The MAX1692EUB+ is a low noise PWM DC to DC step down regulator in 10 pin µMAX package. It powers logic and transmitters in small wireless systems. The device has an internal synchronous rectifier for high efficiency. Excellent noise characteristics and fixed frequency operation provides easy post filtering. The MAX1692 is ideally suited for Li-Ion battery applications. It is also useful for 3V or 5V fixed input applications. The device operates in one of four modes. Forced PWM mode operates at a fixed frequency regardless of load. Synchronized PWM mode allows an external switching frequency to control and minimize harmonics. Idle mode (PWM/PFM) extends battery life by switching to PFM pulse skipping mode during light loads and shutdown mode places the device in standby by reducing quiescent supply current to under 0.1µA. The MAX1692 can deliver over 600mA. The output voltage can be adjusted from 1.25V to VIN with input range of 2.7V to 5.5V.
● Efficiency of 95%
● Operating temperature range from -40°C to 85°C
● Tiny switcher delivers 600mA and 10x better performance than LDO
● No schottky diode required
● 85µA quiescent current and 0.1µA shutdown supply current at TA = 0°C to 85°C
● Maximum duty cycle of 100% in dropout and minimum duty cycle of 22% at TA = 0°C to 85°C
● 750KHz fixed frequency PWM operation
● Synchronized switching frequency
● High efficiency, low dropout voltage and 1.2% accurate 1.25V reference
● Line regulation of +1% and load regulation of -1.3% at TA = 0°C to +85°C
