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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： | 28/40页 |
| 文件大小： | 4197K |
| 代理商： | LP3906SQVPFP/NOPB |
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Note that the output voltage ripple is dependent on the induc-
tor current ripple and the equivalent series resistance of the
output capacitor (R
ESR). The RESR is frequency dependent as
well as temperature dependent. The R
ESR should be calcu-
lated with the applicable switching frequency and ambient
temperature.
Capacitor
Min
Value
Unit
Description
Recommended
Type
C
LDO1
0.47
F
LDO1 output
capacitor
Ceramic, 6.3V,
X5R
C
LDO2
0.47
F
LDO2 output
capacitor
Ceramic, 6.3V,
X5R
C
SW1
10.0
F
SW1 output
capacitor
Ceramic, 6.3V,
X5R
C
SW2
10.0
F
SW2 output
capacitor
Ceramic, 6.3V,
X5R
I2C Pullup Resistor
Both I2C_SDA and I2C_SCL terminals need to have pullup
resistors connected to VINLDO12 or to the power supply of
the I2C master. The values of the pull-up resistors (typ.
1.8k) are determined by the capacitance of the bus. Too
large of a resistor combined with a given bus capacitance will
result in a rise time that would violate the max. rise time spec-
ification. A too small resistor will result in a contention with the
pull-down transistor on either slave(s) or master.
Operation without I2C Interface
Operation of the LP3906 without the I2C interface is possible
if the system can operate with default values for the LDO and
Buck regulators. (Read below: Factory programmable op-
tions). The I2C-less system must rely on the correct default
output values of the LDO and Buck converters.
Factory Programmable Options
The following options are EPROM programmed during final
test of the LP3906. The system designer that needs specific
options is advised to contact the local National Semiconduc-
tor sales office.
Factory programmable options
Current value
Enable delay for power on
code 010 (see
Control 1 register
section)
SW1 ramp speed
8 mV/s
SW2 ramp speed
8 mV/s
The I2C Chip ID address is offered as a metal mask option.
The current value equals 0x60.
www.national.com
34
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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