Iout

Vout

Iout

Vout

PG

EN

Thermal Guidelines and Layout Recommendations

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Figure 2. Load Step and Transient Response

4.3

Power Good

Figure 3 shows the operation of the Power Good (PG) output. Vin (6 V) is present and the chip is enabled

(c1, gold) The PG output (C3, blue) goes HIGH approximately 1.5 ms after Vout (C2, red) goes into

regulation.

Figure 3. Power Good Operation

5

Thermal Guidelines and Layout Recommendations

Thermal management is a key component of design for any power converter and is especially important

when the power dissipation in the LDO regulator is high. Use the following formula to approximate the

maximum power dissipation for the particular ambient temperature:

T

4

TPS7A1601EVM-046

SLVU549

– December 2011

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