TPS54116-Q1 Datasheet, PDF (1/41 Pages) Texas Instruments – 2.95-V to 6-V Input, 4-A Step-Down Converter and 1-A Source/Sink DDR Termination Regulator

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TPS54116-Q1
SLVSCO3A – AUGUST 2016 – REVISED AUGUST 2016
TPS54116-Q1 2.95-V to 6-V Input, 4-A Step-Down Converter and 1-A Source/Sink DDR
Termination Regulator
1 Features
•1 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 2
– Device CDM ESD Classification Level C6
• Single-chip DDR2, DDR3 and DDR3L Memory
Power Solution
• 4-A Synchronous Buck Converter
– Integrated 33-mΩ High-side and 25-mΩ Low-
side MOSFETs
– Fixed Frequency Current-mode Control
– Adjustable Frequency from 100 kHz to 2.5
MHz
– Synchronizable to an External Clock
– 0.6-V ±1% Voltage Reference Over
Temperature
– Adjustable Cycle-by-Cycle Peak Current Limit
– Monotonic Start-up Into Pre-biased Outputs
• 1-A Source/Sink Termination LDO with ±20-mV
DC Accuracy
– Stable with 2 × 10-µF MLCC Capacitor
– 10-mA Source/Sink Buffered Reference Output
Regulated to Within 49% to 51% of VDDQ
• Independent Enable Pins with Adjustable UVLO
and Hysteresis
• Thermal Shutdown
• -40°C to 150°C Operating T_J
• 24-pin, 4-mm x 4-mm WQFN Package
2 Applications
• DDR2, DDR3, DDR3L, and DDR4 Memory Power
Supplies in Embedded Computing Systems
• SSTL_18, SSTL_15, SSTL_135, SSTL_12 and
HSTL Termination
• Infotainment and Cluster
• Advanced Driver Assistance Systems (ADAS)
3 Description
The TPS54116-Q1 device is a full featured 6-V, 4-A,
synchronous step down converter with two integrated
MOSFETs and 1-A sink/source double date rate
(DDR) VTT termination regulator with VTTREF
buffered reference output.
The TPS54116-Q1 buck regulator minimizes solution
size by integrating the MOSFETs and reducing
inductor size with up to 2.5-MHz switching frequency.
The switching frequency can be set above the
medium wave radio band for noise sensitive
applications and is synchronizable to an external
clock. Synchronous rectification keeps the frequency
fixed across the entire output load range. Efficiency is
maximized through integrated 25-mΩ low-side and
33-mΩ high-side MOSFETs. Cycle-by-cycle peak
current limit protects the device during an overcurrent
condition and is adjustable with a resistor at the ILIM
pin to optimize for smaller inductors.
The VTT termination regulator maintains fast
transient response with only 2 × 10-µF ceramic
output capacitance reducing external component
count. The TPS54116-Q1 uses remote sensing of
VTT for best regulation.
Using the enable pins to enter a shutdown mode
reduces supply current to 1-µA. Under voltage
lockout thresholds can be set with a resistor network
on either enable pin. The VTT and VTTREF outputs
are discharged when disabled with ENLDO.
Full integration minimizes the IC footprint with a small
4 mm × 4 mm thermally enhanced WQFN package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54116-Q1
WQFN (24)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
VIN
TPS54116-Q1
AVIN
BOOT
ENSW
SW
ENLDO
PVIN
PGOOD
PGND
ILIM
VDDQSNS
SS/TRK
LDOIN
COMP
VTT
FB
VTTSNS
AGND
VTTGND
RT/SYNC
PAD
VTTREF
VIN
VDDQ
VTT
VTTREF
Copyright © 2016, Texas Instruments Incorporated
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.