LMZ34002EVM-001: -3 ~ -17V @ 2A, 4.5 ~ 40V in


The LMZ34002EVM-001 Evaluation Module is designed as an easy-to-use platform that facilitates an extensive evaluation of the features and performance of the Simple Switcher® power module. This 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 LMZ34002 device configured for operation from a 4.5 V to 40 V input supply. The LMZ34002 is a non-synchronous, buck-boost (negative output) converter optimized for output voltages between -3 V and -17 V. The LMZ34002 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 Part Number 296-37107-ND
Eval Board Supplier Texas Instruments
Eval Board Normally In Stock
Topology Inverting
Outputs and Type 1 Non-Isolated
Voltage Out: Factory Set -3.3 V
-5 V
-12 V
-15 V
Current Out 2 A
Voltage In 4.5 ~ 40 V
Efficiency @ Conditions >82%, 5V in, -15V @ 0.05 ~ 0.2 A
>82%, 5V in, -12V @ 0.05 ~ 0.3 A
>80%, 5V in, -5V @ 0.05 ~ 0.5 A
>80%, 36V in, -15V @ 0.25 ~ 1.4 A
>80%, 36V in, -12V @ 0.3 ~ 1.75 A
>75%, 5V in, -3.3V @ 30 ~ 70 mA
>75%, 36V in, -5V @ 0.1 ~ 2 A
>72%, 36V in, -3.3V @ 0.1 ~ 2 A
Voltage Out Range -3 ~ -17 V
Features Over Current Protection
Shutdown, Enable, Standby
Soft Start
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 700 ~ 900 MHz
Standby Current [Typical] 1.3 µA
Quiescent Current [Typical] - Not Given
Component Count + Extras 17 + 12
Internal Switch Yes
Design Author Texas Instruments
Application / Target Market Audio: Hi Fi
Home Theater
Motor Control
Power: Auxiliary Power Supply
Power: Industrial Power
Standby Current [Maximum] 4 µA
Quiescent Current [Maximum] - Not Given
Main I.C. Base Part LMZ34002
Date Created By Author 2013-07
Date Added To Library 2014-05

Eval Board

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