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TPS54318RTET Datasheet(PDF) 5 Page - Texas Instruments

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Part # TPS54318RTET
Description  2.95V To 6V Input, 3A Output, 2MHz, Synchronous Step Down Switcher With Integrated FETs ( SWIFT??
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS54318RTET Datasheet(HTML) 5 Page - Texas Instruments

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PH
VIN
15
14
13
GND
12
11
10
9
8
7
6
5
16
GND
VIN
PH
PH
1
2
3
4
SS
Thermal
Pad
(17)
TPS54318
www.ti.com ......................................................................................................................................................................................... SLVS975 – SEPTEMBER 2009
PIN CONFIGURATION
QFN16
RTE PACKAGE
(TOP VIEW)
PIN FUNCTIONS
PIN
DESCRIPTION
NAME
NO.
AGND
5
Analog Ground should be electrically connected to GND close to the device.
BOOT
13
A bootstrap capacitor is required between BOOT and PH. If the voltage on this capacitor is below the minimum
required by the BOOT UVLO, the output is forced to switch off until the capacitor is refreshed.
COMP
7
Error amplifier output, and input to the output switch current comparator. Connect frequency compensation
components to this pin.
EN
15
Enable pin, internal pull-up current source. Pull below 1.2 V to disable. Float to enable. Can be used to set the
on/off threshold (adjust UVLO) with two additional resistors.
GND
3, 4
Power Ground. This pin should be electrically connected directly to the power pad under the IC.
PH
10, 11,
The source of the internal high side power MOSFET, and drain of the internal low side (synchronous) rectifier
12
MOSFET.
PowerPAD
17
GND pin should be connected to the exposed power pad for proper operation. This power pad should be
connected to any internal PCB ground plane using multiple vias for good thermal performance.
PWRGD
14
An open drain output, asserts low if output voltage is low due to thermal shutdown, overcurrent,
over/under-voltage or EN shut down.
RT/CLK
8
Resistor Timing or External Clock input pin.
SS
9
Slow-start. An external capacitor connected to this pin sets the output voltage rise time.
VIN
1, 2, 16
Input supply voltage, 2.95 V to 6 V.
VSENSE
6
Inverting node of the transconductance (gm) error amplifier.
Copyright © 2009, Texas Instruments Incorporated
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