7.5V to 15V, 2A Integrated MOSFET 1ch Synchronous Buck DC/DC Converter

Topology: Buck
Input Voltage (min.): 7.50 V
Input Voltage (max.): 15.00 V
Switching Frequency (min.): 500.00 kHz
Switching Frequency (max.): 800.00 kHz
Output 1: 1.00 V / 2.000 A
Output 2: 1.20 V / 2.000 A
Output 3: 1.80 V / 2.000 A
Output 4: 3.30 V / 2.000 A

Original publication on 2017-12-15, revision 004


BD95821MUV is a 1ch synchronous buck converter that can generate output voltage (0.8V to 5.5V) at the input voltage range (7.5V to 15V). Space-saving and high efficient switching regulator can be achieved due to built-in N-MOSFET power transistors. The IC also incorporates H3RegTM technology, a Rohm proprietary constant ON TIME control mode which facilitates ultra-high transient response against changes in load without external compensation components. Fixed soft start function, power good function, and short circuit / over voltage protection with timer latch functions are incorporated. The BD95821MUV is designed for power supplies for Digital AV Equipment.


  • ・Input Voltage Range: 7.5V to 15.0V・Reference Voltage: 0.8V±1.5%・Output Voltage Range: 0.8V to 5.5V・Output Current: 2.0A (Max.)・Switching Frequency: 500kHz to 800kHz(depend on input-output condition)・Built-in Power MOS FETHigh-side Nch FET ON resistance: 120mΩ(typ.)Low-side Nch FET ON resistance: 65mΩ(typ.)・Fast Transient Responses due to H3Reg control・Over Current Protection (OCP) – Cycle-by-Cycle・Thermal Shut Down (TSD)・Under-Voltage Lock-Out (UVLO)・Short Circuit Protection (SCP)・Over Voltage Protection (OVP)・Fixed Soft Start (1msec ; typ)・Power Good function


  Order Code SPEC Product series L
RDC typ.
RDC max.
Montageart Samples
74438336022 PDF WE-MAPI SMT Power Inductor 2.2 2.4 4.3 67 80 42 SMT
74438336033 PDF WE-MAPI SMT Power Inductor 3.3 2.2 4.25 99 114 39 SMT
74438336015 PDF WE-MAPI SMT Power Inductor 1.5 3.7 4.5 33 39 51 SMT

Other applications and Würth Elektronik products for this IC

  • BD95821MUV
    Topology: Buck, Input Voltage (min.): 10.00 V, Input Voltage (max.): 15.00 V, Switching Frequency (min.): 500.00 kHz, Switching Frequency (max.): 800.00 kHz, Output 1: 5.00 V / 2.000 A