LP8345CLDX-ADJ/NOPB Equivalent & Substitute Parts

Part Overview

The LP8345CLDX-ADJ/NOPB is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This device delivers 500mA output current in a compact 6-WSON package with integrated over-current and over-temperature protection. The product is currently obsolete, making equivalent substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Product Status	Obsolete
Output Configuration	Positive
Output Type	Adjustable
Current - Output	500mA
Voltage - Input (Max)	10V
Voltage - Output (Min/Fixed)	1.25V
Voltage Dropout (Max)	0.5V @ 500mA
Package / Case	6-WDFN Exposed Pad
Operating Temperature	0°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP8345CLDX-ADJ/NOPB are selected based on the following critical parameters:

Output configuration (positive adjustable)
Output current capability (500mA minimum)
Adjustable voltage output range (1.25V minimum)
Surface mount packaging
Protection features (over-current and over-temperature)
RoHS3 compliance

The two qualified substitutes meet these core functional requirements while accommodating variations in package type, input voltage rating, and quiescent current specifications. Both substitutes are active products with current manufacturing support.

Parameter Comparison

Parameter	LP8345CLDX-ADJ/NOPB	BD00KA5WFP-E2	ST1L05BPUR
Manufacturer	Texas Instruments	Rohm Semiconductor	STMicroelectronics
Product Status	Obsolete	Active	Active
Output Configuration	Positive	Positive	Positive
Output Type	Adjustable	Adjustable	Adjustable
Current - Output	500mA	500mA	1.3A
Voltage - Input (Max)	10V	5.5V	7V
Voltage - Output (Min/Fixed)	1.25V	1V	1.22V
Voltage Dropout (Max)	0.5V @ 500mA	0.2V @ 200mA	0.3V @ 1.3A (Typ)
Current - Quiescent (Iq)	50 µA	550 µA	650 µA
PSRR	55dB (120Hz)	50dB (120Hz)	72dB (120Hz)
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature
Operating Temperature	0°C ~ 125°C	-40°C ~ 105°C	0°C ~ 125°C
Package / Case	6-WDFN Exposed Pad	TO-252-5, DPAK	6-VDFN Exposed Pad
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both substitute parts are active products with current manufacturing support and ROHS3 compliance, providing long-term availability advantages over the obsolete LP8345CLDX-ADJ/NOPB.

The BD00KA5WFP-E2 (Rohm Semiconductor) maintains the 500mA output current specification and offers improved dropout voltage performance at reduced load conditions. The TO-252-5 package provides a larger footprint compared to the original 6-WSON, requiring PCB layout modification. Input voltage rating is reduced to 5.5V maximum, necessitating circuit review for applications exceeding this specification.

The ST1L05BPUR (STMicroelectronics) provides enhanced output current capability at 1.3A, superior PSRR performance at 72dB, and includes additional control features (Enable and Power Good). The 6-VDFN package maintains similar footprint characteristics to the original 6-WDFN, minimizing PCB redesign requirements. Operating temperature range matches the original specification (0°C ~ 125°C). Input voltage rating of 7V maximum requires verification for applications originally designed for the 10V input specification of the LP8345CLDX-ADJ/NOPB.

Frequently Asked Questions (FAQ)

Q: Can the BD00KA5WFP-E2 directly replace the LP8345CLDX-ADJ/NOPB without PCB modification?

A: No. The BD00KA5WFP-E2 uses a TO-252-5 package (DPAK) versus the original 6-WSON package. PCB layout changes are required for pin routing and thermal management. Additionally, the maximum input voltage is reduced from 10V to 5.5V, requiring circuit verification.

Q: Which substitute is recommended for space-constrained applications?

A: The ST1L05BPUR offers the closest package compatibility with its 6-VDFN Exposed Pad configuration, similar in size to the original 6-WDFN package. This minimizes PCB redesign effort for applications with limited board space.

Q: What is the impact of increased quiescent current in the substitute parts?

A: The BD00KA5WFP-E2 and ST1L05BPUR have quiescent currents of 550 µA and 650 µA respectively, compared to 50 µA in the original LP8345CLDX-ADJ/NOPB. For battery-powered or low-power standby applications, this represents a significant increase in idle power consumption and requires system-level power budget reassessment.

Q: Are both substitutes suitable for the full operating temperature range of the original part?

A: The ST1L05BPUR matches the original 0°C ~ 125°C operating range. The BD00KA5WFP-E2 operates from -40°C ~ 105°C, with a reduced upper temperature limit of 105°C versus the original 125°C. Applications requiring operation above 105°C must use the ST1L05BPUR.

Q: How do the input voltage specifications affect substitution decisions?

A: The original LP8345CLDX-ADJ/NOPB accepts input voltages up to 10V. The BD00KA5WFP-E2 is limited to 5.5V maximum input, while the ST1L05BPUR accepts up to 7V. Circuits designed for 10V input operation cannot use the BD00KA5WFP-E2 without additional input voltage regulation. The ST1L05BPUR requires verification for applications exceeding 7V input.

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