LTC1911
LTC1911
LAST TIME BUYLow Noise, High Efficiency, Inductorless Step-Down DC/DC Converter
- Part Models
- 4
- 1ku List Price
- Starting From $3.90
Viewing:
Overview
- 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
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
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC1911EMS8-1.5#PBF | 8-Lead MSOP | ||
| LTC1911EMS8-1.5#TRPBF | 8-Lead MSOP | ||
| LTC1911EMS8-1.8#PBF | 8-Lead MSOP | ||
| LTC1911EMS8-1.8#TRPBF | 8-Lead MSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package |
||
| LTC1911EMS8-1.5#PBF | ||
| LTC1911EMS8-1.5#TRPBF | ||
| LTC1911EMS8-1.8#PBF | ||
| LTC1911EMS8-1.8#TRPBF | ||
|
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC1911EMS8-1.5#PBF | ||
| LTC1911EMS8-1.5#TRPBF | ||
| LTC1911EMS8-1.8#PBF | ||
| LTC1911EMS8-1.8#TRPBF | ||
|
Jul 29, 2026 - 26_0046 Discontinuation of Parts Manufactured in TSMC Fab 2 and 5 in Hsinchu, Taiwan. |
||
| LTC1911EMS8-1.5#PBF | ||
| LTC1911EMS8-1.5#TRPBF | ||
| LTC1911EMS8-1.8#PBF | ||
| LTC1911EMS8-1.8#TRPBF | ||
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareTools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC1911-1.5
- LTC1911-1.8
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.
Evaluation Kits
Latest Discussions
No discussions on LTC1911 yet. Have something to say?
Start a Discussion on EngineerZone®