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TPS40077PWPR Datasheet(PDF) 21 Page - Texas Instruments

Part # TPS40077PWPR
Description  TPS40077 4.5-V to 28-V Input, Voltage Mode, Synchronous Buck Controller With Voltage Feed Forward
PDF  45 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

TPS40077PWPR Datasheet(HTML) 21 Page - Texas Instruments

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R
SET
C
P2
R
PGD
R
T
C
PZ1
R
LIM
+
R
PZ2
C
SS
C
BP5
+
R
P1
R
Z1
C
DBP
C
DELAY
L
OUT
C
BOOST
7
FB
4
PGD
1
KFF
10
LDRV
13
HDRV
16
ILIM
8
COMP
5
SGND
2
RT
3
BP5
9
PGND
12
SW
15
VDD
14
BOOST
6
SS
11
DBP
PWP
R
KFF
C
Z2
QSW
QSR
C
VDD
V
=1.8V
I
upto10 A
OUT
OUT
R10
330kW
C11
0.1 F
m
0V
V
OUT
C
ELCO
IN
C_OUT
MLCC
C
ELCO
OUT
C13
2.2nF
R4
0 W
C_IN
MLCC
U1
TPS40077PWP
V
IN
S0239-01
21
TPS40077
www.ti.com
SLUS714E – JANUARY 2007 – REVISED JUNE 2019
Product Folder Links: TPS40077
Submit Documentation Feedback
Copyright © 2007–2019, Texas Instruments Incorporated
8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The TPS40077 allows the user to construct synchronous voltage-mode buck converters with inputs ranging from
4.5 V to 28 V and outputs as low as 700 mV. Predictive Gate Drive circuitry optimizes switching delays for
increased efficiency and improved converter output-power capability. Voltage feed-forward is employed to ease
loop compensation for wide-input-range designs and provide better line transient response.
The TPS40077 incorporates circuitry to allow startup into a preexisting output voltage without sinking current
from the source of the preexisting output voltage. This avoids damaging sensitive loads at start-up. An integrated
power-good indicator is available for logic (open-drain) output of the condition of the output of the converter.
8.2 Typical Applications
8.2.1 Buck Regulator 8-V to 16-V Input, 1.8-V Output at 10 A
Figure 28. Schematic Diagram
8.2.1.1 Design Requirements
Table 3 lists the design specifications and Table 4 lists the bill of materials for this buck regulator application
example.



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