Texas Instruments Evaluation Module for TPS54228 TPS54228EVM-686 TPS54228EVM-686 Datenbogen
Produktcode
TPS54228EVM-686
Introduction
15
Bottom Layer
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16
Bottom Assembly
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17
TPS54228EVM-686 Schematic Diagram
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List of Tables
1
Input Voltage and Output Current Summary
............................................................................
2
TPS54228EVM-686 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
The TPS54228 is a single, adaptive on-time, D-CAP2
™
-mode, synchronous buck converter requiring a
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 TPS54228 package along with the gate drive circuitry.
The low drain-to-source on resistance of the MOSFETs allows the TPS54228 to achieve high efficiencies
and helps keep the junction temperature low at high-output currents. The TPS54228 also features
auto-skip Eco-mode
compensation. The switching frequency is internally set at a nominal 700 kHz. The high-side and low-side
switching MOSFETs are incorporated inside the TPS54228 package along with the gate drive circuitry.
The low drain-to-source on resistance of the MOSFETs allows the TPS54228 to achieve high efficiencies
and helps keep the junction temperature low at high-output currents. The TPS54228 also features
auto-skip Eco-mode
™
operation for improved light-load efficiency. The TPS54228 dc/dc synchronous
converter is designed to provide up to a 2-A output from an input voltage source of 4.5 V to 18 V. The
output voltage range is from 0.76 V to 7.0 V. Rated input voltage and output current range for the
evaluation module are given in
output voltage range is from 0.76 V to 7.0 V. Rated input voltage and output current range for the
evaluation module are given in
The TPS54228EVM-686 evaluation module is a single, synchronous buck converter providing 1.05 V at 2
A from 4.5-V to 18-V input. This user
A from 4.5-V to 18-V input. This user
’
s guide describes the TPS54228EVM-686 performance.
Table 1. Input Voltage and Output Current Summary
EVM
Input Voltage Range
Output Current Range
TPS54228EVM-686
V
IN
= 4.5 V to 18 V
0 A to 2 A
2
Performance Specification Summary
A summary of the TPS54228EVM-686 performance specifications is provided in
. Specifications
are given for an input voltage of V
IN
= 12 V and an output voltage of 1.05 V, unless otherwise noted. The
ambient temperature is 25
°
C for all measurement, unless otherwise noted.
Table 2. TPS54228EVM-686 Performance Specifications Summary
Specifications
Test Conditions
Min
Typ
Max
Unit
Input voltage range (V
IN
)
4.5
12
18
V
Output voltage
1.05
V
Operating frequency
V
IN
= 12 V, I
O
= 1 A
700
kHz
Output current range
0
2
A
+/-
%
Line regulation
I
O
= 1 A
0.22
+0.85/-
Load regulation
V
IN
= 12 V
%
0.02
Over current limit
V
IN
= 12 V, L
O
= 1.5
µ
H
2.5
3.3
4.7
A
Output ripple voltage
V
IN
= 12 V, I
O
= 3 A
15
mV
PP
Maximum efficiency
V
IN
= 5 V, I
O
= 0.3 A
85.1
%
2
TPS54228EVM-686, 2-A, SWIFT
™
Regulator Evaluation Module
SLVU452
–
May 2011
Copyright
©
2011, Texas Instruments Incorporated