NR131A Datasheet, PDF (11/15 Pages) Sanken electric – Ultra light load high efficiency

Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
NR130A series
Tentative
Sep/10/2013
Allowable package power dissipation
TBD
Allowable package powe disspation of NR130A series
NOTES:
1) Glass-epoxy board mounting in a 30×30mm
2) copper area : 25×25mm
3) The power dissipation is calculated at the junction temperature 125 °C
4) Losses can be calculated by the following equation.
As the efficiency is subject to the input voltage and output current, it shall be obtained from the efficiency curve and
substituted in percent
5) Thermal design for D1 shall be made separately.
PD

VO

IO

100
x
1_{}
･･･(1)
V_O: Output voltage
V_{IN :} Input voltage
I_{O :} Output current
ηx : Efficiency (%)
Vf: SJPB-L4 Io=3A/Vf=0.55V
Diode forward voltage (A to K)
Rev.1.1
SANKEN ELECTRIC CO., LTD.
11
http://www.sanken-ele.co.jp