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DC/DC 切換穩壓器
DC/DC 轉換器

LM5158

現行

具備雙隨機展頻的 3-A、85-V、2.2-MHz 大範圍 VIN 升壓返馳及 SEPIC 轉換器

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產品規格表

LM5158

現行
立即訂購

產品詳細資料

Rating Catalog Topology Boost, Flyback, SEPIC Vin (max) (V) 60 Vin (min) (V) 1.5 Vout (max) (V) 83 Vout (min) (V) 2 Switch current limit (typ) (A) 3.75 Features Enable, Frequency synchronization, Nonsynchronous rectification, Power good, Spread Spectrum, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.00067 Duty cycle (max) (%) 93
Rating Catalog Topology Boost, Flyback, SEPIC Vin (max) (V) 60 Vin (min) (V) 1.5 Vout (max) (V) 83 Vout (min) (V) 2 Switch current limit (typ) (A) 3.75 Features Enable, Frequency synchronization, Nonsynchronous rectification, Power good, Spread Spectrum, UVLO adjustable EMI features Frequency Dithering, Spread Spectrum Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.00067 Duty cycle (max) (%) 93
WQFN (RTE) 16 9 mm² (3 mm × 3 mm)
  • Suited for wide operating range for battery applications
    • 3.2-V to 60-V input operating range (65-V abs max)
    • 83-V maximum output (85-V abs max)
    • Minimum boost supply voltage of 1.5 V when BIAS ≥ 3.2 V
    • Input transient protection up to 65 V
    • Minimized battery drain
      • Low shutdown current (IQ ≤ 2.6 µA)
      • Low operating current (IQ ≤ 670 µA)
  • Small solution size and low cost
    • Maximum switching frequency up to 2.2 MHz
    • 16-pin QFN package (3 mm × 3 mm)
    • Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
    • Accurate current limit (see the Device Comparison Table)
  • EMI mitigation
    • Selectable dual random spread spectrum
    • Lead-less package
  • Higher efficiency with low-power dissipation
    • 133-mΩ RDSON switch
    • Fast switching, small switching loss
  • Avoid AM band interference and crosstalk
    • Optional clock synchronization
    • Dynamically programmable wide switching frequency from 100 kHz to 2.2 MHz
  • Integrated protection features
    • Constant current limiting over input voltage
    • Selectable hiccup mode overload protection
    • Programmable line UVLO
    • OVP protection
    • Thermal shutdown
  • Accurate ±1% accuracy feedback reference
  • Adjustable soft start
  • PGOOD indicator
  • Create a custom design using the LM5158x with the WEBENCH Power Designer
  • Suited for wide operating range for battery applications
    • 3.2-V to 60-V input operating range (65-V abs max)
    • 83-V maximum output (85-V abs max)
    • Minimum boost supply voltage of 1.5 V when BIAS ≥ 3.2 V
    • Input transient protection up to 65 V
    • Minimized battery drain
      • Low shutdown current (IQ ≤ 2.6 µA)
      • Low operating current (IQ ≤ 670 µA)
  • Small solution size and low cost
    • Maximum switching frequency up to 2.2 MHz
    • 16-pin QFN package (3 mm × 3 mm)
    • Integrated error amplifier allows primary-side regulation without optocoupler (flyback)
    • Accurate current limit (see the Device Comparison Table)
  • EMI mitigation
    • Selectable dual random spread spectrum
    • Lead-less package
  • Higher efficiency with low-power dissipation
    • 133-mΩ RDSON switch
    • Fast switching, small switching loss
  • Avoid AM band interference and crosstalk
    • Optional clock synchronization
    • Dynamically programmable wide switching frequency from 100 kHz to 2.2 MHz
  • Integrated protection features
    • Constant current limiting over input voltage
    • Selectable hiccup mode overload protection
    • Programmable line UVLO
    • OVP protection
    • Thermal shutdown
  • Accurate ±1% accuracy feedback reference
  • Adjustable soft start
  • PGOOD indicator
  • Create a custom design using the LM5158x with the WEBENCH Power Designer

The LM5158x device is a wide input range, non-synchronous boost converter with an integrated 85-V, 3.26-A (LM5158) or 85-V, 1.63-A (LM51581) power switch.

The device can be used in boost, SEPIC, and flyback topologies. It can start up from a single-cell battery with a minimum of 3.2 V. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.2 V.

The BIAS pin operates up to 60 V (65-V absolute maximum). The switching frequency is dynamically programmable from 100 kHz to 2.2 MHz with an external resistor. Switching at 2.2 MHz minimizes AM band interference and allows for a small solution size and fast transient response. The device provides a selectable Dual Random Spread Spectrum to help reduce the EMI over a wide frequency range.

The device features an accurate peak current limit over the input voltage, which avoids overdesigning the power inductor. Low operating current and pulse-skipping operation improve efficiency at light loads.

The device has built-in protection features such as overvoltage protection, line UVLO, thermal shutdown, and selectable hiccup mode overload protection. Additional features include low shutdown IQ, programmable soft start, precision reference, a power-good indicator, and external clock synchronization.

The LM5158x device is a wide input range, non-synchronous boost converter with an integrated 85-V, 3.26-A (LM5158) or 85-V, 1.63-A (LM51581) power switch.

The device can be used in boost, SEPIC, and flyback topologies. It can start up from a single-cell battery with a minimum of 3.2 V. It can operate with the input supply voltage as low as 1.5 V if the BIAS pin is greater than 3.2 V.

The BIAS pin operates up to 60 V (65-V absolute maximum). The switching frequency is dynamically programmable from 100 kHz to 2.2 MHz with an external resistor. Switching at 2.2 MHz minimizes AM band interference and allows for a small solution size and fast transient response. The device provides a selectable Dual Random Spread Spectrum to help reduce the EMI over a wide frequency range.

The device features an accurate peak current limit over the input voltage, which avoids overdesigning the power inductor. Low operating current and pulse-skipping operation improve efficiency at light loads.

The device has built-in protection features such as overvoltage protection, line UVLO, thermal shutdown, and selectable hiccup mode overload protection. Additional features include low shutdown IQ, programmable soft start, precision reference, a power-good indicator, and external clock synchronization.
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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 LM5158x 2.2-MHz Wide VIN 85-V Output Boost/SEPIC/Flyback Converter with Dual Random Spread Spectrum datasheet PDF | HTML 2021/10/20
Application brief Avoiding Pulse Skip Operation at Light Load Conditions for Asynchronous Boost Converter Designs PDF | HTML 2025/9/16
應用說明 Generate Negative Power Supply from Positive Power Supply PDF | HTML 2025/7/29
應用說明 How to Implement the Soft Start in a Flyback PDF | HTML 2023/7/10
應用說明 How to Design an Isolated Flyback Converter Using LM5157x/LM5158x (Rev. A) PDF | HTML 2023/3/16
應用說明 Basic Calculation of a Coupled Inductor SEPIC Power Stage PDF | HTML 2023/3/13
應用說明 How to Design a Boost Converter Using LM5157x, LM5158x PDF | HTML 2021/11/11
證書 LM5158EVM-FLY EU Declaration of Conformity (DoC) 2021/9/20
技術文章 Lowering audible noise in automotive applications with TI’s DRSS technology PDF | HTML 2021/3/18

設計與開發

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開發板

LM5157EVM-SEPIC — 適用於 SEPIC 的 LM5157 評估模組

LM5157EVM-SEPIC 評估模組展示了 LM5157 作為寬輸入非同步 SEPIC 轉換器的功能和性能。標準配置的設計可在 4 V 至 32 V 輸入，在 2.1 MHz 下切換時，在最高 1 A 時提供 12 V 的穩壓輸出。

使用指南: PDF | HTML
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開發板

LM5158EVM-BST — LM5158-Q1 升壓轉換器評估模組

LM5158EVM-BST 評估模組展示 LM5158 裝置的功能和性能，此裝置為具備雙隨機展頻的寬輸入電壓升壓轉換器。標準配置的設計可在 3 V 至 9 V 輸入 (輸入電壓 < 6 V 時，負載降低至 0.6 A)、2.1 MHz 切換頻率時，在 1.2 A 時提供 12 V 的穩壓輸出。
使用指南: PDF | HTML
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開發板

LM5158EVM-FLY — LM5158-Q1 返馳式轉換器評估模組

LM5158EVM-FLY 評估模組展示 LM5158 做為返馳式轉換器的功能和性能，可為三相逆變器閘極驅動器偏壓電源的典型應用產生多重輸出電壓軌。  標準配置的設計可在 8V 至 16V 輸入，在 250mA 時提供 10V 的穩壓輸出。另提供三組隔離式 20V 電壓軌，分別提供 75mA、75mA 及 150 mA 電流。   切換頻率為 250kHz。
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模擬型號

LM5158x-Q1 Unencrypted PSpice Boost Average (Rev. A)

SNVMC91A.ZIP (39 KB) - PSpice 模型
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模擬型號

LM5158x-Q1 Unencrypted PSpice Transient Model (Rev. B)

SNVMC90B.ZIP (163 KB) - PSpice 模型
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計算工具

SNVR508 — LM515x Quickstart Calculator for Flyback Regulator Design

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計算工具

SNVR511 — LM5157 and LM5158 Quickstart Calculator for Boost Regulator Design

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計算工具

SNVR512 — LM5157 and LM5158 Quickstart Calculator for SEPIC Regulator Design

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參考設計

TIDA-010269 — 手持式超音波成像裝置電源供應參考設計

此參考設計專為強化採用新一代發射器與接收器的新一代 128 通道超音波智慧探測器而打造。尺寸精巧 (80mm × 45mm × 20mm)，包含所有 128 通道智慧探測器的電源功能，且效率高於 80%。這款無變壓器高電壓電源供應器（25mA 時為 ±75V）是全新升壓穩壓器，可讓參考設計符合大多數智慧探測器應用。
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
WQFN (RTE) 16 Ultra Librarian
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