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LINEAR TECHNOLOGY  LT3991EMSE-5#PBF  Buck (Step Down) Switching Regulator, Fixed, 4.3V-55V In, 5V And 1.2A Out, 2 MHz, MSOP-10

LINEAR TECHNOLOGY LT3991EMSE-5#PBF
Manufacturer Part No:
LT3991EMSE-5#PBF
Order Code:
2115867
Technical Datasheet:
See all Technical Docs

Image is for illustrative purposes only. Please refer to product description.

Product Overview

The LT3991EMSE-5#PBF 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 0.44R 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.
  • Ultralow quiescent current
  • Low ripple Burst Mode® operation
  • Adjustable switching frequency
  • Fast transient response
  • Power good flag
  • Soft-start capability
  • Internal compensation
  • 700nA Low shutdown current

Product Information

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
Packaging:
Cut Tape
Product Range:
-
Automotive Qualification Standard:
-
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (17-Dec-2015)

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Applications

  • Automotive
  • Power Management
  • Industrial
  • Portable Devices

Legislation and Environmental

Country of Origin:
United States

Country in which last significant manufacturing process was carried out

RoHS Compliant:
Yes
Tariff No:
85423990
Weight (kg):
.000136