TPS57114-Q1 Datasheet, PDF (1/38 Pages) Texas Instruments – 2.95-V to 6-V Input, 4-A Output, 2-MHz, Synchronous Step-Down Switcher With Integrated FETs ( SWIFT™)

TPS57114-Q1
www.ti.com
SLVSAH5B – DECEMBER 2010 – REVISED APRIL 2012
2.95-V to 6-V Input, 4-A Output, 2-MHz, Synchronous Step-Down
Switcher With Integrated FETs ( SWIFT™)
Check for Samples: TPS57114-Q1
FEATURES
1
•2 Qualified for Automotive Applications
• Two 12-mΩ (typical) MOSFETs for High
Efficiency at 4-A Loads
• 200 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/Sequencing
• UV and OV Power Good Output
• –40°C to 150°C Operating Junction
Temperature Range
• Thermally Enhanced 3mm × 3mm 16-pin QFN
• Pin Compatible to TPS54418
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
SIMPLIFIED SCHEMATIC
vertical spacer
VIN
CI
C ss
RT
VIN
C_BOOT
BOOT
R4
TPS57114-Q1
LO
EN
PH
R5
CO
PWRGD
VSENSE
SS/TR
RT /CLK
COMP
GND
AGND
POWERPAD
R3
C1
VOUT
R1
R2
DESCRIPTION
The TPS57114-Q1 device is a full featured 6 V, 4 A,
synchronous step down current mode converter with
two integrated MOSFETs.
The TPS57114-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 x 3 mm thermally enhanced QFN
package.
The TPS57114-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.
Under voltage lockout is internally set at 2.45 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 fold back and thermal shutdown protects
the device during an over-current condition.
The TPS57114-Q1 is supported in the SwitcherPro™
Software Tool at www.ti.com/switcherpro.
For more SWIFT^TM documentation, see the TI
website at www.ti.com/swift.
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
I_O - Output Current - A
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, SwitcherPro, PowerPAD are trademarks of Texas Instruments.
2
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 © 2010–2012, Texas Instruments Incorporated