Datasheet

V = 2 V/div
OUT
Time = 2 ms/div
EN = 5 V/div
V = 5 V/div
IN
PWRGD = 5 V/div
V = 50 mV / div (ac coupled)
OUT
Time = 100 s/divm
I = 1 A / div
OUT
Load step = 1 - 3 A, slew rate = 0.167 A / sm
V = 2 V/div
OUT
Time = 2 ms/div
EN = 5 V/div
PWRGD = 5 V/div
V = 5 V/div
IN
V = 500 mV/div
OUT
Time = 2 msec / div
Pre-bias voltage = 500 mV
EN = 5 V/div
V = 2 V/div
OUT
Time = 2 ms/div
EN = 5 V/div
PWRGD = 5 V/div
V = 5 V/div
IN
V = 2 V/div
OUT
Time = 2 ms/div
EN = 5 V/div
V = 5 V/div
IN
PWRGD = 5 V/div
TPS54478
SLVSAS2 – JUNE 2011 www.ti.com
Figure 39. TRANSIENT RESPONSE, 2 A STEP Figure 40. POWER UP VOUT, VIN
Figure 41. POWER UP VOUT, EN Figure 42. POWER UP INTO PRE-BIAS VOLTAGE
Figure 43. POWER DOWN VOUT, VIN Figure 44. PWER DOWN VOUT, EN
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