Introduction
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1 Introduction
This user's guide contains background information for the TPS54334 as well as support documentation for
the TPS54334EVM-722 evaluation module (PWR722-001). Also included are the performance
specifications, the schematic, and the bill of materials for the TPS54334EVM-722.
1.1 Background
The TPS54334 dc/dc converter is designed to provide up to a 3-A output from an input voltage source of
4.2 V to 28 V. Rated input voltage and output current range for the evaluation module are given in
Table 1. This evaluation module is designed to demonstrate the small printed-circuit-board areas that may
be achieved when designing with the TPS54334 regulator. The switching frequency is externally set at a
nominal 570 kHz. The high-side and low-side MOSFETs are incorporated inside the TPS54334 package
along with the gate-drive circuitry. The low drain-to-source on resistance of the MOSFETs allow the
TPS54334 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 TPS54334 provides an adjustable undervoltage
lockout input. The absolute maximum input voltage is 30 V for the TPS54334EVM-722.
Table 1. Input Voltage and Output Current Summary
EVM INPUT VOLTAGE RANGE OUTPUT CURRENT RANGE
TPS54334EVM-722 VIN = 4.2 V to 28 V 0 A to 3 A
1.2 Performance Specification Summary
A summary of the TPS54334EVM-722 performance specifications is provided in Table 2. Specifications
are given for an input voltage of VIN = 24 V and an output voltage of 5.0 V, unless otherwise specified. The
TPS54334EVM-722 is designed and tested for VIN = 4.2 V to 28 V. The ambient temperature is 25°C for
all measurements, unless otherwise noted.
Table 2. TPS54334EVM-722 Performance Specification Summary
Specification Test Conditions MIN TYP MAX Unit
VIN operating voltage range 4.2 24 28 V
VIN start voltage 4.1 V
VIN stop voltage 3.9 V
Output voltage set point 3.3 V
Output current range(1) VIN = 4.2 V to 28 V 0 3 A
Line regulation IO= 1.5 A, VIN = 4.2 V to 28 V ±0.05%
Load regulation VIN = 12 V, IO= 0 A to 3 A ±0.2%
Voltage change –190 mV
IO= 0.75 A to 2.25 A Recovery time 150 μs
Load transient response Voltage change 190 mV
IO= 2.25 A to 0.75 A Recovery time 150 μs
Loop bandwidth VIN = 24 V, IO= 1.5 A 54.26 kHz
Phase margin VIN = 24 V , IO= 1.5 A 82 °
Input ripple voltage IO= 3 A 400 mVPP
Output ripple voltage IO= 3 A <30 mVPP
Output rise time 2 ms
Operating frequency 570 kHz
Maximum Efficiency TPS54334EVM-722, VIN = 12 V, IO= 1 A 91.38%
(1) When VIN = 4.2 V, maximum IOUT is 2 A.
2TPS54334EVM-722 3-A Regulator Evaluation Module SLVUAH4–August 2015
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