MAX98307 3.3W Mono Class DG Multilevel Audio Amplifier
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MAX98307/MAX98308 3.3W Mono Class DG Multilevel Audio Amplifier General Description The MAX98307/MAX98308 fully differential mono Class DG multilevel power amplifiers with integrated inverting charge pumps offer highly efficient, high-power audio solutions for portable applications. S High Efficiency Combined with High Output Power Class DG Multilevel Modulation Ensures Maximum Efficiency Over Wide Output Power Range Class DG multilevel modulation extends the dynamic range of the output signal by employing a charge-pumpgenerated negative rail as needed to extend the supply range. This scheme results in high efficiency over a wide output power range. S Improves Battery Life Low 1.85mA Quiescent Current The ICs combine Maxim’s active emissions limiting edge rate and overshoot control circuitry with multilevel output modulation to greatly reduce EMI. These features eliminate the need for output filtering as compared to traditional Class D devices, reducing component count and cost. S High Output Power at 10% THD+N 1.77W at VPVDD = 3.6V, 8I + 68µH Load 3.3W at VPVDD = 5V, 8I + 68µH Load The MAX98307’s 16-pin TQFN package features an adjustable gain set by external resistors. The MAX98308’s space-saving 12-bump WLP package features an internally fixed gain of 8.5dB, 11.5dB, 14.5dB, 17.5dB, and 20.5dB set by a single gain input. Both devices operate over the extended -40NC to +85NC temperature range. S High Output Power at 1% THD+N 1.54W at VPVDD = 3.6V, 8I + 68µH Load 2.85W at VPVDD = 5V, 8I + 68µH Load S 84% Efficiency (VPVDD = 3.6V, at 500mW Output) S Active Emissions Limiting and Class DG Multilevel Output Modulation Eliminates EMI Output Filtering Requirement S Integrated Charge Pump and High Efficiency Results in Small Solution Size S Excellent RF Immunity S Click-and-Pop Suppression S Thermal and Overcurrent Protection S Low-Current Shutdown Mode Cellular Phones VoIP Phones Portable Audio Notebook Computers Ordering Information appears at end of data sheet. Simplified Block Diagrams SHDN SVSS SHDN CHARGE PUMP For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

MAX98307/MAX98308 3.3W Mono Class DG Multilevel Audio Amplifier MAX98307 Typical Application Circuit 2.6V TO 5.25 CHARGE PUMP GND *SYSTEM BULK CAPACITOR MAX98308 Typical Application Circuit 2.6V TO 5.25 *SYSTEM BULK CAPACITOR Maxim Integrated

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer...

MAX98307/MAX98308 3.3W Mono Class DG Multilevel Audio Amplifier ELECTRICAL CHARACTERISTICS (continued) VPVDD = VCC = VSHDN = 3.6V, VPGND = VGND = 0V, ZL = 8I + 68FH between OUT+ and OUT-, (MAX98307 RIN+ = RIN- = 10kI, RFB+ = RFB- = 20kI), CIN+ = CIN- = 0.33FF, AV = 14.5dB, AC measurement bandwidth 20Hz to 20kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25NC.) (Notes 2, 3) PARAMETER GAIN = short to PVDD GAIN = 100kI pullup to PVDD GAIN = unconnected Common-Mode Rejection Ratio (MAX98308) GAIN = short to GND Voltage Gain (MAX98308) Maxim Integrated

MAX98307/MAX98308 3.3W Mono Class DG Multilevel Audio Amplifier ELECTRICAL CHARACTERISTICS (continued) VPVDD = VCC = VSHDN = 3.6V, VPGND = VGND = 0V, ZL = 8I + 68FH between OUT+ and OUT-, (MAX98307 RIN+ = RIN- = 10kI, RFB+ = RFB- = 20kI), CIN+ = CIN- = 0.33FF, AV = 14.5dB, AC measurement bandwidth 20Hz to 20kHz, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25NC.) (Notes 2, 3) PARAMETER Total Harmonic Distortion Plus Noise Output Offset Voltage Click-and-Pop Level SYMBOL THD+N ±1 Into shutdown Out of shutdown Output Noise fIN = 1kHz, POUT at 500mW, THD+N = 0.02% fIN...

MAX98307/MAX98308 3.3W Mono Class DG Multilevel Audio Amplifier Typical Operating Characteristics (VPVDD = VCC = VSHDN = 3.6V, VPGND = VGND = 0V, ZL = 8ω + 68FH between OUT+ and OUT-, AV = 14.5dB (MAX98307 RIN+ = RIN- = 10kω, RFB+ = RFB- = 20kω), CIN+ = CIN- = 0.33µF, AC measurement bandwidth 20Hz to 20kHz.) TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER (MAX98307) TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER (MAX98307) TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER (MAX98307) TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT POWER (MAX98308) TOTAL HARMONIC DISTORTION...

MAX98307/MAX98308 3.3W Mono Class DG Multilevel Audio Amplifier Typical Operating Characteristics (continued) (VPVDD = VCC = VSHDN = 3.6V, VPGND = VGND = 0V, ZL = 8ω + 68FH between OUT+ and OUT-, AV = 14.5dB (MAX98307 RIN+ = RIN- = 10kω, RFB+ = RFB- = 20kω), CIN+ = CIN- = 0.33µF, AC measurement bandwidth 20Hz to 20kHz.) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (MAX98307) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (MAX98307) MAX98307 toc08 TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (MAX98307) TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (MAX98308) TOTAL...

MAX98307/MAX98308 3.3W Mono Class DG Multilevel Audio Amplifier Typical Operating Characteristics (continued) (VPVDD = VCC = VSHDN = 3.6V, VPGND = VGND = 0V, ZL = 8ω + 68FH between OUT+ and OUT-, AV = 14.5dB (MAX98307 RIN+ = RIN- = 10kω, RFB+ = RFB- = 20kω), CIN+ = CIN- = 0.33µF, AC measurement bandwidth 20Hz to 20kHz.) OUTPUT POWER vs. LOAD RESISTANCE (MAX98307) MAX98307 toc14 OUTPUT POWER vs. LOAD RESISTANCE (MAX98307) OUTPUT POWER vs. LOAD RESISTANCE (MAX98307) OUTPUT POWER vs. LOAD RESISTANCE (MAX98308) OUTPUT POWER vs. LOAD RESISTANCE (MAX98308) OUTPUT POWER vs. LOAD RESISTANCE...