The MAX1557ETB+T is a 16μA quiescent current, 1.2A PWM step-down DC to DC converter in 10 pin TDFN package. It is a high efficiency, low-quiescent operating current, low dropout and minimal (27μA) quiescent current in dropout make this converter ideal for powering portable devices from 1-cell Li-ion or 3-cell alkaline/NiMH batteries. The MAX1557 delivers up to 600mA and has pin selectable 1V, 1.3V and 1.5V outputs and is also adjustable. The MAX1557 contain a low on-resistance internal MOSFET switch and synchronous rectifier to maximize efficiency and dropout performance while minimizing external component count. A 1MHz PWM switching frequency keeps components small. Both devices also feature an adjustable soft-start to minimize battery transient loading.
Supply voltage range is 2.6V to 5.5V
Operating temperature range from -40°C to 85°C
Voltage positioning optimizes load transient response
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