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부품번호 | MT1119 기능 |
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기능 | 500mA Positive Voltage Regulators | ||
제조업체 | Matrix Microtech | ||
로고 | |||
전체 7 페이지수
DESCRIPTION
MT1119
500mA Positive Voltage Regulators
The MT1119 series of high performance low dropout voltage regulators are designed for applications that
require efficient conversion and fast transient response.
Standard voltage versions are 1.8V, 2.5V, and 3.3V. Beside, MT1119 comes in a miniature 3-pin SOT-89
package.
FEATURES
APPLICATIONS
¾ Low Dropout Performance
¾ Guaranteed 500mA Output Current
¾ Wide Input Supply Voltage Range
¾ Over-temperature and Over-current Protection
¾ Rugged 3KV ESD withstand capability
¾ PC-Camera
¾ Active SCSI Terminators
¾ High Efficiency Linear Regulators
¾ Motherboard Clock Supplies
PIN CONFIGURATIONS
SOT-89 (Top View)
MT11191-X.XJ 1:OUT, 2:GND 3:IN
MT11192-X.XJ 1:GND, 2:IN, 3:OUT
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TYPICAL APPLICATIONS
MT1119
500mA Positive Voltage Regulators
APPLICATION NOTE
Application Hints
Like any linear voltage regulator, MT1119 requires external capacitors to ensure stability. The external
capacitors must be carefully selected to ensure performance.
Input Capacitor
An input capacitor of at least 10µF is required. Ceramic or Tantalum can be used. The value can be
increase without upper limit.
Output Capacitor
An output capacitor is required for stability. It must be placed no more than 1 cm away from the VOUT pin,
and connected directly between VOUT and GND pins. The minimum value is 22µF but may be increase without
limit.
Thermal Considerations
It is important that the thermal limit of the package is not exceeded. The MT1119 has built-in thermal
protection. When the thermal limit is exceeded, the IC will enter protection, and VOUT will be pulled to ground.
The power dissipation for a given application can be calculated as following:
The power dissipation is PD = IOUT * [(VIN – VOUT]
The thermal limit of the package is then limited to PD (MAX) = [TJ – TA]/ΘJA where TJ is the junction
temperature, TA is the ambient temperature, and ΘJA is around 150°C/W for MT1119. MT1119 is designed to
enter thermal protection at 175°C. For example, if TA is 25°C then the maximum PD is limited to about 1.0W. In
other words, if IOUT (MAX) = 500mA, then [VIN – VOUT] can not exceed 2.0V.
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4페이지 MT1119
500mA Positive Voltage Regulators
版本
Rev.
V.1.00
日期
Date
2008/8/15
撰寫者
Originator
cedric
修改/增加/刪除內容敘述
Description
建立
核准
Approved
-7-
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다운로드 | [ MT1119.PDF 데이터시트 ] |
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