TPS40077 Datasheet, PDF (36/42 Pages) Texas Instruments – HIGH-EFFICIENCY, MIDRANGE-INPUT, SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD

TPS40077
SLUS714 – JANUARY 2007
EXAMPLE APPLICATIONS (continued)
www.ti.com
+
V_DD
12 V
–
R6
165 kW
R2
165 kW
C2 0.1 mF
C3 22 nF
R5
C5
10 kW ^{5.6 nF}
C4 470 pF
TPS40077PWP
1 KFF
ILIM 16
R9
C7
2 kW ^{10 pF}
2 RT
VDD 15
3 LVBP BOOST 14
C10 0.1 mF
4 PGD HDRV 13
5 SGND
SW 12
D1
BAT54
C8
0.1 mF
C12 C14
22 mF 22 mF
L1
Pulse
Q1
PG0077.202
Si7840BDP
2 mH
6 SS
7 FB
DBP 11
LDRV 10
C9 1 mF
Q2
Si7856ADP
C13
4.7 nF
+
+
C15 C16 C17 C18
47 mF 470 mF 470 mF 0.1 mF
8 COMP PGND 9
PWP
+
V_OUT
1.8 V
10 A
–
R3
5.49 kW
R7 8.66 kW
C6
4.7 nF
R8
226 W
See the Boost Diode section.
Figure 35. 300 kHz, 12 V to 1.8 v With Improved High-Side Gate Drive
S0210-01
36
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