Features and Benefits
- UltraFast™ Transient Response Eliminates Tantalum and Electrolytic Output Capacitors
- FET RDS(ON) Defines Dropout Voltage
- 1% Reference/Output Voltage Tolerance 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, overvoltage 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.
- Pentium® Processor Supplies
- PowerPC™ Supplies
- 5V to 3.XXV or 3.3V to 2.XXV Microprocessor Supplies
- GTL Termination
- Low Voltage Logic Supplies
Markets and Technologies
Product Lifecycle Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Evaluation Kits (1)
Documentation & Resources
R338 Reliability Data3/22/201820 K
AN84 - Linear Technology Magazine Circuit Collection, Volume IV8/20/20072M
AN70 - A Monolithic Switching Regulator with 100µV Output Noise8/20/20071M
AN69 - LT1575 UltraFast Linear Controller Makes Fast Transient Response Power Supplies8/20/2007218K
DC136A - Demo Manual9/24/2009746K
Linear Low Dropout (LDO) Regulator Solutions4/17/20183 M
Power Supply Tracking for Linear Regulators11/1/2004 LT Journal
VID Voltage Programmer for Intel Mobile Processors8/1/1998 LT Journal
Tools & Simulations
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.