LP8345IDT-1.8/NOPB Equivalent & Substitute Parts

Part Overview

The LP8345IDT-1.8/NOPB is a linear voltage regulator IC manufactured by Texas Instruments, designed to deliver a fixed 1.8V output at 500mA in a TO-252-3 surface mount package. This device is classified as a positive fixed output regulator within the Power Management (PMIC) category. The part is currently discontinued at DiGi Electronics, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

LP8345IDT-1.8/NOPB

Texas InstrumentsIn Stock: 1250LP8345IDT-1.8/NOPB Datasheet

Current PartRFQ

BD18KA5FP-E2

Rohm SemiconductorIn Stock: 18552BD18KA5FP-E2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LP8345IDT-1.8/NOPB is determined by the following critical parameters:

• Fixed output voltage of 1.8V
• Minimum output current capability of 500mA
• Positive output configuration
• TO-252-3 package compatibility
• Surface mount technology
• Operating temperature range support
• RoHS3 compliance and regulatory alignment

The BD18KA5FP-E2 manufactured by Rohm Semiconductor meets these core substitution criteria. Both devices deliver identical fixed 1.8V output, support 500mA output current, utilize the same TO-252-3 package footprint, and maintain RoHS3 compliance. The substitute part is currently in active production status, ensuring long-term availability.

Parameter Comparison

Engineering Selection Recommendations

The BD18KA5FP-E2 is a direct functional substitute for the LP8345IDT-1.8/NOPB based on matching output voltage, output current rating, and package configuration. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for production applications.

The primary design consideration is the maximum input voltage specification: the LP8345IDT-1.8/NOPB supports up to 10V input, while the BD18KA5FP-E2 is rated to 5.5V maximum input. Applications requiring input voltages exceeding 5.5V must retain the original Texas Instruments part or identify alternative regulators with higher input voltage ratings.

The operating temperature range of the BD18KA5FP-E2 extends to 105°C maximum, compared to 125°C for the original part. Applications requiring operation above 105°C ambient temperature should maintain the original specification.

The BD18KA5FP-E2 is currently in active production with substantial inventory availability, providing supply chain continuity for new designs and production support.

Frequently Asked Questions (FAQ)

Q: Can the BD18KA5FP-E2 replace the LP8345IDT-1.8/NOPB in all applications?

A: The BD18KA5FP-E2 is functionally equivalent for applications where input voltage does not exceed 5.5V and operating temperature remains below 105°C. Applications exceeding these limits require alternative component selection.

Q: Are the packages physically identical?

A: Both devices use the TO-252-3 package (DPAK with 2 leads plus tab, SC-63 designation). PCB footprints are compatible, and no layout modifications are required for substitution.

Q: What is the difference in quiescent current between these parts?

A: The LP8345IDT-1.8/NOPB specifies 50 µA quiescent current, while the BD18KA5FP-E2 specifies 550 µA. Applications with strict standby power requirements should account for this tenfold difference.

Q: Are both parts RoHS compliant?

A: Yes, both the LP8345IDT-1.8/NOPB and BD18KA5FP-E2 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What is the maximum input voltage for each part?

A: The LP8345IDT-1.8/NOPB supports maximum input voltage of 10V. The BD18KA5FP-E2 supports maximum input voltage of 5.5V. Circuit designs must operate within these specified limits.