TPS54719_15 Datasheet, PDF (1/40 Pages) Texas Instruments – TPS54719 2.95 V To 6 V Input, 7-A Synchronous Step Down SWIFT™ Converter

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TPS54719
SLVSB69A – JUNE 2012 – REVISED JULY 2014
TPS54719 2.95 V To 6 V Input, 7-A Synchronous Step Down SWIFT™ Converter
1 Features
•1 Two 30 mΩ (typical) MOSFETs for High Efficiency
at 7-A loads
• 200kHz to 2MHz Switching Frequency
• 0.6 V ± 1.5% Voltage Reference Over
Temperature
• Adjustable Slow Start / Sequencing
• UV and OV Power Good Output
• Low Operating and Shutdown Quiescent Current
• Safe Start-up into Pre-Biased Output
• Cycle by Cycle Current Limit, Thermal and
Frequency Fold Back Protection
• –40°C to 140°C Operating Junction Temperature
Range
• Thermally Enhanced 3mm × 3mm 16-pin QFN
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 TPS54719 device is a full featured 6 V, 7 A,
synchronous step down current mode converter with
two integrated MOSFETs.
Simplified Schematic
VIN
CI
VIN
C_BOOT
BOOT
R4
TPS54719
LO
EN
PH
R5
CO
PWRGD
VOUT
R1
VSENSE
SS/TR
RT
COMP
GND
AGND
R2
C _ss
POWERPAD
RT
R3
C1
The TPS54719 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 3mm x
3mm thermally enhanced QFN package.
The TPS54719 provides accurate regulation for a
variety of loads with an accurate ±1.5% Voltage
Reference (VREF) over temperature.
Efficiency is maximized through the integrated 30 mΩ
MOSFETs and 455μA typical supply current. Using
the enable pin, shutdown supply current is reduced to
1 μA by entering a shutdown mode.
Under voltage lockout is internally set at 2.4 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 108% of its nominal voltage.
Frequency fold back and thermal shutdown protects
the device during an overcurrent condition.
The TPS54719 is supported in the Webench™
Software Tool at www.ti.com/webench.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54719
QFN (16)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Efficiency vs Output Current
100
90 ^{3.3 V}IN ^{/ 1.8 V}OUT
80
5 V_IN / 1.8 V_OUT
70
60
5 V_IN / 3.3 V_OUT
5 V_IN / 1.2 V_OUT
50
40
3.3 V_IN / 1.2 V_OUT
30
20
10
100
1k
Load Current (mA)
10k
G022
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.