General Description

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.

Features

♦ 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

Applications

Li+ Battery-Powered Applications
Miniature Equipment
Backup Battery Boost Converters
Translators