LM3485

활성

4.5~35V, 히스테리시스 비동기형 PFET 벅 컨트롤러

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document-pdfAcrobat LM3485 Hysteretic PFET Buck Controller datasheet (Rev. H) (영어) PDF | HTML

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대안 비교

다른 핀 출력을 지원하지만 비교 대상 장치와 동일한 기능.

LM25148

활성

초저 IQ를 지원하는 42V 동기식 벅 DC/DC 컨트롤러 Improved EMI performance with QFN package and dual random spread spectrum.

LM3485

활성

데이터 시트

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제품 상세 정보

Rating

Catalog

Topology

Buck Controller

Iout (max) (A)

10

Vin (max) (V)

35

Vin (min) (V)

4.5

Vout (max) (V)

35

Vout (min) (V)

1.242

Control mode

Hysteretic

Features

Enable

Duty cycle (max) (%)

100

Iq (typ) (A)

0.00025

Number of phases

1

Operating temperature range (°C)

-40 to 125

Rating

Catalog

Topology

Buck Controller

Iout (max) (A)

10

Vin (max) (V)

35

Vin (min) (V)

4.5

Vout (max) (V)

35

Vout (min) (V)

1.242

Control mode

Hysteretic

Features

Enable

Duty cycle (max) (%)

100

Iq (typ) (A)

0.00025

Number of phases

1

Operating temperature range (°C)

-40 to 125

VSSOP (DGK)

8

14.7 mm² (3 mm × 4.9 mm)

Easy-to-Use Control Methodology
No Control-Loop Compensation Required
4.5-V to 35-V Wide Input Range
1.242-V to V_IN Adjustable Output Range
High Efficiency 93%
±1.3% (±2% Over Temp) Internal Reference
100% Duty Cycle
Maximum Operating Frequency > 1 MHz
Current Limit Protection

Easy-to-Use Control Methodology
No Control-Loop Compensation Required
4.5-V to 35-V Wide Input Range
1.242-V to V_IN Adjustable Output Range
High Efficiency 93%
±1.3% (±2% Over Temp) Internal Reference
100% Duty Cycle
Maximum Operating Frequency > 1 MHz
Current Limit Protection

The LM3485 is a high-efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, low-cost, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control-loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultralow dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple.

Current limit protection is provided by measuring the voltage across the R_DS(ON) of the PFET, thus eliminating the need for a sense resistor. The cycle-by-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.

The LM3485 is a high-efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, low-cost, switching buck regulator for a wide range of applications. The hysteretic control architecture provides for simple design without any control-loop stability concerns using a wide variety of external components. The PFET architecture also allows for low component count as well as ultralow dropout, 100% duty cycle operation. Another benefit is high efficiency operation at light loads without an increase in output ripple.

Current limit protection is provided by measuring the voltage across the R_DS(ON) of the PFET, thus eliminating the need for a sense resistor. The cycle-by-cycle current limit can be adjusted with a single resistor, ensuring safe operation over a range of output currents.

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기타 DC/DC 컨트롤러 찾기

다운로드 스크립트와 함께 비디오 보기 비디오

기술 자료

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4개 모두 보기

상위 문서	유형	직함	형식 옵션	날짜
*	데이터 시트	LM3485 Hysteretic PFET Buck Controller datasheet (Rev. H)	PDF \| HTML	2015. 12. 28
	아날로그 디자인 학술지	Control-Mode Quick Reference Guide (Rev. B)	PDF \| HTML	2023. 8. 29
	선택 가이드	Power Management Guide 2018 (Rev. R)		2018. 6. 25
	아날로그 디자인 학술지	Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics		2016. 7. 21

설계 및 개발

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평가 보드

LM3485EVAL — 히스테리시스 PFET 벅 컨트롤러 평가 모듈

Hysteretic PFET Buck Controller

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