Part # MAX8728 datasheet

Part Manufacturer: Maxim

Maxim

Part Description: MAX8728 DS


Part Details:

19-3910; Rev 0; 1/06 EVALUATION KIT AVAILABLE Low-Cost, Multiple-Output Power Supply for LCD Monitors/TVs MAX8728 General Description Features The MAX8728 generates all the supply rails for thin-film Optimized for 10.8V to 13.2V Input Supply transistor (TFT) liquid-crystal display (LCD) panels in TVs 7V to 13.2V Input Supply Range and monitors. It includes step-down and step-up regula- Selectable Frequency (500kHz/1MHz/1.5MHz) tors, positive and negative charge pumps, and a dual- Current-Mode Step-Down Regulator mode, logic-controlled high-voltage switch control block.The MAX8728 can operate from input voltages from 7V to 14V Internal n-Channel MOSFET 13.2V and is optimized for LCD TV panel and LCD moni- 1.5% Accurate Output tor applications running directly from 12V supplies. Current-Mode Step-Up Regulator The step-up and step-down regulators feature internal 19V Internal n-Channel MOSFET power MOSFETs and high-frequency operation allow- 1% Accurate Output ing the use of small inductors and capacitors, resulting True ShutdownTM (Output Goes to Zero) in a compact solution. Both switching regulators usefixed-frequency, current-mode control architectures, 180° Out-of-Phase Switching providing fast load-transient response and easy com- Adjustable Positive/Negative Charge Pumps pensation. The positive and negative charge-pump reg- Soft-Start and Timer Delay Fault Latch for All ulators provide TFT gate-driver supply voltages. Both Outputs output voltages can be adjusted with external resistive Logic-Controlled, High-Voltage Switches voltage-dividers. Power-Up and Power-Down Sequences The MAX8728 is available in a small (5mm x 5mm), low- Thermal-Overload Protection profile (0.8mm), 32-pin TQFN package and operatesover the -40°C to +85°C temperature range. Simplified Operating Circuit Applications LCD Monitors LCD TVs V AV IN DD Ordering Information VL INL GATE


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MAX8728.pdf Datasheet