A8205SLH中文資料ALLEGRO數(shù)據(jù)手冊PDF規(guī)格書

Designed specifically to meet the requirement for extended operation of battery-powered equipment such as cordless and cellular telephones, the A8205SLH 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 limited only by package power dissipation. Regulated output voltages of 2.7, 2.8, 3.0, 3.3, 3.6, 4.0, and 5.0 V are currently provided. Other voltages, down to 2.0 volts, are available on special order.

A PMOS pass element provides a typical dropout voltage of only 75 mV at 100 mA of load current. The low dropout voltage permits deeper battery discharge before output regulation is lost. Quiescent current does not increase significantly as the dropout voltage is approached, an ideal feature in standby/resume power systems where data integrity is crucial. Regulator accuracy and excellent temperature characteristics are provided by a bandgap reference. The A8205SLH includes an ENABLE input to give the designer complete control over power up, standby, or power down.

These devices are supplied in a thermally enhanced 5-lead small outline plastic package similar to the SOT-23, and fitting the SC-74A footprint. All devices are rated for operation over a temperature range of -20°C to +85°C.

FEATURES AND BENEFITS

■ High Efficiency Provides Extended Battery Life

■ 75 mV Typical Dropout Voltage at IO = 100 mA

■ 55 μA Typical Quiescent Current

Less Than 1 μA “Sleep” Current

■ Low Output Noise

■ 200 mA Peak Output Current

■ Improved PSRR and Transient Performance

APPLICATIONS

■ Cordless and Cellular Telephones

■ Personal Data Assistants

■ Personal Communicators

■ Palmtop Computers