3.3-V, 1-A, Cost-Effective, Dual-Layer TO-220 LDO Replacement Reference Design With 93% Efficiency

(ACTIVE) TIDA-01449

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Key Document

Description

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.

Features
  • 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)

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Schematic/Block Diagram

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Design Guide

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Design Files

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Bill of Materials (BOM)

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Parametrics
 TIDA-01449.1
(Output Voltage 1)
Vin (Min) (V)6.5
Vin (Max) (V)17
Vout (Nom) (V)3.5
Iout (Max) (A)1
Output Power (W)3.5
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyBuck- Synchronous

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS561201  4.5V to 17V Input, 1A Synchronous Step-Down Voltage Regulator in 6-pin SOT-23  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS561201 Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 5262 16 Aug 2017 19
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 295 16 Aug 2017 26
ZIP 1137 16 Aug 2017 27
PDF 211 16 Aug 2017 27
PDF 46 16 Aug 2017 25
PDF 190 16 Aug 2017 40
PDF 75 16 Aug 2017 66
Related Tools & Software

Reference Designs  ( 3 )

Development Tools (1)

Name Part Number Tool Type
SPICE-Based Analog Simulation Program  TINA-TI  Circuit Design & Simulation 

Models (1)

Title Category Type Size (KB) Date Views
TIDA-01449 Simulation TINA-TI Reference Design ZIP 92 KB 25 May 2018 6 views

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