LT1376
PRODUCTION1.5A, 500kHz Step-Down Switching Regulators
- Part Models
- 24
- 1ku List Price
- Starting From $5.08
Overview
- Constant 500kHz Switching Frequency
- Uses All Surface Mount Components
- Inductor Size Reduced to 5μH
- Easily Synchronizable
- Saturating Switch Design: 0.4Ω
- Effective Supply Current: 2.5mA
- Shutdown Current: 20μA
- Cycle-by-Cycle Current Limiting
The LT1375/LT1376 are 500kHz monolithic buck mode switching regulators. A 1.5A switch is included on the die along with all the necessary oscillator, control and logic circuitry. High switching frequency allows a considerable reduction in the size of external components.
The topology is current mode for fast transient response and good loop stability. Both fixed output voltage and adjustable parts are available.A special high speed bipolar process and new design techniques achieve high efficiency at high switching frequency. Efficiency is maintained over a wide output current range by using the output to bias the circuitry and by utilizing a supply boost capacitor to saturate the power switch. A shutdown signal will reduce supply current to 20μA on both parts. The LT1375 can be externally synchronized from 580kHz to 900kHz with logic level inputs.
The LT1375/LT1376 fit into standard 8-pin PDIP and SO packages, as well as a fused lead 16-pin SO with much lower thermal resistance. Full cycle-by-cycle short-circuit protection and thermal shutdown are provided. Standard surface mount external parts are used, including the inductor and capacitors.
For low input voltage applications with 3.3V output, see LT1507. This is a functionally identical part that can operate with input voltages between 4.5V and 12V.
Applications
- Portable Computers
- Battery-Powered Systems
- Battery Charger
- Distributed Power
Documentation
Data Sheet 1
Design Note 2
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 Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 8, 2024 - 24_0234 Migrating Bottom Trace Code Marking to Top Side Laser Marking for PDIP Package |
||
| LT1376CN8#PBF | PRODUCTION | |
| LT1376CN8-5#PBF | PRODUCTION | |
| LT1376IN8#PBF | PRODUCTION | |
| LT1376IN8-5#PBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package |
||
| LT1376CN8#PBF | PRODUCTION | |
| LT1376CN8-5#PBF | PRODUCTION | |
| LT1376IN8#PBF | PRODUCTION | |
| LT1376IN8-5#PBF | PRODUCTION | |
|
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG] |
||
| LT1376CN8#PBF | PRODUCTION | |
| LT1376CN8-5#PBF | PRODUCTION | |
| LT1376IN8#PBF | PRODUCTION | |
| LT1376IN8-5#PBF | PRODUCTION | |
|
Oct 8, 2024 - 24_0236 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| LT1376CS#PBF | PRODUCTION | |
| LT1376CS#TRPBF | PRODUCTION | |
| LT1376HVCS#PBF | PRODUCTION | |
| LT1376HVCS#TRPBF | PRODUCTION | |
| LT1376HVIS#PBF | PRODUCTION | |
| LT1376HVIS#TRPBF | PRODUCTION | |
| LT1376IS#PBF | PRODUCTION | |
| LT1376IS#TRPBF | PRODUCTION | |
| LT1376IS8#PBF | PRODUCTION | |
| LT1376IS8#TRPBF | PRODUCTION | |
| LT1376IS8-5#PBF | PRODUCTION | |
| LT1376IS8-5#TRPBF | PRODUCTION | |
|
Oct 12, 2022 - 22_0252 Epoxy Change from Henkel 8290 to 8290A for 16-Lead SOIC Package |
||
| LT1376CS#PBF | PRODUCTION | |
| LT1376CS#TRPBF | PRODUCTION | |
| LT1376HVCS#PBF | PRODUCTION | |
| LT1376HVCS#TRPBF | PRODUCTION | |
| LT1376HVIS#PBF | PRODUCTION | |
| LT1376HVIS#TRPBF | PRODUCTION | |
|
Aug 6, 2022 - 22_0173 Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG] |
||
| LT1376CS#PBF | PRODUCTION | |
| LT1376CS#TRPBF | PRODUCTION | |
| LT1376HVCS#PBF | PRODUCTION | |
| LT1376HVCS#TRPBF | PRODUCTION | |
| LT1376HVIS#PBF | PRODUCTION | |
| LT1376HVIS#TRPBF | PRODUCTION | |
| LT1376IS#PBF | PRODUCTION | |
| LT1376IS#TRPBF | PRODUCTION | |
| LT1376IS8#PBF | PRODUCTION | |
| LT1376IS8#TRPBF | PRODUCTION | |
|
Nov 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LT1376CS#PBF | PRODUCTION | |
| LT1376CS#TRPBF | PRODUCTION | |
| LT1376IS#PBF | PRODUCTION | |
| LT1376IS#TRPBF | PRODUCTION | |
|
Nov 14, 2022 - 22_0254 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2) |
||
| LT1376CS8#PBF | PRODUCTION | |
| LT1376CS8#TRPBF | PRODUCTION | |
| LT1376CS8-5#PBF | PRODUCTION | |
| LT1376CS8-5#TRPBF | PRODUCTION | |
|
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LT1376CS8#PBF | PRODUCTION | |
| LT1376CS8#TRPBF | PRODUCTION | |
| LT1376CS8-5#PBF | PRODUCTION | |
| LT1376CS8-5#TRPBF | PRODUCTION | |
| LT1376HVCS8#PBF | PRODUCTION | |
| LT1376HVCS8#TRPBF | PRODUCTION | |
| LT1376HVIS8#PBF | PRODUCTION | |
| LT1376HVIS8#TRPBF | PRODUCTION | |
| LT1376IS8#PBF | PRODUCTION | |
| LT1376IS8#TRPBF | PRODUCTION | |
| LT1376IS8-5#PBF | PRODUCTION | |
| LT1376IS8-5#TRPBF | PRODUCTION | |
|
Dec 14, 2023 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LT1376HVCS8#PBF | PRODUCTION | |
| LT1376HVCS8#TRPBF | PRODUCTION | |
| LT1376HVIS8#PBF | PRODUCTION | |
| LT1376HVIS8#TRPBF | PRODUCTION | |
| LT1376IS8#PBF | PRODUCTION | |
| LT1376IS8#TRPBF | PRODUCTION | |
|
Oct 12, 2022 - 22_0254 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2) |
||
| LT1376IS#PBF | PRODUCTION | |
| LT1376IS#TRPBF | PRODUCTION | |
| LT1376IS8-5#PBF | PRODUCTION | |
| LT1376IS8-5#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT1376
- LT1376-5
- LT1376HV
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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