Texas Instruments TPS563211, User Manual

Page: 2 / 15

1 Introduction
The TPS563211 is a single, Advanced Emulated Current Mode (AECM) control, synchronous Buck converter,
being able to deliver 3-A continuous output current, providing selectable Eco-mode operation or FCCM operation
and selectable Power-Good indicator or external Soft-Start by the configuration of the MODE pin. Power
sequencing is possible by correctly configuring the Enable, Power-Good indicator or external Soft-Start. The
device implements an AECM control which can get fast transient response with fixed frequency. The fast
transient response results in low voltage drop and the fixed frequency brings a better jitter permanence and
predictable frequency for EMI design. The optimized internal compensation network minimizes the external
component counts and simplifies the control loop design over a wide voltage output range. Rated input voltage
and output current ranges for the evaluation module are given in
Table 1-1 .
The TPS563211EVM is a single, synchronous buck converter providing 3.3 V at 3 A from 4.2-V to 18-V input.
This user’s guide describes the TPS563211EVM performance.
Table 1-1. Input Voltage and Output Current Summary
EVM Input Voltage Range Output Current Range
TPS563211EVM V
IN
= 4.2 V to 18 V 0 A to 3 A
2 Performance Specification Summary
A summary of the TPS563211EVM performance specifications is provided in Table 2-1 . Test Specifications are
given for an input voltage of V
IN
= 12 V and an output voltage of 3.3 V, unless otherwise noted. The ambient
temperature is 25°C for all measurement, unless otherwise noted.
Table 2-1. Performance Specifications Summary
SPECIFICATIONS TEST CONDITIONS MIN TYP MAX UNIT
Input voltage range 4.2 12 18 V
Output voltage set point 3.3 V
Operating frequency V
IN
= 12 V, I
O
= 3 A 600 kHz
Output current range 0 3 A
Output ripple voltage V
IN
= 12 V, I
O
= 3 A 20 mV
PP
3 Modifications
This evaluation module is designed to provide access to the features of the TPS563211. Some modifications can
be made to this module.
3.1 MODE Pin Configuration
The TPS563211 has a MODE pin that can offer two different states of operation under light load conditions, and
offer two options for the function of Pin 1.
Table 3-1. MODE Pin Settings
MODE RESISTOR
RANGE
RECOMMENDED
MODE RESISTOR
VALUE
OPERATION MODE in
LIGHT LOAD
FUNCTION of PG/SS
PIN
[0, 12] kΩ 0 Eco-mode Power-Good
(1)
[30, 50] kΩ 47 kΩ Eco-mode Soft-Start
[83, 120] kΩ 100 kΩ FCCM Soft-Start
[180, ∞] kΩ Float FCCM Power-Good
(1) Connect pin 1 to GND to get a better thermal performance if the PG was not used when PG
function was selected.
Introduction www.ti.com
2 TPS563211 18-V Input, 3-A Output, 600-kHz, Synchronous Buck Converter
SOT583 Evaluation Module SLUUCC6 – SEPTEMBER 2020
Submit Document Feedback
Copyright © 2020 Texas Instruments Incorporated