TPS84259EVM-001: -3.3 ~ -15V @ 2A, 4.5 ~ 40V in


The TPS84259EVM-001 evaluation module is designed as an easy-to-use platform that facilitates an extensive evaluation of the features and performance of the Integrated Power Solution (IPS) device. The guide provides information on the correct usage of the EVM and an explanation of the numerous test points on the board.

The EVM features a TPS84259 device configured for operation from a 4.5 V to 40 V input supply. The TPS84259 is a non-synchronous, buck-boost (negative output) converter optimized for output voltages between -3 V and -17 V. The TPS84259 operates at a fixed frequency of typically 800 kHz. The output voltage can be set to one of four popular values by using a simple configuration jumper.

The EVM can supply up to 2 A of output current depending on the input and output voltage. A minimal amount of input and output capacitance is used on the board. Component pads are provided for additional input and output capacitors if desired. Test points are provided that allow measurement of efficiency, power dissipation, input ripple, output ripple, line and load regulation, soft-start behavior, transient response, and UVLO behavior. The EVM uses a recommended PCB layout that maximizes thermal performance and minimizes output ripple and noise.


Manufacturer Texas Instruments
Category AC/DC and DC/DC Conversion
Sub-Category DC/DC SMPS - Single Output
Eval Board -
Topology Inverting
Outputs and Type 1 Non-Isolated
Output Voltage: Factory Set -3.3 V
-5 V
-12 V
-15 V
Current Out 2 A
Voltage In 4.5 ~ 40 V
Efficiency @ Conditions >82%, 5 Vin, -12 V @ 0.04 ~ 0.3 A
>80%, 5 Vin, -5 V @ 0.04 ~ 0.5 A
>80%, 5 Vin, -15 V @ 0.05 ~ 0.2 A
>75%, 5V in, -3.3 V @ 30 ~ 750 mA
Voltage Out Range -3 ~ -17 V
Features Current Limit (Adj. or Fixed)
Internal Inductor
Over Current Protection
Shutdown, Enable, Standby
Soft Start
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 800 kHz
Standby Current [Typical] - Not Given
Quiescent Current [Typical] - Not Given
Component Count + Extras 19 + 27
Internal Switch Yes
Design Author Texas Instruments
Application / Target Market Auxiliary Power Supply
Industrial Power
Motor Control
Powered Speakers
Standby Current [Maximum] - Not Given
Quiescent Current [Maximum] - Not Given
Main I.C. Base Part TPS84259

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