Intersil introduced the ISL80102 and ISL80103 chips which are low voltage, high-current, single output LDOs specified for 2A and 3A output current. ISL80102 and ISL80103 operate from an input voltages of 2.2V to 6V and are capable of providing output voltages of 0.8V to 5V on the adjustable VOUT versions or a fixed output voltage available in 0.8V, 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and 5V.
The the ISL80102 and ISL80103main features are : 0.5% initial VOUT Accuracy , Designed for 2.2V to 6V Input Supply , ±1.8% Guaranteed VOUT Accuracy for Junction Temperature Range from -40°C to +125°C , 185mV Dropout @ 3A, 125mV Dropout @ 2A , Fast Load Transient Response , Rated Output Current Options of 2A and 3A , Adjustable In-Rush Current Limiting , Fixed and Adjustable VOUT Options Available , 65dB Typical PSRR , Output Noise of 100μVRMS between 300Hz to 300kHz , 900mV Enable Input Threshold , Short-Circuit Current Protection , 1A Peak Reverse Current , Over-Temperature Shutdown .
The ISL80102 and ISL80103 require few external components to finish the design and are veary easy to use in many applications like : DSP, FPGA and μP Core Power Supplies , Noise-Sensitive Instrumentation Systems ,Post Regulation of Switched Mode Power Supplies ,Medical Equipment , Telecommunications and Networking Equipment and many other applications .
If is used the adjustable version the output voltage can be programmed to any level between 0.8V
and 5V using an external resistor divider R1 and R2 Equation 1 . The recommended value for R2 is 500Ωto 1kΩ. R1 is then must be chosen according to Equation 2: