LTC3621EMS8E-3.3#TRPBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
LTC3621EMS8E-3.3#TRPBF is a synchronous step-down DC-DC converter from Analog Devices with a fixed 3.3 V output, accepting 2.7 V to 17 V input and delivering up to 1 A output current. Current-mode control with pulse-skip operation maximises efficiency at light loads in automotive and industrial designs. Available on tape-and-reel with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LTC3621EMS8E-3.3#TRPBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.5300(MOQ 1)
- Temp Range
- ?°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3 V synchronous step-down output from a wide 2.7 V to 17 V input range covers automotive 12 V battery and industrial 5 V rails
- 1 A continuous output current with current-mode control and pulse-skip mode for high efficiency across light and heavy loads
- Automotive-grade 8-pin MSOP-EP package with exposed pad enables compact, thermally efficient PCB designs
- Analog Devices LTC precision design delivers tight load and line regulation suitable for noise-sensitive analog and digital subsystems
Applications
The LTC3621EMS8E-3.3#TRPBF is designed for automotive infotainment, ADAS sensor modules, and telematics units that require a regulated 3.3 V rail from a 12 V vehicle battery. Its wide 2.7 V to 17 V input range also suits industrial field instruments, handheld test equipment, and embedded computing boards powered from unregulated 5 V or 12 V adapters. The pulse-skip control mode reduces quiescent current in battery-backed IoT nodes and portable instruments where standby power consumption directly impacts battery runtime.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1662 |
| YTEOL | 10 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE SKIP MODE |
| Input Voltage-Max | 17V |
| Input Voltage-Min | 2.7V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 1A |
| Output Voltage-Max | 3.35V |
| Output Voltage-Min | 3.25V |
| Output Voltage-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.19 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 1160kHz |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| 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 the LTC3621EMS8E-3.3#TRPBF support, and is it suitable for a 12 V automotive battery supply?
The LTC3621EMS8E-3.3#TRPBF accepts an input voltage of 2.7 V to 17 V, which comfortably spans the 9 V to 16 V range seen on a 12 V automotive battery under cranking and load-dump conditions. This makes it a robust choice for automotive ECUs, infotainment systems, and telematics units that need a stable 3.3 V output from an unregulated vehicle bus.
How much output current can the LTC3621EMS8E-3.3#TRPBF deliver, and what control mode improves light-load efficiency?
The LTC3621EMS8E-3.3#TRPBF delivers up to 1 A continuous output current. Its current-mode control architecture combined with pulse-skip mode allows the converter to maintain high efficiency at loads below 100 mA, which is critical in battery-powered IoT nodes and always-on sensor modules where the dominant operating state is light load.
Which package does the LTC3621EMS8E-3.3#TRPBF use, and how does it aid thermal management in compact designs?
The LTC3621EMS8E-3.3#TRPBF is housed in an 8-pin MSOP package with an exposed thermal pad (EP). The exposed pad transfers heat directly to the PCB copper pour, allowing the IC to sustain 1 A output current without a heatsink even when operating from a 17 V input, reducing thermal derating in space-constrained automotive and industrial boards.
When is LTC3621EMS8E-3.3#TRPBF a better choice than a linear regulator for powering a 3.3 V microcontroller from a 12 V rail?
At 1 A from a 12 V input, a linear regulator would dissipate approximately 8.7 W as heat, requiring a large heatsink and increasing PCB area. The LTC3621EMS8E-3.3#TRPBF's synchronous switching topology achieves efficiencies above 85%, cutting power loss to under 1.5 W in the same scenario and eliminating the heatsink entirely, which is decisive in automotive and embedded designs with strict thermal budgets.
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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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| Qty. | Unit Price | Ext. Price |
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| 1+ | $4.9200 | $4.92 |
| 19+ | $4.6800 | $88.92 |
| 1000+ | $3.5300 | $3530.00 |
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