Texas Instruments TPS62442EVM-122, User Manual

Page: 2 / 13

1 Introduction
The TPS62442-Q1 device is a high-frequency, synchronous, dual step-down converter optimized for a small
solution size and high efficiency. The devices focus on high-efficiency, dual step-down conversion over a
wide output current range. The internal compensation circuit allows a compact solution and small external
components. The device is available in a 2.7-mm × 2.3-mm, including pins in a VQFN package.
1.1 Performance Specification
Table 1-1 provides a summary of the TPS62442EVM-122 performance specifications.
Table 1-1. Performance Specification Summary
SPECIFICATION TEST CONDITIONS MIN TYP MAX UNIT
Input voltage 2.7 6.0 V
Output voltage setpoint 1.8 /
1.8
V
Output current TPS62442EVM-122 0 2.0 /
2.0
A
1.2 Modifications
The printed-circuit board (PCB) for this EVM is designed to accommodate the different adjustable output voltage
versions of this integrated circuit (IC). On the EVM, additional input and output capacitors can be added and the
switching frequency can be modified.
1.2.1 Input and Output Capacitors
Footprints for an additional output capacitors (C15 to C20) are provided. These capacitors are not required for
proper operation but can be used to reduce output voltage ripple and to improve the load transient response.
For proper operation, the total output capacitance must remain within the recommended range described in the
TPS6244x-Q1 2.75-V to 6-V Dual Step-Down Converter with Adjustable Frequency in a QFN Package data
sheet .
1.2.2 Adjustable-Output IC U1 Operation
U1 is configured for evaluation of the adjustable-output version. This unit is set to 1.8 V for both outputs.
Resistors R1, R2 and R3, R4 can be used to set the output voltage between 0.6 V and 5.5 V. For recommended
values, see the
TPS6244x-Q1 2.75-V to 6-V Dual Step-Down Converter with Adjustable Frequency in a QFN
Package data sheet .
1.2.3 Feedforward Capacitor
C9 and C10 are the feedforward capacitors. For recommended values, see the TPS6244x-Q1 2.75-V to 6-V
Dual Step-Down Converter with Adjustable Frequency in a QFN Package data sheet .
1.2.4 Switching Frequency and Control Loop Compensation
R7 controls the switching frequency of the converter. It is also used to select a predefined control loop
compensation setting. For recommended values, see the
TPS6244x-Q1 2.75-V to 6-V Dual Step-Down
Converter with Adjustable Frequency in a QFN Package data sheet .
Introduction www.ti.com
2 TPS62442EVM-122 User's Guide SLVUC33 – NOVEMBER 2021
Submit Document Feedback
Copyright © 2021 Texas Instruments Incorporated