Product details

Vin (Min) (V) 2.7 Vin (Max) (V) 10 Vout (Min) (V) 0.8 Vout (Max) (V) 10 Iout (Max) (A) 5 Iq (Typ) (uA) 260 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 2000 Features Enable, Light Load Efficiency Regulated outputs (#) 1 Number of phases 1 Rating Catalog
Vin (Min) (V) 2.7 Vin (Max) (V) 10 Vout (Min) (V) 0.8 Vout (Max) (V) 10 Iout (Max) (A) 5 Iq (Typ) (uA) 260 Switching frequency (Min) (kHz) 100 Switching frequency (Max) (kHz) 2000 Features Enable, Light Load Efficiency Regulated outputs (#) 1 Number of phases 1 Rating Catalog
SOT-23 (DBV) 5 5 mm² 2.9 x 1.6
  • Easy-to-Use Control Methodology
  • 0.8 V to VIN Adjustable Output Range
  • High Efficiency (90% Typical)
  • ±0.9% (±1.5% Over Temperature) Feedback
    Voltage
  • 100% Duty Cycle Capable
  • Maximum Operating Frequency up to 2 MHz
  • Internal Soft-Start
  • Enable Pin
  • Easy-to-Use Control Methodology
  • 0.8 V to VIN Adjustable Output Range
  • High Efficiency (90% Typical)
  • ±0.9% (±1.5% Over Temperature) Feedback
    Voltage
  • 100% Duty Cycle Capable
  • Maximum Operating Frequency up to 2 MHz
  • Internal Soft-Start
  • Enable Pin

The LM3475 is a hysteretic P-FET buck controller designed to support a wide range of high efficiency applications in a very small SOT-23-5 package. The hysteretic control scheme has several advantages, including simple system design with no external compensation, stable operation with a wide range of components, and extremely fast transient response. Hysteretic control also provides high efficiency operation, even at light loads. The PFET architecture allows for low component count as well as 100% duty cycle and ultra-low dropout operation.

The LM3475 is a hysteretic P-FET buck controller designed to support a wide range of high efficiency applications in a very small SOT-23-5 package. The hysteretic control scheme has several advantages, including simple system design with no external compensation, stable operation with a wide range of components, and extremely fast transient response. Hysteretic control also provides high efficiency operation, even at light loads. The PFET architecture allows for low component count as well as 100% duty cycle and ultra-low dropout operation.

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Technical documentation

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Type Title Date
* Data sheet LM3475 Hysteretic PFET Buck Controller datasheet (Rev. C) PDF | HTML 31 Oct 2015
User guide LM3475 Buck Controller Evaluation Module User's Guide (Rev. B) PDF | HTML 09 Feb 2022
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Selection guide Control-Mode Quick Reference Guide (Rev. A) 14 Sep 2017
User guide PMLK Buck Experiment Book (Rev. B) 21 Apr 2017
User guide Power-Management-Laborkit Buck- Experimentierbuch (Rev. B) 21 Apr 2017
User guide Cost Effective Test Methods Using PMLK BUCK Boards (Rev. A) 31 Aug 2016
User guide PMLK Buck Experiment Book (Rev. A) 31 Aug 2016

Design & development

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

Evaluation board

LM3475EVAL — Hysteretic PFET Buck Controller

The LM3475 evaluation board is provided as a tool for developing DC/DC converters based on the LM3475 IC. As shown in Figure 1, the evaluation board is configured to provide an output of 2.5V at up to 2A from an input up to 10V. The corresponding bill of material is given in Table 1. Typical (...)

User guide: PDF | HTML
Not available on TI.com
Evaluation board

PMLKBUCKEVM — TI-PMLK Buck Experiment Board using TPS54160 & LM3475

The TI-PMLK Buck Experiment Board is part of the TI Power Management Lab Kit (TI-PMLK) series. TI-PMLK series provides hands on learning to reinforce power supply knowledge. The modular format allows users to customize the TI-PMLK series experience in a way that makes the most impact on (...)

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

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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SOT-23 (DBV) 5 View options

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