Datasheet

Error
Amplifier
RQ
S
Boot
Charge
Boot
UVLO
Current
Sense
Oscillator
Frequency
Shift
Gate
Drive
Logic
Slope
Compensation
PWM
Latch
PWM
Comparator
ECO-MODE
MinimumClamp
™
Maximum
Clamp
Voltage
Reference
Discharge
Logic
VSENSE
COMP
PH
BOOT
VIN
GND
Thermal
Shutdown
EN
Enable
Comparator
Shutdown
Logic
Shutdown
Enable
Threshold
S
1.25V
0.8V
80mW
165C
2.1V
9 A/V
SS
Shutdown
VSENSE
1 Am
3 Am
gm=92 A/V
DCgain=800V/V
BW=2.7MHz
m
2kW
2 Am
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
T =25°C
J
T =-40°C
J
T =150°C
J
0
1
2
3
4
Isd-ShutdownCurrent- Am
3 8 13 18 23 28
V -InputVoltage-V
I
VIN=12V
290
295
300
305
310
-50 -25 0 25 50 75 100 125 150
T -JunctionTemperature-°C
J
fsw-OscillatorFrequency-kHz
TPS54233
www.ti.com SLUS859B –OCTOBER 2008– REVISED FEBRUARY 2011
FUNCTIONAL BLOCK DIAGRAM
TYPICAL CHARACTERISTICS
CHARACTERIZATION CURVES
ON RESISTANCE SHUTDOWN QUIESCENT CURRENT SWITCHING FREQUENCY
vs vs vs
JUNCTION TEMPERATURE INPUT VOLTAGE JUNCTION TEMPERATURE
Figure 1. Figure 2. Figure 3.
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