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| 型号： | LP3907SQX-JIXI |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A DUAL SWITCHING CONTROLLER, 2100 kHz SWITCHING FREQ-MAX, QCC24 |
| 封装： | 4 X 4 MM, 0.8 MM HEIGHT, LLP-24 |
| 文件页数： | 17/44页 |
| 文件大小： | 3058K |
| 代理商： | LP3907SQX-JIXI |
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Faults Occurring in Counter Delay After Startup
30017881
The above timing diagram details the Power good with delay
with respect to the enable signals EN1, and EN2. The RDY1,
RDY2 are internal signals derived from the output of two com-
parators. Each comparator has been trimmed as follows:
Comparator Level
Buck Supply Level
HIGH
Greater than 94%
LOW
Less than 85%
The circuits for EN1 and RDY1 is symmetrical to EN2 and
RDY2, so each reference to EN1 and RDY1 will also work for
EN2 and RDY2 and vice versa.
If EN1 and RDY1 signals are High at time t1, then the RDY1
signal rising edge triggers the programmable delay counter
(50
μs, 50ms, 100ms, 200ms). This delay forces nPOR LOW
between time interval t1 and t2. nPOR is then pulled high after
the programmable delay is completed. Now if EN2 and RDY2
are initiated during this interval the nPOR signal ignores this
event.
If either RDY1or RDY2 were to go LOW at t3 then the pro-
grammable delay is triggered again.
www.national.com
24
LP3907
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LP3907SQX-JXQX | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface |
| LP3907SQX-JXQX/NOPB | 功能描述:其他电源管理 RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| LP3907SQX-PFX6W/NOPB | 功能描述:低压差稳压器 - LDO 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 |
| LP3907SQX-PJXIX/NOPB | 功能描述:低压差稳压器 - LDO 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 |
| LP3907SQX-PXPP | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface |
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