PWM output voltage scaling reference design for enterprise systems
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Key Document


This reference design shows a buck converter with adjustable output voltage using the TLV62569. The voltage can be adjusted with a PWM signal scaling an output voltage from 2.5 V through 4.3 V. The output voltage adjustment is achieved with a PWM signal in this reference design at a frequency of 20 kHz and a maximum clocking frequency of 10 MHz.

  • Small form factor
  • PWM output voltage adjustment
  • Efficiency > 90%
  • Switching frequency of 1.5 MHz

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(Output Voltage 1)
(Output Voltage 2)
Vin (Min) (V)55
Vin (Max) (V)55
Vout (Nom) (V)2.54.3
Iout (Max) (A)1.51.5
Output Power (W)3.756.45
Input TypeDCDC
TopologyBuck- SynchronousBuck- Synchronous

TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
SN74LV1T04  Single Power Supply INVERTER Gate logic level shifter  Voltage level translators  Sample & Buy View Design Kits & Evaluation Modules
TL431LI  Adjustable precision shunt regulator with optimized reference current (pin layout: KRA)  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
TLV62569  2.5V-5.5V input, 2-A high efficiency step-down buck converter in SOT23 and SOT563 package  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
SN74LV1T04 Download Download
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TL431LI Download Download
TLV62569 Download Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 3187 23 May 2019
Design files (6)
Title Type Size (KB) Date
ZIP 1465 23 May 2019
ZIP 494 23 May 2019
PDF 287 23 May 2019
PDF 75 23 May 2019
PDF 284 23 May 2019
PDF 128 23 May 2019

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