Piezo-sounder Driver with Multi-mode charge pump

Data Sheet


  • Operating Voltage (2.3 to 5.0V(1x/ 2x Mode), 2.3 to 3.4V(3x Mode))
  • Consumption current (
    (Active) IDS=0.3mA typ. (VIN=3V, DIN=4kHz, CPIEZO=15nF, 1x Mode)
    (Shutdown) IDS=1µA max. (VIN=3V , DIN=0V))
  • Multi-Mode Charge Pump (1x/2x/3x)
  • Input Signal Detector & Shutdown Control
  • Output Short-circuit Protection Circuit
  • C-MOS Technology
  • Package Outline (EQFN12-JE, EQFN16-G2, SSOP14)

General Description

The NJU72501 is a switching driver with multi mode charge pumpfor piezo-sounder. It can drive outputs up to 18Vpp from 3V supply.For adjusting the piezoelectric sounder sound volume, the chargepump can operate in either of a 1x, 2x or 3x mode.Because NJU72501 has the shutdown function, it is suitable forthe battery application.


  • Healthcare
  • Wrist Watches
  • Alarm Clocks
  • Handheld GPS devices
  • PDAs

Package Information

Part NumberPackage OutlinePLPPinsMaterial Declaration (RoHS/Halogen)Terminal FinishWeight(mg) (Reference)Reflow solderingFlow solderingIron solderingPacking ConditionMSLSolder Foot Print
NJU72501MJEEQFN12-JE-12Sn2Bi16Yes--Non dry pack1
NJU72501MG2EQFN16-G2-16Sn2Bi6.5Yes--Non dry pack1
NJU72501VSSOP14-14Sn2Bi65YesYesYesNon dry pack1

Sample & Buy

Part NumberPackagesStatusPacking SpecificationSampleBuy
NJU72501MJEEQFN12-JE(Active)Contact UsStock Check
NJU72501MG2EQFN16-G2(Active)Contact UsStock Check
NJU72501VSSOP14(Active)Contact UsStock Check

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