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TPS54561 Fiches technique(PDF) 1 Page - Texas Instruments

No de pièce TPS54561
Description  4.5-V to 60-V Input, 5-A, Step-Down DC-DC Converter
Download  53 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54561 Fiches technique(HTML) 1 Page - Texas Instruments

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0
1
2
3
4
5
I
O - Output Current (A)
C024
V
OUT = 12 V, fsw = 620kHz,
V
OUT = 5 V and 3.3 V, f sw = 400 kHz
12 V to 5 V
12 V to 3.3 V
36 V to 12 V
SW
VIN
GND
BOOT
FB
COMP
TPS54561
EN
RT/CLK
VIN
VOUT
SS/TR
PWRGD
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
TPS54561
SLVSBO1E – JULY 2013 – REVISED FEBRUARY 2016
TPS54561 4.5-V to 60-V Input, 5-A, Step-Down DC-DC Converter
with Soft-Start and Eco-mode™
1
1 Features
1
High Efficiency at Light Loads with Pulse Skipping
Eco-mode™
87-m
Ω High-Side MOSFET
152-
μA Operating Quiescent Current and
2-
μA Shutdown Current
100-kHz to 2.5-MHz Adjustable Switching
Frequency
Synchronizes to External Clock
Low Dropout at Light Loads with Integrated BOOT
Recharge FET
Adjustable UVLO Voltage and Hysteresis
UV and OV Power Good Output
Adjustable Soft-Start and Sequencing
0.8-V 1% Internal Voltage Reference
10-Pin SON with Thermal Pad Package
–40°C to 150°C TJ Operating Range
Supported by WEBENCH™ Software Tool
2 Applications
Industrial Automation and Motor Control
Vehicle Accessories: GPS (see SLVA412),
Entertainment
USB Dedicated Charging Ports and Battery
Chargers (see SLVA464)
12-V, 24-V and 48-V Industrial, Automotive and
Communications Power Systems
3 Description
The TPS54561 is a 60-V, 5-A, step down regulator
with an integrated high side MOSFET. The device
survives load dump pulses up to 65V per ISO 7637.
Current
mode
control
provides
simple
external
compensation and flexible component selection. A
low ripple pulse skip mode reduces the no load
supply current to 152
μA. Shutdown supply current is
reduced to 2
μA when the enable pin is pulled low.
Undervoltage lockout is internally set at 4.3 V but can
increase using an external resistor divider at the
enable pin. The output voltage start up ramp is
controlled by the soft start pin that can also be
configured for sequencing/tracking. An open drain
power good signal indicates the output is within 93%
to 106% of its nominal voltage.
A wide adjustable switching-frequency range allows
for optimization of either efficiency or external
component
size.
Cycle-by-cycle
current
limit,
frequency foldback and thermal shutdown protects
internal and external components during an overload
condition.
The TPS54561 is available in an 10-pin 4-mm × 4-
mm WSON package.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54561
WSON (10)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
space
Simplified Schematic
Efficiency vs Load Current


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