TPS53315_15 Datasheet, PDF (26/35 Pages) Texas Instruments – Step-Down Regulator

TPS53315
SLUSAE6A – DECEMBER 2010 – REVISED DECEMBER 2015
10.2 Layout Example
VDD
GND
Keep VFB trace short and
away from noisy signals
VFB
Bottom side
components and trace
GND
VREG
GND shape
EN
TRIP
PGOOD
GND
VREG
VBST
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GND shape
Vout shape
Vin shape
LL shape
Figure 38. Layout Recommendation
10.3 Thermal Considerations
Figure 39 shows the thermal signature of the TPS53315 EVM at a switching frequency of 500 kHz. Figure 40
shows the thermal signature of the TPS53315 EVM at a switching frequency of 650 kHz
V_IN = 12 V
f_SW = 500 kHz
I_OUT= 12 A
V_OUT = 1.1 V
T_A = 25°C with no airflow
Figure 39. Thermal Signature of TPS53315 EVM
V_IN = 12 V
f_SW = 650 kHz
I_OUT= 12 A
V_OUT = 3.3 V
T_A = 25°C with no airflow
Figure 40. Thermal Signature of TPS53315 EVM
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