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MAX8718 Dataheets PDF



Part Number MAX8718
Manufacturers Maxim Integrated Products
Logo Maxim Integrated Products
Description (MAX8718 / MAX8719) High-Voltage / Low-Power Linear Regulators for Notebook Computers
Datasheet MAX8718 DatasheetMAX8718 Datasheet (PDF)

19-3495; Rev 0; 11/04 High-Voltage, Low-Power Linear Regulators for Notebook Computers General Description The MAX8718/MAX8719 are micropower, 8-pin TDFN linear regulators that supply always-on, keep-alive power to CMOS RAM, real-time clocks (RTC), and microcontrollers in systems with high-voltage batteries. The circuits consist of a 100mA linear regulator and a power-good comparator (PGOOD) with fixed-output delay. Key features include wide input voltage range, low-dropout voltage, and low-qui.

  MAX8718   MAX8718



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19-3495; Rev 0; 11/04 High-Voltage, Low-Power Linear Regulators for Notebook Computers General Description The MAX8718/MAX8719 are micropower, 8-pin TDFN linear regulators that supply always-on, keep-alive power to CMOS RAM, real-time clocks (RTC), and microcontrollers in systems with high-voltage batteries. The circuits consist of a 100mA linear regulator and a power-good comparator (PGOOD) with fixed-output delay. Key features include wide input voltage range, low-dropout voltage, and low-quiescent supply current. Despite a miserly 25µA (max) no-load quiescent current, the MAX8718/MAX8719 have good line- and loadtransient response and excellent AC power-supply rejection. They provide a clean fixed 5V or 3.3V output (MAX8718), or an adjustable 1.24V to 28V output (MAX8719), even when subjected to fast supply-voltage changes that occur during the switchover from battery to AC-adapter input power. The space-saving TDFN package has excellent thermal characteristics and tolerates up to 1951mW of power dissipation. Internal foldback current limiting and thermal shutdown protect the regulator from overload and thermal faults. In addition to the main notebook-computer application, these devices are useful in other low-power, high-voltage applications (4V < VIN < 28V) such as smart batteries, current control loops, telecom emergency power, and housekeeping power for off-line supplies. The MAX8718/MAX8719 are available in a thermally enhanced 3mm x 3mm, 8-lead TDFN package. ♦ 4V to 28V Input Range ♦ 18µA Quiescent Supply Current ♦ <3µA Shutdown Supply Current ♦ 100mA Output Current ♦ 3.3V or 5V, Pin-Selectable Output (MAX8718) ♦ Adjustable 1.24V to 28V Output (MAX8719) ♦ ±2% Output Accuracy ♦ Thermal-Overload Protection ♦ Delayed Power-Good Output ♦ Thermally Enhanced 8-Pin TDFN Package Features MAX8718/MAX8719 Ordering Information PART TEMP RANGE PIN-PACKAGE 8 TDFN 3mm x 3mm 8 TDFN 3mm x 3mm OUTPUT VOLTAGE 3.3V/5V Adjustable MAX8718ETA -40°C to +85°C MAX8719ETA -40°C to +85°C Applications CMOS/RTC Backup Power Microcontroller Power Notebook Computers Smart-Battery Packs PDAs and Handy-Terminals Battery-Powered Systems IN 1 GND 2 5/3 (FB) 3 VCC 4 Pin Configuration TOP VIEW 8 OUT MAX8718 MAX8719 7 I.C. 6 SHDN 5 PGOOD TDFN 3mm × 3mm () ARE FOR THE MAX8719. ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. High-Voltage, Low-Power Linear Regulators for Notebook Computers MAX8718/MAX8719 ABSOLUTE MAXIMUM RATINGS IN to GND ...............................................................-0.3V to +30V SHDN to GND ..............................................-0.3V to (VIN + 0.3V) 5/3 (MAX8718) to GND.............................................-0.3V to +6V FB (MAX8719) to GND .............................................-0.3V to +6V OUT (MAX8718) to GND .......


TLP555 MAX8718 MAX8719


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