TPS568215OA Datasheet, PDF (1/36 Pages) Texas Instruments – 4.5-V to 17-V Input , 8-A Synchronous Step-Down SWIFT Converter

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TPS568215OA
SLVSDU7 – JANUARY 2017
TPS568215OA 4.5-V to 17-V Input , 8-A Synchronous Step-Down SWIFT™ Converter
1 Features
•1 Integrated 19-mΩ and 9.4-mΩ MOSFETs
• Selectable F_SW of 400 kHz, 800 kHz or 1.2 MHz
• Out-of-Audio Feature to Keep Switching
Frequency Out of Audio Frequency Range
• Adjustable Current Limit Settings with Hiccup Re-
start
• 0.6 V ±1% Reference Voltage Across Full
Temperature Range
• Optional External 5-V Bias Support for Enhanced
Efficiency
• D-CAP3™ Control Mode for Fast Transient
Response
• 0.6 V to 5.5 V Output Voltage Range
• Supports all Ceramic Capacitors
• Monotonic Startup into Pre-biased Outputs
• Adjustable Soft Start with a Default 1-ms Soft
Start Time
• –40°C to 150°C Operating Junction Temperature
• Small 3.5-mm x 3.5-mm HotRod™ QFN Package
2 Applications
• Server and Storage
• Set top Box, High-End DTV
• Laptop and Gaming Systems
3 Description
The TPS568215OA is TI's smallest monolithic 8-A
synchronous buck converter with an adaptive on-time
D-CAP3™ control mode. The device integrates low
R_DS(on) power MOSFETs that enable high efficiency
and it offers ease-of-use with minimal external
component count for space-conscious power
systems. Key features include a very accurate
reference voltage, fast load transient response, Out-
of-Audio mode, adjustable current limit and no
requirement for external compensation. A forced
continuous conduction mode helps meet tight voltage
regulation accuracy requirements for performance
DSPs and FPGAs. The TPS568215OA is available in
a thermally enhanced 18-pin HotRod™ QFN package
and is designed to operate from –40°C to 150°C
junction temperature. TPS568215OA is pin to pin
compatible with TPS568215 and TPS56C215 which
gives the user flexibility to pick solutions from 6A to
12A in the same footprint.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS568215OA
VQFN (18)
3.50 mm x 3.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
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Typical Application Schematic
TPS568215OA
VREG5
VIN
V_IN
C_IN
PWRGD ^PGOOD
MODE
BOOT
EN
SW
SS
C_SS
FB
AGND PGND
R_{M_H}
R_{M_L}
L_OUT
C_OUT
VREG5
V_OOUUTT
R_UPPER
R_LOWER
Copyright © 2016, Texas Instruments Incorporated
Efficiency vs Output Current
100
95
90
85
80
75
70
65
60
V_IN =4.5V, V_OUT= 1.2V, F_SW= 400kHz
55
V _IN=12V, V_OUT=1.2V, F_SW= 400kHz
50
V _IN=17V, V_OUT=1.2V, F_SW = 400kHz
0
1
2
3
4
5
6
7
8
Output Current (A)
C011
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.