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TPS54331 Datasheet(PDF) 4 Page - Texas Instruments

Part # TPS54331
Description  TPS54331 3-A, 28-V Input, Step Down DC-DC Converter With Eco-mode?
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS54331 Datasheet(HTML) 4 Page - Texas Instruments

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1
2
3
4
5
6
7
8
BOOT
VIN
EN
SS
PH
GND
COMP
VSENSE
PowerPAD
(Pin 9)
TM
1
2
3
4
5
6
7
8
BOOT
VIN
EN
SS
PH
GND
COMP
VSENSE
TPS54331
SLVS839F – JULY 2008 – REVISED OCTOBER 2014
www.ti.com
6 Pin Configuration and Functions
D Package
DDA Package
8-Pin SOIC
8-Pin SO With PowerPAD™
Top View
Top View
Pin Functions
PIN
I/O
DESCRIPTION
NO.
NAME
A 0.1-
μF bootstrap capacitor is required between the BOOT and PH pins. If the voltage on this
1
BOOT
O
capacitor falls below the minimum requirement, the high-side MOSFET is forced to switch off
until the capacitor is refreshed.
2
VIN
I
This pin is the 3.5- to 28-V input supply voltage.
This pin is the enable pin. To disable, pull below 1.25 V. Float this pin to enable. Programming
3
EN
I
the input undervoltage lockout with two resistors is recommended.
4
SS
I
This pin is slow-start pin. An external capacitor connected to this pin sets the output rise time.
5
VSENSE
I
This pin is the inverting node of the transconductance (gm) error amplifier.
This pin is the error-amplifier output and the input to the PWM comparator. Connect frequency
6
COMP
O
compensation components to this pin.
7
GND
—
Ground pin
8
PH
O
The PH pin is the source of the internal high-side power MOSFET.
The PowerPAD is only available on the DDA package. For proper operation, the GND pin
9
PowerPAD™
—
must be connected to the exposed pad
4
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Copyright © 2008–2014, Texas Instruments Incorporated
Product Folder Links: TPS54331


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