AIC2140
300mA Ultra Low Iq Step-Down DC/DC Converter with AOT Control
- FEATURES
-
- Typ. 600nA Quiescent Current
- Adaptive On Time Control
- 2.2V to 5.5V Input Range
- Up to 92% Efficiency
- 16 Selectable Output Voltages in 100mV Steps between 1.8V to 3.3V
- Up to 300mA 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 2.2uH In-ductor and 10uF COUT
- Small DFN-12 (2.4x2.4) Package
- APPLICATIONS
-
- Wearable Device
- Bluetooth Low Energy
- Sensor HUB
- RF Module
- DESCRIPTION
- The AIC2140 is ultra low IQ step-down dc/dc converter featuring typical 600nA quiescent current and operating with a tiny 2.2uH inductor and 10uF output capacitor. AIC2140 based device extends the light load efficiency range below 10μA load currents. AIC2140 supports output currents up to 300mA. The input voltage range from 2.2V 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. AIC2140 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 ripple voltage. The device then stops switching and the output is connected to the input voltage. 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 AIC2140 is available in a small 12 pin 2.4 × 2.4mm2 DFN-12 package.
- TYPICAL APPLICATION
