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LM305AH の電気的特性と機能

LM305AHのメーカーはNational Semiconductorです、この部品の機能は「Voltage Regulators」です。


製品の詳細 ( Datasheet PDF )

部品番号 LM305AH
部品説明 Voltage Regulators
メーカ National Semiconductor
ロゴ National Semiconductor ロゴ 




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LM305AH Datasheet, LM305AH PDF,ピン配置, 機能
June 1999
LM105/LM305/LM305A
Voltage Regulators
General Description
The LM105 series are positive voltage regulators similar to
the LM100, except that an extra gain stage has been added
for improved regulation. A redesign of the biasing circuitry re-
moves any minimum load current requirement and at the
same time reduces standby current drain, permitting higher
voltage operation. They are direct, plug-in replacements for
the LM100 in both linear and switching regulator circuits with
output voltages greater than 4.5V. Important characteristics
of the circuits are:
Output voltage adjustable from 4.5V to 40V
Output currents in excess of 10A possible by adding ex-
ternal transistors
Load regulation better than 0.1%, full load with current
limiting
DC line regulation guaranteed at 0.03%/V
Ripple rejection on 0.01%V
45 mA output current without external pass transistor
(LM305A)
Like the LM100, they also feature fast response to both load
and line transients, freedom from oscillations with varying re-
sistive and reactive loads and the ability to start reliably on
any load within rating. The circuits are built on a single silicon
chip and are supplied in a TO-99 metal can.
The LM105 is specified for operation for −55˚C TA
+125˚C, and the LM305/LM305A is specified for 0˚C TA
+70˚C.
Schematic and Connection Diagrams
Metal Can Package
DS007755-3
Top View
Order Number LM105H, LM105H/883,
SMD #5962-8958801, LM305H or LM305AH
See NS Package Number H08C
DS007755-1
© 1999 National Semiconductor Corporation DS007755
www.national.com

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LM305AH pdf, ピン配列
Electrical Characteristics (Note 2) (Continued)
Note 1: The maximum junction temperature of the LM105 and LM305A is 150˚C, and the LM305 is 85˚C. For operation at elevated temperatures, devices in the
H08C package must be derated based on a thermal resistance of 168˚C/W junction to ambient, or 25˚C/W junction to case. Peak dissipations to 1W are allowable
providing the dissipation rating is not exceeded with the power average over a five second interval for the LM105 and averaged over a two second interval for the
LM305.
Note 2: Unless otherwise specified, these specifications apply for temperatures within the operating temperature range, for input and output voltages within the
range given, and for a divider impedance seen by the feedback terminal of 2 k. Load and line regulation specifications are for a constant junction temperature. Tem-
perature drift effects must be taken into account separately when the unit is operating under conditions of high dissipation.
Note 3: The output currents given, as well as the load regulation, can be increased by the addition of external transistors. The improvement factor will be roughly
equal to the composite current gain of the added transistors.
Note 4: With no external pass transistor.
Note 5: Refer to RETS105X Drawing for military specifications for the LM105.
Typical Performance Characteristics
Load Regulation
Load Regulation
Current Limiting
Characteristics
DS007755-15
Current Limit Sense Voltage
DS007755-16
Short Circuit Current
DS007755-17
Optimum Divider Resistance
Values
DS007755-18
Minimum Input Voltage
DS007755-19
Regulator Dropout Voltage
DS007755-20
Supply Voltage Rejection
DS007755-21
DS007755-22
3
DS007755-23
www.national.com


3Pages


LM305AH 電子部品, 半導体
Typical Applications (Continued)
1.0A Regulator with Protective Diodes
Protects against shorted input or inductive loads on unregulated supply.
*Protects against input voltage reversal.
††Protects against output voltage reversal.
DS007755-13
Linear Regulator with Foldback Current Limiting
DS007755-14
www.national.com
6

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共有リンク

Link :


部品番号部品説明メーカ
LM305A

Voltage Regulators

National Semiconductor
National Semiconductor
LM305A

LM105/LM305/LM305A Voltage Regulators (Rev. D)

Texas Instruments
Texas Instruments
LM305AH

Voltage Regulators

National Semiconductor
National Semiconductor


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