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IRF7821 Datasheet(PDF) 25 Page - Texas Instruments

Part # IRF7821
Description  Dual-Synchronous, Step-Down Controller with Out-of-Audio??Operation and 100-mA LDOs for Notebook System Power
PDF  33 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

IRF7821 Datasheet(HTML) 25 Page - Texas Instruments

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TPS51123
DRVL1
DRVL2
PowerPAD
VFB1
VFB2
VREF
GND
VREG5
VREG3
220 nF
SGND
SGND
UDG-08166
5
3
2
5
19
15
33 mF
8
17
10 mF
V
IN
V
IN
V
OUT1
V
OUT2
PGND
PGND
Application Circuit
9
10
11
12
VO1
PGOOD
VO2
VREG3
TPS51123RGE
(QFN24)
13
14
15
16
VBST1
DRVL1
LL1
DRVH1
VBST2
DRVH2
LL2
DRVL2
17
8
7
6
5
4
3
2
1
18
19
20
21
22
23
24
VO1
5V/8A
L2
3.3mH
Q3
IRF7821
VO1_GND
PGND
C9
10mF
C7
0.1mF
VIN
VO2
3.3V/8A
L1
3.3mH
Q1
IRF7821
VO2_GND
C4
0.1mF
VIN
PowerPAD
C11
33 mF
C10
POSCAP
330mF
PGND
R9
5.1W
VIN
5.5 ~ 28V
R7
5.1W
C2
10mF
C1
10mF
PGND
C5
POSCAP
330 mF
5V/100mA
PGND
R4
30kW
R2
20kW
R1
13kW
SGND
VREG5
VREG5
R8
100kW
PGND
R3
20kW
C6
0.22mF
PGND
SGND
R6
130kW
SGND
R5
130kW
ENC
C3
10 mF
PGND
3.3V/100mA
C8
10 mF
EN0
PGND
PGND
SGND
Q2
FDS6690AS
Q4
FDS6690AS
UDG-08165
SGND
TPS51123
www.ti.com ........................................................................................................................................................................................... SLUS890 – DECEMBER 2008
Figure 37. GND system of DC/DC converter using the TPS51123
Figure 38. 5-V/8-A, 3.3-V/8-A Application Circuit (245-kHz/305-kHz Setting)
Copyright © 2008, Texas Instruments Incorporated
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Product Folder Link(s): TPS51123



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