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TPS54326PWPR Fiches technique(PDF) 5 Page - Texas Instruments

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No de pièce TPS54326PWPR
Description  4.5V to 18V Input, 3-A Synchronous Step-Down Converter with Eco-mode
Download  30 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54326PWPR Fiches technique(HTML) 5 Page - Texas Instruments

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SW1
VBST
SS
VFB
GND
14
7
5
6
2
3
4
1
VREG5
13
12
11
9
8
10
SW2
16
15
SW3
EXPOSED
THERMAL
PAD
TPS54326
www.ti.com
SLVSA13E – OCTOBER 2009 – REVISED JUNE 2012
RGT PACKAGE
(TOP VIEW)
PIN FUNCTIONS
PIN
DESCRIPTION
NAME
PWP 14
RGT 16
VO
1
16
Connect to output of converter. This pin is used for On-Time Adjustment.
VFB
2
1
Converter feedback input. Connect with feedback resistor divider.
VREG5
3
2
5.5 V power supply output. A capacitor (typical 1
μF) should be connected to GND.
SS
4
3
Soft-start control. A external capacitor should be connected to GND.
GND
5
4
Signal ground pin
PG
6
5
Open drain power good output
EN
7
6
Enable control input
PGND1,
Ground returns for low-side MOSFET. Also serve as inputs of current comparators. Connect PGND
8, 9
7, 8
PGND2
and GND strongly together near the IC.
Switch node connection between high-side NFET and low-side NFET. Also serve as inputs to current
SW1, SW2
10, 11
9, 10, 11
comparators.
Supply input for high-side NFET gate driver (boost terminal). Connect capacitor from this pin to
VBST
12
12
respective SW1, SW2 terminals. An internal PN diode is connected between VREG5 to VBST pin.
VIN
13
13, 14
Power input and connected to high side NFET drain
VCC
14
15
Supply input for 5 V internal linear regulator for the control circuitry
Exposed
Thermal
Back
Back
Thermal pad of the package. Must be soldered to achieve appropriate dissipation. Should be
Pad or
side
side
connected to PGND.
PowerPAD
Copyright © 2009–2012, Texas Instruments Incorporated
5
Product Folder Link(s) :TPS54326


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