TPS5110_16 Datasheet, PDF (29/43 Pages) Texas Instruments – SYNCHRONOUS-BUCK PWM CONTROLLER WITH NMOS LDO CONTROLLER

TPS5110
APPLICATION INFORMATION
SLVS025B − APRIL 2002 − REVISED JULY 2004
PWM MODE EFFICIENCY
vs
OUTPUT CURRENT
100
VIN = 8 V
80
60
VIN = 12 V
AUTO SKIP MODE EFFICIENCY
vs
OUTPUT CURRENT
100
80
60
VIN = 8 V
VIN = 12 V
VIN = 20 V
40
40
20
VIN = 20 V
f _OSC = 300 kHz,
VO _{1 = 1.8 V}
20
VO1 = 1.8 V
0
0
0.01
0.1
1
10
0.01
0.1
1
10
Output Current − A
Figure 24
Output Current − A
Figure 25
SBRC OUTPUT LINE REGULATION
LDO OUTPUT LINE REGULATION
1.802
IO1 = 6 A
1.801
1.492
1.491
VO1 = VLDO_IN= 1.8 V
IO2 = 3 A
1.800
1.490
1.799
1.489
1.798
5
10
15
20
VIN − Input Voltage − V
Figure 26
1.488
15
5
10
15
20
15
VIN − Input Voltage − V
Figure 27
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