1FEATURES
2• Integrated Charge Pump
• Bridge-Tied Load Output
• High PSRR
• I2C Volume and Mode Control
• Reset Input
• Advanced Click-and-Pop Suppression
• Low Supply Current
• Minimum External Components
• Micro-Power Shutdown
• Available in Space-Saving 16-Bump DSBGA
Package

APPLICATIONS
• Cell Phones
• Smart Phones
• Portable Media Devices
• Notebook PCs

KEY SPECIFICATIONS
• Output Voltage at VDD = 4.2V, RL = 2.2μF + 15Ω
THD+N ≤ 1%: 5.4VRMS (typ)
• Quiescent Power Supply Current at 4.2V:
3.3mA (typ)
• PSRR at 217Hz: 93dB (typ)
• Shutdown Current: 0.01μA (typ)

DESCRIPTION
The LM48823 is a single supply, mono, ceramic
speaker driver with an integrated charge-pump,
designed for portable devices, such as cell phones,
where board space is at a premium. The LM48823
charge pump allows the device to deliver 5.4VRMS
from a single 4.2V supply.
The LM48823 features high power supply rejection ratio (PSRR), 93dB at 217Hz, allowing the device to
operate in noisy environments without additional
power supply conditioning. Flexible power supply
requirements allow operation from 2.0V to 4.5V. The
LM48823 features an active low reset input that
reverts the device to its default state. Additionally, the
LM48823 features a 32-step I2C volume control. The
low power Shutdown mode reduces supply current
consumption to 0.01μA.
The LM48823’s superior click and pop suppression
eliminates audible transients on power-up/down and
during shutdown. The LM48823 is available in an
ultra-small 16-bump DSBGA package (2mmx2mm).