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MAX1542 Datasheet(PDF) 8 Page - Maxim Integrated Products |
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MAX1542 Datasheet(HTML) 8 Page - Maxim Integrated Products |
8 / 20 page TFT LCD DC-to-DC Converter with Operational Amplifiers 8 _______________________________________________________________________________________ Typical Operating Characteristics (continued) (VIN = 3.3V, VMAIN = 8V, fOSC = 1.2MHz, TA = +25°C, unless otherwise noted.) STEP-UP REGULATOR PULSED LOAD-TRANSIENT RESPONSE MAX1542 toc16 10 µs/div IMAIN 1A/div IL 500mA/div VMAIN 100mV/div AC-COUPLED L = 4.7 µH RCOMP = 120k Ω CCOMP = 470pF STARTUP SEQUENCE MAX1542 toc17 1ms/div VIN 2V/div VMAIN 8V/div VGOFF 5V/div VCOM 10V/div HEAVY-LOAD SOFT-START WAVEFORMS MAX1542 toc18 2ms/div RLOAD = 10 Ω VIN 5V/div VMAIN 5V/div IL 500mA/div TIMER DELAY LATCH RESPONSE TO OVERLOAD MAX1542 toc19 10ms/div IL 2A/div VMAIN 5V/div VOUT1 5V/div VCOM 20V/div OPERATIONAL AMPLIFIER RAIL-TO-RAIL I/O PERFORMANCE MAX1542 toc20 100 µs/div VPOS1 5V/div VOUT1 5V/div VSUP = 8V BUFFER CONFIGURATION OPERATIONAL AMPLIFIER LOAD-TRANSIENT RESPONSE MAX1542 toc21 1 µs/div VOUT1 1V/div AC-COUPLED 4V +50 0 -50 IOUT1 50mA/div BUFFER CONFIGURATION OPERATIONAL AMPLIFIER LARGE-SIGNAL STEP RESPONSE MAX1542 toc22 1 µs/div VPOS1 500mV/div AC-COUPLED 4V VOUT1 2V/div VSUP = 8V AV = 10 |
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