PAM2322AGEAR

The Diodes Incorporated PAM2322AGEAR is a dual step-down current-mode, DC-DC converter. At heavy load, the constant-frequency PWM control performs with excellent stability and transient response. To ensure the longest battery life in portable applications, the PAM2322AGEAR provides a power-saving pulse-skipping modulation (PSM) mode to reduce quiescent current under light load operation. The PAM2322AGEAR supports a range of input voltages from 2.7 V to 5.5 V, allowing the use of a single Li+/Li-polymer cell, multiple alkaline/NiMH cell, USB, and other standard power sources. Output 1 is a 1.8 V fixed output. Output 2 is adjustable from 0.9 V to VIN. Both outputs employ an internal power switch and synchronous rectifier to minimize external part count and realize high efficiency. Output 1 delivers up to 1000 mA output current while output 2 delivers up to 2000 mA. Each regulator has an independent enable pin. Each output of the PAM2322AGEAR can be disabled when a logic low is applied to the channel enable pin. During shutdown, the input is disconnected from the output and the shutdown current is less than 0.1 μA. Other key features include under-voltage lockout, soft-start, hiccup-mode short circuit protection and thermal shutdown.