactured by Monolithic Power Systems Inc., classified as a Power Management (PMIC) component. This single-cell charger operates with a maximum charge current of 1A and supports a 4.2V battery pack voltage with programmable charging timer and over-voltage fault protection. The part is Active status and ROHS3 compliant, making it suitable for portable battery management applications requiring constant-current programmable charging control.

Equivalent substitute parts are necessary when the primary part number becomes unavailable due to inventory constraints, supply chain disruptions, or packaging format requirements for specific manufacturing processes.

Substiute Parts

MP26121DQ-LF-Z

Monolithic Power Systems Inc.In Stock: 47606MP26121DQ-LF-Z Datasheet

Current PartRFQ

MP2605DQ-LF-P

Monolithic Power Systems Inc.In Stock: 889MP2605DQ-LF-P Datasheet

Parametric EquivalentRFQ

MP2605DQ-LF-Z

Monolithic Power Systems Inc.In Stock: 25479MP2605DQ-LF-Z Datasheet

Parametric EquivalentRFQ

MP26121DQ-LF-P

Monolithic Power SystemsIn Stock: 1329MP26121DQ-LF-P Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP26121DQ-LF-Z is determined by strict electrical and mechanical parameter matching across the following criteria:

Critical Matching Parameters:

• Battery Chemistry: Lithium Ion/Polymer
• Number of Cells: 1
• Charge Current - Max: 1A
• Battery Pack Voltage: 4.2V
• Voltage - Supply (Max): 6.5V
• Current - Charging: Constant - Programmable
• Programmable Features: Timer
• Fault Protection: Over Voltage
• Operating Temperature: -40°C ~ 85°C (TA)
• Package / Case: 10-VFDFN Exposed Pad
• Supplier Device Package: 10-QFN (3x3)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

All substitute parts listed maintain identical electrical specifications and mechanical compatibility. Differences exist only in packaging format (Tape & Reel vs. Cut Tape) and base product numbering (MP2605 vs. MP26121 series), which do not affect functional performance or circuit-level integration.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain Active product status and full ROHS3 compliance with REACH Unaffected designation. Selection between MP26121DQ-LF-Z and its equivalents should be based on packaging format requirements and inventory availability:

MP26121DQ-LF-Z and MP26121DQ-LF-P differ only in packaging format (Cut Tape vs. Tape & Reel), with identical electrical and mechanical specifications. MP2605DQ-LF-Z and MP2605DQ-LF-P are functionally equivalent alternatives with identical performance parameters and packaging options.

For high-volume automated assembly processes, Tape & Reel packaging (MP2605DQ-LF-P or MP26121DQ-LF-P) is standard. For manual assembly or low-volume applications, Cut Tape packaging (MP26121DQ-LF-Z or MP2605DQ-LF-Z) may be appropriate. All parts support the same circuit integration and thermal operating range.

Frequently Asked Questions (FAQ)

Q: Can MP2605DQ-LF-Z be used as a direct replacement for MP26121DQ-LF-Z?

A: Yes. Both parts are electrically and mechanically identical, with matching charge current (1A), battery voltage (4.2V), supply voltage (6.5V), operating temperature range (-40°C to 85°C), and 10-QFN (3x3) package. The difference is packaging format only (Cut Tape).

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging supplies individual components on carrier tape without reel backing, suitable for manual assembly or small-quantity applications. Tape & Reel packaging includes the full reel for automated pick-and-place assembly systems. Electrical and mechanical performance are identical.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (MP2605DQ-LF-P, MP2605DQ-LF-Z, MP26121DQ-LF-P) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity and REACH Unaffected status.

Q: Can these parts be used interchangeably in the same PCB design?

A: Yes. All substitute parts share identical electrical specifications, operating parameters, and 10-VFDFN Exposed Pad package geometry, enabling direct PCB-level substitution without design modification.

Q: What inventory levels are available for each part?

A: MP26121DQ-LF-Z: 47,557 pcs; MP2605DQ-LF-P: 842 pcs; MP2605DQ-LF-Z: 25,400 pcs; MP26121DQ-LF-P: 1,317 pcs.