LM25085A

Name: LM25085A
Brand: TI
SKU: LM25085A
Price: 1.002 USD

활성

0.9V 레퍼런스가 포함된 4.5~42V 넓은 입력 전압 범위, COT(Constant-On-Time) 비동기 PFET 벅 컨트롤러

지금 주문

데이터 시트

document-pdfAcrobat 42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference datasheet (Rev. B) (영어)

이 제품의 최신 버전이 있습니다

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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.

LM25085A

활성

데이터 시트

지금 주문

제품 상세 정보

Rating

Catalog

Topology

Buck Controller

Iout (max) (A)

10

Vin (max) (V)

42

Vin (min) (V)

4.5

Vout (max) (V)

42

Vout (min) (V)

0.9

Control mode

Constant on-time (COT)

Features

Adjustable current limit, Frequency synchronization

Operating temperature range (°C)

-40 to 125

Iq (typ) (µA)

1250

Duty cycle (max) (%)

100

Number of phases

1

Rating

Catalog

Topology

Buck Controller

Iout (max) (A)

10

Vin (max) (V)

42

Vin (min) (V)

4.5

Vout (max) (V)

42

Vout (min) (V)

0.9

Control mode

Constant on-time (COT)

Features

Adjustable current limit, Frequency synchronization

Operating temperature range (°C)

-40 to 125

Iq (typ) (µA)

1250

Duty cycle (max) (%)

100

Number of phases

1

HVSSOP (DGN)

8

14.7 mm² 3 x 4.9

VSSOP (DGK)

8

14.7 mm² 3 x 4.9

WSON (NGQ)

8

9 mm² 3 x 3

Wide 4.5V to 42V Input Voltage Range
Adjustable Current Limit using R_DS(ON) or a Current Sense Resistor
Programmable Switching Frequency to 1MHz
No Loop Compensation Required
Ultra-Fast Transient Response
Nearly Constant Operating Frequency with Line and Load Variations
Adjustable Output Voltage from 0.9V
Precision ±2% Feedback Reference
Capable of 100% Duty Cycle Operation
Internal Soft-Start Timer
Integrated High Voltage Bias Regulator
Thermal Shutdown

All trademarks are the property of their respective owners.

Wide 4.5V to 42V Input Voltage Range
Adjustable Current Limit using R_DS(ON) or a Current Sense Resistor
Programmable Switching Frequency to 1MHz
No Loop Compensation Required
Ultra-Fast Transient Response
Nearly Constant Operating Frequency with Line and Load Variations
Adjustable Output Voltage from 0.9V
Precision ±2% Feedback Reference
Capable of 100% Duty Cycle Operation
Internal Soft-Start Timer
Integrated High Voltage Bias Regulator
Thermal Shutdown

All trademarks are the property of their respective owners.

The LM25085A is a functional variant of the LM25085 COT PFET Buck Switching Controller. The functional differences of the LM25085A are: The feedback reference voltage is 0.9V, the forced off-time after current limit detection is longer, and the soft-start time is shorter (1.8 ms).

The LM25085A is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications. This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.5V to 42V input range. The constant on-time regulation principle requires no loop compensation, simplifies circuit implementation, and results in ultra-fast load transient response. The operating frequency remains nearly constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The PFET architecture allows 100% duty cycle operation for a low dropout voltage. Either the R_DS(ON) of the PFET or an external sense resistor can be used to sense current for over-current detection.

The LM25085A is a functional variant of the LM25085 COT PFET Buck Switching Controller. The functional differences of the LM25085A are: The feedback reference voltage is 0.9V, the forced off-time after current limit detection is longer, and the soft-start time is shorter (1.8 ms).

The LM25085A is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications. This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.5V to 42V input range. The constant on-time regulation principle requires no loop compensation, simplifies circuit implementation, and results in ultra-fast load transient response. The operating frequency remains nearly constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The PFET architecture allows 100% duty cycle operation for a low dropout voltage. Either the R_DS(ON) of the PFET or an external sense resistor can be used to sense current for over-current detection.

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기타 AC/DC 및 DC/DC 컨트롤러(외장 FET) 찾기

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기술 자료

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=TI에서 선정한 이 제품의 인기 문서

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4개 모두 보기

	유형	직함	날짜
*	Data sheet	42V Constant On-Time PFET Buck Switching Controller with 0.9V Reference datasheet (Rev. B)	2013/03/06
	Selection guide	Power Management Guide 2018 (Rev. R)	2018/06/25
	Analog Design Journal	Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics	2016/07/21
	Application note	Constant Current Constant Voltage Buck Converter w/LM25085 (Rev. A)	2013/04/23

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평가 보드

LM25085AMYEEVAL — LM25085AMYEEVAL 42V COT(Constant-On-Time) PFET 벅 스위칭 컨트롤러(0.9V 레퍼런스 포함)

The LM25085AMYE evaluation board provides the design engineer with a fully functional buck regulator, employing the LM25085A PFET switching controller which uses the constant on-time (COT) operating principle. This evaluation board provides a 1V output over an input range of 4.5V to 24V. The (...)

사용 설명서: PDF