MAX8500, MAX8503, MAX8504 PWM Buck Converters With Bypass FET For N-CDMA/W-CDMA Handsets

The MAX8500 MAX8503 MAX8504 PWM DC-to-DC buck converters are optimized with integrated bypass FET (0.25 typ) to provide power to the PA in N-CDMA and W-CDMA cell phones. The devices have a low on-resistance FET to bypass the external inductor for low dropout of only 150mV at 600mA load, regardless of inductor series resistance. The supply voltage range is from 2.6V to 5.5V and the guaranteed converter output current is 600mA. The 1MHz PWM switching frequency allows for small external components.
The MAX8500 MAX8503 are dynamically controlled to provide varying output voltages from 0.4V to VBATT. The LDO regulation point is slightly lower than the PWM converter such that the transition into and out of dropout is smooth, regardless of the inductor resistance. The MAX8504 is programmed for fixed 1.25V to 2.5V output with external resistors. It features a high-power bypass mode that connects the output directly to the battery. All devices are designed to achieve an output settling time of less than 30s for a full-scale change in output voltage and load current.
The MAX8500 MAX8503 MAX8504 are available in a 12-lead 4mm x 4mm thin QFN package (0.8mm max height).
By Maxim Integrated Products
Part Manufacturer Description Datasheet Samples
MAX8500ETC+ Maxim Integrated Products Switching Regulator, Current-mode, 2.25A, 1000kHz Switching Freq-Max, BICMOS, CQCC12, 4 X 4 MM, 0.80 MM HEIGHT, THIN, QFN-12
MAX8500ETC-T Maxim Integrated Products Switching Regulator, Current-mode, 2.25A, 1000kHz Switching Freq-Max, BICMOS, CQCC12, 4 X 4 MM, 0.80 MM HEIGHT, THIN, QFN-12
MAX8500ETC Maxim Integrated Products Switching Regulator, Current-mode, 2.25A, 1000kHz Switching Freq-Max, BICMOS, CQCC12, 4 X 4 MM, 0.80 MM HEIGHT, THIN, QFN-12
MAX8504EVKIT Maxim Integrated Products Evaluation Kit for the MAX8500, MAX8503, MAX8504
MAX8500 's PackagesMAX8500 's pdf datasheet
MAX8500ETC QFN
MAX8500ETC-T QFN




MAX8500 Pinout, Pinouts
MAX8500 pinout,Pin out
This is one package pinout of MAX8500,If you need more pinouts please download MAX8500's pdf datasheet.

MAX8500 Application circuits
MAX8500 circuits
This is one application circuit of MAX8500,If you need more circuits,please download MAX8500's pdf datasheet.


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