TPS65263-Q1_15 Datasheet, PDF (1/47 Pages) Texas Instruments – TPS65263-Q1 4.0- to 18-V Input Voltage, 3-A/2-A/2-A Output Current Triple Synchronous Step-Down Converter With I2C Controlled Dynamic Voltage Scaling

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TPS65263-Q1
SLVSCS9B – DECEMBER 2014 – REVISED JANUARY 2015
TPS65263-Q1 4.0- to 18-V Input Voltage, 3-A/2-A/2-A Output Current Triple Synchronous
Step-Down Converter With I²C Controlled Dynamic Voltage Scaling
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualification With the Following
Results:
– Device Temperature Grade 1: –40°C to 125°C
Operating Junction Temperature Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C4B
• Operating Input Voltage Range 4.0- to 18-V
Maximum Continuous Output Current 3 A/2 A/2 A
• I²C Controlled 7-Bits VID Programmable Output
Voltage from 0.68 to 1.95 V With 10-mV Voltage
Step for Buck2
• I²C Controlled VID Voltage Transition Slew Rate
for Buck2
• I²C Read Back Power Good Status, Overcurrent
Warning and Die Temperature Warning
• I²C Compatible Interface With Standard Mode
(100 kHz) and Fast Mode (400 kHz)
• Feedback Reference Voltage 0.6 V ±1%
• Adjustable Clock Frequency from 200 kHz to
2.3 MHz
• External Clock Synchronization
• Dedicated Enable and Soft-Start Pins for Each
Buck
• Output Voltage Power Good Indicator
• Thermal Overloading Protection
2 Applications
• Automotive
• Car Audio/Video
• Home Gateway and Access Point Networks
• Surveillance
Application Schematic
Vin
DVCC
SDA
SCL
PVINx
LX1
VIN
TPS65263Q1
FB1
PGOOD
ENx
SSx
LX2
Vout2
VOUT2
ROSC
FB2
SDA
SCL
AGND
LX3
FB3
PGND
Vout1
Vout2
Vout3
1
3 Description
The TPS65263-Q1 incorporates triple-synchronous
buck converters with 4.0- to 18-V wide input voltage.
The converter with constant frequency peak current
mode is designed to simplify its application while
giving designers options to optimize the system
according to targeted applications. The switching
frequency of the converters is adjustable from 200
kHz to 2.3 MHz with an external resistor. 180° out-of-
phase operation between buck1 and buck2, buck3
(buck2 and buck3 run in phase) minimizes the input
filter requirements.
The initial startup voltage of each buck can be set
with external feedback resistors. The output voltage
of buck2 can be dynamically scaled from 0.68 to 1.95
V in 10-mV steps with I²C-controlled 7 bits VID. The
VID voltage transition slew rate is programmable with
3-bits control through I²C bus to optimize
overshoot/undershoot during VID voltage transition.
Each buck in TPS65263-Q1 can be I²C controlled for
enabling/disabling output voltage, setting the pulse
skipping mode (PSM) or forced continuous current
(FCC) mode at light load condition and reading the
power-good status, overcurrent warning, and die
temperature warning.
The TPS65263-Q1 features overvoltage, overcurrent,
short-circuit, and overtemperature protection.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS65263-Q1
VQFN (32)
5.00 mm × 5.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Efficiency vs Output Load
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0
0.01 0.02
VIN 12 V VOUT 3.3 V
VIN 5 V VOUT 3.3 V
0.05 0.1 0.2 0.3 0.5 0.7 1
Output Load (A)
23
D002
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.