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Technical content

Features

  • Maximum Battery Life and Minimum Heat ▪ 1.35mA Quiescent Current ▪ 0.06 μA Shutdown Current ▪ Up to 92% Efficiency
  • Large Output Power Capabilities ▪ 1.35W with 8 Ω Load and THD+N < 1% ▪ 2.5W with 4 Ω 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, 8 Ω Load and P OUT = 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 Typical Application RI RI Differential input PWM H-Bridge Shutdown Control SHUTDOWN GND VO+ VO - IN - IN + RL CS To Battery VDD

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 AAT5101 DATA SHEET 2.5W Mono Filter-Free Class D Audio Power Amplifier Pin Description Pin # Symbol Type Description A1 IN+ I Positive differential input. A2 GND I Analog ground. A3 VO- O Negative BTL output. B1 VDD I Analog power supply. B2 PVDD I Power supply for internal H-bridge stage. B3 GND I Analog ground. C1 IN- I Negative differential input. SHUTDOWN The device enters shutdown mode when a low level is applied on this pin. An internal 300kΩ will force the device into shutdown mode if no signal is applied to this pin. It also helps to save space and cost. C3 VO+ O Positive BTL output Pin Configuration WLCSP-9 (Top View) IN+. GND VO- VDD PVDD GND IN- SHUTDOWN VO+ A1 A2 A3 B1 B2 B3 C1 C2 C3

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 AAT5101 DATA SHEET 2.5W Mono Filter-Free Class D Audio Power Amplifier Absolute Maximum Ratings Symbol Description Max Units VDD Supply Voltage Active Mode 5.5 VShutdown Mode 6.0 IOUT Maximum Output Current 1.5 A TA Operating Ambient Temperature -40 to +85 °CTJ Maximum Junction Temperature 165 Latchup Current @ TA = 85°C > 200 mA Recommended Operating Conditions Symbol Description Min Max Units PVDD, VDD Supply Voltage 2.1 5.5 V TA Operating Temperature -40 85 °C Thermal Characteristics Symbol Description Value Units ΘJA Maximum Thermal Resistance1 120 °C/W PD Maximum Power Dissipation1,2 833 mW 1. Mounted on a FR4 board. 2. Derate 6.25mW/°C above 25°C.

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 AAT5101 DATA SHEET 2.5W Mono Filter-Free Class D Audio Power Amplifier

Electrical Characteristics

TA = 25°C unless otherwise noted. Symbol Characteristic Conditions Min Typ Max Units VDD Operating Supply Voltage T A = -40°C to +85°C 2.1 5.5 V IQ Supply Quiescent Current VDD = 5.5V, No Load 1.72 3.2 mAVDD = 3.6V, No Load 1.35 VDD = 2.1V, No Load 0.87 2.5 ISD Shutdown Current V DD = 2.1V to 5.5V 0.06 1 μA VSDIH Shutdown Voltage High V DD = 3.6V, TA = -40°C to 85°C 1.4 VVSDIL Shutdown Voltage Low V DD = 3.6V, TA = -40°C to 85°C 0.6 FSW Switching Frequency V DD = 2.1V to 5.5V 200 250 300 kHz G Ampli fi er Gain RL = 4Ω 280kΩ/RI 300kΩ/RI 320kΩ/RI V/VRL = 8Ω 300kΩ/RI 320kΩ/RI 340kΩ/RI RDS Static Drain-Source On-State Resistance VDD = 5.5V 300 mΩVDD = 3.6V 350 VDD = 2.1V 500 RS Resistance from Shutdown to GND 300 K Ω TON Turn On Time V DD = 2.1V to 5.5V 8 msTOFF Turn Off Time V DD = 2.1V to 5.5V 8 Operating Characteristics TA = 25°C, Gain = 2V/V, RI = 150kΩ unless otherwise noted. Symbol Characteristic Conditions Min Typ Max Units POUT Output Power THD+N = 10%, f = 1kHz, RL = 4Ω VDD = 5.0V 2.80 W VDD = 3.6V 1.41 VDD = 2.5V 0.62 THD+N = 1%, f = 1kHz, RL = 4Ω VDD = 5.0V 2.35 VDD = 3.6V 1.14 VDD = 2.5V 0.46 THD+N = 10%, f = 1kHz, RL = 8Ω VDD = 5.0V 1.66 VDD = 3.6V 0.84 VDD = 2.5V 0.37 THD+N = 1%, f = 1kHz, RL = 8Ω VDD = 5.0V 1.35 VDD = 3.6V 0.68 VDD = 2.5V 0.29  Effi ciency RL = 8Ω, f = 1kHz VDD = 5.0V, POUT = 1.2W 92 VDD = 3.6V, POUT = 0.6W 91 RL = 4Ω,f = 1kHz VDD = 5.0V, POUT = 2.0W 87 VDD = 3.6V, POUT = 1.0W 85 THD+N Total Harmonic Distortion + Noise RL = 8Ω, f = 1kHz V DD = 5.0V, POUT = 1.0W 0.12 RL = 8Ω, f = 1kHz V DD = 3.6V, POUT = 0.5W 0.21 RL = 8Ω, f = 1kHz V DD = 2.5V, POUT = 0.2W 0.26 SNR Signal-to Noise Ratio V DD = 5.0V, POUT = 1.0W, RL = 8Ω 91 dBCMRR Common Mode Rejection Ratio VDD = 3.6V, VIC = 1Vpp f = 217Hz -63 PSRR Power Supply Ripple Rejection VDD = 3.6V, Inputs AC-ground with CI = 2.2μF VRIPPLE = 200mVpp, f = 217Hz -60 ZI Input Impedance R L = 4Ω 142 150 158 k Ω

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 AAT5101 DATA SHEET 2.5W Mono Filter-Free Class D Audio Power Amplifier Typical Characteristics 1, 2 Measurement Input 30kHz Low Pass FilterAAT5101 Measurement Output Power Supply IN+ IN- VO+ VO- VDD GND CI CI RI RI Load 4. 7μF Test Set-up for Typical Characteristics Graphs. 1. A 33 μH inductor was placed in series with load resistor to emulate a small speaker for efficiency measurement. 2. The 30kHz low-pass filter is required even if the analyzer has an internal low-pass filter. An RC low pass filter (100 Ω, 47nF) is used on each output for the data sheet graphs.

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 AAT5101 DATA SHEET 2.5W Mono Filter-Free Class D Audio Power Amplifier Typical Characteristics Efficiency vs. Output Power (f = 1kHz; RL = 8ΩΩ + 33μH) Output Power (W) Efficiency (%) 100 VDD = 5.0V VDD = 3.6V VDD = 2.5V VDD = 2.1V Efficiency vs. Output Power (f = 1kHz; RL = 4Ω + 33μH) Output Power (W) Efficiency (%) VDD = 5.0V VDD = 3.6V VDD = 2.5V VDD = 2.1V Supply Current vs. Output Power (f = 1kHz; RL = 8ΩΩ + 33μH) Output Power (W) Supply Current (mA) 100 150 200 250 300 350 VDD = 5.0V VDD = 3.6V VDD = 2.5V VDD = 2.1V Supply Current vs. Output Power (f = 1kHz; RL = 4ΩΩ + 33μH) Output Power (W) Supply Current (mA) 100 200 300 400 500 600 VDD = 5.0V VDD = 3.6V VDD = 2.5V VDD = 2.1V Quiescent Current vs. Supply Voltage Supply Voltage (V) Quiescent Current (mA) 0.5 1.5 2.5 85°C 25°C -40°C

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 AAT5101 DATA SHEET 2.5W Mono Filter-Free Class D Audio Power Amplifier Typical Characteristics THD+N vs. Output Power (f = 1kHz; RL = 8Ω) Output Power (W) THD+N (%) 0.1 10.01 10 0.1 VDD = 5.0V VDD = 3.6V VDD = 2.5V VDD = 2.1V THD+N vs. Output Power (f = 1kHz; RL = 4Ω) Output Power (W) THD+N (%) 0.1 10.01 10 0.1 VDD = 5.0V VDD = 3.6V VDD = 2.5V VDD = 2.1V THD+N vs. Frequency (CI = 2.2μF; RL = 8Ω) Frequency (Hz) THD+N (%) 10 100 1000 10000 100000 0.01 0.1 VDD = 5V, POUT = 1W VDD = 3.6V, POUT = 500mW VDD = 2.5V, POUT = 200mW VDD = 2.1V, POUT = 150mW THD+N vs. Frequency (CI = 2.2μF; RL = 4Ω) Frequency (Hz) THD+N (%) 10 100 1000 10000 100000 0.01 0.1 VDD = 5.0V, POUT = 1.5W VDD = 3.6V, POUT = 800mW VDD = 2.5V, POUT = 300mW VDD = 2.1V, POUT = 200mW Output Power vs. Supply Voltage (f = 1kHz; RL = 8Ω) Supply Voltage (V) Output Power (W) 0.0 0.3 0.6 0.9 1.2 1.5 1.8 THD+N = 1% THD+N = 10% Output Power vs. Supply Voltage (f = 1kHz; RL = 4Ω) Supply Voltage (V) Output Power (W) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 THD+N = 1% THD+N = 10%

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 AAT5101 DATA SHEET 2.5W Mono Filter-Free Class D Audio Power Amplifier Typical Characteristics PSRR vs. Frequency (VRIPPLE = 200mVpp; CI = 2.2μF; RL = 8Ω; Inputs AC-grounded) Frequency (Hz) PSRR (dB) 10 1000 100000 100 10000 -70 -65 -60 -55 -50 -45 -40 VDD = 5.0V VDD = 3.6V VDD = 2.5V VDD = 2.1V PSRR vs. Frequency (VRIPPLE = 200mVpp; CI = 2.2μF; RL = 4Ω; Inputs AC-grounded) Frequency (Hz) PSRR (dB) 10 1000 100000 100 10000 -70 -65 -60 -55 -50 -45 -40 VDD = 5.0V VDD = 3.6V VDD = 2.5V VDD = 2.1V CMRR vs. Frequency (VDD = 3.6V; VIC = 200mVpp; RL = 8Ω) Frequency (Hz) CMRR (dB) 10 1000 100000 100 10000 -70 -65 -60 -55 -50 -45 -40 Shutdown Voltage (High) vs. Supply Voltage Supply Voltage (V) Shutdown Voltage (High) (V) 0.2 0.4 0.6 0.8 1.2 1.4 1.6 85°C 25°C -40°C Shutdown Voltage (Low) vs. Supply Voltage Supply Voltage (V) Shutdown Voltage (Low) (V) 0.2 0.4 0.6 0.8 1.2 1.4 1.6 85°C 25°C -40°C

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 AAT5101 DATA SHEET 2.5W Mono Filter-Free Class D Audio Power Amplifier

Application Information

Input Resistor (RI) Selection The input resistors (R I) set the gain of the amplifier according to the following equation: Gain = 300KΩ (RL = 4Ω) Gain = 320KΩ (RL = 8Ω) For input resistors (R I), resistor matching is a very important criteria. The balance of the output around the reference voltage depends on a matched ratio of the resistors. CMRR and PSRR diminish if resistor mismatch occurs. Therefore, it is recommended to use 1% toler- ance resistors or better to keep the performance opti- mized. Decoupling Capacitor (CS) Selection The AAT5101 is a high-performance class-D audio ampli- fier that requires adequate power supply decoupling to ensure high efficiency and low total harmonic distortion (THD). For decoupling capacitor (C S), a good low equiva- lent series resistance (ESR) 4.7 μF ceramic capacitor is preferred. Input Capacitor (CI) Selection The input capacitors and input resistors form a high-pass filter with the corner frequency, F C, determined by the following equation. The value of the input capacitor is an important consideration as it directly affects the bass (low frequency) performance of the circuit. Speakers in wireless phones cannot usually respond well to low fre- quencies, so a high pass filter will be useful in this appli- cation. FC = 1 2 · π · RI · CI Optional Output Filter The AAT5101 can be designed without an output filter if the traces from the amplifier to the speaker are short. However, to lower radiated emissions as much as possi- ble when used in filter-free mode, a ferrite bead filter can be used. If choosing a ferrite bead, choose one with high impedance at high frequencies, but very low imped- ance at low frequencies. The MPZ1608S221A1 from TDK is a good choice. VO + VO - Ferrite Bead Ferrite Bead Figure 1: Optional EMI Ferrite Bead Filter.

Figure 9. All components are placed as close as possible to the AAT5101's leads to achieve better performance.

  1. The decoupling capacitor (C4) should connect to the

VDD pin and PVDD pin as closely as possible.

  1. The input resistor (R1, R2) should be placed very
  2. The input routes should be similar and the distance

between the two routes should be small.

  1. The output traces should be short, wide, and not

pass beneath the IC in the other layers. Figure 8: AAT5101 Evaluation Board Schematic.

1 SMD Resistor 150K Ω R1, R2 0603 Vishay-Draloric CRCW0603

4 Not populated C3

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 AAT5101 DATA SHEET 2.5W Mono Filter-Free Class D Audio Power Amplifier (a) Top Layer (b) Ground Plane (c) Power Plane (d) Bottom Layer Figure 9: AAT5101 Evaluation Board PCB Layout.

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 AAT5101 DATA SHEET 2.5W Mono Filter-Free Class D Audio Power Amplifier Copyright © 2012 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility fo r errors or omissions in these materials or the information contained herein. Sky- works may change its documentation, products, services, specifi cations or product descriptions at any time, without notice. Skyworks makes no commitment to update the materials or information and shall have no responsibility whatsoever for confl icts, incompatibilities, or other diffi culties arising from any future changes. No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or information provided here- under, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions of Sale. THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING FITNESS FOR A PARTICULAR PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY DISCLAIMED. SKYWORKS DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS SHALL NOT BE LIABLE FOR ANY DAMAGES, IN- CLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury, death, physical or en- vironmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any damages resulting from such improper use or sale. Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifi cations as a result of design defects, errors, or operation of products outside of pub- lished parameters or design specifi cations. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifi cations or parameters. Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identifi cation purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by reference.

Ordering Information

Package Part Marking 1 Part Number (Tape and Reel)2 WLCSP-9 7HYW AAT5101IUR-T1 Skyworks Green™ products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Definition of Green™ , document number SQ04-0074. Packaging Information WLCSP-9 1.420 ± 0.025 1.420 ± 0.025 1.420 ± 0.025 0.415 ± 0.040 0.235 ± 0.020 Bottom ViewTop View Side View 1.000 1.000

0.500 BSC

0.650 ± 0.060 0.320 ± 0.020 All dimensions in millimeters. 1. YW = date code. 2. Sample stock is generally held on part numbers listed in BOLD.