Datasheet

TPS54110−Q1
SLVS837 − JULY 2008
www.ti.com
7
TYPICAL CHARACTERISTICS
Fi
g
ure 1
0.1
0.2
0.3
0.4
0.5
0.6
−40 0 25 85 125
0
I
O
= 1.5 A
V
I
= 3.3 V
T
J
− Junction Temperature − °C
DRAIN-SOURCE ON-STATE RESISTANC
E
vs
JUNCTION TEMPERATURE
Drain-Source On-State Resistance −
Ω
Fi
g
ure 2
0
0.1
0.2
0.3
0.4
−40 0 25
85
125
I
O
= 1.5 A
V
I
= 5 V
T
J
− Junction Temperature − °C
Drain-Source On-State Resistance −
DRAIN-SOURCE ON-STATE RESISTANC
E
vs
JUNCTION TEMPERATURE
Ω
Fi
g
ure 3
450
−40 0 25
f − Internally Set Oscillator Frequency −kHz
550
INTERNALLY SET OSCILLATOR
FREQUENCY
vs
JUNCTION TEMPERATURE
750
85 125
650
350
250
T
J
− Junction Temperature − °C
SYNC ≥ 2.5 V
SYNC ≤ 0.8 V
Figure 4
400
−40 0 25
f − Externally Set Oscillator Frequency − kHz
500
EXTERNALLY SET OSCILLATOR
FREQUENCY
vs
JUNCTION TEMPERATURE
800
85 125
700
300
200
T
J
− Junction Temperature − °C
600
RT = 68 k
RT = 100 k
RT = 180 k
Figure 5
0.889
−40 0 25
− Voltage Reference − V
VOLTAGE REFERENCE
vs
JUNCTION TEMPERATURE
0.895
85 125
0.893
0.887
0.885
T
J
− Junction Temperature − °C
0.891
V
ref
Figure 6
0.8850
0.8870
0.8890
0.8910
0.8930
0.8950
3456
f
S
= 350 kHz
T
A
= 85°C
V
I
− Input Voltage − V
− Output Voltage Regulation − V
OUTPUT VOLTAGE REGULATION
vs
INPUT VOLTAGE
V
O
Figure 7
f − Frequency − Hz
60
40
0
0 10 100 1 k 10 k 100 k 1 M
Gain − dB
80
100
ERROR AMPLIFIER
OPEN LOOP RESPONSE
140
10 M
120
20
−20
Phase − Degrees
0
−20
−40
−60
−80
−100
−120
−140
−160
−180
−200
R
L
= 10 kΩ,
C
L
= 160 pF,
T
A
= 25°C
Phase
Gain
Figure 8
T
J
− Junction Temperature − °C
3.35
3.20
2.90
−40 0 25 85
Internal Slow-Start Time − ms
3.50
3.65
INTERNAL SLOW-START TIME
vs
JUNCTION TEMPERATURE
125
3.80
3.05
2.75