BA7818FP-E2 ROHM Semiconductor Integrated Circuit (Other) In Stock
ROHM BA7818FP-E2 is a fixed positive linear voltage regulator delivering a regulated 18V output at up to 1A in a compact surface-mount package. Key specs: 21V to 33V input range, 2V dropout voltage, and 0.36% line/load regulation. Available in stock with worldwide shipping for stable power rail applications in industrial and consumer electronics.
- Manufacturer
- ROHM Semiconductor
- Package
- Other
- Pin Count
- 4
- Lifecycle
- OBSOLETE
- Datasheet
- BA7818FP-E2 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 18V positive output at 1A with tight 0.36% line and load regulation for stable power rails
- Wide 21V to 33V input range with 2V dropout voltage supporting flexible power supply designs
- 35V absolute maximum input voltage rating for robust operation in high-voltage industrial environments
- RoHS-compliant (Pb-free) SOP surface-mount package enabling compact PCB power supply layouts
Applications
The ROHM BA7818FP-E2 18V linear regulator is suitable for industrial control boards, audio amplifier power supplies, and instrumentation equipment requiring a clean, regulated 18V rail at up to 1A. Its surface-mount SOP package and tight 0.36% regulation make it ideal for powering operational amplifiers, sensor bias circuits, and relay drivers in compact industrial and consumer electronic designs.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Adjustability | FIXED |
| Dropout Voltage1-Nom | 2V |
| Input Voltage Absolute-Max | 35V |
| Input Voltage-Max | 33V |
| Input Voltage-Min | 21V |
| JESD-30 Code | R-PSSO-G2 |
| Line Regulation-Max | 0.36% |
| Load Regulation-Max | 0.36% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Output Current1-Max | 0.5A |
| Output Voltage1-Max | 18.9V |
| Output Voltage1-Min | 17.1V |
| Output Voltage1-Nom | 18V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SMSIP3H,.38,90TB |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Qualification Status | Not Qualified |
| Regulator Type | FIXED POSITIVE SINGLE OUTPUT STANDARD REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Form | GULL WING |
| Terminal Pitch | 2.3mm |
| Terminal Position | SINGLE |
| Voltage Tolerance-Max | 5% |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the input voltage range and dropout voltage of the BA7818FP-E2 linear regulator?
The BA7818FP-E2 operates from a 21V to 33V input range (absolute maximum 35V) and has a typical dropout voltage of 2V. This means the input supply must be at least 20V to maintain a regulated 18V output at up to 1A load current.
For which power supply applications does the BA7818FP-E2 outperform switching regulators?
The BA7818FP-E2 linear regulator is preferred over switching regulators in audio preamplifier power rails, precision analog sensor supplies, and low-noise measurement circuits where output ripple below 1 mV is critical. Its 0.36% line regulation produces a clean 18V rail free from switching noise artifacts above 100 kHz.
How does the SOP package of the BA7818FP-E2 affect thermal management at full 1A load?
At a 1A load with an input voltage of 24V, the BA7818FP-E2 dissipates approximately 6W as heat (ΔV × I = 6V × 1A). The SOP surface-mount package requires adequate copper pour or a heatsink to keep the junction temperature below the rated maximum of 150°C, especially in designs with limited airflow.
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