TPS54388-Q1_15 Datasheet, PDF (1/40 Pages) Texas Instruments – TPS54388-Q1 2.95-V to 6-V Input, 3-A Output, 2-MHz, Synchronous Step-Down SWIFT™ Switcher

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TPS54388-Q1
SLVSAF1D – OCTOBER 2010 – REVISED APRIL 2015
TPS54388-Q1 2.95-V to 6-V Input, 3-A Output, 2-MHz, Synchronous Step-Down SWIFT™
Switcher
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 2
– Device CDM ESD Classification Level C4B
• Two 12-mΩ (typical) MOSFETs for High Efficiency
at 3-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
PWQFN
• 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 TPS54388-Q1 device is a full-featured 6-V, 3-A,
synchronous step-down current-mode converter with
two integrated MOSFETs.
The TPS54388-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 TPS54388-Q1 device provides accurate
regulation for a variety of loads with an accurate ±1%
voltage reference (V_ref) over temperature.
The integrated 12-mΩ MOSFETs and 515-μA typical
supply current maximize efficiency. Entering
shutdown mode using the enable pin reduces
shutdown supply current to 5.5 µA, typical.
The internal undervoltage lockout setting is at 2.45 V,
but programming the threshold with a resistor network
on the enable pin can increase the setting. The slow-
start pin sets 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)
TPS54388-Q1
PWQFN (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
TPS54388-Q1 C_(BOOT)
VIN
BOOT
R4
EN
L_(O)
PH
R5
C_(O)
PWRGD
VSENSE
SS/TR
RT/CLK
COMP
GND
R3
AGND
Thermal Pad
C1
V_O
R1
R2
100
95
90
85
80
75
70
65
60
55
50
0
V_(VIN) = 3 V
V_(VIN) = 5 V
f_(SW) = 500 kHz
V_O = 1.8 V
1
2
3
4
5
6
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.