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28 pcs
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28 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The LT3991EMSE#PBF is a monolithic buck switching regulator from Linear Technology Corporation (LTC) capable of handling input voltages up to 55V. It delivers a maximum output current of 1.2A and is designed for high efficiency with ultralow quiescent current, consuming only 2.8µA while regulating with no load.
This regulator operates with low ripple Burst Mode, maintaining efficiency at low output currents and keeping output ripple below 15mVp-p. It features an adjustable switching frequency from 200kHz to 2MHz, allowing for optimization of component size and efficiency. The device includes an internally compensated current mode topology for fast transient response and good loop stability.
Key features include a 1V threshold enable pin for shutdown, reducing input supply current to 700nA, and a power good flag that signals when the output voltage reaches 91% of the programmed level. A soft-start capability is also integrated to control inrush current. The LT3991EMSE#PBF is available in a thermally enhanced 10-pin MSOP package and a 3mm x 3mm DFN package, both suitable for surface mounting.
Applications for this regulator include automotive battery regulation, power for portable products, and industrial supplies. Its wide input voltage range and robust features make it a versatile solution for various power management needs.
| Qty | Low | High |
|---|---|---|
| 1+ | $1.08 | $1.08 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The maximum input voltage for the LT3991EMSE#PBF is 55V.
The LT3991EMSE#PBF can deliver a maximum output current of 1.2A.
The quiescent current is 2.8µA when regulating 12VIN to 3.3VOUT, and 2.1µA when regulating 12VIN for fixed output voltages.
The output ripple is less than 15mVp-p under Low Ripple Burst Mode operation.
The switching frequency can be adjusted from 200kHz to 2MHz.
Yes, the LT3991EMSE#PBF includes a power good flag that signals when the output voltage reaches 91% of the programmed output voltage.
The LT3991EMSE#PBF is available in a 10-pin MSOP package and a 10-pin DFN package.