TPS568215 Datasheet, PDF (1/10 Pages) Texas Instruments – 4.5-V to 17-V Input , 8-A Synchronous Step-Down SWIFT™ Converter

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TPS568215
SLVSDI8 – OCTOBER 2016
TPS568215 4.5-V to 17-V Input , 8-A Synchronous Step-Down SWIFT™ Converter
1 Features
•1 Integrated 19-mΩ and 9-mΩ MOSFETs
• Support 8-A Continuous I_OUT
• 0.6V +/-1% Reference Voltage across full
temperature range
• 0.6 V to 5.5 V Output Voltage Range
• Supports Ceramic Output Capacitors
• D-CAP3™ Control Mode for Fast Transient
Response
• Selectable Forced Continuous Conduction Mode
(FCCM) for Tight Output Voltage Ripple or Auto-
Skipping Eco-mode™ for High Light-Load
Efficiency
• Selectable F_SW of 400 kHz, 800 kHz and 1.2 MHz
• Monotonic Start Up into Pre-biased Outputs
• Two Adjustable Current Limit Settings with Hiccup
Re-start
• Optional External 5V bias for Enhanced Efficiency
• 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
• Supported at the WEBENCH™ Design Center
2 Applications
• Server, Cloud-Computing, Storage
• Telecom & Networking, Point-of-Load (POL)
• IPCs, Factory Automation, Test Measurement
• High-End DTV
3 Description
The TPS568215 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 offers ease-of-use with minimum external
component count for space-conscious power
systems. Competitive features include a very
accurate reference voltage, fast load transient
response, auto-skip mode operation for light load
efficiency, 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 TPS568215 is available in a thermally
enhanced 18-pin HotRod™ QFN package and is
designed to operate from –40°C to 150°C junction
temperature. TPS568215 is pin to pin compatible with
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)
TPS568215
VQFN (18)
3.5 mm x 3.5 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
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Typical Application Schematic
Efficiency vs Output Current
TPS568215
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
100
95
90
85
80
75
70
65
60
VIN =4.5V, F_SW = 400kHz
55
VIN =12V, F_SW = 400kHz
50
VIN =17V, FSW = 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. PRODUCT PREVIEW Information. Product in design phase of
development. Subject to change or discontinuance without notice.