AAT1230/1230-1
18V 100mA Step-Up Converter
Boost Converter Design Example
Specification
VOUT = 16V
IOUT = 100mA
VIN = 2.7V to 4.2V (3.6V nominal)
TAMB = 50°C
Schottky Diode
VO - VIN(MIN)
VIN(MIN)
16 - 2.7
2.7
DMAX
=
=
= 0.831
IOUT
1 - DMAX
0.1A
1 - 0.831
IOFF(DIODE)
=
=
= 0.592A = 592mA
For Schottky diode MBR0530, VF ≈ 0.32 @ 600mA, θJA ≈ 206°C/W in SOD-123 package.
PLOSS(DIODE) = IOUT
TJ(DIODE) = TAMB
·
VF = (0.1A)(0.32V) = 0.032W = 32mW
+
θJA PLOSS(DIODE)
·
= 50 + 206 · (0.032)
= 50 + 6.6
= 56.6°C
16V Output Inductor
VOUT + VF - VIN(MIN)
OUT + VF
DMAX
=
=
V
16 + 0.32 - 2.7
16 + 0.32
= 0.834
16
1230.2007.06.1.6
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