Advanced Power



Topology: Buck
Input Voltage (min.): 12.00 V
Input Voltage (max.): 12.00 V
Switching Frequency (min.): 180.00 kHz
Switching Frequency (max.): 220.00 kHz
Output 1: 3.30 V / 10.000 A


The APU3037 controller IC is designed to provide a low cost synchronous Buck regulator for on-board DC to DC converter applications. With the migration of today’s ASIC products requiring low supply voltages such as 1.8V and lower, together with currents in excess of 3A, traditionallinear regulators are simply too lossy to be used when input supply is 5V or even in some cases with 3.3 input supply. The APU3037 together with dual N-channel MOSFETs such as AP60T03, provide a low cost solutionfor such applications. This device features an internal 200KHz oscillator (400KHz for "A" version), under-voltage lockout for both Vcc and Vc supplies, an external programmable soft-start function as well as output under-voltage detection that latches off the device when anoutput short is detected.


  • Synchronous Controller in 8-Pin Package
  • Operating with single 5V or 12V
  • supply voltage
  • Internal 200KHz Oscillator(400KHz for APU3037A)
  • Soft-Start Function
  • Fixed Frequency Voltage Mode
  • 500mA Peak Output Drive Capability
  • Protects the output when controlFET is shorted
  • RoHS Compliant


  Order Code SPEC Product series L
RDC typ.
RDC max.
Montageart LR
Material Version Samples
7445601 PDF WE-PD4 SMT Power Inductor 1 8.6 14.25 0.004 0.007 95 SMT
7443550320 PDF WE-HCI SMT Flat Wire High Current Inductor 3.2 16 15 34 2.2 5.3 WE-PERM SMT

Other applications and Würth Elektronik products for this IC

  • APU3037A
    Topology: Buck, Input Voltage (min.): 5.00 V, Input Voltage (max.): 5.00 V, Switching Frequency (min.): 180.00 kHz, Switching Frequency (max.): 220.00 kHz, Output 1: 3.30 V / 4.000 A