LT3663HMS8E-3.3#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LT3663HMS8E-3.3#PBF is an automotive-grade current-mode step-down DC-DC regulator in an 8-pin MSOP with exposed pad, converting 7.5 V to 36 V input to a fixed 3.3 V output at 1.2 A, ideal for 12 V automotive and industrial power rails.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LT3663HMS8E-3.3#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $4.5700(MOQ 19)
- Temp Range
- -40.0°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3 V output at up to 1.2 A from a wide 7.5 V to 36 V input range covering automotive 12 V and 24 V systems
- Current-mode constant-frequency control provides excellent line and load transient rejection with simple loop compensation
- Automotive-qualified 8-pin MSOP with exposed pad (S-PDSO-G8) for compact, thermally-efficient PCB integration
- 36 V absolute maximum input handles automotive load-dump transients without external clamp circuits
- 10-year YTEOL product lifecycle support for long-running automotive platform designs
Applications
The LT3663HMS8E-3.3#PBF is designed for automotive body electronics, infotainment systems, and ADAS sensor modules that require a regulated 3.3 V supply from a 12 V or 24 V vehicle battery rail. Its wide 7.5 V to 36 V input range tolerates cold-crank voltage drops and load-dump spikes without external protection components, simplifying EMC compliance in harsh automotive environments. The device also suits industrial 24 V bus-powered instrumentation, PLCs, and distributed I/O modules where a compact, efficient 3.3 V converter is needed at up to 1.2 A output current.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1662 |
| YTEOL | 10 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | CONSTANT FREQUENCY |
| Input Voltage-Max | 36V |
| Input Voltage-Min | 7.5V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 2.5A |
| Output Voltage-Max | 3.366V |
| Output Voltage-Min | 3.234V |
| Output Voltage-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 3.2mA |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 1100kHz |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does LT3663HMS8E-3.3#PBF support and why is this suited to automotive 12 V systems?
The device accepts 7.5 V to 36 V input, with a nominal 12 V design point. In automotive applications, the battery voltage spans from approximately 9 V during cold cranking to over 30 V during load-dump transients, so the 36 V maximum input ensures the regulator survives ISO 7637-2 transients without external TVS protection, reducing BOM cost and board space.
How does current-mode constant-frequency control benefit automotive power supply stability?
Current-mode control senses the inductor current cycle-by-cycle and uses it as a feed-forward signal in the control loop, providing inherent protection against inductor saturation and faster response to input voltage steps typical of automotive alternator switching. The constant-frequency architecture also simplifies EMI filter design since switching noise is concentrated at a predictable frequency, easing CISPR 25 compliance in automotive radio-frequency sensitive environments.
For an ADAS sensor board running from a 12 V automotive rail, what output current does LT3663HMS8E-3.3#PBF provide at 3.3 V?
The LT3663HMS8E-3.3#PBF delivers a fixed 3.3 V output at up to 1.2 A continuous current. At 12 V input converting to 3.3 V, the conversion efficiency of a well-designed switching regulator typically exceeds 85%, meaning approximately 1.2 W of power is dissipated in the 8-pin MSOP package — a level that the exposed thermal pad can handle without an external heatsink on a standard 2-layer PCB.
How long is LT3663HMS8E-3.3#PBF expected to remain available from Analog Devices?
The LT3663HMS8E-3.3#PBF carries a YTEOL rating of 10 years, reflecting Analog Devices' long-term production commitment. For automotive platform programs that span 5 to 7 years of vehicle production plus 10-year service support, this lifecycle horizon aligns well with typical OEM supply chain requirements and eliminates near-term redesign risk due to component obsolescence.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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