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TPS54980PWP Datasheet(PDF) 5 Page - Texas Instruments

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Part # TPS54980PWP
Description  3-V TO 4-V INPUT 9-A OUTPUT TRACKING SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETS FOR SEQUENCING
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS54980PWP Datasheet(HTML) 5 Page - Texas Instruments

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TPS54980
SLVS452A − FEBRUARY 2003 − REVISED FEBRUARY 2005
www.ti.com
5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
AGND
VSENSE
COMP
PWRGD
BOOT
PH
PH
PH
PH
PH
PH
PH
PH
PH
RT
ENA
TRACKIN
VBIAS
VIN
VIN
VIN
VIN
VIN
PGND
PGND
PGND
PGND
PGND
PWP PACKAGE
(TOP VIEW)
THERMAL
PAD
TERMINAL FUNCTIONS
TERMINAL
DESCRIPTION
NAME
NO.
DESCRIPTION
AGND
1
Analog ground. Return for compensation network/output divider, slow-start capacitor, VBIAS capacitor, RT resistor.
Connect PowerPAD to AGND.
BOOT
5
Bootstrap output. 0.022-
µF to 0.1-µF low-ESR capacitor connected from BOOT to PH generates floating drive for the
high-side FET driver.
COMP
3
Error amplifier output. Connect frequency compensation network from COMP to VSENSE
ENA
27
Enable input. Logic high enables oscillator, PWM control and MOSFET driver circuits. Logic low disables operation and
places device in low quiescent current state.
PGND
15−19
Power ground. High current return for the low-side driver and power MOSFET. Connect PGND with large copper areas
to the input and output supply returns, and negative terminals of the input and output capacitors. A single point connection
to AGND is recommended.
PH
6−14
Phase output. Junction of the internal high-side and low-side power MOSFETs, and output inductor.
PWRGD
4
Power good open drain output. High when VSENSE
≥ 90% Vref, otherwise PWRGD is low.
RT
28
Frequency setting resistor input. Connect a resistor from RT to AGND to set the switching frequency.
TRACKIN
26
External reference input. High impedance input to internal reference/multiplexer and error amplifier circuits.
VBIAS
25
Internal bias regulator output. Supplies regulated voltage to internal circuitry. Bypass VBIAS pin to AGND pin with a high
quality, low-ESR 0.1-
µF to 1.0-µF ceramic capacitor.
VIN
20−24
Input supply for the power MOSFET switches and internal bias regulator. Bypass VIN pins to PGND pins close to device
package with a high quality, low-ESR 10-
µF ceramic capacitor.
VSENSE
2
Error amplifier inverting input. Connect to output voltage through compensation network/output divider.


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