LTC1771
PRODUCTION10µA Quiescent Current High Efficiency Step-Down DC/DC Controller
- Part Models
- 6
- 1ku List Price
- Starting From $4.23
Overview
- Very Low Standby Current: 10µA
- Available in Space-Saving 8-Lead MSOP Package
- Output Currents: Up to 5A
- Wide VIN Range: 2.8V to 20V Operation
- VOUT Range: 1.23V to 18V
- High Efficiency: Over 93% Possible
- ±2% Output Accuracy
- Very Low Dropout Operation: 100% Duty Cycle
- Current Mode Operation for Excellent Line and Load Transient Response
- Defeatable Burst Mode™ Operation
- Short-Circuit Protected
- Optional Programmable Soft-Start
- Micropower Shutdown: IQ = 2µA
The LTC1771 is a high efficiency current mode step-down DC/DC controller that draws as little as 10µA DC supply current to regulate the output at no load while maintaining high efficiency for loads up to several amps.
The LTC1771 drives an external P-channel power MOSFET using a current mode, constant off-time architecture. An external sense resistor is used to program the operating current level. Current mode control provides short-circuit protection, excellent transient response and controlled start-up behavior. Burst Mode operation enables the LTC1771 to maintain high efficiency down to extremely low currents. Shutdown mode further reduces the supply current to a mere 2µA. For low noise applications, Burst Mode operation can be easily disabled with the MODE pin.
Wide input supply range of 2.8V to 18V (20V maximum) and 100% duty cycle operation for low dropout make the LTC1771 ideal for a wide variety of battery-powered applications where maximizing battery life is important.
The LTC1771’s availability in both 8-lead MSOP and SO packages provides for a minimum area solution.
Applications
- Cellular Telephones and Wireless Modems
- 1- to 4-Cell Lithium-Ion-Powered Applications
- Portable Instruments
- Battery-Powered Equipment
- Battery Chargers
- Scanners
Documentation
Data Sheet 1
Design Note 1
Technical Articles 2
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 |
|---|---|---|---|
| LTC1771EMS8#PBF | 8-Lead MSOP | ||
| LTC1771EMS8#TRPBF | 8-Lead MSOP | ||
| LTC1771ES8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1771ES8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1771IS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1771IS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 5, 2024 - 24_0004 Epoxy Change from Henkel 8290 to 8290A for MSOP (3) |
||
| LTC1771EMS8#PBF | PRODUCTION | |
| LTC1771EMS8#TRPBF | PRODUCTION | |
|
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC1771EMS8#PBF | PRODUCTION | |
| LTC1771EMS8#TRPBF | PRODUCTION | |
|
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| LTC1771ES8#PBF | PRODUCTION | |
| LTC1771ES8#TRPBF | PRODUCTION | |
| LTC1771IS8#PBF | PRODUCTION | |
| LTC1771IS8#TRPBF | PRODUCTION | |
|
Dec 14, 2023 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LTC1771ES8#PBF | PRODUCTION | |
| LTC1771ES8#TRPBF | PRODUCTION | |
| LTC1771IS8#PBF | PRODUCTION | |
| LTC1771IS8#TRPBF | PRODUCTION | |
|
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LTC1771ES8#PBF | PRODUCTION | |
| LTC1771ES8#TRPBF | PRODUCTION | |
| LTC1771IS8#PBF | PRODUCTION | |
| LTC1771IS8#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
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Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC1771
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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