PWM Step-Up DC-DC Converters
MAX5025–MAX5028
19-2239; Rev 2; 3/09 EVAALVUAAILTAIOBNLEKIT
500kHz, 36V Output, SOT23, PWM Step-Up DC-DC Converters
G...
Description
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 package.
Applications
TV Tuner Power Supply
Low-Noise Varactor Diode Biasing
Set-Top Box Tuner Power Supply
PCI Cable Modem
Voice-Over-Cable
LCD Power Supply
Avalanche Photodiode Biasing
Features
♦ Input Voltage Range: 3V to 11V (MAX5026/MAX5028) 4.5V to 11V (MAX5025/MAX5027)
♦ Wide Output Voltage Range: VCC to 36V ♦ Output Power: 120mW (max)
♦ User-Adjustable Output Voltage with MAX5025/MAX5026 Using External Feedback Resistors
♦ Fixed 30V Output Voltage: MAX5027/MAX5028
♦ Internal 1.3Ω (typ), 40V Switc...
Similar Datasheet