Alternatively RT9266 ZCC9266 small package / efficiency / the DCDC battery boost chip
Introduction:
ZCC9266 is a compact, high efficiency, low voltage step-up DC / DC converter having an adaptive current mode PWM control loop includes an error amplifier, a ramp generator, a comparator, and the switching drive transmission element, may be provided at stable load current range, efficient work. It waveform stable operation with no external compensation. Start low input voltage is below 1V, so ZCC9266 adapted to provide an output current of up to 300mA 1-4 cell applications. 450kHz high switching rates the size of external components is minimized. In addition, high efficiency and low quiescent current of 17mA to extend battery life. Output voltage is set by two external resistors. An external power source for driving the device (NMOS or NPN) and the interior of drive switch 2A. Small SOT-26 and SOT89-5 packaging.
Wherein
• Low 1.0V Input Voltage Start
• high power capability, alkaline batteries provide 3.3V 100mA
• 17m A static (off) the supply current
• zero current switched mode power supply
• 90% Efficiency
• 450kHz fixed switching frequency
• is the use of internal and external a power switch to provide flexibility
applications
• • handheld differential scanning calorimetry liquid crystal panel • • • MP3 RF tag
• • instruments portable wireless devices
