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LT1374 - LT1374是4.5A, 500kHz Step-Down Switching Regulator

LT1374是LINEAR凌力尔特公司的一款SEPIC 稳压器产品，LT1374是LT1374是4.5A, 500kHz Step-Down Switching Regulator，本站介绍了LT1374的封装应用图解、特点和优点、功能等，并给出了与LT1374相关的LINEAR元器件型号供参考。

LT1374 - LT1374是4.5A, 500kHz Step-Down Switching Regulator - SEPIC 稳压器 - 电源管理 - 凌力尔特

LT1374 - 4.5A, 500kHz Step-Down Switching Regulator

LT1374 - 4.5A, 500kHz Step-Down Switching Regulator - Linear Technology（凌力尔特）

功能描述

The LT1374 is a 500kHz monolithic buck mode switching regulator. A 4.5A switch is included on the die along with all the necessary oscillator, control and logic circuitry. High switching frequency allows a considerable reduction in the size of external components. The topology is current mode for fast transient response and good loop stability. Both fixed output voltage and adjustable parts are available.

A special high speed bipolar process and new design techniques achieve high efficiency at high switching frequency. Efficiency is maintained over a wide output current range by using the output to bias the circuitry and by utilizing a supply boost capacitor to saturate the power switch.

The LT1374 is available in standard 7-pin DD, TO-220, fused lead SO-8 and 16-pin exposed pad TSSOP packages. Full cycle-by-cycle short-circuit protection and thermal shutdown are provided. Standard surface mount external parts may be used, including the inductor and capacitors. There is the optional function of shutdown or synchronization. A shutdown signal reduces supply current to 20µA. Synchronization allows an external logic level signal to increase the internal oscillator from 580kHz to 1MHz.

Protected by U.S. Patents, Including 6111439, 5668493, 5656965

特点

Constant 500kHz Switching Frequency

High Power 16-Pin TSSOP Package Available

Uses All Surface Mount Components

Inductor Size Reduced to 1.8µH

Saturating Switch Design: 0.07Ω

Effective Supply Current: 2.5mA

Shutdown Current: 20µA

Cycle-by-Cycle Current Limiting

Easily Synchronizable

应用

Portable Computers

Battery-Powered Systems

Battery Chargers

Distributed Power

以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）

器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量)
LT1374CFE	TSSOP-16	C	$5.38	$4.55
LT1374CFE#PBF	TSSOP-16	C	$5.38	$4.55
LT1374CFE#TR	TSSOP-16	C		$4.67
LT1374CFE#TRPBF	TSSOP-16	C		$4.67
LT1374CR	DDPAK-7	C	$5.50	$4.70
LT1374CR-5	DDPAK-7	C	$5.50	$4.70
LT1374CR-5#PBF	DDPAK-7	C	$5.50	$4.70
LT1374CR-5#TR	DDPAK-7	C		$4.82
LT1374CR-5#TRPBF	DDPAK-7	C		$4.82
LT1374CR-5SYNC	DDPAK-7	C	$5.50	$4.70
LT1374CR-5SYNC#PBF	DDPAK-7	C	$5.50	$4.70
LT1374CR-5Sync#TR	DDPAK-7	C		$4.82
LT1374CR-5Sync#TRPBF	DDPAK-7	C		$4.82
LT1374CR-SYNC	DDPAK-7	C	$5.50	$4.70
LT1374CR-SYNC#PBF	DDPAK-7	C	$5.50	$4.70
LT1374CR-Sync#TR	DDPAK-7	C		$4.82
LT1374CR-Sync#TRPBF	DDPAK-7	C		$4.82
LT1374CR#PBF	DDPAK-7	C	$5.50	$4.70
LT1374CR#TR	DDPAK-7	C		$4.82
LT1374CR#TRPBF	DDPAK-7	C		$4.82
LT1374CS8	SO-8	C	$5.00	$4.40
LT1374CS8-5	SO-8	C	$5.00	$4.40
LT1374CS8-5#PBF	SO-8	C	$5.00	$4.40
LT1374CS8-5#TR	SO-8	C		$4.46
LT1374CS8-5#TRPBF	SO-8	C		$4.46
LT1374CS8-5SYNC	SO-8	C	$5.00	$4.40
LT1374CS8-5SYNC#PBF	SO-8	C	$5.00	$4.40
LT1374CS8-5Sync#TR	SO-8	C		$4.46
LT1374CS8-5Sync#TRPBF	SO-8	C		$4.46
LT1374CS8-SYNC	SO-8	C	$5.00	$4.40
LT1374CS8-SYNC#PBF	SO-8	C	$5.00	$4.40
LT1374CS8-Sync#TR	SO-8	C		$4.46
LT1374CS8-Sync#TRPBF	SO-8	C		$4.46
LT1374CS8#PBF	SO-8	C	$5.00	$4.40
LT1374CS8#TR	SO-8	C		$4.46
LT1374CS8#TRPBF	SO-8	C		$4.46
LT1374CT7	TO-220	C	$5.35	$4.60
LT1374CT7-5	TO-220	C	$5.35	$4.60
LT1374CT7-5#PBF	TO-220	C	$5.35	$4.60
LT1374CT7#PBF	TO-220	C	$5.35	$4.60
LT1374HVCFE	TSSOP-16	C	$5.92	$5.00
LT1374HVCFE#PBF	TSSOP-16	C	$5.92	$5.00
LT1374HVCFE#TR	TSSOP-16	C		$5.12
LT1374HVCFE#TRPBF	TSSOP-16	C		$5.12
LT1374HVCR	DDPAK-7	C	$6.15	$5.10
LT1374HVCR#PBF	DDPAK-7	C	$6.15	$5.10
LT1374HVCR#TR	DDPAK-7	C		$5.22
LT1374HVCR#TRPBF	DDPAK-7	C		$5.22
LT1374HVCS8	SO-8	C	$5.75	$4.85
LT1374HVCS8#PBF	SO-8	C	$5.75	$4.85
LT1374HVCS8#TR	SO-8	C		$4.91
LT1374HVCS8#TRPBF	SO-8	C		$4.91
LT1374HVIFE	TSSOP-16	I	$6.74	$5.70
LT1374HVIFE#PBF	TSSOP-16	I	$6.74	$5.70
LT1374HVIFE#TR	TSSOP-16	I		$5.82
LT1374HVIFE#TRPBF	TSSOP-16	I		$5.82
LT1374HVIR	DDPAK-7	I	$7.00	$5.90
LT1374HVIR#PBF	DDPAK-7	I	$7.00	$5.90
LT1374HVIR#TR	DDPAK-7	I		$6.02
LT1374HVIR#TRPBF	DDPAK-7	I		$6.02
LT1374HVIS8	SO-8	I	$6.60	$5.55
LT1374HVIS8#PBF	SO-8	I	$6.60	$5.55
LT1374HVIS8#TR	SO-8	I		$5.61
LT1374HVIS8#TRPBF	SO-8	I		$5.61
LT1374IFE	TSSOP-16	I	$6.15	$5.20
LT1374IFE#PBF	TSSOP-16	I	$6.15	$5.20
LT1374IFE#TR	TSSOP-16	I		$5.32
LT1374IFE#TRPBF	TSSOP-16	I		$5.32
LT1374IR	DDPAK-7	I	$6.30	$5.40
LT1374IR-5	DDPAK-7	I	$6.30	$5.40
LT1374IR-5#PBF	DDPAK-7	I	$6.30	$5.40
LT1374IR-5#TRPBF	DDPAK-7	I		$5.52
LT1374IR-5SYNC	DDPAK-7	I	$6.30	$5.40
LT1374IR-5SYNC#PBF	DDPAK-7	I	$6.30	$5.40
LT1374IR-SYNC	DDPAK-7	I	$6.30	$5.40
LT1374IR-SYNC#PBF	DDPAK-7	I	$6.30	$5.40
LT1374IR#PBF	DDPAK-7	I	$6.30	$5.40
LT1374IR#TRPBF	DDPAK-7	I		$5.52
LT1374IS8	SO-8	I	$5.75	$5.05
LT1374IS8-5	SO-8	I	$5.75	$5.05
LT1374IS8-5#PBF	SO-8	I	$5.75	$5.05
LT1374IS8-5#TR	SO-8	I		$5.11
LT1374IS8-5#TRPBF	SO-8	I		$5.11
LT1374IS8-5SYNC	SO-8	I	$5.75	$5.05
LT1374IS8-5SYNC#PBF	SO-8	I	$5.75	$5.05
LT1374IS8-SYNC	SO-8	I	$5.75	$5.05
LT1374IS8-SYNC#PBF	SO-8	I	$5.75	$5.05
LT1374IS8#PBF	SO-8	I	$5.75	$5.05
LT1374IS8#TR	SO-8	I		$5.11
LT1374IS8#TRPBF	SO-8	I		$5.11
LT1374IT7	TO-220	I	$6.15	$5.30
LT1374IT7-5	TO-220	I	$6.15	$5.30
LT1374IT7-5#PBF	TO-220	I	$6.15	$5.30
LT1374IT7#PBF	TO-220	I	$6.15	$5.30

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