AM9108

TINY PACKAGE HIGH EFFICIENCY STEP-UP DC/DC CONVERTER „ Introduction The AM9108/9 is a CMOS step-up switching DC/DC converter that mainly consists of a reference voltage source, an oscillator, and a comparator. The G908/9 allows the duty ratio to be automatically switched according to the load (light load: 50%, high output current: 75%), enabling products with a low ripple over a wide range, high efficiency, and high output current. With the G908/9, a step-up switching DC/DC converter can be configured by using an external coil, capacitor, diode and NMOS or NPN. The built-in MOSFET is turned off by a protection circuit when the voltage at the LX pin exceeds the limit to prevent it from being damaged. This feature, along with the mini package and low current consumption, makes the G908/9 ideal for applications such as the power supply unit of portable equipment. AM9108/9 „ Features Low voltage operation: Startup at 0.9 V min. (IOUT = 1 mA) guaranteed Duty ratio: 66/78%, builti...