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| AAT2113A Datasheet, PDF (17/19 Pages) Advanced Analogic Technologies – 3MHz, Fast Transient 1.5A Step-Down Converter in 2mm x 2mm Package | |||
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PRODUCT DATASHEET
AAT2113A
SwitchRegTM 3MHz, Fast Transient 1.5A Step-Down Converter in 2mm x 2mm Package
Input Capacitor
For Input Ripple VPP = 30mV
CIN =
1
=
VPP
IO
- ESR
· 4 · FS
1
= 5.6μF; use 4.7μF
30mV - 5mΩ · 4 · 3MHz
1.5A
IRMS =
IOUT1
2
= 0.75A
P = ESR · (IRMS)2 = 5mΩ · (0.75A)2 = 2.8mW
AAT2113A Losses
All values assume 85°C ambient temperature and thermal resistance of 70°C/W in the 8-pin 2x2mm DFN low profile
package.
PTOTAL = IOUT2 · RDS(ON)H + (tSW · FSW · IOUT + IQ) · VIN
= 1.5A2 · 152mΩ + (5ns · 3MHz · 1.5A + 50μA) · 3.3V
= 416mW
TJ(MAX) = TAMB + ÎJA · PLOSS = 85°C + (70°C/W) · 416mW = 114°C
2113A.2009.06.1.1
www.analogictech.com
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