TPS54335-2A Datasheet, PDF (1/39 Pages) Texas Instruments – TPS54335-2A 4.5-V to 28-V Input, 3-A Output, Synchronous Step-Down DC-DC Converter

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TPS54335-2A 4.5-V to 28-V Input, 3-A Output, Synchronous
Step-Down DC-DC Converter
TPS54335-2A
SLUSCK3 – JULY 2016
1 Features
•1 Synchronous 128-mΩ and 84-mΩ MOSFETs for
3-A Continuous Output Current
• Internal 2-ms Soft-Start,
50-kHz to 1.5-MHz Adjustable Frequency
• Low 2-µA Shutdown, Quiescent Current
• 0.8-V Voltage Reference with ±0.8% Accuracy
• Current Mode Control
• Monotonic Startup into Pre-Biased Outputs
• Pulse Skipping for Light-Load Efficiency
• Hiccup Mode Overcurrent Protection
• Thermal Shutdown (TSD) and
Overvoltage Transition Protection
• 10-Pin VSON Package
2 Applications
• Consumer Applications such as a Digital TV
(DTV), Set Top Box (STB, DVD/Blu-ray Player),
LCD Display, CPE (Cable Modem, WiFi Router),
DLP Projectors, Smart Meters
• Battery Chargers
• Industrial and Car Audio Power Supplies
• 5-V, 12-V, and 24-V Distributed Power Bus Supply
3 Description
The TPS54335-2A synchronous converter with an
input-voltage range of 4.5 V to 28 V. This device has
an integrated low-side switching FET that eliminates
the need for an external diode which reduces
component count.
Efficiency is maximized through the integrated 128-
mΩ and 84-mΩ MOSFETs, low I_Q and pulse skipping
at light loads. Using the enable pin, the shutdown
supply current is reduced to 2 μA. This step-down
(buck) converter provides accurate regulation for a
variety of loads with a well-regulated voltage
reference that is 1.5% over temperature.
Cycle-by-cycle current limiting on the high-side
MOSFET protects the TPS54335-2A in overload
situations and is enhanced by a low-side sourcing
current limit which prevents current runaway. A low-
side sinking current-limit turns off the low-side
MOSFET to prevent excessive reverse current.
Hiccup protection is triggered if the overcurrent
condition continues for longer than the preset time.
Thermal shutdown disables the device when the die
temperature exceeds the threshold and enables the
device again after the built-in thermal hiccup time.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54335-2A
VSON (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
CBOOT
1 VIN BOOT 9
C1
LO
PH 3
RRT
C2
8 EN
NC 2
10 RT
VSENSE 6
7 COMP
CC
GND GND
RC
4
5
VOUT
CO
R01
R02
Copyright © 2016, Texas Instruments Incorporated
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.