TPS57112-Q1_15 Datasheet, PDF (1/41 Pages) Texas Instruments – TPS57112-Q1 2.95-V to 6-V Input, 2-A Output, 2-MHz, Synchronous Step-Down SWIFT™ Converter

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TPS57112-Q1
SLVSAL8C – DECEMBER 2010 – REVISED FEBRUARY 2015
TPS57112-Q1 2.95-V to 6-V Input, 2-A Output, 2-MHz, Synchronous Step-Down
SWIFT™ Converter
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C3B
• Two 12-mΩ (Typical) MOSFETs for High
Efficiency at 2-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 and Sequencing
• UV and OV Power-Good Output
• –40°C to 150°C Operating Junction Temperature
Range
• Thermally Enhanced 3-mm × 3-mm 16-Pin QFN
• Pin-Compatible to TPS54418
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 TPS57112-Q1 device is a full-featured 6-V, 2-A,
synchronous step-down current-mode converter with
two integrated MOSFETs.
The TPS57112-Q1 device 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 QFN
package.
The TPS57112-Q1 device provides accurate
regulation for a variety of loads with a ±1% voltage
reference (V_ref) over temperature.
The integrated 12-mΩ MOSFETs and 515-μA typical
supply current maximize efficiency. Using the enable
pin to enter the shutdown mode reduces supply
current to 5.5 µA, typical.
The internal undervoltage lockout setting is 2.45 V,
but programming the threshold with a resistor network
on the enable pin can increase the setting. The slow-
start pin controls the output-voltage start-up ramp. An
open-drain power-good signal indicates when the
output is within 93% to 107% of its nominal voltage.
Frequency foldback and thermal shutdown protect the
device during an overcurrent condition.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS57112-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.
4 Simplified Schematic
V_(VIN)
C_(I)
C_(SS)
Rt
TPS57112-Q1 C_(BOOT)
VIN
BOOT
R4
EN
R5
L_(O)
PH
C_(O)
PWRGD
VSENSE
SS/TR
RT/CLK
COMP
GND
R3
AGND
Thermal Pad
C1
V_O
R1
R2
Efficiency vs Output Current
100
V_(VIN) = 3 V
95
90
V_(VIN) = 5 V
85
80
75
70
65
60
55
50
0
f_(SW) = 500 kHZ
V_O = 1.8 V
0.5
1
1.5
2
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.