LM2641

Name: LM2641
Brand: TI
SKU: LM2641
Price: 4.066 USD

새 설계에 권장하지 않음

LDO를 지원하는 5.5V~30V 입력, 300kHz, 동기 DCAP2 모드 듀얼 스텝다운 컨트롤러

지금 주문

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document-pdfAcrobat LM2641 Dual Adjustable Step-Down Switching Power Supply Controller datasheet (Rev. B) (영어)

LM2641은(는) 새 설계에 권장하지 않습니다

이 제품은 이전 설계를 지원하기 위해 계속 생산 중이지만 새로운 설계에 사용하는 것은 권장하지 않습니다. 다음 대안 중 하나를 고려하십시오.

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대안 비교

비교 대상 장치와 유사한 기능

신규 TPS56837

활성

4.5V~28V 입력, 8A 동기식 벅 컨버터 Higher power density integrated FET converter solution for up to 8A output current

LM2641

새 설계에 권장하지 않음

데이터시트

지금 주문

제품 상세 정보

Vin (min) (V)

5.5

Vin (max) (V)

Iout (max) (A)

Operating temperature range (°C)

0 to 0

Control mode

current mode

Rating

Catalog

Vout (min) (V)

2.2

Vout (max) (V)

Iq (typ) (A)

0.0006

Duty cycle (max) (%)

Number of phases

Vin (min) (V)

5.5

Vin (max) (V)

Iout (max) (A)

Operating temperature range (°C)

0 to 0

Control mode

current mode

Rating

Catalog

Vout (min) (V)

2.2

Vout (max) (V)

Iq (typ) (A)

0.0006

Duty cycle (max) (%)

Number of phases

TSSOP (PW)

62.08 mm² 9.7 x 6.4

300 kHz Fixed-Frequency Switching
Switching Synchronization with an External Signal up to 400 kHz
Optional Pulse-Skipping Mode
Adjustable Secondary Feedback
Input Undervoltage Lockout
Output Undervoltage Shutdown Protection
Output Overvoltage Shutdown Protection
Programmable Soft-Start (Each Controller)
5V, 50 mA Linear Regulator Output
Precision 2.5V Reference Output
28-pin TSSOP

Key Specifications

96 % Efficient
5.5 – 30 V Input Range
Dual Outputs Adjustable from 2.2 – 8 V
0.5 % Typical Load Regulation Error
0.002 %/V Typical Line Regulation Error

All trademarks are the property of their respective owners.

300 kHz Fixed-Frequency Switching
Switching Synchronization with an External Signal up to 400 kHz
Optional Pulse-Skipping Mode
Adjustable Secondary Feedback
Input Undervoltage Lockout
Output Undervoltage Shutdown Protection
Output Overvoltage Shutdown Protection
Programmable Soft-Start (Each Controller)
5V, 50 mA Linear Regulator Output
Precision 2.5V Reference Output
28-pin TSSOP

Key Specifications

96 % Efficient
5.5 – 30 V Input Range
Dual Outputs Adjustable from 2.2 – 8 V
0.5 % Typical Load Regulation Error
0.002 %/V Typical Line Regulation Error

All trademarks are the property of their respective owners.

The LM2641 is a dual step-down power supply controller intended for application in notebook personal computers and other battery-powered equipment.

Fixed-frequency synchronous drive of logic-level N-channel power MOSFETs is combined with an optional pulse-skipping mode to achieve ultra efficient power conversion over a 1000:1 load current range. The pulse-skipping mode can be disabled in favor of fixed-frequency operation regardless of the load current level.

High DC gain and current-mode feedback control assure excellent line and load regulation and a wide loop bandwidth for fast response to dynamic loads.

An internal oscillator fixes the switching frequency at 300 kHz. Optionally, switching can be synchronized to an external clock running as fast as 400 kHz.

An optional soft-start feature limits current surges from the input power supply at start up and provides a simple means of start-up sequencing.

Logic-level inputs allow the controllers to be turned ON and OFF separately.