A840中文资料ALLEGRO数据手册PDF规格书

LOW-DROPOUT REGULATORS — HIGH EFFICIENCY

Designed specifically to meet the requirement for extended operation of battery-powered equipment such as cordless and cellular telephones, the A8405SLH voltage regulators offer the reduced dropout voltage and quiescent current essential for maximum battery life. Applicable also to palmtop computers and personal data assistants, these devices deliver a regulated output at up to 200 mA (transient), which is internally limited, providing short-circuit protection. Regulated output voltages of 2.7, 2.8, 3.0, 3.2, 3.3, 3.6, 3.8, 4.0, and 5.0 V

are currently provided. Other voltages, down to 2.0 volts, are available on special order.

FEATURES AND BENEFITS

■High Efficiency Provides Extended Battery Life

■100 mV Typical Dropout Voltage at IO= 100 mA

■80 µA Typical Quiescent Current

■Low Output Noise

■200 mA Current-Limited Output

■Improved PSRR and Transient Performance

APPLICATIONS

■Cordless/Cellular/GSM/PHS Telephones

■Personal Data Assistants

■Personal Communicators

■Palmtop Computers

■GPS

■Pagers