MAX5025–MAX5028
19-2239; Rev 2; 3/09 EVAALVUAAILTAIOBNLEKIT
500kHz, 36V Output, SOT23, PWM Step-Up DC-DC Converters
G...
MAX5025–MAX5028
19-2239; Rev 2; 3/09 EVAALVUAAILTAIOBNLEKIT
500kHz, 36V Output, SOT23, PWM Step-Up DC-DC Converters
General Description
The MAX5025–MAX5028 constant-frequency, pulsewidth modulating (PWM), low-noise boost converters are intended for low-
voltage systems that often need a locally generated high
voltage. These devices are capable of generating low-noise, high output
voltages required for varactor diode biasing in TV tuners, set-top boxes, and PCI cable modems. The MAX5025– MAX5028 operate from as low as 3V and switch at 500kHz.
The constant-frequency, current-mode PWM architecture provides for low output noise that is easy to filter. A 40V lateral DMOS device is used as the internal power switch, making the devices ideal for boost converters up to 36V. The MAX5025/MAX5026 adjustable versions require the use of external feedback resistors to set the output
voltage. The MAX5027/MAX5028 offer a fixed 30V output. These devices are available in a small, 6pin SOT23 pack...