EVALUATION KIT AVAILABLE MAX17075 Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp General Description Features The MAX17075 includes a high-voltage boost regulator, 2.5V to 5.5V Input Operating Range one high-current operational amplifier, two regulated Current Mode Step-Up Regulator charge pumps, and one MLG block for gate-driver Fast-Transient Response supply modulation. Built-In 20V, 3A, 0.16 n-Channel Power MOSFET The step-up DC-DC converter is a 1.2MHz current- Cycle-by-Cycle Current Limit mode boost regulator with a built-in power MOSFET. It 87% Efficiency (5V Input to 13V Output) provides fast load-transient response to pulsed loads 1.2MHz Switching Frequency while producing efficiencies over 85%. The built-in 1% Output Voltage Regulation Accuracy 160m (typ) power MOSFET allows output voltages as High-Current 18V VCOM Buffer high as 18V boosted from inputs ranging from 2.5V to 500mA Output Short-Circuit Current 5.5V. A built-in 7-bit digital soft-start function controls 45V/s Slew Rate startup inrush currents. 20MHz -3dB Bandwidth The gate-on and gate-off charge pumps provide regu- Rail-to-Rail Output lated TFT gate-on and gate-off supplies. Both output Regulated Charge Pump for TFT Gate-On Supply voltages can be adjusted with external resistive Regulated Charge Pump for TFT Gate-Off Supply voltage-dividers. Logic-Controlled High-Voltage Switches with The operational amplifier, typically used to drive the Adjustable Delay LCD backplane (VCOM), features high-output short-cir- cuit current (500mA), fast slew-rate (45V/s), wide Soft-Start and Timed Delay Fault Latch for All bandwidth (20MHz), and rail-to-rail outputs. Outputs The MAX17075 is available in a 24-pin thin QFN pack- Overload and Thermal Protection age with 0.5mm lead spacing. The package is a square Simplified Operating Circuit (4mm x 4mm) with a maximum thickness of 0.8mm for ultra-thin LCD design. It operates over the -40C to V MAIN V IN +105C temperature range. 2.5V TO 5.5V Applications R1 10 Notebook Computer Displays VCC LX C5 FROM PGND LCD Monitor Panels 1F SYSTEM 3.3V FB LCD TVs TO V COM COMP OUT V IN V AVDD MAX17075 Ordering Information BGND RST NEG PART TEMP RANGE PIN-PACKAGE RSTIN POS DRN MAX17075ETG+ -40C to +85C 24 TQFN-EP* REF MAX17075GTG/V+ -40C to +105C 24 TQFN-EP* COM V GON *EP = Exposed pad. SRC AGND +Denotes a lead(Pb)-free/RoHS-compliant package. /V denotes an automotive qualified part. FBN DRVP V GOFF DRVN BGND FBP DEL SUP CTL EP FROM TCON Pin Configuration appears at end of data sheet. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-4353 Rev 2 12/12MAX17075 Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp ABSOLUTE MAXIMUM RATINGS VCC, CTL, RSTIN, RST to AGND ..........................-0.3V to +7.5V POS, NEG, OUT to AGND...........................-0.3V to (V + 0.3) SUP DEL, REF, COMP, FB, FBN, DRVN, DRVP RMS Current ...............................................200mA FBP to AGND .......................................-0.3V to (V + 0.3V) LX, PGND RMS Current Rating.............................................2.4A VCC PGND, BGND to AGND.........................................-0.3V to +0.3V Continuous Power Dissipation (T = +70C) A LX to PGND ............................................................-0.3V to +20V 24-Pin TQFN (derate 27.8mW/C above +70C).......2222mW SUP to PGND .........................................................-0.3V to +20V Operating Temperature Range, E Grade ............-40C to +85C DRVN, DRVP to PGND..............................-0.3V to (V + 0.3V) Operating Temperature Range, G Grade .........-40C to +105C SUP SRC, COM, DRN to AGND.....................................-0.3V to +40V Junction Temperature......................................................+150C DRN to COM............................................................-30V to +30V Storage Temperature Range .............................-65C to +160C SRC to SUP ............................................................................23V Lead Temperature (soldering, 10s) .................................+300C REF Short Circuit to AGND.........................................Continuous Soldering Temperature (reflow) .......................................+260C 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 = +5V, Circuit of Figure 1, V = V = +13V, T = 0C to +85C, unless otherwise noted. Typical values are at T = +25C.) VCC AVDD SUP A A PARAMETER CONDITIONS MIN TYP MAX UNITS V Input Supply Range 2.5 5.5 V CC V Undervoltage-Lockout (UVLO) Threshold V rising, hysteresis (typ) = 50mV 2.05 2.25 2.45 V CC CC V Shutdown Current V = 2V 100 200 A CC CC V = 1.3V, not switching 1 1.5 FB V Quiescent Current mA CC V = 1.0V, switching 4 5 FB REFERENCE REF Output Voltage No external load 1.238 1.250 1.262 V REF Load Regulation 0n < I < 50A 6 mV LOAD REF Sink Current In regulation 10 A REF Undervoltage-Lockout Threshold Rising edge, hysteresis (typ) = 200mV 1 1.17 V OSCILLATOR AND TIMING Frequency 1000 1200 1400 kHz Oscillator Maximum Duty Cycle 87 90 93 % Duration to Trigger Fault Condition FB or FBP or FBN below threshold 47 55 65 ms DEL Capacitor Charge Current During startup, V = 1.0V 4 5 6 A DEL DEL Turn-On Threshold 1.19 1.25 1.31 V DEL Discharge Switch On-Resistance 20 STEP-UP REGULATOR Output Voltage Range V 18 V VCC FB Regulation Voltage FB = COMP, C = 1nF 1.238 1.250 1.262 V COMP FB Fault Trip Level Falling edge 0.96 1 1.04 V FB Load Regulation 0 < I < full, transient only -1 % LOAD FB Line Regulation V = 2.5V to 5.5V -0.2 0 +0.2 %/V CC FB Input Bias Current V = 1.25V 50 125 200 nA FB FB Transconductance I = 2.5A at COMP, FB = COMP 75 160 280 S FB Voltage Gain FB to COMP 2600 V/V 2 Maxim Integrated