TPS5420

ACTIVE

5.5V to 36V Input, 2A, 500kHz Step-Down Converter

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LMR33620 ACTIVE SIMPLE SWITCHER® 3.8V to 36V, 2A Synchronous Buck Converter With Ultra-Low EMI Smaller footprint, higher efficiency, lower IQ and lower EMI.

Product details

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 5.5 Vin (max) (V) 36 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500 Features Enable, Over Current Protection Control mode Voltage mode Vout (min) (V) 1.23 Vout (max) (V) 31 Iq (typ) (µA) 3000 Duty cycle (max) (%) 87
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 2 Vin (min) (V) 5.5 Vin (max) (V) 36 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 500 Features Enable, Over Current Protection Control mode Voltage mode Vout (min) (V) 1.23 Vout (max) (V) 31 Iq (typ) (µA) 3000 Duty cycle (max) (%) 87
SOIC (D) 8 29.4 mm² 4.9 x 6
  • Wide Input Voltage Range: 5.5V to 36V
  • Up to 2A Continuous (3A Peak) Output Current
  • High Efficiency up to 95% Enabled by 110mΩ Integrated MOSFET Switch
  • Wide Output Voltage Range: Adjustable Down to 1.22V with 1.5% Initial Accuracy
  • Internal Compensation Minimizes External Parts Count
  • Fixed 500kHz Switching Frequency for Small Filter Size
  • Improved Line Regulation and Transient Response by Input Voltage Feed Forward
  • System Protected by Over Current Limiting, Over Voltage Protection and Thermal Shutdown
  • –40°C to 125°C Operating Junction Temperature Range
  • Available in Small 8-Pin SOIC Package
  • Wide Input Voltage Range: 5.5V to 36V
  • Up to 2A Continuous (3A Peak) Output Current
  • High Efficiency up to 95% Enabled by 110mΩ Integrated MOSFET Switch
  • Wide Output Voltage Range: Adjustable Down to 1.22V with 1.5% Initial Accuracy
  • Internal Compensation Minimizes External Parts Count
  • Fixed 500kHz Switching Frequency for Small Filter Size
  • Improved Line Regulation and Transient Response by Input Voltage Feed Forward
  • System Protected by Over Current Limiting, Over Voltage Protection and Thermal Shutdown
  • –40°C to 125°C Operating Junction Temperature Range
  • Available in Small 8-Pin SOIC Package

The TPS5420 is a high-output-current PWM converter that integrates a low resistance high side N-channel MOSFET. Included on the substrate with the listed features is a high performance voltage error amplifier that provides tight voltage regulation accuracy under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 5.5V; an internally set slow-start circuit to limit inrush currents; and a voltage feed-forward circuit to improve the transient response. Using the ENA pin, shutdown supply current is reduced to 18µA typically. Other features include an active-high enable, overcurrent limiting, overvoltage protection and thermal shutdown. To reduce design complexity and external component count, the TPS5420 feedback loop is internally compensated.

The TPS5420 device is available in an easy to use 8-pin SOIC package. TI provides evaluation modules and the Designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.

The TPS5420 is a high-output-current PWM converter that integrates a low resistance high side N-channel MOSFET. Included on the substrate with the listed features is a high performance voltage error amplifier that provides tight voltage regulation accuracy under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 5.5V; an internally set slow-start circuit to limit inrush currents; and a voltage feed-forward circuit to improve the transient response. Using the ENA pin, shutdown supply current is reduced to 18µA typically. Other features include an active-high enable, overcurrent limiting, overvoltage protection and thermal shutdown. To reduce design complexity and external component count, the TPS5420 feedback loop is internally compensated.

The TPS5420 device is available in an easy to use 8-pin SOIC package. TI provides evaluation modules and the Designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.

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Technical documentation

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Type Title Date
* Data sheet TPS5420 2A, Wide Input Range, Step-Down Converter datasheet (Rev. F) PDF | HTML 19 Jan 2024
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Analog Design Journal Power-supply design for high-speed ADCs (Rev. A) 18 May 2015
Application note Output Ripple Voltage for Buck Switching Regulator (Rev. A) 13 Oct 2014
More literature Журнал по применению аналоговых компонентов 1 кв. 2010 23 Sep 2010
Application note Using the TPS5430 As An Inverting Buck Boost Converter (Rev. A) 15 Aug 2007
Application note Using TPS5410/20/30/31/50 w/Aluminum/Ceramic Output Capacitors (Rev. C) 21 Mar 2007
EVM User's guide TPS5420EVM-175 User's Guide 05 Apr 2006

Design & development

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

Evaluation board

TPS5420EVM-175 — 10V to 36Vin, 2A Step Down Converter Evaluation Module

The TPS5420EVM-175 evaluation module allows the designer to evaluate the TPS5420 SWIFT DC/DC converter optimized for small size. The input voltage range of this module is 10 V to 36 V and the output voltage is pre-set to 5 V. The output voltage can be easily adjusted by changing a (...)

User guide: PDF
Not available on TI.com
Simulation model

TPS5420 PSpice Transient Model

SLVMAC0.ZIP (140 KB) - PSpice Model
Simulation model

TPS5420 TINA-TI Startup Reference Design

SLVMAM1.TSC (643 KB) - TINA-TI Reference Design
Simulation model

TPS5420 TINA-TI Steady State Reference Design

SLVMAM2.TSC (626 KB) - TINA-TI Reference Design
Simulation model

TPS5420 TINA-TI Transient Spice Model

SLVMAM0.ZIP (52 KB) - TINA-TI Spice Model
Simulation model

TPS5420 Unencrypted PSpice Transient Model

SLVMCU9.ZIP (6 KB) - PSpice Model
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This is a reference design for high-reliability, low-latency network communications for substation automation equipment in smart grid transmission and distribution networks. It supports the parallel redundancy protocol (PRP) specification in the IEC 62439 standard using the PRU-ICSS. This reference (...)
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Schematic: PDF
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SOIC (D) 8 Ultra Librarian

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