2A, 6V, 1.5MHz, 17μA IQ, COT Synchronous Step-Down Converter in 8-pin TSOT23

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Product Description

The MP9161A is a monolithic, step-down, switch-mode converter with built-in internal power MOSFETs. It achieves a 2A continuous output current from a 2.5V to 6V input voltage range with excellent load and line regulation. The output voltage is regulated as low as 0.6V.
The constant-on-time (COT) control scheme provides fast transient response and eases loop stabilization. Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. 
The MP9161A is available in a small TSOT23-8 package and requires a minimum number of readily available, standard, external components.
The MP9161A is ideal for a wide range of applications including high performance DSPs, FPGAs, PDAs, and portable instruments.


Product Features

  • Very Low IQ: 17μA
  • Default 1.5MHz Switching Frequency
  • 1.5% VFB Accuracy
  • EN and Power Good for Power Sequencing
  • Wide 2.5V to 6V Operating Input Range
  • Output Adjustable from 0.6V
  • Up to 2A Output Current
  • 100% Duty Cycle in Dropout
  • 110mΩ and 60mΩ Internal Power MOSFET Switches
  • Cycle-by-Cycle Over-Current Protection
  • Short-Circuit Protection with Hiccup Mode
  • Stable with Low ESR Output Ceramic Capacitors
  • Available in a TSOT23-8 Package


  • fsw (max) (kHz)1500
  • Vin (min) (V)2.5
  • Vin (max) (V)6
  • Iout (max) (A)2
  • Isw Limit (typ) (A)3.2
  • Max Duty Cycle (%)1
  • Vfb (typ) (V)0.6
  • Iq (typ) (mA)0.017
  • Regulated Outputs1
  • Vout (max) (V)6
  • Vout (min) (V)0.6
  • GradeCatalog
  • PackageTSOT23-8
  • Control ModeCOT
  • Common FeaturesLight-Load Efficiency, Power Good, Synchronous Rectification
  • Special Features100% Duty Cycle

Reference Materials