MP2321

Active

19V, 2A, 40? IQ, High-Efficiency, Constant-On-Time, Step-Down Converter in a QFN (2mmx3mm) Package



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Product Description

The MP2321 is a fully-integrated, high-efficiency, synchronous, step-down, switch-mode converter with 40μA of quiescent current. The MP2321 achieves 2A of continuous output current over a wide input supply range with excellent load and line regulation and can operate with high efficiency over a wide output current load range. The MP2321 is optimized for battery-operated applications and applications requiring high light-load efficiency. 
With constant-on-time (COT) control, the MP2321 provides very fast transient response, easy loop design, and very tight output regulation.
Full protection features include short-circuit protection (SCP), over-current protection (OCP), under-voltage protection (UVP), and thermal shutdown.
The MP2321 requires a minimal number of readily available, standard, external components and is available in a space-saving QFN-14 (2mmx3mm) package.

Programmable

Product Features

  • 4V to 19V Operating Input Range
  • 2A Output Current
  • 40μA Quiescent Current
  • Output Adjustable from 0.6V
  • 110mΩ/40mΩ High-Side/Low-Side RDS(ON) for Internal Power MOSFETs
  • Power Good Indicator
  • Programmable Soft-Start Time
  • Forced PWM or Auto PFM/PWM Mode Selectable
  • Programmable Switching Frequency
  • Thermal Shutdown
  • Short-Circuit Protection: Hiccup Mode
  • Available in a QFN-14 (2mmx3mm) Package

Parametrics

  • fsw (max) (kHz)0
  • Vin (min) (V)4
  • Vin (max) (V)19
  • Iout (max) (A)2
  • Isw Limit (typ) (A)4
  • Max Duty Cycle (%)1
  • Vfb (typ) (V)0.6
  • Iq (typ) (mA)0.04
  • Regulated Outputs1
  • Vout (min) (V)0.6
  • GradeCatalog
  • PackageQFN-14 (2x3)
  • Control ModeCOT
  • Common FeaturesExternal Soft Start, Light-Load Efficiency, Power Good, Synchronous Rectification
  • Special FeaturesProgrammable Frequency