Product details

Vin (Min) (V) 3 Vin (Max) (V) 65 Vout (Min) (V) 1 Vout (Max) (V) 28 Iout (Max) (A) 0.6 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
Vin (Min) (V) 3 Vin (Max) (V) 65 Vout (Min) (V) 1 Vout (Max) (V) 28 Iout (Max) (A) 0.6 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
VQFN-HR (RPE) 9 4 mm² 2 x 2
  • 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)
  • 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)

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.

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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Technical documentation

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Type Title Date
* Data sheet LMR36506-Q1 3-V to 65-V, 0.6-A Synchronous Buck Converter Optimized for Size and Light Load Efficiency datasheet (Rev. C) PDF | HTML 19 Jun 2020
Selection guide Buck Converter Quick Reference Guide (Rev. B) 08 Apr 2021
Functional safety information LMR3650x-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 26 Oct 2020
EVM User's guide LMR36506MSCEVM User’s Guide (Rev. A) 19 May 2020
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019

Design & development

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

Evaluation board

LMR36506EVM — Automotive 3-V to 65-V, 0.6-A ultra-small synchronous buck converter evaluation module

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.

Not available on TI.com
Simulation model

LMR36506MSC-Q1 PSpice Unencrypted Transient Model (Rev. A)

SNVMBT6A.ZIP (179 KB) - PSpice Model
Simulation model

LMR36506MSC5-Q1 PSpice Unencrypted Transient Model

SNVMBW3.ZIP (180 KB) - PSpice Model
Simulation model

LMR36506R PSpice Unencrypted Transient Model

SNVMBW4.ZIP (166 KB) - PSpice Model
Simulation model

LMR36506MSC3-Q1 PSpice Unencrypted Transient Model

SNVMBW7.ZIP (174 KB) - PSpice Model
Simulation model

LMR36506RS3-Q1 PSpice Unencrypted Transient Model

SNVMBX6.ZIP (152 KB) - PSpice Model
Simulation model

LMR36506MSC-Q1 TINA-TI Buck Startup Transient Model

SNVMC46.TSC (1006 KB) - TINA-TI Spice Model
Simulation model

LMR36506MSC-Q1 TINA-TI Buck Steady State Transient Model

SNVMC47.TSC (1006 KB) - TINA-TI Spice Model
Simulation model

LMR36506MSC-Q1 TINA-TI IBB Startup Transient Model

SNVMC48.TSC (918 KB) - TINA-TI Spice Model
Simulation model

LMR36506MSC-Q1 TINA-TI IBB Steady State Transient Model

SNVMC49.TSC (1298 KB) - TINA-TI Spice Model
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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VQFN-HR (RPE) 9 View options

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