Analog Devices are configured with the EVAL-LT3073-AZ evaluation board to evaluate the running of the LT3073. The LT3073 is a 3A, ultra-low noise, high power suppression ratio (PSRR), 45mV drop voltage ultra-fast linear regulator.

 

The EVAL-LT3073-AZ requires external bias (VBIAS) to be at least 1.2V higher than VOUT and between 2.375V and 5.5V. The ADI LT3073 on the EVAL-LT3073-AZ requires few external components, simplifying the circuit design.

 

Careful printed circuit board (PCB) design helps optimize noise, PSRR, load transient response, and VOUT adjustment performance. At the same time, the LT3073 requires capacitors for internal reference, power input, BIASF pins, and power output. Internal reference uses 16V, 0805 size, 4.7μF capacitor bypass to reduce output noise and program soft start.

 

The larger capacitor housing size and higher voltage rating reduce the noise of an otherwise identical capacitor by 1/f. The 22μF capacitor at the output of the circuit is used for high frequency PSRR performance and minimizes VOUT deviation during load transients.

 

● Input voltage range of 0.6V to 5.5V
● 2.375V to 5.5V offset voltage range
● 0.5V to 4.2V jumper program output voltage according to selection matrix
● 3A Maximum output current
● BNC connectors for noise and PSRR measurement
● Jumpers and resistors in combination choose 3.72A or 1.5A output current limit and corresponding monitoring or disable programming current limit and monitoring
● The jumper turns on or off the regulator
● Terminals provide output current, temperature, and output regulation status monitoring
● ±2.5% jumper to marginal output voltage
● The LT3073's VIOC pins manage power consumption and PSRR
● Banana jack minimizes VIN and VOUT connection voltage drop
● VO+, VO−, and VI+ terminals are used for regulation and drop-out monitoring
●Thermal enhanced, 22 leads, 3mm x 4mm x 0.95mm, LQFN package

 

● Dc power supply
● Multimeter for voltage and current measurement
● Electronic or resistive load