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DC/DC 轉換器

LMR36503-Q1

現行

針對尺寸和輕負載效率最佳化的汽車 3-V 至 65-V、0.3-A 降壓轉換器

立即訂購
產品規格表

LMR36503-Q1

現行
產品規格表 立即訂購

產品詳細資料

Rating Automotive Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 65 Vin (min) (V) 3 Vout (max) (V) 28 Vout (min) (V) 1 Features Enable, Fixed Output, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable flanks package EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000004 Duty cycle (max) (%) 99 TI functional safety category Functional Safety-Capable Sector Test & measurement
Rating Automotive Topology Buck Iout (max) (A) 0.3 Vin (max) (V) 65 Vin (min) (V) 3 Vout (max) (V) 28 Vout (min) (V) 1 Features Enable, Fixed Output, Forced PWM, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Spread Spectrum, Synchronous Rectification, Wettable flanks package EMI features Low parasitic Hotrod packaging, Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000004 Duty cycle (max) (%) 99 TI functional safety category Functional Safety-Capable Sector Test & measurement
VQFN-HR (RPE) 9 4 mm² (2 mm × 2 mm)
  • AEC-Q100-qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • >70% efficiency at 5 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 LMR36506-Q1 (65 V, 600 mA)
  • AEC-Q100-qualified for automotive applications:
    • Device temperature grade 1: –40°C to +125°C, TA
  • Functional Safety-Capable
  • >70% efficiency at 5 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 LMR36506-Q1 (65 V, 600 mA)

The LMR36503-Q1 is the industry’s smallest 65 V, 0.3 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 LMR36503-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 LMR36503-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 LMR36503-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 LMR36503-Q1 to support much higher system efficiency at low output loads. The MODE/SYNC pin variant helps to synchronize the LMR36503-Q1 to an external clock. With the right resistor selection, the LMR36503-Q1 RT pin variant can also be externally programmed to any desired switching frequency of operation. The rich feature set of the LMR36503-Q1 is designed to simplify implementation for a wide range of automotive end equipments.

The LMR36503-Q1 is the industry’s smallest 65 V, 0.3 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 LMR36503-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 LMR36503-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 LMR36503-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 LMR36503-Q1 to support much higher system efficiency at low output loads. The MODE/SYNC pin variant helps to synchronize the LMR36503-Q1 to an external clock. With the right resistor selection, the LMR36503-Q1 RT pin variant can also be externally programmed to any desired switching frequency of operation. The rich feature set of the LMR36503-Q1 is designed to simplify implementation for a wide range of automotive end equipments.
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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LMR36503-Q1 3-V to 65-V, 0.3-A Synchronous Buck Converter Optimized for Size and Light Load Efficiency datasheet (Rev. B) PDF | HTML 2020/9/22
白皮書 Design Considerations for 48V Automotive Body Motor Applications PDF | HTML 2026/2/17
選擇指南 Buck Converter Quick Reference Guide (Rev. B) 2021/4/8
功能安全資訊 LMR3650x-Q1 Functional Safety, FIT Rate, FMD and Pin FMA PDF | HTML 2020/10/26
技術文章 Optimizing flip-chip IC thermal performance in automotive designs PDF | HTML 2019/12/11

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LMR36503MSCEEVM — LMR360503E-Q1 評估模組 

LMR36503E-Q1 是採用同步整流的 65V DC/DC、0.3A 降壓穩壓器，可在小型元件封裝中實現高轉換效率。LMR36503E-Q1 評估模組 (EVM) 可在 5.5V 至 65V 的廣泛輸入電壓範圍內運作，以 2.2MHz 的切換頻率提供最高 0.3A 負載的穩壓 5V 輸出。LMR36503MSCEEVM 可在全負載時支援高於 1.5% 的輸出電壓穩壓準確度，並可使用外部電阻分壓器進行調整。

使用指南: PDF | HTML
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開發板

LMR36506EVM — 車用 3-V 至 65-V、0.6-A 超小型同步降壓轉換器評估模組

LMR36506MSCEVM 評估模組 (EVM) 是完全組裝且經過測試的電路，用於評估 LMR36506-Q1 同步降壓轉換器。也可使用 LMR36506MSCEVM 評估 LMR36503-Q1。

使用指南: PDF
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模擬型號

LMR36503MSC-Q1 PSpice Unencrypted Transient Model

SNVMC16.ZIP (528 KB) - PSpice 模型
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模擬型號

LMR36503MSC3-Q1 PSpice Unencrypted Transient Model

SNVMC17.ZIP (530 KB) - PSpice 模型
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模擬型號

LMR36503MSC5-Q1 PSpice Unencrypted Transient Model

SNVMC28.ZIP (524 KB) - PSpice 模型
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模擬型號

LMR36503RS3-Q1 PSpice Unencrypted Transient Model

SNVMC26.ZIP (517 KB) - PSpice 模型
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模擬型號

LMR36503RS5-Q1 PSpice Unencrypted Transient Model

SNVMC27.ZIP (538 KB) - PSpice 模型
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模擬型號

LMR36506R PSpice Unencrypted Transient Model

SNVMBW4.ZIP (166 KB) - PSpice 模型
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計算工具

LMR36503E-Q1-CALC — LMR36503, LMR36503-Q1, LMR36503E-Q1 converter quickstart tool

Welcome to the quickstart design tool for the LMR36503, LMR36503-Q1, and LMR36503E-Q1. This tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on the above converter family to meet application requirements.
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VQFN-HR (RPE) 9 Ultra Librarian
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