The MAX1677EEE+ is a compact, high-efficiency, dual-output step-up and LCD bias DC to DC converter in 16 pin QSOP package. It is a compact, high-efficiency, dual-output boost converter for portable devices needing two regulated supplies typically for logic and liquid crystal displays. Operation with inputs as low as 0.7V allows the MAX1677 to accept 1, 2 or 3-cell alkaline, NiCd or NiMH batteries as well as 1-cell lithium-ion batteries. The device requires no external FETs and can maintain regulation while consuming only 20μA, making it ideal for hand-held pen-input and PDA devices operating with low-current "sleep" states. The MAX1677's primary regulator supplies up to 350mA at either a factory-preset 3.3V or an adjustable 2.5V to 5.5V output. On-chip synchronous rectification provides efficiencies up to 95%. 300KHz (or externally clocked) PWM operation is particularly suitable for applications needing low noise, such as those with wireless features.
- Supply voltage range is 0.7V to 5.5V
- Operating temperature range from -40°C to 85°C
- Up to +28V or -28V for LCD bias programmable current limit
- Quiescent current is 20μA
- Shutdown current is 1μA
- Low battery comparator
电源管理, 便携式器材
(EN)
