LM48557TLX

• Integrated charge pump
• Bridged load output
• Differential input
• High PSRR
• I 2 C quantity 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-bump micro SMD package

illustrate

LM48557 are single-powered, mono, ceramic speaker drivers with integrated charge pumps designed for use in portable devices such as mobile phones and portable media players, where board space is at a premium. LM48557 charge pump allows the unit to deliver 5.8V RMS from a single 4.2V supply.

LM48557 has a high power rejection ratio (PSRR) of 80 dB at 217Hz, allowing the device to operate in noisy environments without the need for additional power regulation. Flexible power requirements allow operation from 2.7V to 4.5V. LM48557 devices with low effective reset inputs revert to their default state. In addition, LM48557 has 36 steps me 2 C amount of control and mute function. The low-power shutdown mode consumes 0.01μA of supply current.

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

Key specifications:

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• cell phone
• handheld computer
• Laptop electronics
• MP3 player