TPS54618-Q1_16 Datasheet, PDF (1/42 Pages) Texas Instruments – Synchronous Step-Down SWIFT Switcher

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TPS54618-Q1
SLVSBY9D – AUGUST 2013 – REVISED JANUARY 2016
TPS54618-Q1 2.95-V to 6-V Input, 6-A Output, 2-MHz,
Synchronous Step-Down SWIFT™ Switcher
1 Features
•1 Qualified for Automotive Applications
• AEC Q-100 Qualified With the Following Results:
– Device Temperature Grade 1: Ambient
Operating Temperature Range of –40°C to
125°C
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C4B
• Two 12-mΩ (Typical) MOSFETs for High
Efficiency at 6-A Loads
• 300-kHz to 2-MHz Switching Frequency
• 0.8-V ±1% Voltage Reference Over Temperature
(–40°C to 150°C)
• Synchronizes to External Clock
• Adjustable Slow-Start and Sequencing
• UV and OV Power-Good Output
• Thermally-Enhanced 3-mm × 3-mm, 16-pin
WQFN Package
2 Applications
• Low-Voltage, High-Density Power Systems
• Point-of-Load Regulation for High-Performance
DSPs, FPGAs, ASICs, and Microprocessors
• Broadband, Networking, and Optical
Communications Infrastructure
3 Description
The TPS54618-Q1 device is a full-featured 6-V, 6-A,
synchronous step-down current-mode converter with
two integrated MOSFETs.
The TPS54618-Q1 enables small designs by
integrating the MOSFETs, implementing current-
mode control to reduce external component count,
reducing inductor size by enabling up to 2-MHz
switching frequency, and minimizing the IC footprint
with a small, 3-mm × 3-mm, thermally-enhanced
WQFN package.
The TPS54618-Q1 provides accurate regulation for a
variety of loads with an accurate ±1% voltage
reference (VREF) over temperature.
Efficiency is maximized through the integrated
12-mΩ MOSFETs and 515-μA typical supply current.
Using the enable pin, shutdown supply current is
reduced to 5.5-µA by entering a shutdown mode.
Undervoltage lockout is internally set at 2.6 V, but
can be increased by programming the threshold with
a resistor network on the enable pin. The output-
voltage startup ramp is controlled by the slow-start
pin. An open-drain power-good signal indicates the
output is within 93% to 107% of its nominal voltage.
Frequency foldback and thermal shutdown protect the
device during an overcurrent condition.
TPS54618-Q1 is supported in the SwitcherPro™
software tool at www.ti.com/switcherpro.
For more SWIFT™ documentation, see the TI
website at www.ti.com/swift.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54618-Q1
WQFN (16)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
VIN
TPS54618-Q1
VIN
BOOT
EN
PH
PWRGD
VSENSE
SS
RT/CLK
COMP
GND
AGND
PowerPad
VOUT
Efficiency vs Output Current
100
95
90
85
80
75
70
65
60
55
50
0
3 Vin
5 Vin
f_s = 500kHz
Vout = 1.8V
1
2
3
4
5
6
I_O - Output 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.