BQ2054SN Equivalent & Substitute Parts

Part Overview

The BQ2054SN is a lithium-ion battery fast charger IC manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is classified as a Power Management IC (PMIC) and is designated as Last Time Buy status, indicating it is no longer in active production. The device operates with a maximum supply voltage of 5.5V and includes fault protection for over-current and over-voltage conditions. Due to its Last Time Buy status, identifying functionally compatible substitute components is essential for ongoing design support and production continuity.

Key Parameters

Parameter	BQ2054SN
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Battery Chemistry	Lithium Ion
Charging Current Type	Constant
Fault Protection	Over Current, Over Voltage
Voltage - Supply (Max)	5.5V
Operating Temperature Range	-20°C ~ 70°C (TA)
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

The BQ25302RTER qualifies as a substitute for the BQ2054SN based on the following alignment of critical parameters:

Both components are Texas Instruments lithium-ion battery charger ICs within the Power Management (PMIC) category
Both support constant-current charging topology for lithium-ion battery chemistry
Both include fault protection for over-current and over-voltage conditions
Both are surface mount devices with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1)
The BQ25302RTER operates at a maximum supply voltage of 6.2V, which encompasses the BQ2054SN operating range of 5.5V maximum
The BQ25302RTER extends the operating temperature range to -40°C ~ 85°C, providing broader environmental coverage than the BQ2054SN range of -20°C ~ 70°C

The primary difference is the package format: BQ2054SN uses 16-SOIC while BQ25302RTER uses 16-WQFN (3x3). This substitution requires PCB layout redesign to accommodate the different package footprint.

Parameter Comparison

Parameter	BQ2054SN	BQ25302RTER	Compatibility Notes
Manufacturer	Texas Instruments	Texas Instruments	Same manufacturer
Category	Power Management (PMIC)	Power Management (PMIC)	Same functional category
Battery Chemistry	Lithium Ion	Lithium Ion/Polymer	BQ25302RTER supports extended chemistry
Charging Current Type	Constant	Constant - Programmable	BQ25302RTER offers programmable control
Fault Protection	Over Current, Over Voltage	Over Current, Over Voltage, Short Circuit	BQ25302RTER includes additional short circuit protection
Voltage - Supply (Max)	5.5V	6.2V	BQ25302RTER rated for higher supply voltage
Operating Temperature Range	-20°C ~ 70°C (TA)	-40°C ~ 85°C (TA)	BQ25302RTER supports extended temperature range
Mounting Type	Surface Mount	Surface Mount	Same mounting technology
Package / Case	16-SOIC (0.154", 3.90mm Width)	16-WQFN (3x3)	Different package footprint - PCB redesign required
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Both meet RoHS3 requirements
Product Status	Last Time Buy	Active	BQ25302RTER is in active production

Engineering Selection Recommendations

The BQ2054SN is designated Last Time Buy, making the BQ25302RTER the appropriate substitute for new designs and production continuity. The BQ25302RTER maintains functional equivalence in core charging topology and protection features while offering enhanced capabilities including programmable charging current, short-circuit protection, and extended operating temperature range.

Both components meet ROHS3 compliance and carry identical REACH and ECCN classifications (EAR99), ensuring regulatory alignment. The BQ25302RTER's higher maximum supply voltage (6.2V vs. 5.5V) and broader temperature operating window (-40°C ~ 85°C vs. -20°C ~ 70°C) provide design margin for applications requiring extended environmental performance.

Implementation of the BQ25302RTER requires PCB layout modification due to package format change from 16-SOIC to 16-WQFN (3x3). Schematic integration remains compatible with appropriate pin mapping verification against device datasheets.

Frequently Asked Questions (FAQ)

Q: Can the BQ25302RTER directly replace the BQ2054SN without PCB modification?

A: No. While functionally equivalent, the BQ25302RTER uses a 16-WQFN (3x3) package versus the BQ2054SN's 16-SOIC package. PCB footprint redesign is required. Pin-to-pin functional mapping must be verified against both device datasheets before implementation.

Q: What are the key electrical differences between these components?

A: The BQ25302RTER provides programmable charging current control, whereas the BQ2054SN uses fixed constant-current charging. The BQ25302RTER includes short-circuit protection not present in the BQ2054SN. Maximum supply voltage is 6.2V for the BQ25302RTER compared to 5.5V for the BQ2054SN.

Q: Why is the BQ2054SN listed as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued active production of this component. Existing inventory is available for a limited time. The BQ25302RTER represents the current-generation equivalent for ongoing production requirements.

Q: Are both components RoHS compliant?

A: Yes. Both the BQ2054SN and BQ25302RTER are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1) and are REACH unaffected.

Q: What is the operating temperature difference between these parts?

A: The BQ2054SN operates from -20°C to 70°C, while the BQ25302RTER operates from -40°C to 85°C. The BQ25302RTER supports a wider environmental range suitable for extended temperature applications.

Q: Does the BQ25302RTER support lithium-polymer batteries?

A: Yes. The BQ25302RTER supports both lithium-ion and lithium-polymer battery chemistry, whereas the BQ2054SN is specified for lithium-ion only.

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