TPS54361-Q1 Datasheet, PDF (1/50 Pages) Texas Instruments – TPS54361-Q1 4.5-V to 60-V Input, 3.5-A, Step Down DC-DC Converter with Soft-Start and Eco-mode

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TPS54361-Q1
SLVSCC4A – APRIL 2014 – REVISED APRIL 2014
TPS54361-Q1 4.5-V to 60-V Input, 3.5-A, Step Down DC-DC Converter with Soft-Start
and 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 Level H1C
– Device CDM ESD Classification Level C3B
• High Efficiency at Light Loads with Pulse Skipping
Eco-mode™
• 87-mΩ 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 PowerPAD™ 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, 24-V and 48-V Industrial, Automotive and
Communications Power Systems
3 Description
The TPS54361-Q1 device is a 60-V, 3.5-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 supply
current of 152-µA enables high efficiency at light
loads. 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 startup 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 the 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 TPS54361-Q1 device is available in a 10-pin 4
mm × 4 mm SON PowerPAD™ package.
Device Information⁽¹⁾
DEVICE NAME
PACKAGE
BODY SIZE
TPS54361-Q1
SON (10)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Simplified Schematic
VI
VIN
PWRGD
TPS54361-Q1
EN
BOOT
RT/CLK
VO
SS/TR
SW
COMP
FB
GND
1
Efficiency vs Load Current
100
95
90
85
80
75
70
65
VO = 12 V, Cs = 630 kHz
VO = 5 V and 3.3 V, Cs = 400 kHz
36 V to 12 V
12 V to 5 V
12 V to 3.3 V
60
0
0.5
1
1.5
2
2.5
3
3.5
Output Current (A)
D029
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.