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TPS62140RGTR Datasheet(PDF) 4 Page - Texas Instruments

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No. de pieza TPS62140RGTR
Descripción Electrónicos  3-V to 17-V 2-A Step-Down Converter in 3-mm3-mm QFN Package
Download  34 Pages
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

TPS62140RGTR Datasheet(HTML) 4 Page - Texas Instruments

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3
Exposed
Thermal Pad
9
10
11
12
8
7
6
5
4
2
1
16
15
14
13
PVIN
PVIN
AVIN
SS/TR
SW
SW
SW
PG
TPS62140
TPS62141, TPS62142, TPS62143
SLVSAJ0
– NOVEMBER 2011
www.ti.com
DEVICE INFORMATION
RGT PACKAGE
(TOP VIEW)
Terminal Functions
PIN(1)
I/O
DESCRIPTION
NAME
NO.
SW
1, 2 ,3
O
Switch node, which is connected to the internal MOSFET switches. Connect inductor between SW and
output capacitor.
PG
4
O
Output power-good (High = VOUT ready, Low = VOUT below nominal regulation); open-drain (requires
pullup resistor; goes high-impedance when device is switched off)
FB
5
I
Voltage feedback of adjustable version. Connect resistive voltage divider to this pin. Its recommended to
connect FB to AGND on fixed output-voltage versions for improved thermal performance.
AGND
6
Analog ground
FSW
7
I
Switching frequency select (Low
≈ 2.5 MHz, High ≈ 1.25 MHz for typical operation)(2)
DEF
8
I
Output voltage scaling (Low = nominal, High = nominal + 5%)(2)
Soft-start / tracking pin. An external capacitor connected to this pin sets the internal voltage-reference rise
SS/TR
9
I
time. It can be used for tracking and sequencing.
AVIN
10
I
Supply voltage for control circuitry. Connect to same source as PVIN.
PVIN
11, 12
I
Supply voltage for power stage. Connect to same source as AVIN.
EN
13
I
Enable input (High = enabled, Low = disabled)(2)
VOS
14
I
Output-voltage sense pin and connection for the control loop circuitry.
PGND
15, 16
Power ground
Exposed
Must be connected to AGND. Must be soldered to achieve appropriate power dissipation and mechanical
thermal pad
reliability.
(1)
For more information about connecting pins, see the DETAILED DESCRIPTION and APPLICATION INFORMATION sections.
(2)
An internal pulldown resistor keeps the logic level low, if pin is floating.
4
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Copyright
© 2011, Texas Instruments Incorporated
Product Folder Link(s): TPS62140 TPS62141 TPS62142 TPS62143


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