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參數(shù)資料
| 型號(hào)： | CM2831NIM25 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 300mA CMOS LDO WITH ENABLE |
| 中文描述： | 300mA的CMOS LDO穩(wěn)壓器具有使能 |
| 文件頁數(shù)： | 6/12頁 |
| 文件大?。?/td> | 438K |
| 代理商： | CM2831NIM25 |
CM2831
300mA CMOS LDO W
ITH
E
NABLE
DETAILED DESCRIPTION
The CM2831 family of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current
protection, thermal shutdown, and short circuit protection.
The P-channel pass transistor receives data from the error amplifier, over-current shutdown, short output protection, and thermal
protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current
and Thermal shutdown circuits become active when the junction temperature exceeds 150
℃
, or the current exceeds 300mA.
During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops
below 120
℃
.
The CM2831 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents
over-stress. The CM2831 also incorporates current fold-back to reduce power dissipation when the output is short-circuited. This
feature becomes active when the output drops below 1.05V, and reduces the current flow by 65%. Full current is restored when
the voltage exceeds 0.95V.
ENABLE
The Enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shut off, and all internal circuits are
powered down. In this state, the quiescent current is less than 2μA. This pin behaves much like an electronic switch.
EXTERNAL CAPACITOR
The CM2831 is stable with an output capacitor to ground of 2.2μF or greater. It can keep stable even with higher or poor ESR
capacitors. A second capacitor is recommended between the input and ground to stabilize VIN. The input capacitor should be
larger than 0.1μF to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A “quiet” ground
termination is desirable.
2002/04/12
Rev. 3
Champion Microelectronic Corporation
Page 5
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CM2831OIM25 | 300mA CMOS LDO WITH ENABLE |
| CM2831PIM25 | 300mA CMOS LDO WITH ENABLE |
| CM2831SIM25 | 5 AMP SUBMINIATURE POWER RELAY |
| CM2831UIM25 | 300mA CMOS LDO WITH ENABLE |
| CM2831XIM25 | SWITCH |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CM2831OIM25 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:300mA CMOS LDO WITH ENABLE |
| CM2831PIM25 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:300mA CMOS LDO WITH ENABLE |
| CM2831SIM25 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:300mA CMOS LDO WITH ENABLE |
| CM2831UIM25 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:300mA CMOS LDO WITH ENABLE |
| CM2831VIM25 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:300mA CMOS LDO WITH ENABLE |
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