전원 관리 AC/DC 및 DC/DC 컨트롤러(외장 FET)

LM27402

활성

3V~20V, 전압 모드 동기 벅 컨트롤러(DCR 전류 감지)

제품 상세 정보

Vin (min) (V) 3 Vin (max) (V) 20 Iout (max) (A) 30 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 18.6 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Iq (typ) (µA) 4500 Duty cycle (max) (%) 95 Number of phases 1
Vin (min) (V) 3 Vin (max) (V) 20 Iout (max) (A) 30 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 18.6 Features Enable, Frequency synchronization, Power good, Pre-Bias Start-Up, Synchronous Rectification, Tracking Iq (typ) (µA) 4500 Duty cycle (max) (%) 95 Number of phases 1
HTSSOP (PWP) 16 32 mm² 5 x 6.4 WQFN (RUM) 16 16 mm² 4 x 4
  • Wide Input-Voltage Range of 3 V to 20 V
  • Inductor DCR or Shunt Resistor Based Overcurrent Protection
  • 0.6-V Reference With ±1% FB Accuracy Across Full –40°C to 125°C Junction Temperature Range
  • Switching Frequency from 200 kHz to 1.2 MHz
  • Output Voltage as High as 95% of Input Voltage
  • Integrated High-Current MOSFET Drivers
  • Internal VDD Bias Supply LDO Subregulator
  • External Clock Synchronization
  • Adjustable Soft Start With External Capacitor
  • Prebiased Start-up Capability
  • Power Supply Tracking
  • Voltage-Mode Control With Line Feedforward
  • Open-Drain Power-Good Indicator
  • Precision Enable With Hysteresis
  • 16-Pin HTSSOP and WQFN Packages
  • Create a Custom Design Using the LM27402 With the WEBENCH® Power Designer
  • Wide Input-Voltage Range of 3 V to 20 V
  • Inductor DCR or Shunt Resistor Based Overcurrent Protection
  • 0.6-V Reference With ±1% FB Accuracy Across Full –40°C to 125°C Junction Temperature Range
  • Switching Frequency from 200 kHz to 1.2 MHz
  • Output Voltage as High as 95% of Input Voltage
  • Integrated High-Current MOSFET Drivers
  • Internal VDD Bias Supply LDO Subregulator
  • External Clock Synchronization
  • Adjustable Soft Start With External Capacitor
  • Prebiased Start-up Capability
  • Power Supply Tracking
  • Voltage-Mode Control With Line Feedforward
  • Open-Drain Power-Good Indicator
  • Precision Enable With Hysteresis
  • 16-Pin HTSSOP and WQFN Packages
  • Create a Custom Design Using the LM27402 With the WEBENCH® Power Designer

The LM27402 is a voltage-mode, synchronous, DC/DC step-down controller with lossless inductor DCR current sensing capability. Sensing the inductor current eliminates the need to add resistive powertrain elements, which increases overall efficiency and facilitates accurate, continuous current sensing. A 0.6-V ±1% voltage reference enables high accuracy and low voltage capability at the output. An input operating voltage range of 3 V to 20 V makes the LM27402 suitable for a large variety of input rails.

The LM27402 voltage-mode control loop incorporates input voltage feed forward to maintain stability throughout the entire input-voltage range. The switching frequency is adjustable from 200 kHz to
1.2 MHz. Dual, high-current, integrated MOSFET drivers support large QG, low RDS(on) power MOSFETs. A power-good indicator provides power-rail-sequencing capability and output fault detection. An adjustable external soft start limits inrush current and provides monotonic output control during start-up. Other features include external tracking of other power supplies, integrated LDO bias supply, and synchronization capability.

The LM27402 is a voltage-mode, synchronous, DC/DC step-down controller with lossless inductor DCR current sensing capability. Sensing the inductor current eliminates the need to add resistive powertrain elements, which increases overall efficiency and facilitates accurate, continuous current sensing. A 0.6-V ±1% voltage reference enables high accuracy and low voltage capability at the output. An input operating voltage range of 3 V to 20 V makes the LM27402 suitable for a large variety of input rails.

The LM27402 voltage-mode control loop incorporates input voltage feed forward to maintain stability throughout the entire input-voltage range. The switching frequency is adjustable from 200 kHz to
1.2 MHz. Dual, high-current, integrated MOSFET drivers support large QG, low RDS(on) power MOSFETs. A power-good indicator provides power-rail-sequencing capability and output fault detection. An adjustable external soft start limits inrush current and provides monotonic output control during start-up. Other features include external tracking of other power supplies, integrated LDO bias supply, and synchronization capability.

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기술 자료

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11개 모두 보기
유형 직함 날짜
* Data sheet LM27402 High-Performance Synchronous Buck Controller With DCR Current Sensing datasheet (Rev. K) PDF | HTML 2018/02/23
Certificate LM27402SQEVAL EU RoHS Declaration of Conformity (DoC) (Rev. A) 2022/03/08
User guide LM27402 Buck Controller Evaluation Module User's Guide (Rev. C) PDF | HTML 2022/01/10
Selection guide Power Management Guide 2018 (Rev. R) 2018/06/25
Analog Design Journal Common mistakes made in controller designs for power converters 2018/03/26
Application brief Using DC/DC Controllers to Improve Bitcoin Miner Designs 2018/03/15
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016/07/21
Technical article High Density PCB Layout of DC/DC Converters, Part 2 PDF | HTML 2015/09/16
Technical article High Density PCB Layout of DC/DC Converters, Part 1 PDF | HTML 2015/09/12
Application note AN-2060 LM27402 Current Limit Application Circuits (Rev. A) 2013/05/06
Application note Current Limit Foldback Improves Short Circuit Protection in LM274X Family (Rev. B) 2013/04/23

설계 및 개발

추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.

평가 보드

LM27402SQEVAL — LM27402 평가 보드

The LM27402 evaluation board represents a 20A typical application circuit. The application circuit is optimized for an input voltage of 12V. However, input voltage feed-forward technology allows the evaluation board to operate up to 20V while maintaining a stable output voltage of 1.5V at 20A. (...)

사용 설명서: PDF | HTML
TI.com에서 구매 불가
시뮬레이션 모델

LM27402 PSpice Average Model

SNVM430.ZIP (55 KB) - PSpice Model
시뮬레이션 모델

LM27402 PSpice Transient Model

SNVM429.ZIP (228 KB) - PSpice Model
시뮬레이션 모델

LM27402 TINA-TI Transient Reference Design (Load Tran)

SNVM468.TSC (2802 KB) - TINA-TI Reference Design
시뮬레이션 모델

LM27402 TINA-TI Transient Reference Design (Startup)

SNVM470.TSC (1870 KB) - TINA-TI Reference Design
시뮬레이션 모델

LM27402 TINA-TI Transient Spice Model

SNVM469.ZIP (22 KB) - TINA-TI Spice Model
시뮬레이션 모델

LM27402 Unencrypted PSpice Average Model

SNVM843.ZIP (1 KB) - PSpice Model
시뮬레이션 모델

LM27402 Unencrypted PSpice Transient Model

SNVM844.ZIP (3 KB) - PSpice Model
계산 툴

LM27402DESIGN-CALC — LM27402 설계 계산기

패키지 CAD 기호, 풋프린트 및 3D 모델
HTSSOP (PWP) 16 Ultra Librarian
WQFN (RUM) 16 Ultra Librarian

주문 및 품질

포함된 정보:
  • RoHS
  • REACH
  • 디바이스 마킹
  • 납 마감/볼 재질
  • MSL 등급/피크 리플로우
  • MTBF/FIT 예측
  • 물질 성분
  • 인증 요약
  • 지속적인 신뢰성 모니터링
포함된 정보:
  • 팹 위치
  • 조립 위치

지원 및 교육

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