商品型号： MIC4575BT 库存编号： 78505 热门程度： 品牌： MICREL 外形封装： TO-220 生产批号： 95+ 起售数量： 100 参 考 价： 0755-88393056 存货数量： 1000 产品简述： 三极管 ,MIC4575BT 免费资料： 下载Datasheet

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MIC4575BT简介:Ordering Information
Part Number Voltage Temperature Range Package
MIC4575-3.3BT 3.3V –40°C to +85°C 5-lead TO-220
MIC4575-5.0BT 5.0V –40°C to +85°C 5-lead TO-220
MIC4575BT Adjustable –40°C to +85°C 5-lead TO-220
MIC4575-3.3BU 3.3V –40°C to +85°C 5-lead TO-263
MIC4575-5.0BU 5.0V –40°C to +85°C 5-lead TO-263
MIC4575BU Adjustable –40°C to +85°C 5-lead TO-263
General Description
The MIC4575 is a series of easy to use fixed and adjustable
BiCMOS step-down (buck) switch-mode voltage regulators.
The 200kHz MIC4575 duplicates the pinout and function of
the 52kHz LM2575. The higher switching frequency may
allow up to a 2:1 reduction in output filter inductor size.
The MIC4575 is available in 3.3V, and 5V fixed output
versions or a 1.23V to 20V adjustable output version. Both
versions are capable of driving a 1A load with excellent line
and load regulation.
The feedback voltage is guaranteed to ±2% tolerance for
adjustable versions, and the output voltage is guaranteed to
±3% for fixed versions, within specified voltages and load
conditions. The oscillator frequency is guaranteed to ±10%.
In shutdown mode, the regulator draws less than 200mA
standby current. The regulator performs cycle-by-cycle
current limiting and thermal shutdown for protection under
fault conditions.
This series of simple switch-mode regulators requires a
minimum number of external components and can operate
using a standard series of inductors. Frequency compensation
is provided internally.
The MIC4575 is available in TO-220 (T) and TO-263 (U)
packages for the industrial temperature range.
Features
• Fixed 200kHz operation
• 3.3V, 5V, and adjustable output versions
• Voltage over specified line and load conditions:
Fixed version: ±3% max. output voltage
Adjustable version: ±2% max. feedback voltage
• Guaranteed 1A switch current
• Wide 4V to 24V input voltage range
• Wide 1.23V to 20V output voltage range
• Requires minimum external components
• < 200mA typical shutdown mode
• 75% efficiency (adjustable version > 75% typical)
• Standard inductors and capacitors are
25% of typical LM2575 values.
• Thermal shutdown
• Overcurrent protection
• 100% electrical thermal limit burn-in
Applications
• Simple high-efficiency step-down (buck) regulator
• Efficient preregulator for linear regulators
• On-card switching regulators
• Positive-to-negative converter (inverting buck-boost)
• Battery Charger
• Negative boost converter
• Step-down 6V to 3.3V for Intel Pentium™
and similar microprocessors

MIC4575BT 时间:2007-6-7 16:08:00

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