Datasheet

TPS5103
MULTIPLE MODE SYNCHRONOUS DC/DC CONTROLLER
SLVS240A – SEPTEMBER 1999 – REVISED MAY 2001
16
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 27
V
CC
= 4.5 V,
V
CC
= 7 V,
V
CC
= 25 V
V
CC
= 4.5 V,
V
CC
= 7 V,
V
CC
= 25 V
f = 500 kHz
f = 200 kHz
300
200
100
0
–40 –20 25
– Oscillator Frequency – kHz
400
500
OSCILLATOR FREQUENCY
vs
JUNCTION TEMPERATURE
600
85 125
f
osc
T
J
– Junction Temperature – °C
Figure 28
V
OSCH
V
OSCL
1
0.8
0.4
0
10 100
– Oscillator Output Voltahe – V
1.2
1.4
OSCILLATOR OUTPUT VOLTAGE
vs
FREQUENCY
1.6
1000
0.6
0.2
V
OSCH,
V
OSCL
f
OSC
– Frequency – kHz
Figure 29
Phase
Gain
30
10
0
–20
1 k 10 k 100 k
Error Amplifier Gain – dB
40
50
f – Frequency – Hz
ERROR AMPLIFIER GAIN AND PHASE SHIFT
60
1 M 10 M
R
s
= 100 Ω,
R
f
= 10 kΩ
20
–10
100
20
–60
140
180
60
–20
Phase Shift – Deg