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LT1074CT

厂商:
Linear
类别:
开关稳压器
包装:
-
封装:
TO-220
无铅情况/ROHS:
-
描述:
Step-Down Switching Regulator

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  • 参数
  • 描述
  • 文档
参数 数值
Number of Outputs 1
Vin Min (V) 7.3
Vin Max (V) 45
Output Current (A) 4.4
Vout Min (V) 2.21
Frequency (kHz) 100
Synchronous (yes/no) no
Packages DD-5, DD-7, T5, T7
Features -
Isupply (mA) 8.5
Ishutdown (uA) 140
Monolithic (yes/no) yes
Tracking (yes/no) no
Integrated Inductor (yes/no) no
Switch Current (A) 6.5
Topology Buck
Architecture Constant Frequency Current Mode
Vout Max (V) 35
Vout Maximum .85Vin
Frequency Adjust Range
Frequency Sync Range
Extended Temp C, I
Comments HV Version VIN to 60V, Programmable Current Limit
Featured no
Date Added 1984-01-01
Price 1k * $5.05 (LT1074CT)
New no

特点
5A Onboard Switch (LT1074)
Operates Up to 60V Input
100kHz Switching Frequency
Greatly Improved Dynamic Behavior
Available in Low Cost 5 and 7-Lead Packages
Only 8.5mA Quiescent Current
Programmable Current Limit
Micropower Shutdown Mode

典型应用

典型应用

描述
The LT?1074 is a 5A (LT1076 is rated at 2A) monolithic bipolar switching regulator which requires only a few external parts for normal operation. The power switch, all oscillator and control circuitry, and all current limit components,are included on the chip. The topology is a classic positive “buck” configuration but several design innovations allow this device to be used as a positive-to-negative converter, a negative boost converter, and as a flyback converter. The switch output is specified to swing 40V below ground, allowing the LT1074 to drive a tapped-inductor in the buck mode with output currents up to 10A.
The LT1074 uses a true analog multiplier in the feedback loop. This makes the device respond nearly instantaneously to input voltage fluctuations and makes loop gain independent of input voltage. As a result, dynamic behavior of the regulator is significantly improved over previous designs.
On-chip pulse by pulse current limiting makes the LT1074 nearly bust-proof for output overloads or shorts. The input voltage range as a buck converter is 8V to 60V, but a self-boot feature allows input voltages as low as 5V in the inverting and boost configurations.
The LT1074 is available in lowcost TO-220 or DD packages with frequency pre-set at 100kHz and current limit at 6.5A (LT1076 =2.6A). A 7-pin TO-220 package is also available which allows current limit to be adjusted down to zero. In addition, full micropower shutdown can be programmed. See Application Note 44 for design details.
A fixed 5V output, 2A version is also available. See LT1076-5.

数据表 (英文)
文档名称 文档类型 软件 描述
LT1074CTPDF下载 点击下载 点击下载 LTC3405A - 1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT
数据表 (中文)
文档名称 文档类型 软件 描述
LT1074CTPDF下载 点击下载 点击下载 LTC3405A - 1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT?
可靠性数据
文档名称 文档类型 软件 描述
LT1074CTPDF下载 点击下载 点击下载 R527 - Reliability Data