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Product details

Parameters

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Features

  • 4.5 V to 42 V (45 V Abs Max) Input Range
  • 3.5 A Continuous Current, 4.5 A Minimum Peak Inductor Current Limit
  • Current Mode Control DC-DC Converter
  • 92-mΩ High-Side MOSFET
  • High Efficiency at Light Loads with Pulse Skipping Eco-mode™
  • Low Dropout at Light Loads with Integrated BOOT Recharge FET
  • 146 µA Operating Quiescent Current
  • 1 µA Shutdown Current
  • 100 kHz to 2.5 MHz Fixed Switching Frequency
  • Synchronizes to External Clock
  • Adjustable UVLO Voltage and Hysteresis
  • Internal Soft-Start
  • Accurate Cycle-by-Cycle Current Limit
  • Thermal, Overvoltage, and Frequency Foldback Protection
  • 0.8 V 1% Internal Voltage Reference
  • 8-Terminal HSOP with PowerPAD™ Package
  • –40°C to 150°C TJ Operating Range
  • Create a Custom Design with WEBENCH Tools

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Description

The TPS54340 is a 42 V, 3.5 A, step down regulator with an integrated high side MOSFET. The device survives load dump pulses up to 45 V per ISO 7637. Current mode control provides simple external compensation and flexible component selection. A low ripple pulse skip mode reduces the no load supply current to 146 µA. Shutdown supply current is reduced to 1 µA when the enable pin is pulled low.

Undervoltage lockout is internally set at 4.3 V but can be increased using the enable pin. The output voltage start up ramp is internally controlled to provide a controlled start up and eliminate overshoot.

A wide switching frequency range allows either efficiency or external component size to be optimized. Frequency foldback and thermal shutdown protects internal and external components during an overload condition.

The TPS54340 is available in an 8-terminal thermally enhanced HSOP PowerPAD™ package.

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Technical documentation

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$25.00
Description
The Texas Instruments TPS54340EVM-182 evaluation module (EVM) helps designers evaluate the performance of the TPS54340 Step-Down DC/DC Converter. The EVM operates from a 8V to 60V input (12V nominal) and provides a 5.0V output at 3.5A. The EVM demonstrates the small, printed-circuit-board (PCB (...)
Features
  • 8 V to 60 V Input Supply Voltage
  • Integrated 90-mΩ High Side N-Channel MOSFET
  • 146 µA Operating Quiescent Current
  • 1 µA Shutdown Current
  • 100 kHz to 2.5 MHz Switching Frequency
  • Adjustable UVLO Voltage and Hysteresis

Design tools & simulation

SIMULATION MODELS Download
SLVM694A.ZIP (111 KB) - PSpice Model
SIMULATION MODELS Download
SLVM984.TSC (498 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SLVM985.ZIP (54 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SLVMCT6.ZIP (5 KB) - PSpice Model
CALCULATION TOOLS Download
SLVC211E.ZIP (522 KB)
CALCULATION TOOLS Download
SLVC452E.ZIP (245 KB)
SCHEMATICS Download
SNVC107.PDF (82 KB)

Reference designs

REFERENCE DESIGNS Download
TPA3244 Dolby Atmos Soundbar Reference Design
TIDA-01414 — The TPA3244 Dolby Atmos® Soundbar Reference Design combines Ultra-HD audio and high dynamic range to create room filling audio experience from a small form factor system. The design leverages TI's high-performance TPA3244 amplifier, PCM5252 high-performance DAC with processing, and an integrated (...)
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REFERENCE DESIGNS Download
Dual Output Rail Power Supply with Inverting Buck Boost Converter Reference Design
PMP10090 PMP10090.1 shows a power supply, which provides a positive and a negative voltage rail in an inverting Buck Boost configuration. A 12V input is converted to 15V and -15V output voltages with 700mA load current each. 
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
5V@2.1A USB Charger Automotive Reference Design
PMP10282 This USB 3.0 charger provides 5V @ 2.1A over an automotive input range of 8V - 40V. It uses the integrated FET TPS54340 PWM Buck controller and implements cable voltage droop compensation. A TPS2546 charging port controller provides data line switching plus an integrated FET with dual current (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
USB-C DFP 5V3A Charger Reference Design
PMP4488 The PMP4488 is low cost 5V3A charger reference design providing Type C DFP feature and is compliant with BC1.2 device.  The design includes a non-synchronous step-down regulator TPS54340 and highly integrated USB type-C controller TPS25810. The PMP4488 demonstrates high efficiency, good (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive USB Battery Charging Reference Design
PMP8851 This USB battery charging reference design is optimized for size in order to fit within an automobile power accessory port. The design features a USB dedicated charging port controller with integrated current limiting power switch and a 42V DC/DC converter. High integration and small package sizing (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
12V input -12V1.5A output Buck-boost inverter
PMP4369 — PMP4369 converts 12V input voltage to negative 12V1.5A output with the high efficiency up to 90%@12Vin. Inverting Buck-Boost topology is adopted and echo mode step down converter TPS54340 is used in the design. The design limited in size within 33mmx33mm. The output ripple & noise is <50mV over (...)
REFERENCE DESIGNS Download
iPad® Automotive Charger Reference Design
TIDA-IPAD-AUTOMOTIVE-CHARGER-REFERENCE-DESIGN The reference design provides customers an extremely small form factor but still compliant to the iPad® charge current requirement of up to 2.1A at 5V. The switching buck, TPS54340, features switching frequency that is up to 2MHz which is above the audio band requirements. Customers can leverage (...)
document-generic Schematic document-generic User guide
Design files

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options

Ordering & quality

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