Datasheet

TPS54380
SLVS454B − JANUARY 2003 − REVISED FEBRUARY 2005
www.ti.com
10
AGND
BOOT
VSENSE
COMP
PWRGD
PH
PH
PH
PH
PH
RT
ENA
TRACKIN
VBIAS
VIN
VIN
VIN
PGND
PGND
PGND
VOUT
PH
Vin
TOPSIDE GROUND AREA
VIA to Ground Plane
ANALOG GROUND TRACE
EXPOSED
COMPENSATION
NETWORK
OUTPUT INDUCTOR
OUTPUT
FILTER
CAPACITOR
BOOT
CAPACITOR
INPUT
BYPASS
CAPACITOR
INPUT
BULK
FILTER
BIAS CAPACITOR
TRACKING VOLTAGE
POWERPAD
AREA
RESISTOR DIVIDER
NETWORK
Figure 10. TPS54380 PCB Layout
PERFORMANCE GRAPHS
Figure 11
50
55
60
65
70
75
80
85
90
95
100
0 0.5 1 1.5 2 2.5 3 3.5
V
I
= 3.3 V
V
I
= 5 V
Efficiency − %
EFFICIENCY
vs
OUTPUT CURRENT
I
O
− Output Current − A
Fi
g
ure 12
1.77
1.78
1.79
1.8
1.81
1.82
1.83
0 0.5 1 1.5 2 2.5 3 3.5
OUTPUT VOLTAGE
vs
OUTPUT CURRENT
I
O
− Output Current − A
− Output Voltage − V
V
O
V
I
= 3.3 V
V
I
= 5 V
Fi
g
ure 13
1.77
1.78
1.79
1.8
1.81
1.82
1.83
3456
V
I
− Input Voltage − V
− Output Voltage − V
V
O
I
O
= 0 A
I
O
= 1.5 A
I
O
= 3 A
OUTPUT VOLTAGE
vs
INPUT VOLTAGE