TI TPS62745DSSR

The TPS62745 is a high - efficiency, ultra - low - power synchronous step - down converter optimized for low - power wireless applications. It provides a regulated output with a quiescent current of only 400 nA. The device is powered by two rechargeable lithium - ion batteries or four to six alkaline batteries. The input voltage range of the device is up to 10 V, so it can also be powered by a USB port and a thin - film solar module. The output voltage is set through four VSEL pins. The voltage range of the TPS62745 is from 1.8 V to 3.3 V; the voltage range of the TPS627451 is from 1.3 V to 2.8 V. The TPS62745 uses a small output capacitor and features low output ripple voltage and low noise. An internal input voltage switch controlled by the EN_VIN_SW pin connects the supply voltage to the VIN_SW pin. This switch is dedicated to an external voltage divider to proportionally reduce the input voltage of an external ADC. When the supply voltage is below the undervoltage lockout threshold, this switch automatically opens. The TPS62745 comes in a small 12 - pin 3 mm×2 mm WSON package.

• VIN range: 3.3V to 10V
• 400nA quiescent current (typical)
• Up to 90% efficiency at load current >15μA
• Output current up to 300mA
• RF-friendly DCS-Control™
• Low output ripple voltage
• 16 selectable output voltages: 1.8V to 3.3V (TPS62745), 1.3V to 2.8V (TPS627451)
• Integrated input voltage switch
• Integrated VOUT discharge function
• Open-drain power-good output
• Compatible with miniature 3.3μH or 4.7μH inductors
• Small 3mm x 2mm WSON package

• Bluetooth Low Energy
• Radio Frequency for Consumer Electronics (RF4CE)
• Short-Range Low-Power Communication (Zigbee)
• Industrial Instrumentation & Metering
• Energy Harvesting