MAX1678是Maxim美信半导体公司的一款DC-DC开关调节器产品，MAX1678是1节至2节电池、低噪声、高效率、升压型DC-DC转换器，本站介绍了MAX1678的封装应用图解、特点和优点、功能等，并给出了与MAX1678相关的Maxim元器件型号供参考。
MAX1678 - 1节至2节电池、低噪声、高效率、升压型DC-DC转换器 - DC-DC开关调节器 - 高效1节电池升压转换器，用于寻呼设备 - 美信半导体
The MAX1678 is a high-efficiency, low-voltage, synchronous-rectified, step-up DC-DC converter intended for use in devices powered by 1 to 3-cell alkaline, NiMH, or NiCd batteries or a 1-cell lithium battery. It guarantees a 0.87V start-up voltage and features a low 37µA quiescent supply current.
The device includes a 1Ω, N-channel MOSFET power switch, a synchronous rectifier that acts as the catch diode, a reference, pulse-frequency-modulation (PFM) control circuitry, and circuitry to reduce inductor ringing-all in an ultra-small, 1.1mm-high µMAX® package.
The output voltage is preset to 3.3V or can be adjusted from +2V to +5.5V using only two resistors. Efficiencies up to 90% are achieved for loads up to 50mA. The device also features an independent undervoltage comparator (PFI/PFO) and a logic-controlled 2µA shutdown mode.
