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1 Introduction
This user's guide contains background information for the TPS54061 as well as support documentation for
the TPS54061EVM-142 evaluation module (PWR142). Also included are the performance specifications,
the schematic, and the bill of materials for the TPS54061EVM-142.
1.1 Background
The TPS54061 dc/dc converter is designed to provide up to a 0.2A output from an input voltage source of
4.7V to 60V. 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 TPS54061 regulator. The switching frequency is externally set at a
nominal 400 kHz. The high-side and low-side MOSFETs are incorporated inside the TPS54061 package
along with the gate drive circuitry. The compensation components are external to the integrated circuit
(IC), and an external divider allows for an adjustable output voltage. Additionally, the TPS54061 provides
undervoltage lockout inputs. The absolute maximum input voltage is 60V for the TPS54061EVM-142.
Table 1. Input Voltage and Output Current Summary
EVM INPUT VOLTAGE RANGE OUTPUT CURRENT RANGE
TPS54061EVM-142 VIN = 8V to 60V 0 A to 0.2A
1.2 Performance Specification Summary
A summary of the TPS54061EVM-142 performance specifications is provided in Table 2. Specifications
are given for an input voltage of V
IN
= 24V and an output voltage of 3.3V, unless otherwise specified. The
TPS54061EVM-142 is designed and tested for V
IN
= 8V to 60V. The ambient temperature is 25°C for all
measurements, unless otherwise noted.
Table 2. TPS54061EVM-142 Performance Specification Summary
SPECIFICATION TEST CONDITIONS MIN TYP MAX UNIT
V
IN
voltage range 8 24 60 V
Output voltage set point 3.3 V
Output current range V
IN
= 8V to 60V 0 0.2 A
Line regulation I
O
= 0.2A, V
IN
= 8V to 60V ±0.2%
Load regulation V
IN
= 24V, I
O
= 0.001A to 0.2A ±0.1%
Load transient response I
O
= 0.05A to 0.15A Voltage change –75 mV
Recovery time 1 ms
I
O
= 0.15A to 0.05A Voltage change 75 mV
Recovery time 1 ms
Loop bandwidth V
IN
= 24V, I
O
= 0.2A 11 kHz
Phase margin V
IN
= 24V , I
O
= 0.2A 77 °
Input ripple voltage I
O
= 0.2A 50 mVpp
Output ripple voltage I
O
= 0.2A 6 mVpp
Output rise time 4 ms
Operating frequency 400 kHz
Maximum efficiency TPS54061EVM-142, V
IN
= 8V, I
O
= 0.07A 90.4%
DCM threshold V
IN
= 24V 35 mA
Skip threshold V
IN
= 24V 5.5 mA
No load input current V
IN
= 24V 260 µA
UVLO start threshold 7.5 V
UVLO stop threshold 6.5 V
2
Evaluation Module for TPS54061 Synchronous Step-Down SWIFT SLVU721–May 2012
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