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LM5125-Q1

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Wide-VIN 2.2MHz dual-phase boost controller with VOUT tracking

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LM5125-Q1

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產品詳細資料

Vin (min) (V) 2.5 Vin (max) (V) 45 Operating temperature range (°C) -40 to 150 Control mode current mode control Topology Boost Controller Rating Automotive Vout (min) (V) 6 Vout (max) (V) 60 Features AEC-Q100 Automotive Qual, Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Analog current monitor, Automatic Light Load Management, Automotive load dump, Bypass Mode, Chip-enable control pin, Cycle-by-cycle overcurrent protection, External Sync, Forced PWM, Multiphase, Overcurrent protection with adjustable delay, Power good, Programmable dead time, Spread Spectrum, Tracking, Wettable flanks package Iq (typ) (µA) 250 Duty cycle (max) (%) 99.2 TI functional safety category Functional Safety-Compliant
Vin (min) (V) 2.5 Vin (max) (V) 45 Operating temperature range (°C) -40 to 150 Control mode current mode control Topology Boost Controller Rating Automotive Vout (min) (V) 6 Vout (max) (V) 60 Features AEC-Q100 Automotive Qual, Adjustable current limit, Adjustable soft start, Adjustable switching frequency, Analog current monitor, Automatic Light Load Management, Automotive load dump, Bypass Mode, Chip-enable control pin, Cycle-by-cycle overcurrent protection, External Sync, Forced PWM, Multiphase, Overcurrent protection with adjustable delay, Power good, Programmable dead time, Spread Spectrum, Tracking, Wettable flanks package Iq (typ) (µA) 250 Duty cycle (max) (%) 99.2 TI functional safety category Functional Safety-Compliant
VQFN (RHB) 32 25 mm² 5 x 5
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: TA = –40°C to +125°C
  • Functional Safety-Capable
  • Input voltage 4.5V to 42V
    • Minimum 2.5V for V(BIAS) ≥ 4.5V or VOUT ≥ 6V
  • Output Voltage 6V to 60V
    • 2% accuracy, internal feedback resistors
    • Bypass operation for VI > VOUT
    • Dynamic output voltage tracking
      • Digital PWM tracking (DTRK)
      • Analog tracking (ATRK)
    • Overvoltage protection (64V, 50V, 35V, 28.5V)
  • Low shutdown IQ of 2µA typ. (5µA maximum)
  • Low operating IQ of 1.4mA typ. (2mA maximum)
  • Stacking with interleaved multiphase operation
    • Up to 4-phases without external clock
  • Switching frequency from 100kHz to 2.2MHz
    • Synchronization to external clock (SYNCIN)
    • Dynamically selectable switching modes (FPWM, diode emulation)
    • Spread spectrum (DRSS)
  • Selectable dead time (18ns to 200ns)
  • Current sense resistor or DCR sensing
  • Average inductor current monitor
  • Average input current limit
    • Programmable current limit
    • Selectable delay time
  • Power-good indicator
  • Programmable VI undervoltage lockout (UVLO)
  • Lead-less VQFN-32 package with wettable flanks
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: TA = –40°C to +125°C
  • Functional Safety-Capable
  • Input voltage 4.5V to 42V
    • Minimum 2.5V for V(BIAS) ≥ 4.5V or VOUT ≥ 6V
  • Output Voltage 6V to 60V
    • 2% accuracy, internal feedback resistors
    • Bypass operation for VI > VOUT
    • Dynamic output voltage tracking
      • Digital PWM tracking (DTRK)
      • Analog tracking (ATRK)
    • Overvoltage protection (64V, 50V, 35V, 28.5V)
  • Low shutdown IQ of 2µA typ. (5µA maximum)
  • Low operating IQ of 1.4mA typ. (2mA maximum)
  • Stacking with interleaved multiphase operation
    • Up to 4-phases without external clock
  • Switching frequency from 100kHz to 2.2MHz
    • Synchronization to external clock (SYNCIN)
    • Dynamically selectable switching modes (FPWM, diode emulation)
    • Spread spectrum (DRSS)
  • Selectable dead time (18ns to 200ns)
  • Current sense resistor or DCR sensing
  • Average inductor current monitor
  • Average input current limit
    • Programmable current limit
    • Selectable delay time
  • Power-good indicator
  • Programmable VI undervoltage lockout (UVLO)
  • Lead-less VQFN-32 package with wettable flanks

The LM5125-Q1 is a stackable, multiphase, synchronous, boost controller. The device provides a regulated output voltage for lower or equal input voltage also supporting VI to VOUT bypass mode to save power. Two devices can be stacked with or without external clock.

VOUT can be dynamically programmed using the digital or analog ATRK/DTRK function. VI can be as low as 2.5V after start-up as the internal VCC supply is automatically switched from VBIAS to VOUT for VBIAS < 4.5V. The fixed switching frequency is set between 100kHz and 2.2MHz through a resistor on the RT pin or the SYNCIN clock. The switching modes, FPWM, or diode emulation can be changed during operation.

The implemented protections peak current limit, average input current limit, average inductor current monitor, over and undervoltage protection, or the thermal shutdown protect the device and the application.

The LM5125-Q1 is a stackable, multiphase, synchronous, boost controller. The device provides a regulated output voltage for lower or equal input voltage also supporting VI to VOUT bypass mode to save power. Two devices can be stacked with or without external clock.

VOUT can be dynamically programmed using the digital or analog ATRK/DTRK function. VI can be as low as 2.5V after start-up as the internal VCC supply is automatically switched from VBIAS to VOUT for VBIAS < 4.5V. The fixed switching frequency is set between 100kHz and 2.2MHz through a resistor on the RT pin or the SYNCIN clock. The switching modes, FPWM, or diode emulation can be changed during operation.

The implemented protections peak current limit, average input current limit, average inductor current monitor, over and undervoltage protection, or the thermal shutdown protect the device and the application.
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類型 標題 日期
* Data sheet LM5125-Q1, Wide-VIN, Dual-Phase, Automotive, Boost Controller With VOUT Tracking datasheet PDF | HTML 2024年 12月 2日
Functional safety information LM5125-Q1, LM51251-Q1 Functional Safety FIT, FMD and Pin FMA PDF | HTML 2024年 11月 13日

設計與開發

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開發板

LM5125EVM-BST — LM5125 評估模組

LM5125 評估模組展示了 LM5125-Q1 寬輸入電壓同步雙相升壓控制器的功能和性能。此 EVM 旨在簡化配置，讓使用者能夠評估模組在不同條件下的性能。標準配置旨在提供 24V 和 300W 輸出。輸出電壓可透過 ATRK/DTRK 接腳進行動態調整。

使用指南: PDF | HTML
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應用軟體及架構

LM5125-DESIGN — LM5125 design resources

This resource includes the preliminary calculator and GUIs for LM5125, LM51251, LM5126 and LM51261
支援產品和硬體

支援產品和硬體

產品
AC/DC 和 DC/DC 控制器 (外部 FET)
LM5125-Q1 — Wide-VIN 2.2MHz dual-phase boost controller with VOUT tracking
硬體開發
開發板
LM5125EVM-BST — LM5125 評估模組
要求
計算工具

LM5125-CALC — LM5125 quick start calculator

LM5125 quick start calculator helps on design of the power stage, component selection and loop compensation.
支援產品和硬體

支援產品和硬體

產品
AC/DC 和 DC/DC 控制器 (外部 FET)
LM5125-Q1 — Wide-VIN 2.2MHz dual-phase boost controller with VOUT tracking
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VQFN (RHB) 32 Ultra Librarian
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