Voice-switched Speakerphone Circuit with built in loudspeaker amplifier

Description. The PBL 388 13 contains all the necessary circuitry, amplifiers, detectors, comparator and control functions to implement a high performance, voice-switched, loudspeaking, ”hands-free ” telephone. The gain dynamics (attenuation between channels) is selectable (25dB or 50dB) via a sep

12 A synchronous Buck regulator

Features  Wide Input Voltage Range: 4 V to 16 V with internal bias and 2.7 V to 16 V with external VCC (3.3 V)  Precision Reference Voltage (0.9 V +/- 0.5%)  Stable with Ceramic Output Capacitors  No External Compensation  Optional Forced Continuous Conduction Mode and Diode Emulatio