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參數(shù)資料
| 型號(hào)： | LP2952IN |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Adjustable Micropower Low-Dropout Voltage Regulators |
| 中文描述： | FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, 0.8 V DROPOUT, PDIP14 |
| 封裝： | PLASTIC, DIP-14 |
| 文件頁數(shù)： | 12/22頁 |
| 文件大?。?/td> | 1050K |
| 代理商： | LP2952IN |
Schematic Diagram
01112706
Application Hints
HEATSINK REQUIREMENTS (Industrial Temperature
Range Devices)
The maximum allowable power dissipation for the LP2952/
LP2953 is limited by the maximum junction temperature
(+125C) and the external factors that determine how quickly
heat flows away from the part: the
ambient temperature
and
the
junction-to-ambient thermal resistance
for the specific
application.
The industrial temperature range (40C
≤
T
≤
+125C)
parts are manufactured in plastic DIP and surface mount
packages which contain a copper lead frame that allows
heat to be effectively conducted away from the die, through
the ground pins of the IC, and into the copper of the PC
board. Details on heatsinking using PC board copper are
covered later.
To determine if a heatsink is required, the maximum power
dissipated by the regulator, P(max), must be calculated. It is
important to remember that if the regulator is powered from
a transformer connected to the AC line, the
maximum
specified AC input voltage
must be used (since this pro-
duces the maximum DC input voltage to the regulator).
Figure 1
shows the voltages and currents which are present
in the circuit. The formula for calculating the power dissi-
pated in the regulator is also shown in
Figure 1
:
L
www.national.com
12
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LP2952AI-3.3 | Adjustable Micropower Low-Dropout Voltage Regulators |
| LP2952AI | Adjustable Micropower Low-Dropout Voltage Regulators |
| LP2952A | Adjustable Micropower Low-Dropout Voltage Regulators |
| LP2952 | Adjustable Micropower Low-Dropout Voltage Regulators |
| LP2952I | Adjustable Micropower Low-Dropout Voltage Regulators |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP2952IN | 制造商:Texas Instruments 功能描述:V REG LDO ADJ +1.23/29V 2952 DIP |
| LP2952IN/NOPB | 制造商:Texas Instruments 功能描述:LDO Regulator Pos 1.23V to 29V 0.25A 14-Pin PDIP Rail |
| LP2952IN-3.3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LP2952IN-3.3/NOPB | 功能描述:IC REG LDO 3.3V .25A 14-DIP 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 |
| LP2953 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Adjustable Micropower Low-Dropout Voltage Regulators |
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