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LMR36506-Q1

ACTIVE

3-V to 65-V, 0.6-A buck converter optimized for size and light load efficiency

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Product details

Parameters

Vin (Min) (V) 3 Vin (Max) (V) 65 Vout (Min) (V) 1 Vout (Max) (V) 28 Iout (Max) (A) 0.6 Iq (Typ) (mA) 0.004 Iq (Typ) (uA) 4 Switching frequency (Min) (kHz) 200 Switching frequency (Max) (kHz) 2200 Features Enable, Forced PWM, Frequency Synchronization, Light Load Efficiency, Power Good, Spread Spectrum, Synchronous Rectification, Wettable Flanks Package Operating temperature range (C) -40 to 150 Rating Automotive Regulated outputs (#) 1 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, TA
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • >80% efficiency at 1 mA
    • 4 µA Iq (switching) at 24 VIN to 3.3 VOUT (fixed output option)
  • Miniature solution size and low component cost
    • 2-mm × 2-mm HotRod™ package with wettable flanks
    • Internal compensation
  • Designed for automotive applications:
    • Junction temperature range –40°C to +150°C
    • Pseudo-random spread spectrum compatible with CISPR 25 EMI standard
    • Wide input voltage range: 3.0 V (falling threshold) to 65 V
    • Adjustable, 3.3-V and 5-V fixed output voltage options available
    • Synchronizable with MODE/SYNC pin variant
    • Adjustable FSW: 200 kHz to 2.2 MHz with RT pin variant
    • Pin compatible with LMR36503-Q1 (65 V, 300 mA)

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Description

The LMR36506-Q1 is the industry’s smallest 65 V, 0.6 A synchronous step-down DC/DC converter in 2-mm x 2-mm HotRod™ package. This easy-to-use converter can handle input voltage transients up to 70 V, provide excellent EMI performance and support fixed 3.3 V, 5 V and other adjustable output voltages.

The LMR36506-Q1 uses peak current mode control architecture with internal compensation and maintains stable operation with minimal output capacitance. The wide input operating range of the LMR36506-Q1 helps it remain functional during a deep input voltage sag condition, making it an excellent choice for automotive applications withstanding severe cold crank start impulses. The PGOOD flag in the LMR36506-Q1 provides precise indication of the output voltage status, eliminating the requirement for an external supervisor. A seamless transition from FPWM to PFM, with an ultra-low standby quiescent current allows the LMR36506-Q1 to support much higher system efficiency at low output loads. The MODE/SYNC pin variant helps to synchronize the LMR36506-Q1 to an external clock. With the right resistor selection, the LMR36506-Q1 RT pin variant can also be externally programmed to any desired switching frequency of operation. The rich feature set of the LMR36506-Q1 is designed to simplify implementation for a wide range of automotive end equipments.

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NEW LMR36503-Q1 ACTIVE Automotive 3-V to 65-V, 0.3-A buck converter optimized for size and light load efficiency Pin-to-pin 300-mA version

Technical documentation

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Type Title Date
* Datasheet LMR36506-Q1 3-V to 65-V, 0.6-A Synchronous Buck Converter Optimized for Size and Light Load Efficiency datasheet (Rev. C) Jun. 19, 2020
User guides LMR36506MSCEVM User’s Guide (Rev. A) May 19, 2020
Selection guides Buck Converter Quick Reference Guide (Rev. A) Mar. 31, 2020
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019

Design & development

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Hardware development

EVALUATION BOARDS Download
document-generic User guide
49
Description

The LMR36506MSCEVM evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LMR36506-Q1 synchronous step-down converter. The LMR36503-Q1 can also be evaluated with LMR36506MSCEVM.

Features
  • Low minimum on-time
  • Integrated synchronous rectification
  • Low operating quiescent current
  • High efficiency at light loads

Design tools & simulation

SIMULATION MODELS Download
SNVMBT6.ZIP (182 KB) - PSpice Model
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SNVMBW3.ZIP (180 KB) - PSpice Model
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SNVMBW4.ZIP (166 KB) - PSpice Model
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SNVMBW7.ZIP (174 KB) - PSpice Model
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SNVMBX6.ZIP (152 KB) - PSpice Model
SIMULATION TOOLS Download
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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
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