TC2575 Datasheet, PDF (23/25 Pages) TelCom Semiconductor, Inc – 1.0A Step-Down Switching Regulator

1.0A Step-Down Switching Regulator
TC2575
TYPICAL CHARACTERISTICS (Circuit of Figure 2 Cont.)
Figure 26. Standby Quiescent Current
120 _{TJ = 25°C}
100
80
60
40
20
0
0 5.0 10 15 20 25 30 35 40
VIN , INPUT VOLTAGE (V)
Figure 27. Standby Quiescent Current
120
VIN = 12V
100 ^{VON/OFF = 5.0V}
80
60
40
20
0
–50 –25
0
25
50
75 100 125
TJ, JUNCTION TEMPERATURE (°C)
Figure 28. Oscillator Frequency
2.0
Vin = 12V
0 ^{Normalized at 25°C}
–2.0
–4.0
–6.0
–8.0
–10
–0
–25
0
25
50
75 100 125
TJ, JUNCTION TEMPERATURE (°C)
Figure 29. Feedback Pin Current
40
Adjustable
Version Only
20
0
–20
–40
–50 –25
0
25
50
75 100 125
TJ, JUNCTION TEMPERATURE (°C)
OUTPUT 10 V
VOLTAGE
(PIN 2)
0
OUTPUT 1.0 A
CURRENT
(PIN 2)
0
INDUCTOR ^{1.0 A}
CURRENT _{0.5 A}
OUTPUT 20 mV
RIPPLE /DIV
VOLTAGE
Figure 30. Switching Waveforms
5.0 µsec/DIV
Figure 31. Load Transient Response
100
0
–100
1.0
0.5
0
100µsec/DIV
TC2575-1 3/13/00
23