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LM5163H-Q1

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Automotive 6V-100-V input, 0.5-A synchronous high-temperature 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 Operating temperature range (C) -40 to 165 Rating Automotive 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

  • AEC-Q100-qualified for automotive applications
    • Device temperature grade 1: –40°C to +125°C, ambient temperature range
  • Designed for reliable and rugged applications
    • Wide input voltage range of 6 V to 100 V
    • Junction temperature range: –40°C to +165°C
    • Thermal shutdown that ensures 165°C
    • Peak and valley current-limit protection
    • Input UVLO and fixed 3-ms soft start
  • Optimized for ultra-low EMI requirements
    • Meets CISPR 25 class 5 standard
  • Suited for scalable automotive power supplies
    • 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
  • 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
  • Create a custom regulator design using WEBENCH® power designer

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Description

Coolants in powertrain systems can be expensive. There is an increase in ambient temperature requirements in powertrain applications as manufacturers reduce cost by decreasing the use of coolants in the system (water, air). In addition, power hungry systems in ADAS (camera modules) and powertrain often require high output power in small enclosures. These requirements drive the need for DC-DC converters to operate at high ambient temperatures resulting in the junction temperature to exceed 150°C. The LM5163H-Q1 synchronous buck converter is designed to function at elevated junction temperatures, up to 165°C, to enable high-density solutions that support high ambient temperature and output power specifications. The LM5163H-Q1 operates 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 LM5163H-Q1 operates during input voltage dips as low as 6 V, at nearly 100% duty cycle if needed, making it an excellent choice for high-performance 48-V battery automotive applications and MHEV/EV systems.

The LM5163H-Q1 is qualified to higher temperature profiles than required by automotive AEC-Q100 grade 1 and is available in a 8-pin SO PowerPAD™ package. Its 1.27-mm pin pitch provides adequate spacing for high-voltage applications.

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Technical documentation

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Type Title Date
* Datasheet LM5163H-Q1 100-V, 0.5-A, 10.5-µA IQ Buck Converter with 165°C Junction Temperature datasheet Nov. 12, 2019
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 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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