19-1563; Rev 3; 9/05
KIT ATION EVALU LE B A IL A AV
com
Low-Noise Step-Up DC-DC Converters
General Description Features
♦ 90% Efficiency ♦ Adjustable Output from VIN to 12V ♦ 1.
6A, 0.
21Ω, 14V Power MOSFET (MAX1790) ♦ 2.
4A, 0.
15Ω, 14V Power MOSFET (MAX8715) ♦ +2.
6V to +5.
5V Input Range ♦ Pin-Selectable 640kHz or 1.
2MHz Switching Frequency ♦ 0.
1µA Shutdown Current ♦ Programmable Soft-Start ♦ Small 8-Pin µMAX Package
MAX1790/MAX8715
The MAX1790/MAX8715 boost converters incorporate high-performance (at 1.
2MHz), current-mode, fixed-frequency, pulse-width modulation (PWM) circuitry with a built-in 0.
21Ω/0.
15Ω n-channel MOSFET to provide a highly efficient
regulator with fast r...