TPS54020_13 Datasheet, PDF (1/43 Pages) Texas Instruments – Small, 10-A, 4.5-V to 17-V Input, SWIFT Synchronous Step-Down Converter with Light-Load Efficiency

TPS54020
www.ti.com
SLVSB10C – JULY 2012 – REVISED MARCH 2013
Small, 10-A, 4.5-V to 17-V Input, SWIFT™ Synchronous Step-Down Converter with Light-
Load Efficiency
Check for Samples: TPS54020
FEATURES
1
•23 Integrated 8-mΩ and 6-mΩ MOSFETs
• Thermally Enhanced 3.5 mm × 3.5 mm
HotRod™ Package
• Peak Current Mode Control
• Eco-mode™Pulse Skip for Higher Efficiency
• Overcurrent Protection for Both MOSFETs
• Selectable Overcurrent Protection Schemes
• Selectable Overcurrent Protection Levels
• Split Power Rail: 1.6 V to 17 V on PVIN
• 0.6 V Voltage Reference With ±1% Accuracy
• 200-kHz to 1.2-MHz Switching Frequency
• Synchronizes to External Clock
• Start-Up into Pre-biased Outputs
• Over-Temperature and Overvoltage Protection
• –40°C to 150°C Operating Junction
Temperature Range
• Adjustable Soft-Start/Power Sequencing
• Power Good Output Monitor for Undervoltage
and Overvoltage
• SYNC_OUT Function Provides Output Clock
Signal 180° Out-of-Phase
• Supported by WEBENCH^® Software Tool
• For SWIFT™ Documentation and WEBENCH^®,
visit http://www.ti.com/swift
V_PVIN: 1.6 V to 17 V
V_VIN: 4.5 V to 17 V
TPS54020
PVIN
PWRGD
VIN
SYNC_OUT
EN
BOOT
ILIM
SS
PH
RT/CLK
COMP
HICCUP
RTN
VSENSE
PGND
L_OUT
V_OUT
C_OUT
UGD-13037
APPLICATIONS
• Power for FPGAs, SoCs, DSPs and Processors
• Wireless, Data, and Cloud Infrastructure
• Gaming, DTV, STB and Smart Grid Systems
DESCRIPTION
The TPS54020 is a 10-A, 4.5-V to 17-V input
SWIFT™ converter. The innovative 3.5 mm × 3.5 mm
HotRod™ package optimizes high-density step-down
designs. The TPS54020 is a full featured converter.
High efficiency is achieved through the innovative
integration and packaging of the high-side and low-
side MOSFETs. The TPS54020 operates at
continuous current mode (CCM) at higher load
conditions, and transitions to Eco-mode™ while
skipping pulses to boost the efficiency at light loads.
Current limiting on both MOSFETs provides device
and system protection. Cycle-by-cycle current limiting
in the high-side MOSFET protects for overload
situations. Low-side MOSFET zero current detection
turns off the low-side MOSFET while operating under
light loads. Three selectable current limit thresholds
allow a good fit for various applications. A hiccup or
cycle-by-cycle overcurrent protection scheme is also
selectable.
Thermal shutdown protection disables switching
when die temperature exceeds the thermal shutdown
trip point and enables switching after the built-in
thermal hysteresis and shutdown hiccup time.
96
T_A = 25°C
94
V_OUT = 1.8 V
f_SW = 500 kHz
92
90
88
86
84
V_IN = 5 V
82
V_IN = 12 V
V_IN = 17 V
80
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4
5
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7
8
9 10
Load Current (A)
G000
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SWIFT, HotRod, Eco-mode are trademarks of Texas Instruments.
2
WEBENCH is a registered trademark of Texas Instruments.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012–2013, Texas Instruments Incorporated