LTC1622
PRODUCTIONLow Input Voltage Current Mode Step-Down DC/DC Controller
- Part Models
- 6
- 1ku List Price
- Starting From $3.43
Overview
- High Efficiency
- Constant Frequency 550kHz Operation
- VIN Range: 2V to 10V
- Multiampere Output Currents
- OPTI-LOOP™ Compensation Minimizes COUT
- Selectable, Burst Mode Operation
- Low Dropout Operation: 100% Duty Cycle
- Synchronizable up to 750kHz
- Current Mode Operation for Excellent Line and Load Transient Response
- Low Quiescent Current: 350µA
- Shutdown Mode Draws Only 15µA Supply Current
- ±1.9% Reference Accuracy
- Available in 8-Lead MSOP
The LTC1622 is a constant frequency current mode step-down DC/DC controller providing excellent AC and DC load and line regulation. The device incorporates an accurate undervoltage feature that shuts the LTC1622 down when the input voltage falls below 2V.
The LTC1622 boasts a ±1.9% output voltage accuracy and consumes only 350µA of quiescent current. For applications where efficiency is a prime consideration and the load current varies from light to heavy, the LTC1622 can be configured for Burst Mode™ operation. Burst Mode operation enhances low current efficiency and extends battery run time. Burst Mode operation is inhibited during synchronization or when the SYNC/MODE pin is pulled low to reduce noise and possible RF interference.
High constant operating frequency of 550kHz allows the use of a small inductor. The device can also be synchronized up to 750kHz for special applications. The high frequency operation and the available 8-lead MSOP package create a high performance solution in an extremely small amount of PCB area.
To further maximize the life of the battery source, the P-channel MOSFET is turned on continuously in dropout (100% duty cycle). In shutdown, the device draws a mere 15µA.
Applications
- 1- or 2-Cell Li-Ion Powered Applications
- Cellular Telephones
- Wireless Modems
- Portable Computers
- Distributed 3.3V, 2.5V or 1.8V Power Systems
- Scanners
- Battery-Powered Equipment
Documentation
Data Sheet 1
User Guide 1
Application Note 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 |
|---|---|---|---|
| LTC1622CMS8#PBF | 8-Lead MSOP | ||
| LTC1622CMS8#TRPBF | 8-Lead MSOP | ||
| LTC1622CS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1622CS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1622IS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LTC1622IS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LTC1622CMS8#PBF | PRODUCTION | |
| LTC1622CMS8#TRPBF | PRODUCTION | |
|
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| LTC1622CS8#PBF | PRODUCTION | |
| LTC1622CS8#TRPBF | PRODUCTION | |
| LTC1622IS8#PBF | PRODUCTION | |
| LTC1622IS8#TRPBF | PRODUCTION | |
|
Dec 14, 2023 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LTC1622CS8#PBF | PRODUCTION | |
| LTC1622CS8#TRPBF | PRODUCTION | |
|
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LTC1622CS8#PBF | PRODUCTION | |
| LTC1622CS8#TRPBF | PRODUCTION | |
| LTC1622IS8#PBF | PRODUCTION | |
| LTC1622IS8#TRPBF | PRODUCTION | |
|
Oct 12, 2022 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LTC1622IS8#PBF | PRODUCTION | |
| LTC1622IS8#TRPBF | PRODUCTION | |
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/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2974 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement |
| Switching Regulators & Controllers 1 | ||
| LTC3880 | RECOMMENDED FOR NEW DESIGNS | Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC1622
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
LTC1622MS8 | Low Input Voltage Current Mode Step-Down DC/DC Converter, 2 to 8 VIN, 1.8, 2.5, or 3.3 VOUT @ 800mA
Resources
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