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TPS54394 Datasheet(PDF) 5 Page - Texas Instruments

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Part # TPS54394
Description  3A Dual Channel Synchronous Step-Down Switcher with Integrated FET
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54394 Datasheet(HTML) 5 Page - Texas Instruments

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SW1
VIN1
VBST 1
EN1
VFB2
VFB1
GND
VREG5
PGND1
6
VIN2
VBST2
EN2
SW 2
PG1
5
1
3
PG2
9
10
11
PGND 2
2
4
7
13
12
14
8
15
16
TPS54394
HTSSOP16
(PowerPAD)
TPS54394
www.ti.com
SLVSBE6 – JUNE 2012
DEVICE INFORMATION
HTSSOP PACKAGE
(TOP VIEW)
PIN FUNCTIONS(1)
PIN
I/O
DESCRIPTION
NAME
NUMBER
VIN1, VIN2
1, 16
I
Power inputs and connects to both high side NFET drains.
Supply Input for 5.5V linear regulator.
VBST1, VBST2
2, 15
I
Supply input for high-side NFET gate drive circuit. Connect 0.1µF ceramic capacitor between
VBSTx and SWx pins. An internal diode is connected between VREG5 and VBSTx
SW1, SW2
3, 14
I/O
Switch node connections for both the high-side NFETs and low–side NFETs. Input of current
comparator.
PGND1, PGND2
4, 13
I/O
Ground returns for low-side MOSFETs. Input of current comparator.
EN1, EN2
5, 12
I
Enable. Pull High to enable according converter.
PG1, PG2
6, 11
O
Open drain power good output. Low means the output voltage of the corresponding output is
out of regulation.
VFB1, VFB2
7, 10
I
D-CAP2 feedback inputs. Connect to output voltage with resistor divider.
GND
8
I/O
Signal GND. Connect sensitive SSx and VFBx returns to GND at a single point.
VREG5
9
O
Output of 5.5V linear regulator. Bypass to GND with a high-quality ceramic capacitor of at least
1.0 µF. VREG5 is active when ENx is high.
Exposed Thermal
Back side
I/O
Thermal pad of the package. Must be soldered to achieve appropriate dissipation. Must be
Pad
connected to GND.
(1)
x means either 1 or 2, e.g. VFBx means VFB1 or VFB2.
Copyright © 2012, Texas Instruments Incorporated
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