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參數(shù)資料
| 型號： | LP5996SD-2828 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Dual Linear Regulator with 300mA and 150mA Outputs |
| 中文描述： | DUAL OUTPUT, FIXED POSITIVE LDO REGULATOR, DSO10 |
| 封裝： | 3 X 3 MM, LLP-10 |
| 文件頁數(shù)： | 12/14頁 |
| 文件大?。?/td> | 750K |
| 代理商： | LP5996SD-2828 |
Application Hints
(Continued)
capacitor with an ESR value within the stable range, it would
have to be larger in capacitance (which means bigger and
more costly) than a ceramic capacitor with the same ESR
value. It should also be noted that the ESR of a typical
tantalum will increase about 2:1 as the temperature goes
from 25C down to -40C, so some guard band must be
allowed.
ENABLE CONTROL
The LP5996 features active high enable pins for each regu-
lator, EN1 and EN2, which turns the corresponding LDO off
when pulled low. The device outputs are enabled when the
enable pins are set to high. When not enabled the regulator
output is off and the device typically consumes 2nA.
If the application does not require the Enable switching
feature, one or both enable pins should be tied to V
IN
to keep
the regulator output permanently on.
To ensure proper operation, the signal source used to drive
the enable inputs must be able to swing above and below the
specified turn-on/off voltage thresholds listed in the Electrical
Characteristics section under V
IL
and V
IH
.
BYPASS CAPACITOR
The internal voltage reference circuit of the LP5996 is con-
nected to the C
pin via a high value internal resistor. An
external capacitor, connected to this pin, forms a low-pass
filter which reduces the noise level on both outputs of the
device. There is also some improvement in PSSR and line
transient performance. Internal circuitry ensures rapid charg-
ing of the C
capacitor during start-up.A10nF, high quality
ceramic capacitor with either NPO or COG dielectric is rec-
ommended due to their low leakage characteristics and low
noise performance.
SAFE AREA OF OPERATION
Due consideration should be given to operating conditions to
avoid excessive thermal dissipation of the LP5996 or trigger-
ing its thermal shutdown circuit. When both outputs are
enabled,
the
total
be P
+ P
D(LDO2)
where PD = (V
IN
- V
OUT
) x I
OUT
for
each LDO
In general, device options which have a large difference in
output voltage will dissipate more power with both outputs
enabled, due to the input voltage required for the higher
output voltage LDO. In such cases, especially at elevated
ambient temperature, it may not be possible to operate both
outputs at maximum current at the same time.
power
dissipation
will
L
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP5996SD-2828/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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP5996SD-2828EV | 功能描述:電源管理IC開發(fā)工具 LP5996SD-2828 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LP5996SD-3030 | 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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP5996SD-3030/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 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| LP5996SD-3030EV | 功能描述:電源管理IC開發(fā)工具 LP5996SD-3030 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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