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LM5163

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100-V input, 0.5-A synchronous buck DC/DC converter with ultra-low IQ

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Product details

Parameters

Vin (Min) (V) 6 Vin (Max) (V) 100 Vout (Min) (V) 1.2 Vout (Max) (V) 90 Iout (Max) (A) 0.5 Iq (Typ) (mA) 0.0105 Iq (Typ) (uA) 10.5 Switching frequency (Min) (kHz) 75 Switching frequency (Max) (kHz) 1000 Features Enable, Light Load Efficiency, Over Current Protection, Power Good, Soft Start Fixed, Synchronous Rectification Operating temperature range (C) -40 to 150 Rating Catalog Regulated outputs (#) 1 open-in-new Find other Buck converters (integrated switch)

Package | Pins | Size

HSOIC (DDA) 8 19 mm² 4.9 x 3.9 open-in-new Find other Buck converters (integrated switch)

Features

  • Designed for reliable and rugged applications
    • Wide input voltage range of 6 V to 100 V
    • Junction temperature range: –40°C to +150°C
    • Fixed 3-ms internal soft-start timer
    • Peak and valley current-limit protection
    • Input UVLO and thermal shutdown protection
  • Suited for scalable Industrial power supplies and battery packs
    • Low minimum on- and off-times of 50 ns
    • Adjustable switching frequency up to 1 MHz
    • Diode emulation for high light-load efficiency
    • 10.5-µA no-load input quiescent current
    • 3-µA shutdown quiescent current
  • Ultra–low EMI emission
    • Optimized for CISPR 25 class 5 standard
  • Integration reduces solution size and cost
    • COT mode control architecture
    • Integrated 0.725-Ω NFET buck switch
    • Integrated 0.34-Ω NFET synchronous rectifier eliminates external Schottky diode
    • 1.2-V internal voltage reference
    • No loop compensation components
    • Internal VCC bias regulator and boot diode
    • Open-drain power good indicator
    • 8-Pin SOIC package with PowerPAD™
  • Create a custom regulator design using WEBENCH® power designer

All trademarks are the property of their respective owners.

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Description

The LM5163 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. A minimum controllable on-time of 50 ns facilitates large step-down conversion ratios, enabling the direct step-down from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5163 operates during input voltage dips as low as 6 V, at nearly 100% duty cycle if needed, making it an excellent choice for wide input supply range industrial and high cell count battery pack applications.

With integrated high-side and low-side power MOSFETs, the LM5163 delivers up to 0.5-A of output current. A constant on-time (COT) control architecture provides nearly constant switching frequency with excellent load and line transient response. Additional features of the LM5163 include ultra-low IQ and diode emulation mode operation for high light-load efficiency, innovative peak and valley overcurrent protection, integrated VCC bias supply and bootstrap diode, precision enable and input UVLO, and thermal shutdown protection with automatic recovery. An open-drain PGOOD indicator provides sequencing, fault reporting, and output voltage monitoring.

The LM5163 is available in a thermally-enhanced, 8-pin SO PowerPAD™ package. Its 1.27-mm pin pitch provides adequate spacing for high-voltage applications.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet LM5163 100-V Input, 0.5-A Synchronous Buck DC/DC Converter with Ultra-low IQ datasheet Jan. 28, 2019
Selection guides Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
Technical articles Fast and furious: designing longer-lasting 16S-17S Li-ion battery packs for e-motorcycles Nov. 21, 2019
User guides LM5164Q1-EVM User Guide (Rev. A) Apr. 04, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application notes Stability Analysis and Design of COT Type-3 Ripple Circuit Mar. 20, 2019
Technical articles Power to the pedal: Achieving longer-lasting 13S, 48-V lithium-ion battery packs for e-bikes and e-scooters Mar. 07, 2019
Application notes DC/DC Buck Converters With Ultra-Low IQ for Industrial Battery-Pack Applications Feb. 20, 2019
Application notes IC Package Features Lead to Higher Reliability in Automotive Systems Feb. 20, 2019
Application notes Powering Drones With a Wide VIN DC-DC Converter (Rev. A) Feb. 05, 2019

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
75
Description
The LM5164-Q1 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM5164-Q1, 300-kHz synchronous step-down converter.  The LM5164-Q1EVM operates at very low quiescent current and delivers exceptional efficiency with minimum number of external components.
Features
  • Inegrated Synchronous Rectification
  • Low Operating Quiescent Current
  • High Efficiency at Light Loads
  • Short Minimum On-time

Design tools & simulation

SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
CALCULATION TOOLS Download
LM5163 and LM5164 converter quickstart design tool
LM5163-LM5164DESIGN-CALC — Welcome to the LM5163 and LM5164 Quickstart Design Tool. This standalone tool facilitates and assists the power supply engineer with design of a DC/DC buck converter based on the LM5163 and LM5164 low IQ synchronous buck DC/DC regulator. As such, the user can expeditiously arrive at an optimized (...)
document-generic User guide
Features
  • Determine buck inductance and input and output capacitances
  • Optimize the design using efficiency and solution size as key performance metrics
  • Select components input UVLO, output voltage setpoint, FB ripple, and switching frequency
  • Inspect converter efficiency, solution size, component power (...)

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DDA) 8 View options

Ordering & quality

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