전원 관리 AC/DC 및 DC/DC 컨버터(통합 FET)

LM21212-1

활성

2.95~5.5V, 12A, 전압 모드 동기 벅 레귤레이터(주파수 동기화 지원)

이 제품의 최신 버전이 있습니다

open-in-new 대안 비교
비교 대상 장치와 유사한 기능
TPS62872 활성 6V, 12A, 적층형 동기식 벅 컨버터 Smaller total BOM count and size

제품 상세 정보

Rating Catalog Operating temperature range (°C) -40 to 125 Topology Buck Type Converter Iout (max) (A) 12 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) 12 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
  • Integrated 7-mΩ high-side and 4.3-mΩ low-side FET switches
  • 300-kHz to 1.5-MHz frequency SYNC pin
  • Adjustable output voltage from 0.6 V to VIN (100% duty cycle capable), ±1% reference
  • Input voltage range 2.95 V to 5.5 V
  • Start-up Into prebiased loads
  • Output voltage tracking capability
  • Wide bandwidth voltage loop error amplifier
  • Adjustable soft-start with external capacitor
  • Precision enable (EN) pin with hysteresis
  • Integrated OVP, OCP, OTP, UVLO and power-good
  • Thermally enhanced HTSSOP-20 exposed pad package
  • Create a custom design using the LM21212-1 with the WEBENCH® Power Designer
  • Integrated 7-mΩ high-side and 4.3-mΩ low-side FET switches
  • 300-kHz to 1.5-MHz frequency SYNC pin
  • Adjustable output voltage from 0.6 V to VIN (100% duty cycle capable), ±1% reference
  • Input voltage range 2.95 V to 5.5 V
  • Start-up Into prebiased loads
  • Output voltage tracking capability
  • Wide bandwidth voltage loop error amplifier
  • Adjustable soft-start with external capacitor
  • Precision enable (EN) pin with hysteresis
  • Integrated OVP, OCP, OTP, UVLO and power-good
  • Thermally enhanced HTSSOP-20 exposed pad package
  • Create a custom design using the LM21212-1 with the WEBENCH® Power Designer

The LM21212-1 is a monolithic synchronous point-of-load buck regulator that is capable of delivering up to 12 A of continuous output current while producing an output voltage down to 0.6 V with outstanding efficiency. The device is optimized to work over an input voltage range of 2.95 V to 5.5 V, making it suited for a wide variety of low voltage systems. The voltage mode control loop provides high noise immunity, narrow duty-cycle capability and can be compensated to be stable with any type of output capacitance, providing maximum flexibility and ease of use.

The LM21212-1 features internal overvoltage protection (OVP) and overcurrent protection (OCP) for increased system reliability. A precision enable pin and integrated UVLO allow turnon of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good circuit.

The LM21212-1 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track an external voltage rail using the SS/TRK pin. The switching frequency can be synchronized to the falling edge of a clock between frequencies of 300 kHz to 1.5 MHz.

If the output is prebiased at start-up, it does not sink current, allowing the output to smoothly rise past the prebiased voltage. The regulator is offered in a 20-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heat sinks.

The LM21212-1 is a monolithic synchronous point-of-load buck regulator that is capable of delivering up to 12 A of continuous output current while producing an output voltage down to 0.6 V with outstanding efficiency. The device is optimized to work over an input voltage range of 2.95 V to 5.5 V, making it suited for a wide variety of low voltage systems. The voltage mode control loop provides high noise immunity, narrow duty-cycle capability and can be compensated to be stable with any type of output capacitance, providing maximum flexibility and ease of use.

The LM21212-1 features internal overvoltage protection (OVP) and overcurrent protection (OCP) for increased system reliability. A precision enable pin and integrated UVLO allow turnon of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good circuit.

The LM21212-1 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track an external voltage rail using the SS/TRK pin. The switching frequency can be synchronized to the falling edge of a clock between frequencies of 300 kHz to 1.5 MHz.

If the output is prebiased at start-up, it does not sink current, allowing the output to smoothly rise past the prebiased voltage. The regulator is offered in a 20-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heat sinks.

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기술 자료

star =TI에서 선정한 이 제품의 인기 문서
검색된 결과가 없습니다. 검색어를 지우고 다시 시도하십시오.
4개 모두 보기
유형 직함 날짜
* Data sheet LM21212-1 2.95-V To 5.5-V, 12-A, Voltage-Mode Synchronous Buck Regulator With Frequency Synchronization datasheet (Rev. F) PDF | HTML 2019/05/21
Selection guide Buck Converter Quick Reference Guide (Rev. B) 2021/04/08
Selection guide Power Management Guide 2018 (Rev. R) 2018/06/25
User guide AN-2107 LM21212-1 Evaluation Board (Rev. B) 2013/05/05

설계 및 개발

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

평가 보드

LM21212-1EVM — LM21212-1EVM 평가 보드

This evaluation board provides a solution to examine the high efficiency LM21212-1 buck switching regulator. The LM21212-1 is capable of driving up to 12A of continuous load current with excellent output voltage accuracy due to its ±1% internal reference. This device also features a clock (...)

사용 설명서: PDF
TI.com에서 구매 불가
시뮬레이션 모델

LM21212-1 PSpice Average Model

SNVM395.ZIP (53 KB) - PSpice Model
시뮬레이션 모델

LM21212-1 PSpice Transient Model

SNVM394.ZIP (192 KB) - PSpice Model
시뮬레이션 모델

LM21212-1 Unencrypted PSpice Average Model

SNVM802.ZIP (1 KB) - PSpice Model
시뮬레이션 모델

LM21212-1 Unencrypted PSpice Transient Model

SNVM801.ZIP (2 KB) - PSpice Model
계산 툴

LM21212-1DESIGN-CALC — LM21212-1 설계 스프레드시트

레퍼런스 디자인

PMP7804 — Kintex 7 애플리케이션용 다중 출력 전력 솔루션

The PMP7804 reference design provides all the power supply rails necessary to power the Xilinx ® Kintex ® 7 series family of FPGAs.  This design utilizes Simple Switcher power modules along with the LM2121x low voltage synchronous buck regulators for "ease of use" and shorter design (...)
Test report: PDF
회로도: PDF
패키지 CAD 기호, 풋프린트 및 3D 모델
HTSSOP (PWP) 20 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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