參數(shù)資料
型號(hào)： LP2952A
廠商： National Semiconductor Corporation
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： 可調(diào)微功率低壓差穩(wěn)壓器
文件頁(yè)數(shù)： 12/22頁(yè)
文件大?。?/td> 1050K
代理商： LP2952A
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
LP2952 Adjustable Micropower Low-Dropout Voltage Regulators
LP2952I Adjustable Micropower Low-Dropout Voltage Regulators
LP2952I-3.3 Adjustable Micropower Low-Dropout Voltage Regulators
LP2954A 5V and Adjustable Micropower Low-Dropout Voltage Regulators
LP2954AISX 5V and Adjustable Micropower Low-Dropout Voltage Regulators
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LP2952AI 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Adjustable Micropower Low-Dropout Voltage Regulators
LP2952AI-3.3 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Adjustable Micropower Low-Dropout Voltage Regulators
LP2952AIM 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
LP2952AIM/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: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
LP2952AIM-3.3 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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