TPS5401_15 Datasheet, PDF (1/45 Pages) Texas Instruments – TPS5401 0.5-A, 42-V Input, Step-Down SWIFT™ Converter

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TPS5401
SLVSAB0A – DECEMBER 2010 – REVISED NOVEMBER 2014
TPS5401 0.5-A, 42-V Input, Step-Down SWIFT™ Converter
1 Features
•1 3.5-V to 42-V Input Voltage Range
• 200-mΩ High-Side MOSFET
• High Efficiency at Light Loads With a Pulse-
Skipping Eco-mode™ Control Scheme
• 116-μA Operating Quiescent Current
• 1.3-μA Shutdown Current
• 100-kHz to 2.5-MHz Switching Frequency
• Synchronizes to External Clock
• Adjustable Slow Start/Sequencing
• UV and OV Power-Good Output
• Adjustable UVLO Voltage and Hysteresis
• 0.8-V ±3.5% Internal Voltage Reference
• MSOP10 With PowerPAD™ Package
• Supported by WEBENCH
• For SWIFT™ Power Products Documentation,
see http://www.ti.com/swift
2 Applications
• 12-V and 24-V Industrial and Commercial Low-
Power Systems
• E-Meters
3 Description
The TPS5401 device is a 42-V, 0.5-A, step-down
regulator with an integrated high-side MOSFET.
Current-mode control provides simple external
compensation and flexible component selection. A
low-ripple pulse-skip mode reduces the supply
current to 116 μA when outputting regulated voltage
with no load. Using the enable pin, shutdown supply
current is reduced to 1.3 μA when the enable pin is
low.
Undervoltage lockout is internally set at 2.5 V, but
can be increased using the enable pin. The output
voltage start-up ramp is controlled by the slow-start
pin that can also be configured for
sequencing/tracking. An open-drain power-good
signal indicates the output is within 94% to 107% of
its nominal voltage.
A wide switching-frequency range allows efficiency
and external component size optimization. Frequency
foldback and thermal shutdown protect the part
during an overload condition.
The TPS5401 is available in a 10-pin thermally
enhanced MSOP PowerPAD package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS5401
MSOP (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
V_IN
CIN
VIN
PWRGD
TPS5401
EN
SS/TR
RT/CLK
BOOT
PH
CBOOT
LOUT
COUT
RT
R3
COMP _VSENSE
CSS
C2
C1
GND
V_OUT
R1
R2
Efficiency vs. Load Current
100
90
80
70
60
50
40
30
V_IN = 12 V
20
V_OUT = 5 V
10
f_SW = 700 kHz
0
0
0.1
0.2
0.3
0.4
0.5
Load Current – A
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.