MAX8952: 2.5A step-down converter allows application processors to run at maximum clock speed in handheld applications

This device achieves extremely tight output-voltage accuracy by integrating a highly precise bandgap reference and by minimizing offset errors in the feedback circuit. Fully differential remote sense ensures precise regulation at the load by eliminating the resistive losses associated with PCB trace impedance. Additionally, the MAX8952 operates from an input supply as low as 2.5V to extend device operating time and to support a wide range of battery chemistries.

This highly flexible step-down converter features an I2C interface that enables dynamic voltage scaling and allows programming of the output voltage between 770mV and 1.40V in 10mV steps. The MAX8952 operates either in fixed-frequency (3.25MHz) PWM mode or in power-save mode. It can also be synchronized to an external system clock to ease EMI reduction.

To simplify programming, the MAX8952 provides two logic controls to facilitate selection among four predefined power-management states. For each state, the user can individually program the output voltage, mode of operation (PWM or power save), and external clock synchronization (on/off). Other features include output overvoltage and overcurrent protection, thermal shutdown, soft-start, and an ultra-low 1microamp (max) shutdown current.