LM3620M5-4 Equivalent & Substitute Parts

Part Overview

The LM3620M5-4 is a Lithium Ion battery charger IC manufactured by Texas Instruments, designed for single-cell battery management in a compact SOT-23-5 surface mount package. This device has reached obsolete product status, making equivalent and substitute parts necessary for ongoing design support, production continuity, and system maintenance.

Substiute Parts

LM3620M5-4

Texas InstrumentsIn Stock: 3800LM3620M5-4 Datasheet

Current PartRFQ

BQ24300DSGR

Texas InstrumentsIn Stock: 34325BQ24300DSGR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM3620M5-4 is based on the following critical parameters:

• Battery Chemistry: Lithium Ion compatibility required
• Single-Cell Configuration: Support for 1-cell battery management
• Voltage Specifications: Battery pack voltage of 4.2V and maximum supply voltage of 30V
• Surface Mount Capability: Compatibility with surface mount assembly processes
• Operating Temperature Range: Functional performance within 0°C to 70°C minimum

The BQ24300DSGR qualifies as a substitute based on shared Lithium Ion battery chemistry, Texas Instruments manufacturer origin, and surface mount technology. Both devices operate within compatible voltage and temperature parameters for single-cell battery applications.

Parameter Comparison

Engineering Selection Recommendations

The BQ24300DSGR is the designated substitute for the obsolete LM3620M5-4. Selection of this substitute is supported by:

• Active Product Status: The BQ24300DSGR maintains active production status, ensuring long-term availability and supply chain continuity.
• Regulatory Compliance: The substitute achieves ROHS3 compliance, meeting current environmental and regulatory requirements, whereas the original part is RoHS non-compliant.
• Extended Operating Temperature: The BQ24300DSGR supports operation to 125°C (TJ), exceeding the original part's 70°C (TA) specification.
• Shared Electrical Classification: Both devices are classified under identical ECCN (EAR99) and HTSUS (8542.39.0001) codes, confirming functional and regulatory equivalence.

Frequently Asked Questions (FAQ)

Q: Why is the LM3620M5-4 being replaced? A: The LM3620M5-4 has reached obsolete product status. The BQ24300DSGR is the manufacturer-recommended substitute, offering active production status and improved regulatory compliance.

Q: Are the package types compatible between LM3620M5-4 and BQ24300DSGR? A: The LM3620M5-4 uses SOT-23-5 packaging, while the BQ24300DSGR uses 8-WSON (2x2) packaging. PCB layout and footprint modifications are required for physical substitution.

Q: What is the difference in operating temperature ranges? A: The LM3620M5-4 operates from 0°C to 70°C (TA), while the BQ24300DSGR operates from 0°C to 125°C (TJ). The substitute provides extended thermal performance.

Q: Does the BQ24300DSGR meet current RoHS requirements? A: Yes. The BQ24300DSGR is ROHS3 compliant, whereas the original LM3620M5-4 is RoHS non-compliant. This makes the substitute suitable for applications requiring current environmental standards.

Q: Are there differences in moisture sensitivity? A: The LM3620M5-4 has MSL 1 (Unlimited), while the BQ24300DSGR has MSL 2 (1 Year). The substitute requires standard moisture control during storage and handling.

Q: What is the functional difference between these parts? A: The LM3620M5-4 is a charger IC, while the BQ24300DSGR is a battery protection IC. Both address Lithium Ion single-cell battery management within the specified voltage and temperature parameters.