LT1377
PRODUCTION500kHz and 1MHz High Efficiency 1.5A Switching Regulators
- Part Models
- 4
- 1ku List Price
- Starting From $6.64
Overview
- Faster Switching with Increased Efficiency
- Uses Small Inductors: 4.7µH
- All Surface Mount Components
- Only 0.5 Square Inch of Board Space
- Low Minimum Supply Voltage: 2.7V
- Quiescent Current: 4mA Typ
- Current Limited Power Switch: 1.5A
- Regulates Positive or Negative Outputs
- Shutdown Supply Current: 12µA Typ
- Easy External Synchronization
- 8-Pin SO or PDIP Packages
The LT1372/LT1377 are monolithic high frequency switching regulators. They can be operated in all standard switching configurations including boost, buck, flyback, forward, inverting and "Cuk." A 1.5A high efficiency switch is included on the die, along with all oscillator, control and protection circuitry. All functions of the LT1372/LT1377 are integrated into 8-pin SO/PDIP packages.
The LT1372/LT1377 typically consumes only 4mA quiescent current and has higher efficiency than previous parts. High frequency switching allows for very small inductors to be used. All surface mount components consume less than 0.5 square inch of board space.
New design techniques increase flexibility and maintain ease of use. Switching is easily synchronized to an external logic level source. A logic low on the shutdown pin reduces supply current to 12µA. Unique error amplifier circuitry can regulate positive or negative output voltage while maintaining simple frequency compensation techniques. Nonlinear error amplifier transconductance reduces output overshoot on start-up or overload recovery. Oscillator frequency shifting protects external components during overload conditions.
Applications
- Boost Regulators
- CCFL Backlight Driver
- Laptop Computer Supplies
- Multiple Output Flyback Supplies
- Inverting Supplies
Documentation
Data Sheet 1
User Guide 1
Application Note 2
Design Note 2
Spec Notice 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 |
|---|---|---|---|
| LT1377CS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1377CS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1377IS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1377IS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Dec 14, 2023 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2) |
||
| LT1377CS8#PBF | PRODUCTION | |
| LT1377CS8#TRPBF | PRODUCTION | |
|
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM |
||
| LT1377CS8#PBF | PRODUCTION | |
| LT1377CS8#TRPBF | PRODUCTION | |
| LT1377IS8#PBF | PRODUCTION | |
| LT1377IS8#TRPBF | PRODUCTION | |
|
Nov 14, 2022 - 22_0254 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2) |
||
| LT1377IS8#PBF | PRODUCTION | |
| LT1377IS8#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
Tools & Simulations
LTspice 2
- LT1377 Demo Circuit - 1MHz High Efficiency 1.5A Switching Regulator (5V to 12V @ 350mA)
- LT1377 Demo Circuit - 1MHz High Efficiency 1.5A Switching Regulators (5V to 12V @ 250mA)
Models for the following parts are available in LTspice:
- LT1377
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
LT1377CS8 | 1MHz DC/DC Converter with Shutdown and Synchronous, 5-11VIN, 12VOUT at 250mA