Texas Instruments TPS62842DGR, Руководство пользователя, Страница: 2 / 16

Introduction
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2 SLUUC58 – November 2019
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Copyright © 2019, Texas Instruments Incorporated
TPS62842EVM-103 User's Guide
1 Introduction
The TPS6284x is a family of synchronous, step-down converters in different packages. The
TPS62842EVM-103 contains the TPS62842DGR device in a DGR package. The DGR package is a
bigger package than DLC (SON) and YBG (WCSP) packages but it has better thermal performance.
1.1 Performance Specification
Table 1 provides a summary of the TPS62842EVM-103 performance specifications.
Table 1. Performance Specification Summary
SPECIFICATION MIN TYP MAX UNIT
Input voltage 1.8 3.6 6.5 V
Output voltage 3.3 V
Output current 0 750 mA
1.2 Modifications
The printed-circuit board (PCB) for this EVM uses the adjustable output voltage version of this integrated
circuit (IC). Additional input and output capacitors can also be added. Finally, the loop response of the IC
can be measured.
1.2.1 Adjusting the Output Voltage
The output voltage is adjusted though the choice of R11 and R14 resistors. Since R11 and R14 are in
parallel, only R11 or R14 should be installed at the same time. R11 and R14 are 0603 sizes to make it
easy to change the output voltage by replacing them. However, 0201 size resistors can also be used to
reduce the total solution size.
1.2.2 Input and Output Capacitors
C14 is provided for an additional input capacitor. This capacitor is not required for proper operation but
can be used to reduce the input voltage ripple.
C15, C16, and C17 are provided for additional output capacitors. These capacitors are not required for
proper operation but can be used to reduce the output voltage ripple and to improve the load transient
response. The total output capacitance must remain within the recommended range in the data sheet for
proper operation.