TPS57114-EP_15 Datasheet, PDF (1/43 Pages) Texas Instruments – TPS57114-EP 2.95-V to 6-V Input, 3.5-A Output, 2-MHz, Synchronous Step-Down SWIFT™ Converter

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TPS57114-EP
SLVSCG0 – JULY 2014
TPS57114-EP 2.95-V to 6-V Input, 3.5-A Output, 2-MHz, Synchronous Step-Down
SWIFT™ Converter
1 Features
•1 Two 12-mΩ (Typical) MOSFETs for High
Efficiency at 3.5-A Loads
• 200-kHz to 2-MHz Switching Frequency
• 0.8-V ±1% Voltage Reference Over Temperature
(–55°C to 125°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
• Supports Defense, Aerospace, and Medical
Applications
– Controlled Baseline
– One Assembly and Test Site
– One Fabrication Site
– Available in Military (–55°C to 125°C)
Temperature Range
– Extended Product Life Cycle
– Extended Product-Change Notification
– Product Traceability
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 TPS57114-EP device is a full-featured 6-V,
3.5-A, synchronous step-down current-mode
converter with two integrated MOSFETs.
The TPS57114-EP 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 TPS57114-EP provides accurate regulation for a
variety of loads with an accurate ±1% voltage
reference (VREF) over temperature.
The integrated 12-mΩ MOSFETs and 515-µA typical
supply current maximize efficiency. Entering
shutdown mode by using the enable pin reduces the
shutdown supply current to 5.5 µA.
The internal undervoltage lockout (UVLO) setting is
2.45 V, but programming the threshold with a resistor
network on the enable pin can increase it. The slow-
start pin controls the output-voltage start-up ramp. An
open-drain power-good signal indicates the output is
within 93% to 107% of its nominal voltage.
Device Information⁽¹⁾
ORDER NUMBER
PACKAGE
BODY SIZE (NOM)
TPS57114MRTETEP 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
VIN
CI
TPS57114-EP
C
BOOT
VIN
BOOT
R4
EN
LO
PH
R5
CO
C _ss
RT R3
C1
PWRGD
VSENSE
SS/TR
RT/CLK
COMP
GND
AGND
POWERPAD
VOUT
R1
R2
Efficiency vs Output Current
100
3 Vin
95
5 Vin
90
85
80
75
70
65
60
55
50
0
f_s = 500kHz
Vout = 1.8V
1
2
3
4
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.