LT1577
LT1577
PRODUCTIONUltrafast Transient Response, Low Dropout Regulators Adjustable and Fixed
- Part Models
- 6
- 1ku List Price
- Starting From $7.02
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Overview
- UltraFast™ Transient Response Eliminates Tantalum and Electrolytic Output Capacitors
- FET RDS(ON) Defines Dropout Voltage
- 1% Reference/Output Voltage Tolerance Over Temperature
- Typical Load Regulation: 1mV
- High Side Sense Current Limit
- Multifunction Shutdown Pin with Latch off
The LT1575/LT1577 are single/dual controller ICs that drive low cost external N-channel MOSFETs as source followers to produce ultrafast transient response, low dropout voltage regulators.
The LT1575/LT1577 achieve unprecedented transient-load performance by eliminating expensive tantalum or bulk electrolytic output capacitors in the most demanding modern microprocessor applications. Precision-trimmed adjustable and fixed output voltage versions accommodate any required microprocessor power supply voltage. Selection of the N-channel MOSFET RDS(ON) allows very low dropout voltages to be achieved.
Unique protection features include a high side current limit amplifier that activates a fault protection timer circuit. A multifunction Shutdown pin provides either current limit time-out with latch off, over-voltage protection, thermal shutdown or a combination of these functions. The LT1575 is available in 8-pin SO or PDIP and the LT1577 is available in 16-pin narrow body SO.
Applications
- Pentium® Processor Supplies
- PowerPC™ Supplies
- 5V to 3.XXV or 3.3V to 2.XXV Microprocessor Supplies
- GTL Termination
- Low Voltage Logic Supplies
Documentation
Data Sheet 1
Application Note 2
Design Note 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 |
|---|---|---|---|
| LT1577CS-3.3/2.8#PBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1577CS-3.3/2.8#TRPBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1577CS-3.3/ADJ#PBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1577CS-3.3/ADJ#TRPBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1577CS-ADJ/ADJ#PBF | 16-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1577CS-ADJ/ADJ#TRPBF | 16-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 8, 2024 - 24_0236 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| LT1577CS-3.3/2.8#PBF | PRODUCTION | |
| LT1577CS-3.3/2.8#TRPBF | PRODUCTION | |
|
Oct 12, 2022 - 22_0252 Epoxy Change from Henkel 8290 to 8290A for 16-Lead SOIC Package |
||
| LT1577CS-3.3/2.8#PBF | PRODUCTION | |
| LT1577CS-3.3/2.8#TRPBF | PRODUCTION | |
| LT1577CS-3.3/ADJ#PBF | PRODUCTION | |
| LT1577CS-3.3/ADJ#TRPBF | PRODUCTION | |
| LT1577CS-ADJ/ADJ#PBF | PRODUCTION | |
| LT1577CS-ADJ/ADJ#TRPBF | PRODUCTION | |
|
Aug 6, 2022 - 22_0173 Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG] |
||
| LT1577CS-3.3/2.8#PBF | PRODUCTION | |
| LT1577CS-3.3/2.8#TRPBF | PRODUCTION | |
| LT1577CS-3.3/ADJ#PBF | PRODUCTION | |
| LT1577CS-3.3/ADJ#TRPBF | PRODUCTION | |
| LT1577CS-ADJ/ADJ#PBF | PRODUCTION | |
| LT1577CS-ADJ/ADJ#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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LTspice
Models for the following parts are available in LTspice:
- LT1577-2.8
- LT1577-3.3
- LT1577-ADJ
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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