4.5-V to 40-V, 2-A Negative output power module


Product details


Iout (Max) (A) 2 Vin (Min) (V) 4.5 Vin (Max) (V) 40 Soft start Fixed Features EMI Tested, Enable, Negative Output Operating temperature range (C) -40 to 85 Regulated outputs (#) 1 Topology Inverting Package type QFN open-in-new Find other Buck-boost & inverting modules (integrated inductor)

Package | Pins | Size

B1QFN (RKG) 41 99 mm² 11 x 9 open-in-new Find other Buck-boost & inverting modules (integrated inductor)


  • Complete Integrated Power Solution Allows
    Small Footprint, Low-Profile Design
  • Wide Input Voltage Range from 4.5 V to 40 V
  • Output Adjustable from  –3 V to –17 V
  • Supplies up to 2-A of Output Current
  • 45-V Surge Capability
  • Synchronizes to an External Clock
  • Adjustable Slow-Start
  • Programmable Undervoltage Lockout (UVLO)
  • Output Overcurrent Protection
  • Over Temperature Protection
  • Operating Temperature Range: –40°C to +85°C
  • Enhanced Thermal Performance: 14°C/W
  • Meets EN55022 Class B Emissions
    - Integrated Shielded Inductor
  • For Design Help visit http://www.ti.com/product/lmz34002
  • Create a Custom Design Using the LMZ34002 With the WEBENCH® Power Designer
open-in-new Find other Buck-boost & inverting modules (integrated inductor)


The LMZ34002 SIMPLE SWITCHER® power module is an easy-to-use, negative output voltage power module that combines a 15-W DC-DC converter with a shielded inductor, and passives into a low profile, QFN package. This total power solution allows as few as five external components and eliminates the loop compensation and magnetics part selection process.

The 9×11×2.8 mm QFN package is easy to solder onto a printed circuit board and allows a compact design with fewer components and excellent power dissipation capability. The LMZ34002 offers the flexibility and the feature-set of a discrete design and is ideal for powering a wide range of ICs and analog circuits requiring a negative output voltage. Advanced packaging technology affords a robust and reliable power solution compatible with standard QFN mounting and testing techniques.

open-in-new Find other Buck-boost & inverting modules (integrated inductor)
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Technical documentation

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Type Title Date
* Data sheet LMZ34002 15-W Negative Output Power Module With 4.5-V to 40-V Input datasheet (Rev. C) Apr. 11, 2018
Technical article Powering medical imaging applications with DC/DC buck converters Nov. 24, 2020
Application note Soldering Requirements for BQFN Packages (Rev. C) Mar. 05, 2020
White paper Simplify low EMI design with power modules Nov. 20, 2017
Application note Working With QFN Power Modules (Rev. A) Jun. 08, 2017
Selection guide TI Components for Aerospace and Defense Guide (Rev. E) Mar. 22, 2017
Application note Reducing Output Ripple and Noise using the LMZ34002 Sep. 10, 2013
User guide Using the LMZ34002 Jul. 02, 2013

Design & development

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Hardware development

document-generic User guide
The Texas Instruments LMZ34002EVM-001 evaluation module (EVM) makes it easy for designers to evaluate the performance of the LMZ34002 2A, Negative Output Power Module. The EVM operates with an input voltage range of 4.5V to 40V. The output voltage can be selected from four preset values using a (...)
  • Jumper selectable output voltage
  • Adjustable soft start
  • Adjustable turn-on UVLO

Design tools & simulation

SNVM573.ZIP (99 KB) - PSpice Model
SNVM977.ZIP (5 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

400-W Continuous, Scalable, ±2.5- to ±150-V, Programmable Ultrasound Power Supply Reference Design
TIDA-01352 — The TIDA-01352 enables modular and efficient power scaling capability by providing a solution for digitally programmable power supply for powering ultrasound transmit circuit. The design uses push-pull topology to generate high-voltage (HV) and low- (LV) or MID- voltage power supplies. The HV rails (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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B1QFN (RKG) 41 View options

Ordering & quality

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