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TPS54394RSAR Datasheet(PDF) 5 Page - Texas Instruments

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Part # TPS54394RSAR
Description  3A Dual Channel Synchronous Step-Down Switcher with Integrated FET
Download  28 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54394RSAR Datasheet(HTML) 5 Page - Texas Instruments

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background image
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)
PowerPAD
VFB1
VFB2
VIN1
VBST2
VBST1
14
7
5
6
2
3
4
1
VIN2
13
12
11
9
8
10
GND
16
15
VREG5
TPS54394
www.ti.com
SLVSBE6B – JUNE 2012 – REVISED AUGUST 2013
DEVICE INFORMATION
HTSSOP PACKAGE
RSA PACKAGE (TOP VIEW)
(TOP VIEW)
PIN FUNCTIONS(1)
PIN
I/O
DESCRIPTION
NAME
PWP
RSA
VIN1
1
3
I
Power inputs and connects to both high side NFET drains.
Supply Input for 5.5 V linear regulator.
VIN2
16
2
I
VBST1
2
4
I
Supply input for high-side NFET gate drive circuit. Connect 0.1 µF ceramic capacitor
between VBSTx and SWx pins. An internal diode is connected between VREG5 and
VBST2
15
1
I
VBSTx
SW1
3
5
I/O
Switch node connections for both the high-side NFETs and low–side NFETs. Input of
current comparator.
SW2
14
16
I/O
PGND1
4
6
I/O
Ground returns for low-side MOSFETs. Input of current comparator.
PGND2
13
15
I/O
EN1
5
7
I
Enable. Pull High to enable according converter.
EN2
12
14
I
PG1
6
8
O
Open drain power good output. Low means the output voltage of the corresponding
output is out of regulation.
PG2
11
13
O
VFB1
7
9
I
D-CAP2 feedback inputs. Connect to output voltage with resistor divider.
VFB2
10
12
I
GND
8
10
I/O
Signal GND. Connect sensitive SSx and VFBx returns to GND at a single point.
Output of 5.5 V linear regulator. Bypass to GND with a high-quality ceramic capacitor of
VREG5
9
11
O
at least 1 µF. VREG5 is active when ENx is high.
Exposed Thermal
Back
Back
Thermal pad of the package. Must be soldered to achieve appropriate dissipation. Must
I/O
Pad
side
side
be connected to GND.
(1)
x means either 1 or 2, that is, VFBx means VFB1 or VFB2.
Copyright © 2012–2013, Texas Instruments Incorporated
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