Texas Instruments Evaluation Module for TPS54426 4.5V to 18V Input, 4A Synchronous Step-Down SWIFT Converter TPS54426EVM TPS54426EVM-608 Datenbogen
Produktcode
TPS54426EVM-608
Introduction
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List of Tables
1
Input Voltage and Output Current Summary
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2
TPS54426 EVM and Performance Specifications Summary
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3
Output Voltages
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4
Connection and Test Points
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5
Bill of Materials
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1
Introduction
This user’s guide contains background information for the TPS54426 as well as support documentation for
the TPS54426EVM-608 evaluation module. Also included are the performance specifications, schematic
and the bill of materials for the TPS54426EVM-608.
the TPS54426EVM-608 evaluation module. Also included are the performance specifications, schematic
and the bill of materials for the TPS54426EVM-608.
1.1
Background
The TPS54426 is a single, adaptive on-time D-CAP2™ mode synchronous buck converter requiring a very
low external component count. The D-CAP2™ control circuit is optimized for low ESR output capacitors
such as POSCAP, SP-CAP or ceramic types and features fast transient response with no external
compensation. The switching frequency is internally set at a nominal 700 kHz. The high-side and low-side
switching MOSFETs are incorporated inside the TPS54426 package along with the gate drive circuitry.
The low drain-to-source on resistance of the MOSFETs allow the TPS54426 to achieve high efficiencies
and helps keep the junction temperature low at high output currents. The TPS54426 also has an auto-skip
Eco-mode™ to enable higher efficiency at light loads. The TPS54426 dc/dc synchronous converter is
designed to provide up to a 4-A output from an input voltage source of 4.5V to 18V. The output voltage
range is from 0.76V to 5.5V.voltage and output current range for the evaluation module are given in
low external component count. The D-CAP2™ control circuit is optimized for low ESR output capacitors
such as POSCAP, SP-CAP or ceramic types and features fast transient response with no external
compensation. The switching frequency is internally set at a nominal 700 kHz. The high-side and low-side
switching MOSFETs are incorporated inside the TPS54426 package along with the gate drive circuitry.
The low drain-to-source on resistance of the MOSFETs allow the TPS54426 to achieve high efficiencies
and helps keep the junction temperature low at high output currents. The TPS54426 also has an auto-skip
Eco-mode™ to enable higher efficiency at light loads. The TPS54426 dc/dc synchronous converter is
designed to provide up to a 4-A output from an input voltage source of 4.5V to 18V. The output voltage
range is from 0.76V to 5.5V.voltage and output current range for the evaluation module are given in
.
Table 1. Input Voltage and Output Current Summary
EVM
Input Voltage Range
Output Voltage and Current Range
TPS54426EVM-608
VIN = 4.5V to 18V
VOUT = 1.05 V, 0A to 4A
1.2
Performance Specification Summary
A summary of the TPS54426EVM-608 performance specifications is provided in
. Specifications
are given for an input voltage of VIN = 12V and an output voltage of 1.05V, unless otherwise noted. The
ambient temperature is 25°C for all measurement, unless otherwise noted.
ambient temperature is 25°C for all measurement, unless otherwise noted.
Table 2. TPS54426 EVM and Performance Specifications Summary
Specifications
Test Conditions
Min
Typ
Max
Unit
Input voltage range (VIN)
4.5
12
18
V
Output voltage
1.05
V
Operating frequency
VIN = 12V, I
O
= 1 A
675
kHz
CH1
Output current range
0
4
A
Over current limit
VIN = 12V, L
O
= 1.5 µH
5.4
A
Output ripple voltage
VIN = 12V, I
O
= 4 A
7
mV
PP
2
TPS54426EVM-608 4-A, SWIFT™ Regulator Evaluation Module
SLVU381 – August 2010
Copyright © 2010, Texas Instruments Incorporated