ADI ADP2504ACPZ-3.3-R7

Шаг вверх/шаг внизBuck-Boost2.3V5.5V1A

Overview

The ADP2503/ADP2504ACPZ-3.3-R7 are high efficiency, low quiescent current step-up/step-down dc-to-dc converters that can operate at inputvoltages greater than, less than, or equal to the regulated output voltage. The power switches and synchronous rectifiers areinternal to minimize external part count. At high load currents, the ADP2503/ADP2504ACPZ-3.3-R7 use a current-mode, fixed frequencypulse-width modulation (PWM) control scheme for optimalstability and transient response. To ensure the longest battery life in portable applications, the ADP2503/ADP2504ACPZ-3.3-R7 have an optional power save mode that reduces the switching frequency underlight load conditions. For wireless and other low noise applications where variable frequency power save mode may causeinterference, the logic control input sync forces fixed frequencyPWM operation under all load conditions.

During logic-controlled shutdown, the input is disconnected from the output and draws less than 1 μA from the input source. Operating as boost converters, the ADP2503/ADP2504ACPZ-3.3-R7 feature a true load disconnect function that isolates the load from the power source. Other key features include undervoltage lockout to prevent deep battery discharge, and soft start to prevent input current overshoot at startup.

Features