1 Introduction
The TPS56837 is an adaptive on-time D-CAP3™ control mode synchronous step-down DC/DC converter. With
the wide operating input voltage range of 4.5 V to 28 V, the TPS56837 is designed for systems powered from
12-V, 19-V, 24-V power-bus rails. The device supports up to 8-A continuous output current between 0.6 V
and 13 V. The TPS56837 device provides 500-kHz, 800-kHz and 1.2-MHz switching frequencies for selection.
This switch mode power supply (SMPS) IC is optimized for applications requiring very low power consumption,
such as printers, DTV, monitor and some industrial applications, by providing an Eco-mode™ (pulse-skipping).
D-CAP3 control mode provides an easy-to-design, stable regulation with very little external components, and
supports cost-effective ceramic capacitors. Table 1-1 shows the rated input voltage and output current ranges for
the evaluation module.
The TPS56837EVM evaluation module (EVM) is a single, synchronous buck converter providing 5-V at 8-A
output from 5.5-V to 28-V input. This user’s guide describes the TPS56837EVM performance.
Table 1-1. Input Voltage and Output Current Summary
EVM Input Voltage (VIN) RANGE OUTPUT CURRENT (IOUT) RANGE
TPS56837EVM 5.5 V to 28 V 0 A to 8 A
2 Performance Specification Summary
A summary of the TPS56837EVM performance specifications is provided in Table 2-1. Specifications are given
for an input voltage of VIN = 24 V and an output voltage of 5 V, unless otherwise noted. The ambient temperature
is 25°C for all measurement, unless otherwise noted.
Table 2-1. TPS56837EVM Performance Specifications Summary
SPECIFICATIONS TEST CONDITIONS MIN TYP MAX UNIT
Input voltage range (VIN) 5.5 24 28 V
Output voltage 5 V
Operating frequency VIN = 24 V, IOUT = 8 A 500 kHz
Output current range 0 8 A
Output ripple voltage VIN = 24 V, IOUT = 8 A 40 mVPP
Maximum efficiency VIN = 24 V, IOUT = 5 A 94.96 %
3 Modifications
These evaluation modules are designed to provide access to the features of the TPS56837. Some modifications
can be made to this module.
3.1 Output Voltage Setpoint
To change the output voltage of the EVMs, change the value of resistor R6 (RFB_TOP) and resistor R7 (RFB_BOT).
Changing the value of R6 and R7 can change the output voltage above 0.6 V. The value of R6 and R7 for a
specific output voltage can be calculated using Equation 1.
(1)
Table 3-1 lists the R6 and R7 values for some common output voltages.
Introduction www.ti.com
2TPS56837 Buck Converter Evaluation Module SLVUCE1A – MARCH 2023 – REVISED AUGUST 2023
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