Datasheet

60
65
70
75
80
85
90
95
100
105
110
-50 -25 0 25 50 75 100 125 150
T -JunctionTemperature-°C
J
Rdson-OnResistance-mW
VIN=12V
0
1
2
3
4
3 8 13 18 23 28
V -InputVoltage-V
I
Isd-ShutdownCurrent- Am
EN=0V
T =150°C
J
T =25°C
J
T =-40°C
J
550
555
560
565
570
575
580
585
590
-50 -25 0 25 50 75 100 125 150
fsw-OscillatorFrequency-kHz
T -JunctionTemperature-°C
J
VIN=12V
0.7760
0.7820
0.7880
0.7940
0.8000
0.8060
0.8120
0.8180
0.8240
-50 -25 0 25 50 75 100 125 150
Vref-VoltageReference-V
T -JunctionTemperature-°C
J
5.50
5.75
6
6.25
6.50
6.75
7
7.25
7.50
-50 -25 0 25 50 75 100 125 150
MinimumControllableDutyRatio-%
T -JunctionTemperature-°C
J
VIN=12V
100
110
120
130
140
-50 -25 0 25 50 75 100 125 150
Tonmin-MinimumControllableOnTime-ns
T -JunctionTemperature-°C
J
VIN=12V
3
4
5
6
3 8 13 18 23 28
V -InputVoltage-V
I
CurrentLimitThreshold- A
T =150°C
J
T =25°C
J
T =-40°C
J
1.90
2
2.10
-50 -25 0 25 50 75 100 125 150
I -SlowStartChargeCurrent- A
SS
m
T -JunctionTemperature-°C
J
TPS54331
SLVS839D –JULY 2008– REVISED JANUARY 2012 www.ti.com
CHARACTERIZATION CURVES
ON RESISTANCE SHUTDOWN QUIESCENT CURRENT SWITCHING FREQUENCY
vs vs vs
JUNCTION TEMPERATURE INPUT VOLTAGE JUNCTION TEMPERATURE
Figure 2. Figure 3. Figure 4.
MINIMUM CONTROLLABLE ON MINIMUM CONTROLLABLE DUTY
VOLTAGE REFERENCE TIME RATIO
vs vs vs
JUNCTION TEMPERATURE JUNCTION TEMPERATURE JUNCTION TEMPERATURE
Figure 5. Figure 6. Figure 7.
SS CHARGE CURRENT CURRENT LIMIT THRESHOLD
vs vs
JUNCTION TEMPERATURE INPUT VOLTAGE
Figure 8. Figure 9.
6 Copyright © 2008–2012, Texas Instruments Incorporated