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This literature is subject to all applicable copyright laws and is not for resale in any manner.FAB1200 Ground-Referenced Class-G Headphone Amplifier with Integrated Buck Converter June 2013 FAB1200 Class-G Ground-Referenced Headphone Amplifier with Integrated Buck Converter Features Description The FAB1200 is a stereo class-G headphone Class-G Headphone Amplifier Uses Multiple amplifier. A charge pump generates a negative supply Rails for High Efficiency voltage that allows its output to be ground centered. Integrated Inductive Buck Converter for Direct An integrated buck regulator adjusts the voltage Battery Connection supplies between two different levels based on the output signal level to reduce power consumption. Differential Analog Inputs Capable of Driving 16 to 600 Loads and Line Level Inputs V BATT 2.2H 2.2F Ground-Referenced Output 2.2F Ground-Sense Input Eliminates Ground-Loop AV SW HPV DD DD Noise CPN 2 Buck Charge 2.2F I C Controls CPP Converter Pump HPV SS 32-Step Volume Control INR- 2.2F 1F Channel-Independent Shutdown Control OUTR INR+ and Short-Circuit Protection Volume Class G 1F Control and Headphone Level Amplifiers 16-Bump, 0.4 mm Pitch, 1.56 mm x 1.56 mm INL- Detector OUTL 1F WLCSP Package SGND INL+ 1F Applications SCL 2 I C SDA Cellular Handsets AGND MP3 and Portable Media Players Personal Navigation Devices Figure 1. Typical Application Circuit Ordering Information Operating Part Number Package Packing Method Temperature Range 16-Bump, 0.4 mm Pitch, 1,56 mm x 1.56 mm, 4000 Units on FAB1200UCX -40 to +85C Wafer-Level Chip-Scale Package (WLCSP) Tape & Reel 2010 Fairchild Semiconductor Corporation www.fairchildsemi.com FAB1200 Rev 1.2.7