MAX9738 19-3700 Rev 0 3/08 16V Class G Amplifier with P-P Inverting Boost Converter General Description Features The MAX9738 features a mono Class G power amplifi- Integrated Inverting Boost Converter er with an integrated inverting boost converter. The 2.7V to 5.5V Single-Supply Operation Class G amplifier is specifically designed to drive the 16V Output Voltage Swing, Ideal for Driving a P-P high capacitance of a ceramic/piezoelectric loud- Ceramic Speaker speaker. The inverting boost converter can typically supply up to 400mA of peak output current, allowing Maintains Output Voltage Swing as the Battery for a constant output of 16V over the 2.7V to 5.5V Decays P-P supply voltage range. Clickless/Popless Operation The MAX9738 maximizes battery life by offering high- Small, Thermally Efficient 5x4 WLP Package performance efficiency. Maxims proprietary output (2.5mm x 2mm) stage provides efficiency levels greater than Class AB devices without the EMI penalties commonly associat- Applications ed with Class D amplifiers. Cellular Phones Handheld Gaming The MAX9738 is ideally suited to deliver the high output Consoles Smartphones voltage swing required to drive ceramic/piezoelectric Notebook Computers MP3 Players speakers. Personal Media The device utilizes fully differential inputs and outputs, Players comprehensive click-and-pop suppression, shutdown control, and soft-start circuitry. The MAX9738 is fully Ordering Information specified over the -40C to +85C extended tempera- ture range and is available in an ultra-small, lead-free PIN- PART TEMP RANGE 5x4 WLP (2.5mm x 2mm) package. PACKAGE MAX9738EWP+TG45 -40C to +85C 5x4 WLP Typical Application Circuit/Functional Diagram and Pin Configuration appear at end of data sheet. +Denotes a lead-free package. T = Tape and reel. G45 indicates protective die coating. Simplified Block Diagram VDD V V DD BAT V SS ISET INVERTING BOOST BST CONVERTER LX FB+ OUT+ IN+ CLASS G + OUTPUT OUT- IN- STAGE - FB- GND MAX9738 PIEZOELECTRIC SPEAKER Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.16V Class G Amplifier with P-P Inverting Boost Converter ABSOLUTE MAXIMUM RATINGS (Voltages with respect to GND.) Continuous Current into/out of V , V ............................................................... -0.3V to +6V OUT+, OUT-, V , V , V .......................................400mA DD BAT BAT SS DD V to V ......................................................... -0.1V to +0.1V Any Other Pin ..................................................................20mA DD BAT V ...................................................Capacitor Connection Only, Duration of OUT+, OUT- Short Circuit to SS (V - 10V) to +0.3V V , GND, V (V > -6V).....................................Continuous BAT DD SS SS OUT+, OUT- .................................................-6V to (V + 0.3V) RMS Current per Bump DD (OUT+ to OUT-) ................................................... -8.7V to +8.7V V , LX .........................................................................800mA BAT IN+, IN-, FB+, FB-, ISET .............................-0.3V to (V + 0.3V) Continuous Power Dissipation (T = +70C) DD A LX ..................................................(V - 11.5V) to (V + 0.3V) 20-Bump UCSP (derate 10mW/C above +70C) ........800mW DD DD BST..........................................................(LX - 0.3V) to (LX + 6V) Operating Temperature Range .......................... -40C to +85C SHDN........................................................................-0.3V to +6V Junction Temperature......................................................+150C Storage Temperature Range ............................ -65C to +150C Bump Temperature (soldering) Reflow............................+235C 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. ELECTRICAL CHARACTERISTICS (V = V = SHDN = 3.6V, GND = 0V, V - V = 9V, R = 100k, R = R = 10k, R = R = 10k, C = open, R = , DD BAT DD SS ISET IN+ IN- FB+ FB- L L C1 = 10F, C2 = 10F, C3 = 0.1F, C4 = 0.1F, T = T to T , unless otherwise noted. Typical values are at T = +25C.) (Note 1) A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS GENERAL Supply Voltage Range V Inferred from PSRR test 2.7 5.5 V DD Total Quiescent Current I I + I (boost converter disabled) 7 12.5 mA DD TOT VDD VBAT Maximum Total Quiescent I Typical application circuit (Note 2) 16.5 mA DD TOT MAX Current Shutdown Supply Current I SHDN = GND 0.6 2 A SHDN Time from shutdown or power-on to full Turn-On Time t 10 ms ON operation (C = 0.1F) IN ISET Bias Voltage V 0.9 1.0 1.1 V ISET Thermal Shutdown Threshold 150 C Thermal Shutdown Hysteresis 15 C 2 MAX9738