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参数资料
| 型号： | LP2981-50YEQR |
| 厂商： | Texas Instruments, Inc. |
| 英文描述： | 100-MA ULTRA DROPOUT REGULATOR WITH SHUTDOWN |
| 中文描述： | 100马超差稳压器具有关断 |
| 文件页数： | 14/20页 |
| 文件大小： | 346K |
| 代理商： | LP2981-50YEQR |
SLVS521B JULY 2004 REVISED OCTOBER 2004
14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
reverse input-output voltage
An inherent diode is present across the PNP pass element of the LP2981.
VOUT
VIN
With the anode connected to the output, this diode is reverse biased during normal operation, since the input
voltage is higher than the output. However, if the output is pulled one V
BE
higher than the input, or if the input
is abruptly stepped below the output, this diode is forward biased and can cause a parasitic silicon-controlled
rectifier (SCR) to latch, resulting in current flowing from the output to the input (values in excess of 100 mA can
cause damage). Thus, to prevent possible damage to the regulator in any application where the output may be
pulled above the input, an external Schottky diode must be connected between the output and input. With the
anode on output, this Schottky limits the reverse voltage across the output and input pins to 0.3 V, preventing
the regulator’s internal diode from forward biasing.
VOUT
VIN
Schottky
LP2981
pin 4: NC
Pin 4 must be left OPEN. Do not connect anything to this pin, as it is used for post package trim.
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| LP2981A-18YZQR | Circular Connector; Body Material:Aluminum; Series:PT06; Number of Contacts:19; Connector Shell Size:14; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Circular Contact Gender:Socket; Insert Arrangement:14-19 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LP2981A-28DBVR | 功能描述:低压差稳压器 - LDO 100-mA 0.75% Tolerance RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| LP2981A-28DBVRE4 | 功能描述:低压差稳压器 - LDO 100-mA 0.75% Tolerance RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| LP2981A-28DBVRG4 | 功能描述:低压差稳压器 - LDO Sgl Output 100mA Fixed(2.8V) Shutdown RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| LP2981A-28DBVT | 功能描述:低压差稳压器 - LDO 100-mA 0.75% Tolerance RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| LP2981A-28DBVTE4 | 功能描述:低压差稳压器 - LDO 100-mA 0.75% Tolerance RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
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