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AC/DC & DC/DC converters (integrated FET)

LMR14030

現行

具 40-uA IQ 的 SIMPLE SWITCHER® 40-V、3.5-A、2.2-MHz 降壓轉換器

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LMR33630 現行 具有超低 EMI 的 SIMPLE SWITCHER® 3.8V 至 36V、3A 同步降壓轉換器 Smaller footprint, higher efficiency, lower IQ and lower EMI.

LMR14030

現行
產品規格表 立即訂購

產品詳細資料

Iout (max) (A) 3.5 Vin (min) (V) 4 Vin (max) (V) 40 Topology Buck Type Converter Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2500 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Tracking, UVLO adjustable Control mode current mode Vout (min) (V) 1 Vout (max) (V) 36 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.00004
Iout (max) (A) 3.5 Vin (min) (V) 4 Vin (max) (V) 40 Topology Buck Type Converter Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2500 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Adjustable, Tracking, UVLO adjustable Control mode current mode Vout (min) (V) 1 Vout (max) (V) 36 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.00004
HSOIC (DDA) 8 29.4 mm² 4.9 x 6
  • 4 V to 40 V Input Range
  • 3.5 A Continuous Output Current
  • Ultra-low 40 µA Operating Quiescent Current
  • 90 mΩ High-Side MOSFET
  • Minimum Switch-On Time: 75 ns
  • Current Mode Control
  • Adjustable Switching Frequency from 200 kHz to
    2.5 MHz
  • Frequency Synchronization to External Clock
  • Internal Compensation for Ease of Use
  • High Duty Cycle Operation Supported
  • Precision Enable Input
  • 1 µA Shutdown Current
  • External Soft-start
  • Thermal, Overvoltage and Short Protection
  • 8-Pin HSOIC with PowerPAD™ Package
  • 4 V to 40 V Input Range
  • 3.5 A Continuous Output Current
  • Ultra-low 40 µA Operating Quiescent Current
  • 90 mΩ High-Side MOSFET
  • Minimum Switch-On Time: 75 ns
  • Current Mode Control
  • Adjustable Switching Frequency from 200 kHz to
    2.5 MHz
  • Frequency Synchronization to External Clock
  • Internal Compensation for Ease of Use
  • High Duty Cycle Operation Supported
  • Precision Enable Input
  • 1 µA Shutdown Current
  • External Soft-start
  • Thermal, Overvoltage and Short Protection
  • 8-Pin HSOIC with PowerPAD™ Package

The LMR14030 is a 40 V, 3.5 A step down regulator with an integrated high-side MOSFET. With a wide input range from 4 V to 40 V, it’s suitable for various applications from industrial to automotive for power conditioning from unregulated sources. The regulator’s quiescent current is 40 µA in Sleep-mode, which is suitable for battery powered systems. An ultra-low 1 µA current in shutdown mode can further prolong battery life. A wide adjustable switching frequency range allows either efficiency or external component size to be optimized. Internal loop compensation means that the user is free from the tedious task of loop compensation design. This also minimizes the external components of the device. A precision enable input allows simplification of regulator control and system power sequencing. The device also has built-in protection features such as cycle-by-cycle current limit, thermal sensing and shutdown due to excessive power dissipation, and output overvoltage protection.

The LMR14030 is a 40 V, 3.5 A step down regulator with an integrated high-side MOSFET. With a wide input range from 4 V to 40 V, it’s suitable for various applications from industrial to automotive for power conditioning from unregulated sources. The regulator’s quiescent current is 40 µA in Sleep-mode, which is suitable for battery powered systems. An ultra-low 1 µA current in shutdown mode can further prolong battery life. A wide adjustable switching frequency range allows either efficiency or external component size to be optimized. Internal loop compensation means that the user is free from the tedious task of loop compensation design. This also minimizes the external components of the device. A precision enable input allows simplification of regulator control and system power sequencing. The device also has built-in protection features such as cycle-by-cycle current limit, thermal sensing and shutdown due to excessive power dissipation, and output overvoltage protection.
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LMR33640 現行 採用 SOIC-8 封裝的 SIMPLE SWITCHER® 3.8V 至 36V、4A 降壓轉換器 Next-generation 3.8-V to 36-V, 4-A step-down converter in SOIC-8 package.
LMR51430 現行 具 40-µA IQ 的 SIMPLE SWITCHER® 4.5-V 至 36-V、3-A 同步降壓轉換器 Lower Vin voltage, synchronous solution, SOT23-6 package for personal electronics and industrial applications

技術文件

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類型 標題 日期
* Data sheet LMR14030 SIMPLE SWITCHER® 40 V 3.5 A, 2.2 MHz Step-Down Converter with 40 µA IQ datasheet (Rev. A) PDF | HTML 2015年 4月 9日
Application note Simple Solution for EMI Filter Stability Issue in DC/DC Converters (Rev. A) 2019年 4月 25日
Application note How to Evaluate Junction Temperature Properly with Thermal Metrics (Rev. B) 2019年 3月 29日
Application note How SYNC Logic Affects EMI Performance for Dual-Channel Buck Converters 2018年 4月 27日
Application note Design Feedforward Capacitor for LMR14020 2017年 12月 20日
Application note How to Evaluate the Maximum Inductor in Internal Compensation PCM Buck Converter 2017年 9月 20日
Application note Extending Buck Regulator to Positive Buck-Boost Configuration 2017年 9月 2日
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013年 4月 23日
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013年 4月 23日
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005年 7月 12日
Application note AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3日

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

LMR14030SEVM — LMR14030S 降壓轉換器評估模組

The LMR14030SEVM is a fully assembled and tested circuit for evaluating the LMR14030S Step-Down Converter. The LMR14030SEVM operates from 7V to 36V input (12V nominal) and provides a 5.0V or 3.3V output at 3.5A. The board also has jumper connectors to enable or disable the converter operation, (...)

使用指南: PDF
TI.com 無法提供
開發板

TPS254900AQ1EVM — 具有 LMR14030 3.5A 降壓穩壓器的 TPS254900A-Q1 評估模組

The TPS254900AQ1 evaluation module (TPS254900AQ1EVM) contains evaluation and reference circuitry for the TPS254900AQ1, which is a USB charging controller and power switch, integrated VBUS and D+/D- short to battery protection, cable compensation, current monitor (IMON) and IEC ESD protection, which (...)
使用指南: PDF
TI.com 無法提供
開發板

TPS254900Q1EVM-817 — 具有 LMR14030 3.5A 降壓穩壓器的 TPS254900Q1 評估模組

The TPS254900-Q1 evaluation module (TPS254900Q1EVM-817) contains evaluation and reference circuitry for the TPS254900-Q1, which is a USB charging controller and power switch, integrated VBUS and D+/D- short to battery protection, cable compensation, current monitor (IMON) and IEC ESD protection, (...)
使用指南: PDF
TI.com 無法提供
模擬型號

LMR14030S PSPICE Transient Model

SNVM707.ZIP (61 KB) - PSpice Model
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模擬型號

LMR14030S PSpice Average Model

SNVMBD5.ZIP (72 KB) - PSpice Model
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模擬型號

LMR14030S Unencrypted PSpice Transient Model

SNVM922.ZIP (6 KB) - PSpice Model
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參考設計

PMP11594 — USB Type-C™ DFP 5V3A 充電器參考設計

The PMP11594 is a low cost 5V3A charger reference design which provides Type C DFP feature and is compliant with BC1.2 device.  The design includes a non-synchronous step-down regulator LMR14030 and highly integrated USB type-C controller TPS25810. The PMP11594 demonstrates high efficiency, (...)
Test report: PDF
電路圖: PDF
參考設計

TIDA-00845 — 具有電池短路保護的雙連接埠車用 USB 2.0 集線器參考設計

TIDA-00845 is a dual-port USB 2.0 hub with the ability to withstand a short of up to 18-V DC on both downstream ports, as well as Level 4 IEC 61000-4-2 ESD protection, overcurrent conditions, and shorts to ground. This protection is provided by an integrated protection device - the (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-03026 — 具有 LED 和音效回饋的狀態指示參考設計

The TIDA-03026 reference design functionality emulates status indication subsystems in various end equipments. By putting multiple LED drivers in parallel, an array of RGB LEDs can be synchronized to blink, pulse, and breathe - enhancing customer experience. Audio feedback is also integrated (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-00376 — 壓電式喇叭頻閃通知參考設計

TIDA-00376 uses our industrial piezo driver, flash LED driver and the ultra-low-power FRAM microcontroller (MCU) to demonstrate the implementation of both audible and visual notification subsystems primarily intended for fire alert end-equipment systems. This reference design demonstrates (...)
使用指南: PDF
電路圖: PDF
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