LT3991IMSE-5#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
LT3991IMSE-5#PBF is a 55V, 1.2A step-down switching regulator with 2MHz switching frequency and ultra-low 2.8µA quiescent current, ideal for battery-powered and industrial applications requiring high efficiency.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 10
- Lifecycle
- ACTIVE
- Datasheet
- LT3991IMSE-5#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $4.5200(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LT3991IMSE-5#PBF?
- 55V input voltage range with 4.3V minimum for wide supply compatibility
- Ultra-low 2.8µA quiescent current for high efficiency in light-load and sleep modes
- 2MHz switching frequency enabling use of small external inductors and capacitors
- Current-mode PWM control for fast transient response and cycle-by-cycle current limiting
- Fixed 5V output in MSOP-10 package for compact PCB designs
What is LT3991IMSE-5#PBF used for?
The LT3991IMSE-5#PBF is well suited for industrial power supplies where input voltages up to 55V must be stepped down to a regulated 5V rail with minimal standby losses. Its 2.8µA quiescent current makes it an excellent choice for battery-operated equipment such as remote sensors and IoT nodes that spend extended periods in sleep mode. The 2MHz switching frequency also allows designers to use smaller passives, benefiting space-constrained automotive and portable electronics designs.
What are the specifications of LT3991IMSE-5#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 | 55V |
| 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 | 2.9A |
| Output Voltage-Max | 5.11V |
| Output Voltage-Min | 4.89V |
| Output Voltage-Nom | 5V |
| 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 |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 2400kHz |
| Technology | BIPOLAR |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| 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 |
| Country of Origin | Malaysia |
Where can I find the LT3991IMSE-5#PBF datasheet?
LT3991IMSE-5#PBF Datasheet DownloadOfficial datasheet from Analog Devices
What are equivalent replacements for LT3991IMSE-5#PBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does the LT3991IMSE-5#PBF support, and how does this affect system design?
The LT3991IMSE-5#PBF operates from 4.3V to 55V input, making it suitable for 12V, 24V, and 48V industrial rails. This 55V maximum rating provides margin against load-dump transients common in automotive and industrial environments without additional protection components.
How does the LT3991IMSE-5#PBF achieve such low power consumption in standby modes?
The regulator draws only 2.8µA of quiescent current when lightly loaded, which extends battery runtime by orders of magnitude in duty-cycled systems. For a 1000mAh lithium cell powering a sleeping sensor node, this 2.8µA draw represents over 40,000 hours of standby life from the regulator alone.
Which passive component values are needed for the LT3991IMSE-5#PBF operating at 2MHz with a 5V output?
At 2MHz switching frequency the LT3991IMSE-5#PBF typically requires an inductor in the 4.7µH to 10µH range and output capacitors of 10µF to 22µF. Smaller passives at 2MHz reduce solution footprint compared to 400kHz alternatives while maintaining stable 5V regulation up to 1.2A.
In what industrial control scenarios can the LT3991IMSE-5#PBF replace a bulkier discrete power stage?
The device integrates the power switch and control loop in a compact MSOP-10 package, replacing multi-component discrete designs in 24V PLC backplane cards and 48V field instrument transmitters. Its 1.2A output current and current-mode PWM control cover most microcontroller and analog front-end supply requirements in these systems.
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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+ | $5.1624 | $5.16 |
| 1000+ | $4.5200 | $4520.00 |
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