4V to 40V Input, Current Mode, Synchronous, Step-Down Controller



The MP2918 is a high-voltage, synchronous, step-down, switching controller that can directly step down voltages from up to 40V. The MP2918 uses PWM current control architecture with accurate cycle-by-cycle current limit and is capable of driving dual N-channel MOSFET switches.

Advanced Asynchronous Mode (AAM) enables non-synchronous operation to optimize light-load efficiency.

The operating frequency of the MP2918 can be programmed by an external resistor or synchronized to an external clock for noise-sensitive applications. Full protection features include precision output over-voltage protection (OVP), output over-current protection (OCP), and thermal shutdown.

The MP2918 is available in TSSOP20-EP and QFN-20 (3mmx4mm) packages. 


  • Wide 4V to 40V Operating Input Range
  • Dual N-Channel MOSFET Driver
  • 0.8V Voltage Reference with ±1.5% Accuracy Over Temperature
  • Low Dropout Operation: Maximum Duty Cycle at 99.5%
  • Programmable Frequency Range: 100kHz -1000kHz
  • External Sync Clock Range: 100kHz-1000kHz
  • 180° Out-of-Phase SYNCO
  • Programmable Soft Start
  • Power Good Output Voltage Monitor
  • Selectable Cycle-by-Cycle Current Limit
  • Output Over-Voltage Protection (OVP)
  • Hiccup Over-Current Protection (OCP)
  • Internal LDO with External Power Supply Option
  • Programmable CCM, AAM Mode
  • TSSOP20-EP and QFN-20 (3mmx4mm) Packages


  • PGYes
  • SSExternal
  • Special FeaturesFrequency Adjustable, Hiccup Current Limit
  • GradeCatalog
  • fsw (max) (kHz)1000
  • Regulated Outputs1
  • Iq (typ) (mA)0.75
  • Vfb (V)0.8
  • PackageQFN-20 (3x4), TSSOP20 EP
  • Max Duty Cycle (%)1
  • Vin (max) (V)40
  • Vin (min) (V)4