The MAX608 low-voltage step-up controller operates from a 1.8V to 16.5V input voltage range. Pulse-frequency modulation (PFM) control provides high efficiency at heavy loads, while using only 85A (typical) when operating with no load. In addition, a logic-controlled shutdown mode reduces supply current to 2A typical. The output voltage is factory-set at 5V or can be adjusted from 3V to 16.5V with an external resistor divider.
The MAX608 is ideal for two- and three-cell batterypowered systems. An operating frequency of up to 300kHz allows use with small surface-mount components.
The MAX608 operates in "bootstrapped" mode only (with the chip supply, OUT, connected to the DC-DC output). For a 12V output without external resistors, or for nonbootstrapped applications (chip supply connected to input voltage), refer to the pin-compatible MAX1771. The MAX608 is available in 8-pin DIP and SO packages.
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High-Efficiency DC-DC ConvertersBattery-Powered ApplicationsPositive LCD-Bias GeneratorsPortable Communicators
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1.8V to 16.5V Input Range85% Efficiency for 30mA to 1.5A Load CurrentsUp to 10W Output Power110A Max Supply Current5A Max Shutdown CurrentPreset 5V or Adjustable Output (3V to 16.5V)Current-Limited PFM Control SchemeUp to 300kHz Switching FrequencyEvaluation Kit Available
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Supply Voltage
OUT to GND.................................................................-0.3V, 17V
EXT, CS, REF, SHDN, FB to GND ..................-0.3V, (VOUT + 0.3V)
GND to AGND..............................................................0.1V, -0.1V
Continuous Power Dissipation (TA = +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C) ............727mW
SO (derate 5.88mW/°C above +70°C).........................471mW
Operating Temperature Range ........................-40°C to +85°C
Junction Temperature.....................................................+150°C
Storage Temperature Range ..........................-65°C to +160°C
Lead Temperature (soldering, 10sec) ............................+300°C
Post a Buying Lead
Required Field 
