Datasheet

600
625
650
675
700
725
−40 −25 −10 5 20 35 50 65 80 95 110 125
Junction Temperature (°C)
EN Pin High−Level Threshold Voltage (mV)
290.0
290.5
291.0
291.5
292.0
292.5
−40 −25 −10 5 20 35 50 65 80 95 110 125
Junction Temperature (°C)
EN Pin Low−Level Threshold Voltage (mV)
488
490
492
494
496
498
500
502
504
−40 −25 −10 5 20 35 50 65 80 95 110 125
Junction Temperature (°C)
Switching Frequency (kHz)
V
VDD
= 4.5 V
V
VDD
= 12 V
f
SW
= 500 kHz
850
875
900
925
950
975
−40 −25 −10 5 20 35 50 65 80 95 110 125
Junction Temperature (°C)
Switching Frequency (kHz)
V
VDD
= 4.5 V
V
VDD
= 12 V
f
SW
= 1 MHz
594
595
596
597
598
599
600
601
602
−40 −25 −10 5 20 35 50 65 80 95 110 125
Junction Temperature (°C)
FB Pin Reference Voltage (mV)
300
301
302
303
304
305
306
−40 −25 −10 5 20 35 50 65 80 95 110 125
Junction Temperature (°C)
Switching Frequency (kHz)
V
VDD
= 4.5 V
V
VDD
= 12 V
f
SW
= 300 kHz
TPS56221
www.ti.com SLUSAH5B –MARCH 2011–REVISED SEPTEMBER 2012
TYPICAL CHARACTERISTICS
Figure 1. Reference Voltage vs. Junction Temperature Figure 2. Switching Frequency vs. Junction Temperature
(300 kHz)
Figure 3. Switching Frequency vs. Junction Temperature Figure 4. Switching Frequency vs. Junction Temperature (1
(500 kHz) MHz)
Figure 5. EN Pin High-Level Threshold Voltage vs. Junction Figure 6. EN Pin Low-Level Threshold Voltage vs. Junction
Temperature Temperature
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