Research

  • My current research is mainly focused on power management integrated circuits for various applications such as smartphones, servers, lighting, energy harvesting for IoT etc. Following are few research topics I am currently working on.

High Performance Switching DC-DC Converters

alt= 
  • Inductive and capacitive DC-DC converters

  • Analog and digital controllers for Buck, Boost and Buck-Boost converters

  • Fixed Frequency Hysteretic, constant ON-Time and ripple converters

  • Time based controllers for switching DC-DC converters

  • Fast transient switching converters

  • Fast tracking converters for DVFS applications

  • Low noise switching converters for RF applications

  • DC-DC converters with auto tuning

  • Techniques for efficiency improvement

Low Drop-Out (LDO) Regulators

alt= 

  • Fast transient LDO

  • High PSSR LDO

  • Area efficient LDO

  • Digitally controlled LDO

Energy Harvesting for IoT

alt= 
  • Ultra low power controllers

  • Maximum power point tracking (MPPT)

  • Ultra low power and low voltage AC-DC converter for piezo and RF energy harvesters

  • Energy harvesting for wearable and biomedical devices

  • Highly efficient charger circuit

  • Charge-pump circuits

  • Ultra low power LDOs

Power Converters and Drivers for Display and Lighting

alt= 
  • Bi-polar converters for LCD and AMOLED displays

  • LED drivers for camera flash, display backlight and LED lights

  • LED drivers with ambient light sensing

  • LED drivers for pulse oximeters

Battery Chargers and Fuel Gauge

alt= 
  • Li-ion battery modelling

  • Battery charge estimation techniques

  • Fast charging

  • Battery impedance estimation and correction

Motor and Haptics Driver

alt= 
  • Sensorless DC/BLDC motor drivers

  • Stepper motor drivers

  • Linear resonant motor drivers

  • Back EMF sensing techniques