TPS54331-Q1
www.ti.com
SLVSAB5 –NOVEMBER 2010
FUNCTIONAL BLOCK DIAGRAM
EN
VIN
165C
Thermal
Shutdown
1 mA
3 mA
Shutdown
Shutdown
Logic
1.25 V
Enable
Threshold
Enable
Comparator
Boot
Charge
™
ECO-MODE
Minimum Clamp
Boot
UVLO
BOOT
2.1V
Error
Amplifier
12 A/V
Current
Sense
PWM
Comparator
PWM
Latch
VSENSE
R
Q
80 mW
2 mA
Gate
Drive
Logic
gm = 92 mA/V
DC gain = 800 V/V
BW = 2.7 MHz
S
Voltage
Reference
SS
Slope
Compensation
2 kW
S
0.8 V
Shutdown
PH
Discharge
Logic
VSENSE
Frequency
Shift
Oscillator
GND
COMP
Maximum
Clamp
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