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Last Updated : 2004/11/02
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BellnixHigh Efficiency, Ultra Small size, Step-Down DC-DC Converter
BSI24-mini Series
Step Down High Efficiency DC-DC Converters__BSI24-mini +8V to +36V Input Series
High Efficiency (87%), TO-3PL size Step-Down DC-DC Converter
Input: +8V ~ +36V Output: +3.3V or +5V
- Latest technology, Synchronous Rectification Circuit
- TO-3PL wide type
- High Efficiency 87%
- Output Voltage 3.3V/5V select
- Heat sink not required
- Input voltage +8V ~ +36V
- Simple with High Reliability
- MTBF 1mil. Hours
- Slim type, Ultra Small size
- ON/OFF Control
- Built-in Over-Current protection
- Non-Isolated type between Input and Output
- Output Voltage changeable
- High Reliability, High Capacity
- Operating Temp.
___-10ºC ~ +70ºC
(Derating required from
50ºC)
- New Development MCM Power-IC
Models
BSI24-mini Series		 Input V
Vdc		 Output V
Vdc		 Output I
A		 Input Reg
%(typ)		 Load Reg
%(typ)		 Noise
mVpp(typ)		 Efficiency
%(typ)
BSI24-3/5S1R2 +8 ~ +36 +3.3/+5 0 ~ 1.2 2.0/ 2.5 0.4 40 83/ 87
BSI24-3/5S1R2-F
Note1: DIP type is described with "-F" at the end.
Note2: Ripple noise figure is when capacitor is added.

- BSI24-3/5S1R2__SIP type - BSI24-3/5S1R2F__DIP type
Weight = 4g typ
Unit: mm
Exterior is non-coating
Weight = 4.2g typ
Unit: mm
Exterior is non-coating
__Easy way to use
- Output Voltage select
5pin disconnected: Output=3.3V
5pin-3pin connected: Output=+5.0V
- ON/OFF Control
1pin-3pin connected: Output=ON
1pin-3pin disconnected: Output=OFF
- Recommended additional Capacitor
C1=120µF, 50WV ZL Series(Rubycon)
C2=220µF, 10WV SH type OS Capacitor(Sanyo)
With an additional 2.2µF ~ 4.7µF to the load end when the wire to the load is long, the noise will decrease furthermore.
- Note and request!
This is a product outline.
See the catalogue and application note,
when designing.
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