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AC/DC 和 DC/DC 轉換器 (整合式 FET)

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 Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 15 Vin (min) (V) 2.95 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 1500 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode Voltage mode Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iq (typ) (µA) 1500 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 15 Vin (min) (V) 2.95 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 300 Switching frequency (max) (kHz) 1500 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Control mode Voltage mode Vout (min) (V) 0.6 Vout (max) (V) 5.5 Iq (typ) (µA) 1500 Duty cycle (max) (%) 100
HTSSOP (PWP) 20 41.6 mm² 6.5 x 6.4
  • 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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類型 標題 日期
* Data sheet LM21215A 2.95-V to 5.5-V,15-A, Voltage-Mode Synchronous Buck Converter With Frequency Synchronization datasheet (Rev. D) PDF | HTML 2019年 5月 23日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
User guide AN-2176 LM10010 Evaluation Board (Rev. B) 2013年 5月 6日
User guide AN-2131 LM21215A-1 Evaluation Board (Rev. A) 2013年 5月 5日

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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

Welcome to the LM21215A-1 quickstart design tool. This standalone tool facilitates and assists the power supply engineer with design of a DC/DC buck regulator based on the LM21215A-1 voltage-mode PWM converter. As such, the user can expeditiously arrive at an optimized design to meet the (...)

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產品
AC/DC 和 DC/DC 轉換器 (整合式 FET)
LM21215A — 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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開發板
LM21215A-1EVM — LM21215A-1 評估板
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HTSSOP (PWP) 20 Ultra Librarian
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