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1 Introduction

This user's guide contains background information for the TPS54233 as well as support documentation for 
the TPS54233EVM-373 evaluation module (HPA373). Also included are the performance specifications, the 
schematic, and the bill of materials for the TPS54233EVM-373.

1.1 Background

The TPS54233 dc/dc converter is designed to provide up to a 2 A output from an input voltage source of 3.5 
V to 28 V. Rated input voltage and output current range for the evaluation module are given in 

Table 1-1

This evaluation module is designed to demonstrate the small printed-circuit-board areas that may be achieved 
when designing with the TPS54233 regulator. The switching frequency is internally set at a nominal 300 kHz. 
The high-side MOSFET is incorporated inside the TPS54233 package along with the gate drive circuitry. The 
low drain-to-source on resistance of the MOSFET allows the TPS54233 to achieve high efficiencies and helps 
keep the junction temperature low at high output currents. The compensation components are external to the 
integrated circuit (IC), and an external divider allows for an adjustable output voltage. Additionally, the TPS54233 
provides adjustable slow start and undervoltage lockout inputs. The absolute maximum input voltage is 30 V for 
the TPS54233EVM-373.

Table 1-1. Input Voltage and Output Current Summary

EVM

INPUT VOLTAGE RANGE

OUTPUT CURRENT RANGE

TPS54233EVM-373

VIN = 8 V to 18 V

0 A to 2 A

1.2 Performance Specification Summary

A summary of the TPS54233EVM-373 performance specifications is provided in 

Table 1-2

. Specifications are 

given for an input voltage of V

IN

 = 15 V and an output voltage of 3.3 V, unless otherwise specified. The 

TPS54233EVM-373 is designed and tested for V

IN

 = 7 V to 28 V. The ambient temperature is 25°C for all 

measurements, unless otherwise noted.

Table 1-2. TPS54233EVM-373 and Performance Specification Summary

SPECIFICATION

TEST CONDITIONS

MIN

TYP

MAX

UNIT

V

IN

 voltage range

7

15

18

V

Output voltage set point

3.3

V

Output current range

V

IN

 = 8 V to 18 V

0

2

A

Line regulation

I

O

 = 1 A, V

IN

 = 8V to 18 V

±0.025%

Load regulation

V

IN

 = 15 V, I

O

 = 0 A to 2 A

±0.03%

Load transient response

I

O

 = 0.5 A to 1.5 A

Voltage change

–20

mV

Recovery time

400

μs

I

O

 = 1.5 A to 0.5 A

Voltage change

20

mV

Recovery time

400

μs

Loop bandwidth

V

IN

 = 15 V, I

O

 = 1 A

9.0

kHz

Phase margin

V

IN

 = 15 V , I

O

 = 1 A

70

°

Input ripple voltage

I

O

 = 2 A

250

mVpp

Output ripple voltage

I

O

 = 2 A

70

mVpp

Output rise time

3.5

ms

Operating frequency

300

kHz

Maximum efficiency

TPS54233EVM-373, V

IN

 = 8 V, I

O

 = 0.4 A

91.2%

Introduction

www.ti.com

2

TPS54233 Step-Down Converter Evaluation Module User's Guide

SLVU264A – NOVEMBER 2008 – REVISED OCTOBER 2021

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Copyright © 2021 Texas Instruments Incorporated

Summary of Contents for TPS54233

Page 1: ...onse 6 Figure 2 6 TPS54233EVM 373 Loop Response 7 Figure 2 7 TPS54233EVM 373 Output Ripple 7 Figure 2 8 TPS54233EVM 373 Input Ripple 8 Figure 2 9 TPS54233EVM 373 Start Up Relative to VIN 8 Figure 2 10...

Page 2: ...is 30 V for the TPS54233EVM 373 Table 1 1 Input Voltage and Output Current Summary EVM INPUT VOLTAGE RANGE OUTPUT CURRENT RANGE TPS54233EVM 373 VIN 8 V to 18 V 0 A to 2 A 1 2 Performance Specification...

Page 3: ...ection describes how to properly connect set up and use the TPS54233EVM 373 evaluation module The section also includes test results typical for the evaluation module and covers efficiency output volt...

Page 4: ...f this EVM peaks at a load current of about 0 5 A 1 A and then decreases as the load current increases towards full load Figure 2 1 shows the efficiency for the TPS54233EVM 373 at an ambient temperatu...

Page 5: ...Load Regulation The load regulation for the TPS54233EVM 373 is shown in Figure 2 3 0 04 0 03 0 02 0 01 0 0 01 0 02 0 03 0 04 0 05 0 0 2 0 4 0 6 0 8 1 1 2 1 4 1 6 1 8 2 V 15 V IN V 18 V IN V 8 V IN Ou...

Page 6: ...ransients The TPS54233EVM 373 response to load transients is shown in Figure 2 5 The current step is from 25 to 75 of maximum rated load Total peak to peak voltage variation is as shown including ripp...

Page 7: ...op Response 2 7 Output Voltage Ripple The TPS54233EVM 373 output voltage ripple is shown in Figure 2 7 The output current is the rated full load of 2 A Voltage is measured directly across the output c...

Page 8: ...ly applied and the output is inhibited by using a jumper at J2 to tie EN to GND When the jumper is removed EN is released When the EN voltage reaches the enable threshold voltage of 1 25 V the start u...

Page 9: ...VOUT PH Figure 2 11 TPS54233EVM 373 Eco Mode Operation www ti com Test Setup and Results SLVU264A NOVEMBER 2008 REVISED OCTOBER 2021 Submit Document Feedback TPS54233 Step Down Converter Evaluation Mo...

Page 10: ...d around the board including ten vias directly under the TPS54233 device to provide a thermal path from the top side ground plane to the bottom side ground plane The input decoupling capacitors C1 C2...

Page 11: ...circuit board area for the components used in the design of this circuit is 0 72 in2 This area does not include test points or connectors www ti com Board Layout SLVU264A NOVEMBER 2008 REVISED OCTOBER...

Page 12: ...matic Figure 4 1 is the schematic for the TPS54233EVM 373 Figure 4 1 TPS54233EVM 373 Schematic Schematic and Bill of Materials www ti com 12 TPS54233 Step Down Converter Evaluation Module User s Guide...

Page 13: ...0603 Std Std 0 R7 Open Resistor Chip 1 16W 1 0603 Std Std 3 TP1 TP3 TP5 5000 Test Point Red Thru Hole Color Keyed 0 100 0 100 inch 5000 Keystone 3 TP2 TP4 TP6 5001 Test Point Black Thru Hole Color Key...

Page 14: ...ther than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control tec...

Page 15: ...These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not in...

Page 16: ...instructions set forth by Radio Law of Japan which includes but is not limited to the instructions below with respect to EVMs which for the avoidance of doubt are stated strictly for convenience and s...

Page 17: ...any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electr...

Page 18: ...R DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthe...

Page 19: ...change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of thes...

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