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參數(shù)資料
| 型號： | LP2966IMM-2830 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Dual 150mA Ultra Low-Dropout Regulator |
| 中文描述： | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數(shù)： | 13/15頁 |
| 文件大?。?/td> | 456K |
| 代理商： | LP2966IMM-2830 |
Applications Information
(Continued)
The internal error flag comparators have open drain output
stages. Hence, the ERROR pins should be pulled high
through a pull up resistor. Although the ERROR pin can sink
current of 1mA, this current adds to the battery drain. Hence,
the value of the pull up resistor should be in the range of
100k
to 1M
.
The ERROR pins must be connected to
ground if this function is not used.
It should also be noted
that when the shutdown pins are pulled low, the ERROR pins
are forced to be invalid for reasons of saving power in shut-
down mode.
Shutdown Operation
The two LDO regulators in the LP2966 have independent
shutdown. A CMOS Logic level signal at the shutdown( SD)
pin will turn-off the corresponding regulator. Pins SD1 and
SD2 must be actively terminated through a 100k
pull-up re-
sistor for a proper operation. If these pins are driven from a
source that actively pulls high and low (such as a CMOS rail
to rail comparator), the pull-up resistor is not required. These
pins must be tied to Vin if not used.
Drop-Out Voltage
The drop-out voltage of a regulator is defined as the mini-
mum input-to-output differential required to stay within
100mV of the output voltage measured with a 1V differential.
The LP2966 uses an internal MOSFET with an Rds(on) of
1
. For CMOS LDOs, the drop-out voltage is the product of
the load current and the Rds(on) of the internal MOSFET.
Reverse Current Path
The internal MOSFET in the LP2966 has an inherent para-
sitic diode. During normal operation, the input voltage is
higher than the output voltage and the parasitic diode is re-
verse biased. However, if the output is pulled above the input
in an application, then current flows from the output to the in-
put as the parasitic diode gets forward biased. The output
can be pulled above the input as long as the current in the
parasitic diode is limited to 150mA.
Maximum Output Current Capability
Each output in the LP2966 can deliver a current of more than
150mA over the full operating temperature range. However,
the maximum output current capability should be derated by
the junction temperature. Under all possible conditions, the
junction temperature must be within the range specified un-
der operating conditions. The LP2966 is available in
MSOP-8 package. This package has a junction to ambient
temperature coefficient (
θ
) of 235 C/W with minimum
amount of copper area. The total power dissipation of the de-
vice is approximately given by:
P
D
= (V
in
- V
OUT1
)I
OUT1
+ (V
in
-V
OUT2
)I
OUT2
The maximum power dissipation, P
, that the device can
tolerate can be calculated by using the formula
P
Dmax
= (T
jmax
- T
A
)/
θ
ja
where T
is the maximum specified junction temperature
(125C), and T
A
is the ambient temperature.
The following figures show the variation of thermal coeffi-
cient with different layout scenarios.
DS100850-35
FIGURE 3. Error Flag Operation
L
www.national.com
13
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP2966IMM-2830/NOPB | 功能描述:IC REG LDO 2.8V/3V .15A 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:4V 輸入電壓:最高 16V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.28V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA 電流 - 限制（最小）:- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:5-VFBGA 供應(yīng)商設(shè)備封裝:5-uSMD 包裝:Digi-Reel® 其它名稱:LP2985AIBP-4.0DKR |
| LP2966IMM-3030 | 制造商:Texas Instruments 功能描述:2x150mA LDO Regulator,LP2966IMM-3030 |
| LP2966IMM-3030 | 制造商:Texas Instruments 功能描述:V REG LDO +3.0V SMD 2966 MSOP8 |
| LP2966IMM-3030/NOPB | 功能描述:IC REG LDO 3V .15A 8-MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:4V 輸入電壓:最高 16V 電壓 - 壓降（標(biāo)準(zhǔn)）:0.28V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:5-VFBGA 供應(yīng)商設(shè)備封裝:5-uSMD 包裝:Digi-Reel® 其它名稱:LP2985AIBP-4.0DKR |
| LP2966IMM-3325 | 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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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