MAX77231EZL+

MAXIM INTEGRATED PRODUCTS MAX77231EZL+ DC-DC Switching Boost Regulator, Adjustable, 2.75V-4.8V in, 11.2V-16.2V out, 10mA, WLP-9 New

The is a 2.75V to 4.8V input, 10mA output, 35µVRMS ultra-low noise boost regulator in 9 pin WLP package. The MAX77231 is optimized for boost applications, requiring very low ripple/noise and small PCB space. Output ripple and noise are suppressed to 35µVRMS in 1MHz BW by a PMOS linear post-regulator set 0.5V below the boost regulator output to reject noise while optimizing efficiency. The boost regulator operates using a 1µH/400mA inductor and 2.2µF output capacitance. Fast transient response and stable operation are guaranteed using a current-limited PFM architecture. A PMOS low-noise linear post-regulator attenuates boost converter ripple by ~50dB 10MHz BW before delivering 11.2V to the load. Other output voltages up to 16.2V can be factory set. The LDO also disconnects the load from the boost during shutdown allowing the output to fall to 0V true shutdown. Active discharge can also be activated.

.

Ultra small solution size is < 7mm²

.

11.2V/10mA output

.

Output factory trimmable from 11.2V to 16.2V

.

125µA no load supply current output on less than 1µA shutdown supply current

.

True shutdown load disconnect

.

Selectable active discharge