BH18SA3WGUT-E2 Equivalent & Substitute Parts

Part Overview

The BH18SA3WGUT-E2 is a linear voltage regulator IC manufactured by Rohm Semiconductor, designed for positive fixed 1.8V output at 150mA. This surface mount PMIC operates across -40°C to 85°C and includes over-current and over-temperature protection with enable control features. The part is currently in active production status with 1098 units in stock.

Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging or thermal performance is required, or when design flexibility across multiple suppliers is needed for supply chain resilience.

Substiute Parts

BH18SA3WGUT-E2

Rohm SemiconductorIn Stock: 1135BH18SA3WGUT-E2 Datasheet

Current PartRFQ

LP3990TLX-1.8/NOPB

Texas InstrumentsIn Stock: 1239LP3990TLX-1.8/NOPB Datasheet

DirectRFQ

ADP165ACBZ-1.8-R7

Analog Devices Inc.In Stock: 1380ADP165ACBZ-1.8-R7 Datasheet

SimilarRFQ

LD39115J18R

STMicroelectronicsIn Stock: 25475LD39115J18R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BH18SA3WGUT-E2 is determined by the following critical parameters:

• Output voltage fixed at 1.8V
• Output current capability of 150mA
• Maximum input voltage of 5.5V or higher
• Surface mount packaging with BGA footprint compatibility
• Enable control feature
• Over-current and over-temperature protection
• Operating temperature range of -40°C minimum and 85°C maximum or higher
• ROHS3 compliance and MSL 1 rating

The three substitute parts listed meet these core electrical and mechanical requirements while offering variations in quiescent current, PSRR performance, dropout voltage, and package geometry.

Parameter Comparison

Engineering Selection Recommendations

LP3990TLX-1.8/NOPB (Texas Instruments): This part maintains electrical equivalence with the BH18SA3WGUT-E2 across all critical parameters. It offers a higher maximum input voltage (6V vs 5.5V) and is in active production status. The 4-DSBGA package (1x1) differs from the VCSP60N1 but maintains BGA surface mount compatibility. Quiescent current is marginally higher at 80 µA. This substitute is suitable for designs requiring Texas Instruments supply chain qualification.

ADP165ACBZ-1.8-R7 (Analog Devices Inc.): This part provides the lowest quiescent current at 2.4 µA, making it advantageous for battery-powered or ultra-low-power applications. It includes additional under-voltage lockout (UVLO) protection and supports an extended operating temperature range to 125°C. The 4-WLCSP package (0.96x0.96) is the smallest footprint among the substitutes. This part is in active production status and is suitable for designs prioritizing power efficiency.

LD39115J18R (STMicroelectronics): This part offers the highest PSRR performance at 74dB ~ 67dB (1kHz ~ 10kHz) and the lowest dropout voltage at 0.11V @ 100mA. It supports an extended operating temperature range to 125°C and is in last-time-buy status. The 4-FlipChip package differs from standard BGA but maintains surface mount compatibility. This substitute is suitable for noise-sensitive applications but should be evaluated for long-term availability given its product status.

All three substitutes maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can I use LP3990TLX-1.8/NOPB as a direct replacement for BH18SA3WGUT-E2?

A: Yes, the LP3990TLX-1.8/NOPB meets all critical electrical parameters: 1.8V fixed output, 150mA current capability, and equivalent protection features. The 4-DSBGA (1x1) package differs from VCSP60N1, requiring PCB layout verification for pin compatibility and thermal performance.

Q: Which substitute has the best power efficiency?

A: The ADP165ACBZ-1.8-R7 has the lowest quiescent current at 2.4 µA, compared to 72 µA for the BH18SA3WGUT-E2. This makes it the most efficient choice for battery-powered applications.

Q: Are all substitutes RoHS compliant?

A: Yes, all three substitute parts are ROHS3 compliant with MSL 1 rating, matching the original part's environmental and handling specifications.

Q: What is the difference between the package types?

A: The BH18SA3WGUT-E2 uses VCSP60N1 (4-WFBGA, CSPBGA). Substitutes use 4-DSBGA (1x1), 4-WLCSP (0.96x0.96), and 4-FlipChip packages. All are surface mount BGA variants with different footprint geometries. PCB layout must be verified for each package type.

Q: Can I use LD39115J18R if the BH18SA3WGUT-E2 is unavailable?

A: Yes, the LD39115J18R meets all electrical requirements and offers superior PSRR and dropout voltage performance. However, it is in last-time-buy status, indicating limited future availability. Verify long-term supply chain requirements before selecting this part.

Q: What is the maximum operating temperature for each part?

A: BH18SA3WGUT-E2, LP3990TLX-1.8/NOPB: 85°C. ADP165ACBZ-1.8-R7, LD39115J18R: 125°C. Extended temperature range parts are suitable for industrial or automotive applications.

Q: Do all substitutes include enable control?

A: Yes, all three substitute parts include enable control features, matching the BH18SA3WGUT-E2 functionality.