ROHM, BD9859EFJ-E2 Step-Down Switching Regulator 3A Adjustable 8-Pin, HTSOP

  • RS Stock No. 171-5366
  • Mfr. Part No. BD9859EFJ-E2
  • Manufacturer ROHM
Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
Product Details

BD9859EFJ mainly used as secondary side Power supply, for example from fixed Power supply of 9V, 12V etc, Step-down Output of 1.2V/1.8V/3.3V/5V, etc, can be produced. This IC has external Coil/Capacitor down-sizing through 750kHz High Frequency operation, inside Nch-FET SW for 15V “withstand-pressure” commutation and also, High Speed Load Response through Current Mode Control is a simple external setting Phase compensation System, through a wide range external constant, a compact Power supply can be produced easily.

Internal 100 mΩ Nch MOSFET
Output Current 3A
Oscillation Frequency 750kHz
Feedback Voltage 1.0V±1.0%
Internal Soft Start Function
Internal Over Current Protect Circuit, Low Input Error Prevention Circuit, Heat Protect Circuit
ON/OFF Control through EN Pin (Standby Current 0μA Typ.)
Package :HTSOP-J8 Package
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Attribute Value
Maximum Output Current 3A
Regulator Function Buck Converter
Minimum Output Voltage 1 V
Minimum Input Voltage 5 V
Maximum Input Voltage 14 V
Output Type Adjustable
Mounting Type Surface Mount
Number of Outputs 1
Pin Count 8
Package Type HTSOP
Switching Regulator Yes
Minimum Operating Temperature -40 °C
Maximum Switching Frequency 825 kHz
Maximum Operating Temperature +85 °C
Width 3.9mm
Dimensions 4.9 x 3.9 x 0.85mm
Height 0.85mm
Length 4.9mm
Temporarily out of stock - back order for despatch 27/05/2020, delivery within 3 working days from despatch date
Price Each (On a Reel of 2500)
SGD 2.149
(exc. GST)
SGD 2.299
(inc. GST)
Per unit
Per Reel*
2500 - 2500
5000 - 7500
10000 +
*price indicative