LTC3621HMS8E-2#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
The Analog Devices LTC3621HMS8E-2#PBF is an automotive-grade synchronous step-down DC-DC converter with a 2.7 V to 17 V input range and up to 1 A output current in an 8-pin MSOP with exposed pad. It supports pulse-skip mode for high light-load efficiency and an adjustable output from 0.6 V to 17 V, making it ideal for automotive and industrial power rails. Available from stock worldwide with lead-free RoHS-compliant packaging.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LTC3621HMS8E-2#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $4.2200(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
- 2.7 V to 17 V input range covers automotive 12 V battery and industrial supply rails with a single synchronous step-down converter
- Up to 1 A continuous output current with pulse-skip mode for high efficiency at light loads in battery-operated and standby applications
- Adjustable output from 0.6 V to 17 V set by two external resistors, supporting a wide range of logic and analog supply voltages
- Automotive-grade 8-pin MSOP with exposed pad (EP) enables compact layout with enhanced thermal dissipation for under-hood or harsh environments
Applications
The LTC3621HMS8E-2#PBF is designed for automotive infotainment, ADAS sensor modules, and industrial IoT nodes where a compact 1 A step-down regulator operating from a 12 V car battery or 5 V to 17 V industrial rail is required. Its pulse-skip mode significantly reduces quiescent current in sleep or standby states, extending battery life in always-on telematics and keyless entry modules. The automotive-grade rating and 8-pin MSOP package make it suitable for harsh-environment PCBs where board space and thermal performance are constrained.
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 | 17V |
| Output Voltage-Min | 0.6V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.19 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 2600kHz |
| 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 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range and output current does LTC3621HMS8E-2#PBF support in automotive designs?
The LTC3621HMS8E-2#PBF accepts inputs from 2.7 V to 17 V and delivers up to 1 A continuous output current. In a typical automotive 12 V system, the device comfortably handles the full battery voltage range from cold-crank events (as low as 6 V) to load-dump transients (up to 16 V), without requiring additional clamping. Output voltage is programmable from 0.6 V to 17 V via two external resistors, covering common logic levels such as 1.8 V, 3.3 V, and 5 V.
How does pulse-skip mode in LTC3621HMS8E-2#PBF reduce power consumption at light loads?
In pulse-skip mode, the LTC3621HMS8E-2#PBF skips switching cycles when the output load is below a threshold, allowing the regulator's quiescent current to drop to approximately 40 µA. This is far below the 5 mA to 10 mA quiescent current of continuous-conduction-mode regulators and is critical for automotive standby modes where the vehicle is parked but the telematics or keyless entry module remains powered. Light-load efficiency can exceed 90% at currents as low as 1 mA.
What package does LTC3621HMS8E-2#PBF use and how does the exposed pad benefit thermal performance?
The LTC3621HMS8E-2#PBF is housed in an 8-pin MSOP with an exposed pad (EP) on the bottom. The exposed pad connects to the device's ground thermal slug and, when soldered to a PCB copper pour, reduces junction-to-board thermal resistance from approximately 200 °C/W to 40 °C/W or better. This allows the regulator to sustain the full 1 A output current in ambient temperatures up to 125 °C without exceeding the junction temperature limit, making it viable for automotive under-hood applications.
How do you set the output voltage of LTC3621HMS8E-2#PBF with external resistors?
Output voltage is programmed using a resistor divider between the output rail and the feedback pin, with the divider center connected to FB and the lower resistor connected to GND. The internal reference voltage is 0.6 V, so for a 3.3 V output, the upper resistor should be 4.5x the lower resistor value (e.g., 22.5 kΩ upper, 5 kΩ lower using standard 1% values). For a 1.8 V output, the ratio is 2:1 (e.g., 10 kΩ upper, 5 kΩ lower). Resistor values between 10 kΩ and 200 kΩ are recommended to balance quiescent current and noise sensitivity.
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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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