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说明
- Extends Battery Life
- 420nA Ultra-Low Quiescent Supply Current
- 5nA Shutdown Current
- 95% Peak Efficiency and over 85% at 10μA
- 1.8V to 5.5V Input Range
- Single Resistor-Adjustable VOUT from 0.7V to 3.3V (MAX38656A)
- Preprogrammed VOUT from 0.7V to 5V (MAX38656B) in Steps of 50mV
- 100% Duty-Cycle Mode for Low-Dropout Operation
- ±1.5% Output Voltage Accuracy
- Up to 1.5A Load Current
- Reverse-Current Blocking in Shutdown
- Active Discharge Feature
- 40°C to +125°C Operating Temperature Range
- 1.58mm x 0.89mm, 0.4mm Pitch, 6-Pin (2 x 3) WLP
- 2mm x 2mm 8-pin TDFN Package
特性
The MAX38656 is an ultra-low IQ (420nA) buck converter that steps down from an input voltage range of 1.8V to 5.5V toa wide range of output voltages between 0.7V to 3.3V using a single resistor at the RSEL pin for the MAX38656A orfactory-preprogrammed fixed output voltage versions from 0.7V to 5V for the MAX38656B. For the MAX38656B, theRSEL pin can be left floating.
The MAX38656 buck converter offers robust performance features. To optimize efficiency and transient response acrossthe load range, the buck converter automatically switches between ultra-low-power mode (ULPM), low-power mode (LPM)and high-power mode (HPM) to service the load better, depending on the load current. The buck converter overregulatesin ULPM to allow the output capacitor to handle the transient load currents. See Figure 1 for the MAX38656 modetransitions. The device supports 100% duty-cycle operation. In applications where the ambient temperature is more than+85°C, make sure that the load current is always more than 10μA at the output of buck converter.The active discharge resistor in the MAX38656A/MAX38656B pulls OUT to ground when the part is in shutdown.
Key Applications- Portable Space-Constrained Consumer Products
- Wearable Devices, Ultra-Low-Power Internet ofThings (IoT), Narrowband IoT, and Bluetooth LowEnergy
- Single Li-Ion and Coin Cell Battery Products
- Wired, Wireless Industrial Products
参数
类型 | 描述 |
智能建筑 | 自动识别和数据采集(AIDC) |
