Document
TPS568215
SLVSDI8C – OCTOBER 2016 – REVISED AUGUST 2023
TPS568215 4.5-V to 17-V Input , 8-A Synchronous Step-Down SWIFT™ Converter
1 Features
3 Description
• Integrated 19-mΩ and 9.4-mΩ MOSFETs • Selectable FSW of 400 kHz, 800 kHz, and 1.2 MHz • 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 • Selectable forced continuous conduction mode
(FCCM) for tight output voltage ripple or autoskipping Eco-mode™ for high light-load efficiency • 0.6-V to 5.5-V output voltage range • Supports all ceramic capacitors • Monotonic start-up 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 × 3.5-mm HotRod™ QFN package • Pin-to-pin compatible with 8-A TPS568231 and 12-A TPS56C231 and TPS56C215 • Supported at the WEBENCH® design center
2 Applications
• Server and storage • Set top box, high-end DTV • Telecom and networking, point-of-load (POL) • IPCs, factory automation
The TPS568215 is TI's smallest, monolithic, 8-A, synchronous buck converter with an adaptive ontime D-CAP3™ control mode. The device integrates low RDS(on) power MOSFETs that enable high efficiency and offers ease-of-use with minimum external component count for space-conscious power systems. Key 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 6 A to 12 A in the same footprint.
Package Information
PART NUMBER
PACKAGE(1)
BODY SIZE (NOM)
TPS568215
RNN (VQFN, 18) 3.5 mm × 3.5 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
TPS568215 VREG5
VIN VIN
CIN
PWRGD PGOOD
MODE BOOT
EN
SW
SS
CSS
FB
AGND PGND
RM_H RM_L LOUT
COUT
VREG5
VOOUUTT RUPPER RLOWER
Efficiency (%)
100
95
90
85
80
75
70
65
60
V IN
=4.5V,
V=
OUT
1.2V,
FSW =
400kHz
55
V IN=12V, VOUT=1.2V, FSW= 400kHz
50
V IN=17V, VOUT=1.2V, FSW = 400kHz
0
1
2
3
4
5
6
7
8
Output Current (A)
C011
Copyright © 2016, Texas Instruments Incorporated
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.
TPS568215
SLVSDI8C – OCTOBER 2016 – REVISED AUGUST 2023
www.ti.com
Table of Contents
1 Features............................................................................1 2 Applications..................................................................... 1 3 Description.......................................................................1 4 Revision History.............................................................. 2 5 Pin Configuration and Functions...................................3 6 Specifications.................................................................. 4
6.1 Absolute Maximum Ratings........................................ 4 6.2 ESD Ratings............................................................... 4 6.3 Recommended Operating Conditions.........................4 6.4 Thermal Information....................................................5 6.5 Electrical Characteristics.............................................5 6.6 Timing Requirements.................................................. 6 6.7 Typical Characteristics................................................ 7 7 Detailed Description...................................................... 11 7.1 Overview................................................................... 11 7.2 Functional Block Diagram......................................... 12
7.3 Feature Description...................................................13 7.4 Device Functional Modes..........................................17 8 Application and Implementation.................................. 19 8.1 Application Information............................................. 19 8.2 Typical Application.................................................... 19 8.3 Power Supply Recommendations.............................24 8.4 Layout....................................................................... 25 9 Device and Documentation Support............................28 9.1 Device Support......................................................... 28 9.2 Receiving Notification of Doc.