LT3991EMSE-5#PBF Internal Power Switch Buck Regulators by Analog Devices

Status: Production
Series: LT3991
RoHS: Compliant
Download Datasheet Visit Manufacturer Site View Pricing & Stock

The LT3991 is an adjustable frequency monolithic buck switching regulator that accepts a wide input voltage range up to 55V. Low quiescent current design consumes only 2.8μA of supply current while regulating with no load. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple below 15mV in a typical application. An internally compensated current mode topology is used for fast transient response and good loop stability. A high efficiency 0.44Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control and logic circuitry. An accurate 1V threshold enable pin can be used to shut down the LT3991, reducing the input supply current to 700nA. A capacitor on the SS pin provides a controlled inrush current (soft-start). A power good flag signals when VOUT reaches 91% of the programmed output voltage. The LT3991 is available in small 10-pin MSOP and 3mm × 3mm DFN packages with exposed pads for low thermal resistance.

Where to Buy

Prices starting from US$4.57

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Analog Devices
from US$4.83
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Newark Electronics
from US$5.76
114
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element14
from US$5.10
114
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Farnell
from US$4.92
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Chip One Stop
from US$5.34
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Richardson RFPD
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Alternative Descriptions

55V, 1.2A Buck Reg w/ 2.8µA Q | Analog Devices
Dc/Dc Conv, Buck, 2Mhz, 125Deg C | Newark Electronics
DC/DC CONV, BUCK, 2MHZ, 125DEG C | element14
DC TO DC CONVERTER | Richardson RFPD


LT3991EMSE-5#PBF Semiconductors - ICs by Linear Technology

BUCK 55VIN 1.2A 2MHZ 10MSOP

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Topology Buck (Step Down)
Input Voltage Min 4.3V
Input Voltage Max 55V
DC / DC Converter IC Case MSOP
No. of Pins 10Pins
Output Current 1.2A
Output Voltage Nom. 5V
Switching Frequency 2MHz
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)
Base Number 3991
No. of Outputs 1Outputs
Operating Temperature Min -40°C
Operating Temperature Range -40°C to +125°C
Output Voltage 5V
Primary Input Voltage 55V

Frequently Asked Questions

Where can I find additional details, specifications and documents for a LT3991EMSE-5#PBF?

Additional datasheets, footprints and schematics for LT3991EMSE-5#PBF are listed on our Part Details page. You can also find images and similar parts to LT3991EMSE-5#PBF on this page.

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What category does LT3991EMSE-5#PBF fall under?

The LT3991EMSE-5#PBF is listed under Internal Power Switch Buck Regulators.

Can I view similar or alternative parts?

You can view similar parts to LT3991EMSE-5#PBF when available in the Internal Power Switch Buck Regulators range under the specifications section at the bottom of the details page.

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Is the LT3991EMSE-5#PBF RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

Which authorised distributors for LT3991EMSE-5#PBF have stock available?

Authorised distributors including Analog Devices, Newark Electronics, element14, Farnell and Chip One Stop have stock available or on a lead time for LT3991EMSE-5#PBF.

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