Industrial Grade, 6V, Dual 2A/2A or 3A/1A, Low Quiescent Current, Synchronous Buck with PG and SS



The MPQ2166 is an internally compensated, dual, PWM, synchronous, step-down regulator that operates from a 2.7V to 6V input and generates an output voltage as low as 0.6V. The MPQ2166 can be configured as a 2A/2A or 3A/1A output current regulator and is ideal for powering portable equipment that runs on a single-cell lithium-ion (Li+) battery due to a low 60µA quiescent current. The MPQ2166 integrates dual, 55m?, high-side switches and 20m? synchronous rectifiers for high efficiency without an external Schottky diode. The MPQ2166 has peak-current-mode control and internal compensation and is capable of low dropout configurations. Both channels can operate at 100% duty cycle. Full protection features include cycle-by-cycle current limit and thermal shutdown. The MPQ2166 requires a minimum number of readily available, standard, external components and is available in QFN-18 (2mmx3mm) and QFN-18 (2.5mmx3.5mm) packages.


  • 2.7V to 6V Operating Input Range
  • 2A/2A or 3A/1A Continuous Current
  • 55m?/20m? RDS(ON)
  • Programmed Frequency up to 3MHz
  • External Sync Clock Up to 3MHz
  • 180o Phase Shifted Operation
  • PG Indicators
  • External SS and Track
  • Adjustable Advanced Asynchronous Mode (AAM) or Forced Continuous Conduction Mode (CCM)
  • Peak Efficiency >90%
  • Output Adjustable from 0.6V to VIN
  • 100% Duty Cycle Operation
  • 60µA Quiescent Current
  • Cycle-by-Cycle Over-Current Protection (OCP)
  • Short-Circuit Protection (SCP) with Hiccup Mode and Valley Current Detection
  • Thermal Shutdown
  • Available in QFN-18 (2mmx3mm) and QFN-18 (2.5mmx3.5mm) Packages
  • Available in AEC-Q100 Grade-1


  • Vfb (V)0.6
  • Vin (min) (V)2.7
  • Vin (max) (V)6
  • Iout (max) (A)2
  • Iq (typ) (mA)0.06
  • Regulated Outputs2
  • Step-Down DC/DC Controller0
  • Step-Down DC/DC Converter2
  • Step-Up DC/DC Controller0
  • Step-Up DC/DC Converter0
  • Internal LDO0
  • GradeIndustrial
  • PackageQFN-18 (2.5x3.5), QFN-18 (2x3)
  • Control ModeCurrent Mode
  • Step-Down Converter Current (A)2.0/2.0, 3.0/1.0
  • Special Features100% Duty Cycle, 180° Phase-Shifted Operation, External Frequency Sync, Programmable Frequency, Ultra-Low Iq
  • Common FeaturesDual Output, External Soft Start, Power Good
  • SSExternal
  • PGYes