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DC/DC 切換穩壓器
DC/DC 轉換器

LM21215A

現行

具頻率同步的 2.95-5.5V、15A 電壓模式同步降壓穩壓器

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LM21215A

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 15 Vin (max) (V) 5.5 Vin (min) (V) 2.95 Vout (max) (V) 5.5 Vout (min) (V) 0.6 Switch current limit (typ) (A) 20 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0015 Duty cycle (max) (%) 100
Rating Catalog Topology Buck Iout (max) (A) 15 Vin (max) (V) 5.5 Vin (min) (V) 2.95 Vout (max) (V) 5.5 Vout (min) (V) 0.6 Switch current limit (typ) (A) 20 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode Voltage mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.0015 Duty cycle (max) (%) 100
HTSSOP (PWP) 20 41.6 mm² (6.5 mm × 6.4 mm)
  • High-Efficiency Synchronous DC/DC Converter
    • Input Voltage Range of 2.95 V to 5.5 V
    • Adjustable Output Voltage From 0.6 V to VIN
    • Output Current as High as 15 A
  • Frequency Synchronization 300 kHz to 1.5 MHz
  • Integrated 7-mΩ PMOS Buck Switch Supports 100% Duty Cycle for Low Dropout Voltage
  • Integrated 4.3-mΩ NMOS Synchronous Rectifier Eliminates Schottky Diode
  • Accurate ±1% Internal Voltage Reference
  • Automatic Diode Emulation Mode for Improved Efficiency at Light Loads
  • Monotonic Pre-Biased Startup
  • Internal 0.5-ms or Externally Adjustable Soft Start
  • Output Voltage Tracking Capability
  • Ultra-Fast Line and Load Transient Response
    • Voltage-Mode PWM Control
    • Wide-Bandwidth Voltage Loop Error Amplifier
  • Precision Enable with Hysteresis
  • Integrated OVP, UVP, OCP, and UVLO
  • Open-Drain Power Good Indicator
  • Thermal Shutdown Protection With Hysteresis
  • Thermally-Enhanced HTSSOP-20 Package
  • Create a custom design using the LM21215A with the WEBENCH® Power Designer
  • High-Efficiency Synchronous DC/DC Converter
    • Input Voltage Range of 2.95 V to 5.5 V
    • Adjustable Output Voltage From 0.6 V to VIN
    • Output Current as High as 15 A
  • Frequency Synchronization 300 kHz to 1.5 MHz
  • Integrated 7-mΩ PMOS Buck Switch Supports 100% Duty Cycle for Low Dropout Voltage
  • Integrated 4.3-mΩ NMOS Synchronous Rectifier Eliminates Schottky Diode
  • Accurate ±1% Internal Voltage Reference
  • Automatic Diode Emulation Mode for Improved Efficiency at Light Loads
  • Monotonic Pre-Biased Startup
  • Internal 0.5-ms or Externally Adjustable Soft Start
  • Output Voltage Tracking Capability
  • Ultra-Fast Line and Load Transient Response
    • Voltage-Mode PWM Control
    • Wide-Bandwidth Voltage Loop Error Amplifier
  • Precision Enable with Hysteresis
  • Integrated OVP, UVP, OCP, and UVLO
  • Open-Drain Power Good Indicator
  • Thermal Shutdown Protection With Hysteresis
  • Thermally-Enhanced HTSSOP-20 Package
  • Create a custom design using the LM21215A with the WEBENCH® Power Designer

The LM21215A is a synchronous buck DC-DC converter that delivers up to 15 A of output current at output voltages as low as 0.6 V. Operating over an input voltage range of 2.95 V to 5.5 V with ultra-high efficiency, the LM21215A suits a wide variety of low voltage systems. The voltage-mode control loop with high gain-bandwidth error amplifier provides high noise immunity, narrow duty cycle capability and is easily compensated for stable operation with any type of output capacitor, providing maximum flexibility and ease of use.

The LM21215A features internal overvoltage protection (OVP) and cycle-by-cycle overcurrent protection (OCP) for increased system reliability. A precision enable pin and integrated UVLO allow turn-on of the device to be tightly controlled and sequenced. Startup inrush currents are limited by an internally-fixed or externally-adjustable soft-start circuit. An integrated open-drain PGOOD indicator provides fault reporting and supply sequencing.

Other features include auxiliary voltage rail tracking, monotonic startup into pre-biased loads, and switching frequency synchronization to an external clock signal between 300 kHz and 1.5 MHz for beat-frequency sensitive and multi-regulator applications. The LM21215A is offered in a thermally-enhanced 20-pin HTSSOP package with an exposed pad that is soldered to the PCB to achieve a very low junction-to-board thermal impedance.

The LM21215A is a synchronous buck DC-DC converter that delivers up to 15 A of output current at output voltages as low as 0.6 V. Operating over an input voltage range of 2.95 V to 5.5 V with ultra-high efficiency, the LM21215A suits a wide variety of low voltage systems. The voltage-mode control loop with high gain-bandwidth error amplifier provides high noise immunity, narrow duty cycle capability and is easily compensated for stable operation with any type of output capacitor, providing maximum flexibility and ease of use.

The LM21215A features internal overvoltage protection (OVP) and cycle-by-cycle overcurrent protection (OCP) for increased system reliability. A precision enable pin and integrated UVLO allow turn-on of the device to be tightly controlled and sequenced. Startup inrush currents are limited by an internally-fixed or externally-adjustable soft-start circuit. An integrated open-drain PGOOD indicator provides fault reporting and supply sequencing.

Other features include auxiliary voltage rail tracking, monotonic startup into pre-biased loads, and switching frequency synchronization to an external clock signal between 300 kHz and 1.5 MHz for beat-frequency sensitive and multi-regulator applications. The LM21215A is offered in a thermally-enhanced 20-pin HTSSOP package with an exposed pad that is soldered to the PCB to achieve a very low junction-to-board thermal impedance.
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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 LM21215A 2.95-V to 5.5-V,15-A, Voltage-Mode Synchronous Buck Converter With Frequency Synchronization datasheet (Rev. D) PDF | HTML 2019/5/23
選擇指南 Power Management Guide 2018 (Rev. R) 2018/6/25
使用指南 AN-2176 LM10010 Evaluation Board (Rev. B) 2013/5/6

設計與開發

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開發板

LM21215A-1EVM — LM21215A-1 評估板

This evaluation board provides a solution to examine the highefficiency LM21215A-1 buck switching regulator. The LM21215A-1 is capable of driving up to 15A of continuous load current with excellent output voltage accuracy due to its ±1% internal reference. This device also features a clock (...)
使用指南: PDF
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計算工具

LM21215ADESIGN-CALC — LM21215A DC/DC Converter Design Tool - Quick Start Calculator

歡迎使用 LM21215A-1 快速入門設計工具。此獨立工具可協助電源供應工程師設計基於 LM21215A-1 電壓模式 PWM 轉換器的 DC/DC 降壓穩壓器。因此，使用者可以迅速達到最佳化的設計，以符合應用需求。

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HTSSOP (PWP) 20 Ultra Librarian
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