LT3971EMSE-3.3#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LT3971EMSE-3.3#PBF is a 40V input, 1.2A step-down switching regulator with fixed 3.3V output, 2 MHz switching frequency, and ultra-low 2 µA quiescent current, in a 10-pin MSOP package.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 10
- Lifecycle
- ACTIVE
- Datasheet
- LT3971EMSE-3.3#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.6530(MOQ 1)
- Temp Range
- ?°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LT3971EMSE-3.3#PBF?
- Ultra-low 2 µA quiescent current enabling years of battery life in always-on IoT and standby power designs
- Wide 4.3V to 38V input range supporting automotive, industrial, and telecom 12V to 24V rail applications
- 2 MHz fixed switching frequency minimizing external inductor and capacitor size for compact power stages
- Fixed 3.3V output simplifies design by eliminating feedback resistor divider for standard logic supply rails
- Current-mode PWM control with 1.2A output current for efficient DC-DC conversion in space-constrained boards
What is LT3971EMSE-3.3#PBF used for?
The LT3971EMSE-3.3#PBF is ideal for battery-powered IoT nodes, wireless sensors, and handheld devices where minimizing standby power is critical — its 2 µA quiescent current allows the system to remain powered for extended periods between active cycles. In automotive and industrial designs it steps down 12V or 24V rails to a clean 3.3V logic supply at 1.2A, supporting microcontrollers, sensors, and communication modules from a single regulator. The 2 MHz switching frequency keeps the LC filter components small enough to fit on dense multilayer PCBs alongside RF and signal-processing circuits.
What are the specifications of LT3971EMSE-3.3#PBF?
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1664 |
| YTEOL | 10 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 38V |
| Input Voltage-Min | 4.3V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | S-PDSO-G10 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 3A |
| Output Voltage-Nom | 3.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 2400kHz |
| Technology | BIPOLAR |
| Temperature Grade | OTHER |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| 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 |
Where can I find the LT3971EMSE-3.3#PBF datasheet?
LT3971EMSE-3.3#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT3971EMSE-3.3#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the 2 µA quiescent current of LT3971EMSE-3.3#PBF extend battery life in IoT designs?
With only 2 µA quiescent current, the LT3971EMSE-3.3#PBF draws negligible power during sleep intervals; a 1000 mAh battery powering a duty-cycled IoT node can sustain months of standby operation compared to regulators with 50 µA or higher IQ.
What input voltage range does LT3971EMSE-3.3#PBF support for automotive 12V systems?
It accepts inputs from 4.3V to 38V, fully covering the automotive 12V battery rail including cold-crank conditions down to 6V and load-dump transients up to 36V, making it suitable for in-vehicle 3.3V logic supply rails at 1.2A.
Why is a 2 MHz switching frequency beneficial for the LT3971EMSE-3.3#PBF power stage layout?
At 2 MHz, the required inductance and capacitance values are much smaller than at 300 kHz to 500 kHz — a 4.7 µH inductor and 10 µF output capacitors are typically sufficient — keeping the power stage footprint compact on dense multilayer boards.
Does LT3971EMSE-3.3#PBF require external resistors to set the output voltage?
No, the LT3971EMSE-3.3#PBF has a fixed 3.3V output internally, eliminating the feedback resistor divider needed by adjustable regulators and reducing external component count and board space in standard 3.3V microcontroller and communication module power supplies.
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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 |
|---|---|---|
| 1+ | $4.3515 | $4.35 |
| 48+ | $3.9340 | $188.83 |
| 128+ | $3.6530 | $467.58 |
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