LM48557TLX

• Integrated charge pump
• Bridged load output
• Differential input
• High PSRR
• I 2 C-amount and mode control
• Reset the input
• Advanced click and pop suppression
• Low supply current
• Minimal external components
• Micropower shutdown
• Available in a space-saving 16-ball micro SMD package

illustrate

The LM48557 is a single-supply, mono, ceramic speaker driver with integrated charge pump designed for use in portable devices such as cell phones and portable media players where board space is at a premium. The LM48557 charge pump allows the device to deliver 5.8V from a single 4.2V supply_RMS。

The LM48557 has a high power supply rejection ratio (PSRR) of 80 dB at 217Hz, allowing the device to operate in noisy environments without additional power conditioning. Flexible power requirements allow operation from 2.7V to 4.5V. The LM48557 has a low valid reset input device that returns to its default state. In addition, the LM48557 has 36 steps for me 2 C quantity control and mute function. A low-power shutdown mode consumes 0.01μA of supply current.

The LM48557's superior click-and-pop suppression eliminates power-up/down and audible transient noise when off. The LM48557 is available in an ultra-small 16-ball micro SMD package (1.965mmx1.965mm).

Main specifications

apply

• cell phone
• Pocket PC
• Laptop electronics
• MP3 player