概述
The MAX1759 is a buck/boost regulating charge pump that generates a regulated output voltage from a single lithium-ion (Li+) cell, or two or three NiMH or alkaline cells for small hand-held portable equipment. The MAX1759 operates over a wide +1.6V to +5.5V input voltage range and generates a fixed 3.3V or adjustable (2.5V to 5.5V) output (Dual Mode™). Maxim's unique charge-pump architecture allows the input voltage to be higher or lower than the regulated output voltage. Despite its high 1.5MHz operating frequency, the MAX1759 maintains low 50μA quiescent supply current.
Designed to be an extremely compact buck/boost converter, this device requires only three small ceramic capacitors to build a complete DC-DC converter capable of generating a guaranteed 100mA (min) output current from a +2.5V input. For added flexibility, the MAX1759 also includes an open-drain power-OK (POK) output that signals when the output voltage is in regulation.
The MAX1759 is available in a space-saving 10-pin μMAX package that is 1.09mm high and half the size of an 8-pin SO
关键特性
Regulated Output Voltage (Fixed 3.3V or Adjustable 2.5V to 5.5V)
100mA Guaranteed Output Current
+1.6V to +5.5V Input Voltage Range
Low 50μA Quiescent Supply Current
1μA Shutdown Mode
Load Disconnected from Input in Shutdown
High 1.5MHz Operating Frequency
Uses Small Ceramic Capacitors
Short-Circuit Protection and Thermal Shutdown
Small 10-Pin μMAX Package
应用
备用电池升压转换器
Li+电池供电应用
微型设备
转换器
