5-V, 1-A, Cost-Effective, Dual-Layer TO-220 LDO Replacement Reference Design With 92.5% Efficiency


Design files


This reference design demonstrates a small solution size, high-efficiency, and low-EMI DC/DC module for LDO replacement in major home appliances. Replacing LDOs with DC/DC modules drastically improves system efficiency, saving on solution size and BOM cost while also eliminating the need for heat sinks. The module takes up the same amount of space as a TO-220 package and is pin-to-pin compatible with the TO-220 LDO, such as UA7805, enabling quick evaluation and reduced time to market. The TPS561201 power converter enables a higher output current and lower power consumption at full-load, low-load, and standby operation. This module is the same size with a TO-220 package and is pin compatible with the TO-220 LDO, enabling a quick evaluation and time to market.

  • 1.1-μA standby current and 423-μA no load current
  • Small form factor: pin-compatible with TO-220 and size-compatible with TO-220
  • Less than 35°C increase at full load which eliminates the need of heat sink
  • Reduces onboard DC/DC design complexity, saves R&D time and efforts for switching power supply EMC design (quicker to market)
Output voltage options TIDA-01450.1
Vin (Min) (V) 6.5
Vin (Max) (V) 17
Vout (Nom) (V) 5
Iout (Max) (A) 1
Output Power (W) 5
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUD95.PDF (5169 K)

Reference design overview and verified performance test data

TIDRS98.PDF (75 K)

Detailed schematic diagram for design layout and components

TIDRS99.PDF (190 K)

Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement

TIDRSA2.ZIP (1092 K)

Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

TPS5612014.5V to 17V Input, 1A Synchronous Step-Down Voltage Regulator in 6-pin SOT-23

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide 5V, 1A, Cost-Effective, Dual-Layer TO-220 LDO Replacement Ref Design, 92.5% Eff Aug. 16, 2017
Technical article How to choose the right kind of DC/DC conversion for your appliance design Dec. 04, 2017

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Reference designs

TIDA-01447 3.3-V, 1-A, Cost-Effective, Single-Layer TO-247 LDO Replacement Reference Design With 91% Efficiency TIDA-01448 5-V, 1-A, Cost-Effective, Single-Layer TO-247 LDO Replacement Reference Design With 93% Efficiency TIDA-01449 3.3-V, 1-A, Cost-Effective, Dual-Layer TO-220 LDO Replacement Reference Design With 93% Efficiency

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