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| AAT1230 Datasheet, PDF (16/21 Pages) Advanced Analogic Technologies – 18V 100mA Step-Up Converter | |||
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AAT1230
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
DMAX =
VO - VIN(MIN)
VIN(MIN)
=
16 - 2.7
2.7
= 0.831
I = OFF(DIODE)
IOUT
1 - DMAX
=
1
0.1A
- 0.831
=
0.592A
=
592mA
For Schottky diode MBR0530, VF â 0.32 @ 600mA, θJA â 206°C/W in SOD-123 package.
PLOSS(DIODE) = IOUT · VF = (0.1A)(0.32V) = 0.032W = 32mW
TJ(DIODE) = TAMB + θJA · PLOSS(DIODE)
= 50 + 206 · (0.032)
= 50 + 6.6
= 56.6°C
16V Output Inductor
DMAX =
VOUT + VF - VIN(MIN)
VOUT + VF
=
16
+ 0.32 - 2.7
16 + 0.32
=
0.834
From Switching Frequency vs. IOUT curves estimated switching frequency of AAT1230 with VOUT = 16V and
IOUT = 100mA, FSW = 800kHz.
16
1230.2006.03.1.0
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