TPS54561-Q1_16 Datasheet, PDF (1/51 Pages) Texas Instruments – TPS54561-Q1 4.5-V to 60-V Input, 5-A, Step-Down DC-DC Converter With Eco-mode

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TPS54561-Q1
SLVSC60 – SEPTEMBER 2014
TPS54561-Q1 4.5-V to 60-V Input, 5-A, Step-Down DC-DC Converter With Eco-mode™
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification H1C
– Device CDM ESD Classification C5
• High Efficiency at Light Loads With Pulse-
Skipping Eco-mode™ Control
• 87-mΩ High-Side MOSFET
• 152-µA Operating Quiescent Current and
2-µA Shutdown Current
• 100-kHz to 2.5-MHz Switching Frequency
• Synchronizes to External Clock
• Low-Dropout Operation at Light Loads With
Integrated BOOT Recharge FET
• Adjustable UVLO Voltage and Hysteresis
• Power-Good Output Monitor for Undervoltage and
Overvoltage
• Adjustable Soft-Start and Sequencing
• 0.8-V 1% Internal Voltage Reference
• 10-Pin SON With Thermal Pad Package
• –40°C to 150°C T_J Operating Range
• Supported by WEBENCH^® Software Tool
2 Applications
• Vehicle Accessories: GPS (see SLVA412),
Entertainment
• USB Dedicated Charging Ports and Battery
Chargers (see SLVA464)
• 12-V and 24-V Automotive Power Systems
Space
Space
Simplified Schematic
V_I
V_DD PWRGD
TPS54561-Q1
EN
BOOT
RT/CLK
V_O
SW
SS/TR
COMP
FB
GND
3 Description
The TPS54561-Q1 device is a 60-V, 5-A, step-down
regulator with an integrated high-side MOSFET. The
device survives load dump pulses up to 65 V per
ISO 7637. Current-mode control provides simple
external compensation and flexible component
selection. A low-ripple pulse-skip mode and 152-µA
supply current enables high efficiency at light loads.
Pulling the enable pin low reduces shutdown supply
current to 2 µA .
Undervoltage lockout has an internal 4.3-V setting.
Use of an external resistor divider at the EN pin can
increase the setting. The soft-start pin controls the
output-voltage start-up ramp and also configures
sequencing or 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
optimization for either efficiency or external
component size. Cycle-by-cycle current limit,
frequency foldback, and thermal shutdown protect the
device during an overload condition.
The TPS54561-Q1 is available in a 10-pin, 4-mm × 4-
mm SON package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54561-Q1
PWSON (10)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Efficiency vs Load Current
100
36 V to 12 V
95
90
85
12 V to 3.3 V
80
12 V to 5 V
75
70
65
60
0
V_O = 12 V, f_(SW) = 620 kHz
V_O = 5 V and 3.3 V, f_(SW) = 400 kHz
1
2
3
4
5
I_O - Output Current (A)
C024
1
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.