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AIC2141

600mA Ultra Low IQ Step-down DC/DC Converer With AOT Control

FEATURES
  • Typ. 700nA Quiescent Current
  • Adaptive On Time Control
  • 2.5V to 5.5V Input Range
  • Up to 91% Efficiency
  • 16 Selectable Output Voltages in 100mV Steps between 1.8V to 3.3V
  • Up to 600mA Output Current
  • Automatic Transition to No Ripple 100% Mode
  • Low Output Ripple Voltage
  • Slew Rate Controlled Load Switch
  • Discharge Function on VOUT / LOAD
  • Power Good Output
  • Optimized for Operation with a Tiny 2.2μH In-ductor and 10μF COUT
  • Small 2.4 x 2.4 mm2 DFN-12 Package
APPLICATIONS
  • Wearable Device
  • Bluetooth Low Energy
  • Sensor HUB
  • RF Module
DESCRIPTION
The AIC2141 is ultra low IQ step-down dc/dc converter featuring typical 700nA quiescent current and operating with a tiny 2.2μH induc-tor and 10μF output capacitor. AIC2141 based device extends the light load efficiency range below 10μA load currents. AIC2141 supports output currents up to 600mA. The input voltage range from 2.5V to 5.5V allows also operation from a USB port and thin-film solar modules. The output voltage is user selectable by four VSEL pins within a range from 1.8V to 3.3V in 100mV steps. AIC2141 features low output ripple voltage and low noise with a small out-put capacitor. Once the battery voltage comes close to the output voltage (close to 100% duty cycle) the device enters no ripple 100% mode operation to prevent an increase of output rip-ple voltage. The device then stops switching and the output is connected to the input volt-age. The integrated slew rate controlled load switch provides typical 0.6Ω on-resistance and can distribute the selected output voltage to a temporarily used sub-system. The AIC2141 is available in a small 12 pin 2.4 × 2.4mm2 DFN-12 package.
TYPICAL APPLICATION


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