DATA SHEET
AAT5101
2.5W Mono Filter-Free Class D Audio Power Amplifier
Description
The AAT5101 is a high efficiency, 2.5W mono class D
audio power amplifier. The low noise, filterless PWM
architecture eliminates the output filter, reduces the
external component count and system cost, and simpli-
fies system design. With high efficiency of up to 92% and
the industry lowest 1.35mA quiescent current, it increas-
es battery lifetime and dramatically lowers the junction
temperature. The space saving wafer-level chip scale
package (WLCSP) and minimum external component
requirements make it ideal for cellular phones and
PDAs.
With high PSRR, low THD+N, and 91dB SNR, the
AAT5101 guarantees clean sound across the wide audio
output power range and the full audio frequency domain.
Short circuit and thermal protection with self-recovery
prevents the device from being damaged during over
current conditions.
In cellular phones, the earpiece, speaker phone and
melody ringer can each be driven by the AAT5101. Also,
proprietary technology successfully suppresses pop and
click noise.
Typical Application
Features
• Maximum Battery Life and Minimum Heat
▪ 1.35mA Quiescent Current
▪ 0.06μA Shutdown Current
▪ Up to 92% Efficiency
• Large Output Power Capabilities
▪ 1.35W with 8Ω Load and THD+N < 1%
▪ 2.5W with 4Ω Load and THD+N < 10%
• Pop and Click Noise Suppression Circuitry
• Thermal and Output Short Circuit Protection with Self-
recovery
• High Performance, THD+N of 0.12% at 5V, 8Ω Load
and POUT = 1.0W
• Filter-less Capability
• Internally Generated 250 kHz Switching Frequency
• Excellent PSRR and Wide Supply Voltage Range (2.1V
to 5.5V)
• Fully Differential Design
• External Gain Configuration Capability
• 9-Pin Wafer-Level Chip Scale Packaging (WLCSP)
Applications
• Cellular Phones
• MP4s
• Notebook Computers
• PDAs
• Portable DVD Players
To Battery
CS
+ RI IN -
Differential
input
- RI IN +
-
+
VDD
PWM
VO+
H- Bridge
VO -
RL
SHUTDOWN
Shutdown Control
GND
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201876B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • April 25, 2012
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