LTC1911
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LTC1911

Low Noise, High Efficiency, Inductorless Step-Down DC/DC Converter

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $3.08
Features
  • Low Noise Constant Frequency Operation
  • 2.7V to 5.5V Input Voltage Range
  • No Inductors
  • Typical Efficiency 25% Higher Than LDOs
  • Shutdown Disconnects Load from VIN
  • Output Voltage: 1.8V ±4% or 1.5V ±4%
  • Output Current: 250mA
  • Low Operating Current: IIN = 180µA Typ
  • Low Shutdown Current: IIN = 10µA Typ
  • Oscillator Frequency: 1.5MHz
  • Soft-Start Limits Inrush Current at Turn On
  • Short-Circuit and Overtemperature Protected
  • Available in an 8-Pin MSOP Package
Additional Details
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The LTC1911 is a switched capacitor step-down DC/DC converter that produces a 1.5V or 1.8V regulated output from a 2.7V to 5.5V input. The part uses switched capacitor fractional conversion to achieve high efficiency over the entire input range. No inductors are required. Internal circuitry controls the step-down conversion ratio to optimize efficiency as the input voltage and load conditions vary. Typical efficiency is over 25% higher than that of a linear regulator.

A unique constant frequency architecture provides a low noise regulated output as well as lower input noise than conventional charge pump regulators. High frequency operation (fOSC = 1.5MHz) simplifies output filtering to further reduce conducted noise. To optimize efficiency,the part enters Burst Mode® operation under light load conditions.

Low operating current (180µA with no load, 10µA in shutdown) and low external parts count (two 1µF flying capacitors and two 10µF bypass capacitors) make the LTC1911 ideally suited for space constrained battery powered applications. The part is short-circuit and over temperature protected, and is available in an 8-pin MSOP package.

Applications

  • Handheld Computers
  • Cellular Phones
  • Smart Card Readers
  • Portable Electronic Equipment
  • Handheld Medical Instruments
  • Low Power DSP Supplies
Part Models 4
1ku List Price Starting From $3.08

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC1911EMS8-1.5#PBF
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LTC1911EMS8-1.5#TRPBF
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LTC1911EMS8-1.8#PBF
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LTC1911EMS8-1.8#TRPBF
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Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LTC1911EMS8-1.5#PBF

PRODUCTION

LTC1911EMS8-1.5#TRPBF

PRODUCTION

LTC1911EMS8-1.8#PBF

PRODUCTION

LTC1911EMS8-1.8#TRPBF

PRODUCTION

Feb 3, 2020

- 20_0128

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LTC1911EMS8-1.5#PBF

PRODUCTION

LTC1911EMS8-1.5#TRPBF

PRODUCTION

LTC1911EMS8-1.8#PBF

PRODUCTION

LTC1911EMS8-1.8#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LTC1911EMS8-1.5#PBF

PRODUCTION

LTC1911EMS8-1.5#TRPBF

PRODUCTION

LTC1911EMS8-1.8#PBF

PRODUCTION

LTC1911EMS8-1.8#TRPBF

PRODUCTION

Feb 3, 2020

- 20_0128

arrow down

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LTC1911EMS8-1.5#PBF

PRODUCTION

LTC1911EMS8-1.5#TRPBF

PRODUCTION

LTC1911EMS8-1.8#PBF

PRODUCTION

LTC1911EMS8-1.8#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC342A-B

LTC1911EMS8-1.5 | Low Noise, Constant Frequency Step-Down Charge Pump

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DC342A-A

LTC1911EMS8-1.8 | Low Noise, Constant Frequency Step-Down Charge Pump

Tools & Simulations

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

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