TPS65100 Datasheet, PDF (9/25 Pages) Texas Instruments – TRIPLE OUTPUT LCD SUPPLY WITH LINEAR REGULATOR AND VCOM BUFFER

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TYPICAL CHARACTERISTICS (continued)
TPS65100
TPS65105
SLVS496B – SEPTEMBER 2003 – REVISED MARCH 2004
SWITCHING FREQUENCY
vs
FREE-AIR TEMPERATURE
1.9
1.8
V_I = 2.7 V
1.7
V_I = 3.3 V
1.6
V_I = 5.8 V
1.5
1.4
1.3
−40 −20 0
20 40 60 80 100
T_A − Free-Air Temperature − °C
Figure 4.
PWM OPERATION AT LIGHT LOAD
V_SW
10 V/div
r_DS(on) N-CHANNEL MAIN SWITCH
vs
FREE-AIR TEMPERATURE
350
PWM OPERATION CONTINUOUS
MODE
300
Vo1 = 5 V
250
200
Vo1 = 10 V
V_SW
10 V/div
V_O
50 mV/div
150
Vo1 = 15 V
100
−40 −20 0
20 40 60 80 100
T_A − Free-Air Temperature − °C
Figure 5.
I_L
1 A/div
V_I = 3.3 V
V_O = 10 V/300 mA
250 ns/div
Figure 6.
LOAD TRANSIENT RESPONSE
Vo1
200 mV/div
LOAD TRANSIENT RESPONSE
Vo1
100 mV/div
V_I = 3.3 V
Vo1 = 10 V, C_O= 2*22 µF
V_O
50 mV/div
I_L
500 mA/div
V_I = 3.3 V
V_O = 10 V/10 mA
250 ns/div
Figure 7.
POWER-UP SEQUENCING
Vo1
5 V/div
Vo2
5 V/div
Vo3
10 V/div
VCOM
2 V/div
V_I = 3.3 V
V_O = 10 V,
VCOM C_I = 1 nF
500 µs/div
Figure 10.
I_O
50 mA to 250 mA
V_I = 3.3 V
Vo1 = 10 V, C_O= 22 µF
100 µs/div
I_O
50 mA to 250 mA
100 µs/div
Figure 8.
SOFT START Vo1
V_I = 3.3 V
V_O = 10 V,
I_O = 300 mA
Vo1
5 V/div
I_I
500
mA/div
500 µs/div
Figure 11.
Figure 9.
Vo2 MAXIMUM LOAD CURRENT
0.20
Vo2 = −8 V
0.18
0.16
T_A = −40°C
0.14
0.12
T_A = 85°C
0.10
T_A = 25°C
0.08
0.06
0.04
0.02
0
8.8
9.8 10.8 11.8 12.8 13.8 14.8
Vo1 − Output Voltage − V
Figure 12.
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