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参数资料
| 型号： | LP3906SQVPFP/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 2 A DUAL SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, QCC24 |
| 封装： | 5 X 4 MM, 0.80 MM HEIGHT, LLP-24 |
| 文件页数： | 10/40页 |
| 文件大小： | 4197K |
| 代理商： | LP3906SQVPFP/NOPB |
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POWER ON
EN_T assertion causes the LP3906 to emerge from Standby
mode to Full Operation mode at a preset timing sequence. By
default, the enables for the LDOs and Bucks are internally
pulled up, which causes the part to turn ON automatically. If
the user wishes to have a preset timing sequence to power
on the regulators, the external regulator enables must be tied
LOW. Otherwise, simply tie the enables of each specific reg-
ulator HIGH.
EN_T is edge triggered with rising edge signaling the chip to
power on. The EN_T input is deglitched and the default is set
at 1 ms. As shown in the next 2 diagrams, a rising EN_T edge
will start a power on sequence, while a falling EN_T edge will
start a shutdown sequence. If EN_T is high, toggling the ex-
ternal enables of the regulators will have no effect on the chip.
Default Power ON Sequence:
t
1 (ms)
t
2 (ms)
t
3 (ms)
t
4 (ms)
1.5
2.0
3
6
Note: LP3906 The default Power on delays can be reprogrammed at final
test or by using I2C registers to 1, 1.5, 2, 3, 6, or 11 ms.
The regulators can also be programmed through I2C to turn
on and off. By default, the I2C enables for the regulators are
ON.
The regulators are on following the pattern below:
Regulators on = (I2C enable) AND (External pin enable OR
EN_T high).
20197809
www.national.com
18
LP3906
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LP3906SQX-DJXI | 制造商:Texas Instruments 功能描述:Power Management Unit 24-Pin LLP EP T/R |
| LP3906SQX-DJXI/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 |
| LP3906SQX-FXPI/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 |
| LP3906SQX-JXXI/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 |
| LP3906SQX-PPXP/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 |
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