參數(shù)資料
型號(hào)： LP3906SQXPPXP
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： 2 A DUAL SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, QCC24
封裝： 5 X 4 MM, 0.80 MM HEIGHT, LLP-24
文件頁(yè)數(shù)： 28/40頁(yè)
文件大?。?/td> 4197K
代理商： LP3906SQXPPXP
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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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LP3906SQX-PPXP/NOPB 功能描述:其他電源管理 RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
LP3906SQX-TKXII/NOPB 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類(lèi)型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
LP3906SQX-VPFP/NOPB 功能描述:其他電源管理 RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
LP3907 制造商:INTERSIL 制造商全稱(chēng):Intersil Corporation 功能描述:Dual High-Current Step-Down DC/DC and Dual Linear Regulator with I2C Compatible Interface
LP3907QSQ-JJXP/NOPB 功能描述:上下轉(zhuǎn)換器 Dual Hi-Current SD DC/DC RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128
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