4CH Internal Power MOSFET System Switching Regulator - BD9866GUL

BD9866GUL is a 4ch DC/DC converter IC composed of Buck converter 3-channels and Buck-Boost converter 1-channel.Including power MOSFET of all channels reduces the number of peripheral devices. Each channel is controlled individually, that enables to reduce power consumption of not working channel.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
Constitution Materials List
BD9866GUL-E2 Active VCSP50L3 2500 2500 Taping inquiry Yes
ch 4
Vin1(Min.)[V] 4.0
Vin1(Max.)[V] 14.0
SW frequency(Max.)[MHz] 1.0
Operating Temperature (Min.)[°C] -25
Operating Temperature (Max.)[°C] 85
  • 1) Includes Buck converter (CH1, 2 and 4), and Buck-Boost converter (CH3), total 4 channels included.
    2) Includes Power MOSFET for all channels.
    3) Includes Over Current Protection (OCP) for all channels.
    4) Includes Short Circuit Protection (SCP.)
    5) Includes Undervoltage Lock Out (UVLO.)
    6) Includes Thermal Shut Down (TSD.)
    7) Includes Power Good(PG)
    8) External synchronous oscillation
    9) Each channel can be turn on/off individually.
    10) Contains internal compensation for all channels.
    11) Operation frequency of 1MHz.
    9) Includes cut off output voltage circuit during over current(timer latch type).
    10) Includes back-gate control for CH1 with soft start function.
    11) Select initial value by VOSEL2,3,4 terminal
    12) Includes Load SW which input are CH1 output.
Technical Data
Application Note

Thermal Resistance