Texas Instruments TPS62806-7-8EVM083, User Manual

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Introduction
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2 SLUUC01 – January 2019
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Copyright © 2019, Texas Instruments Incorporated
TPS62806-7-8EVM083 Evaluation Module
1 Introduction
The TPS6280x is a family of synchronous, step-down converters in a 1.05- × 0.7-mm wafer chip-scale
package (WCSP) with 0.35-mm pitch. The BSR083 EVM contains 3 completely independent circuits, each
for a different IC version. See
Table 1 for a summary of the BSR083 EVMs.
The reference designator order is grouped together by sub-circuit. Reference designators beginning with
'1' (for example, R1x, J1x, C1x) are part of one sub-circuit. The second digit of each reference designator
is the same for the same component in different sub-circuits. R11, R21, and R31, for example, refer to the
same resistor in each sub-circuit.
Table 1. BSR083 Circuit Options
EVM Version IC Installed
Output Voltage Setpoint
(VSEL/MODE = open at
startup)
Output Voltage
Setpoint (VSEL/MODE
= PFM at startup)
Output Voltage
Setpoint Range
Output Current
TPS62806-7-8EVM083
(BSR083-001)
TPS62806 (U11) 0.6 V 0.7 V 0.4 - 0.775 V (adjustable) 600 mA
TPS62807 (U21) 0.9 V 1.2 V 0.8 - 1.55 V (adjustable) 600 mA
TPS62808 (U31) 3.3 V 1.8 V 1.8 - 3.3 V (adjustable) 600 mA
1.1 Performance Specification
Table 2 provides a summary of the TPS62806-7-8EVM083 performance specifications.
Table 2. Performance Specification Summary
SPECIFICATION MIN TYP MAX UNIT
Input voltage 1.8 3.6 5.5 V
Output voltage setpoint See Table 1 V
Output current 0 See Table 1 mA
1.2 Modifications
The printed-circuit board (PCB) for this EVM uses the adjustable output voltage versions 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 Rx1 and Rx2 resistors. Since Rx1 and Rx2 are in
parallel, only Rx1 or Rx2 should be installed at the same time. Rx1 is an 0201 size to represent a typical
final solution. However, such a small size is difficult to manually replace. Therefore, Rx2 is provided in an
0603 size to easily change the output voltage. Simply remove Rx1 and install Rx2 in the desired value.