Datasheet

ERROR
AMPLIFIER
R Q
S
Boot
Charge
Boot
UVLO
Current
Sense
Oscillator
with PLL
Logic
Slope
Compensation
Logic
PWM
Latch
PWM
Comparator
Minimum
COMP Clamp
Maximum
Clamp
Voltage
Reference
Overload
Recovery
VSENSE
SS/TR
COMP
RT/CLK
PH
BOOT
VIN
GND
Thermal
Shutdown
Enable
Comparator
Shutdown
Logic
Shutdown
Enable
Threshold
TPS54478RTE Block Diagram
Logic
Shutdown
POWERPAD
PGND
Logic
Shutdown
107%
93%
TPS54478
SLVSAS2 –JUNE 2011 www.ti.com
PIN FUNCTIONS (continued)
PIN
DESCRIPTION
NAME NO.
VSENSE 6 Inverting node of the transconductance (gm) error amplifier.
FUNCTIONAL BLOCK DIAGRAM
6 Copyright © 2011, Texas Instruments Incorporated