至
~阳onal
Semicondυctor
4
8
当
LMI0S/LM20S/LM305/LM30SA/LlVI376 稳压器
g
宝
概述
,
LMI05 系列是与 LMIOO 相似的正稳压器，除增加 ·波纹;申制 O.Ol%V
宝
宝
一个棚外的增益级以改进调节性能之外部与 LMI00 相 • 45mA 输出电流.~需外接旁路晶体管 (LM305A)
如同 LMI00 一样-这些稳压器也具有对负载电压
同.该系列重新设计的偏置电路排除了任何最小负载电
流的需求，并同时降低了辅助辑用电流，允许更高的电 瞩变及线路电压瞬变作快速响应的功能，因而随着负载
压下工作.该稳压器直接插入以取代在线性和野关稳压 的电阻性相电抗性变化不会引起振荡，以及对额定值范
器二者电路中输出电压大于 4.5V 的 LMIOO. 毒耍的电 围内的任何负载都能可靠启动的能力等特点.电路制作
在-个硅芯片主，并以 8 引线、 TO-5 管应封装或 1/4 英
路特性为 2
寸 X 1/4 英寸的金属扁平封装形式供货.
·输出电压从 4.5V 至 40V 可调
0
LMI05 规定工作在一 55 C运 TA 运+ 1250C~bM205
·如接外接晶体管可以使输出电流越过 lOA
搜走工作在一 25 0CζTA~+850C. 而 LM306 月.M305A
·负载调整率优于 O. 1 Yo.全负载具有电流限制
和 LM316 则规定工作在 OocζTAζ 十 10 C.
0
·直流线路电压调整率保证。 .03%/V
电路图和接线图
3
双列直播封装
未稳压输入
电流限制 i
'稳压输出
升压器输出
?
升压器输出 2
F 补偿
号李稳压输入 3
·原馈
电流限制
-基准旁路
地·
'稳压输出
合
TL/H/nSS-2
顶视图
补偿关闭
订货号 LM316N
见 NS 封装号 N08E
金属外壳封装
稳压输出
反馈
'基准旁路
•
顶视图
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订货号 LMl 05H , LM205H.
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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 removes 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 external 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 resistive 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
LM105/LM305/LM305A Voltage Regulators
June 1999
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
(Note 5)
Input Voltage
Input-Output Differential
Power Dissipation (Note 1)
Operating Temperature Range
Storage Temperature Range
Lead Temperature (Soldering, 10 seconds)
LM105
50V
40V
800 mW
−55˚C to +125˚C
−65˚C to +150˚C
300˚C
LM305
40V
40V
800 mW
0˚C to +70˚C
65˚C to +150˚C
300˚C
LM305A
50V
40V
800 mW
0˚C to +70˚C
−65˚C to +150˚C
300˚C
Electrical Characteristics (Note 2)
Parameter
Conditions
LM105
Min
Typ
LM305
Max
Min
Typ
LM305A
Max
Min
Typ
Units
Max
Input Voltage Range
8.5
50
8.5
40
8.5
50
V
Output Voltage Range
4.5
40
4.5
30
4.5
40
V
Input-Output Voltage
3.0
30
3.0
30
3.0
30
V
Differential
Load Regulation
(Note 3)
RSC = 10Ω, TA = 25˚C
RSC = 10Ω, TA = TA(MAX)
RSC = 10Ω, TA = TA(MIN)
0.02
0.05
0.02
0.05
%
0.03
0.1
0.03
0.1
%
0.03
0.1
0.03
0.1
%
0 ≤ IO ≤ 12 mA
0 ≤ IO ≤ 12 mA
RSC = 0Ω, TA = 25˚C
RSC = 0Ω, TA = 70˚C
RSC = 0Ω, TA = 0˚C
0.02
0.2
%
0.03
0.4
%
0.03
0.4
%
0 ≤ IO ≤ 45 mA
Line Regulation
TA = 25˚C
%/V
0˚C ≤ TA ≤ +70˚C
%/V
VIN − VOUT ≤ 5V, TA = 25˚C
VIN − VOUT ≥ 5V, TA = 25˚C
Temperature Stability
0.025
0.06
0.025
0.06
%/V
0.03
0.015
0.03
0.015
0.03
%/V
0.3
1.0
0.3
1.0
0.3
1.0
%
1.7
1.81 1.63
1.7
1.81 1.55
1.7
1.85
V
1.63
10 Hz ≤ f ≤ 10 kHz
CREF = 0
Standby Current Drain
CREF = 0.1 µF
VIN = 30V, TA = 25˚C
VIN = 40V
Current Limit
VIN = 50V
TA = 25˚C, RSC = 10Ω,
VOUT = 0V, (Note 4)
Sense Voltage
0.06
0.015
TA(MIN) ≤ TA ≤ TA(MAX)
Feedback Sense
Voltage
Output Noise Voltage
0.025
0.005
0.005
0.005
0.002
0.002
0.002
θJA
%
mA
0.8
225
Long Term Stability
Ripple Rejection
%
CREF = 10 µF, f = 120 Hz
TO-99 Board Mount
0.8
2.0
300
375
225
300
2.0
375
mA
225
0.8
2.0
mA
300
375
mV
0.1
0.1
0.1
%
0.003
0.003
0.003
%/V
230
230
230
˚C/W
92
92
92
˚C/W
25
25
25
˚C/W
in Still Air
θJA
TO-99 Board Mount in
400 LF/Min Air Flow
θJC
www.national.com
TO-99
2
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 kΩ. Load and line regulation specifications are for a constant junction temperature. Temperature 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
DS007755-16
DS007755-15
DS007755-17
Current Limit Sense Voltage
Short Circuit Current
Optimum Divider Resistance
Values
DS007755-19
DS007755-18
DS007755-20
Minimum Input Voltage
Regulator Dropout Voltage
DS007755-22
DS007755-21
3
Supply Voltage Rejection
DS007755-23
www.national.com
Typical Performance Characteristics
Minimum Output Voltage
(Continued)
Standby Current Drain
Transient Response
DS007755-25
DS007755-24
DS007755-26
Typical Applications
10A Regulator with Foldback Current Limiting
DS007755-4
†Solid tantalum.
*Electrolytic
1.0A Regulator with Protective Diodes
DS007755-5
†Protects against shorted input or inductive leads on unregulated supply.
*Protects against input voltage reversal.
††Protects against output voltage reversal.
www.national.com
4
Typical Applications
(Continued)
Current Regulator
Linear Regulator with Foldback Current Limiting
DS007755-8
DS007755-9
Shunt Regulator
DS007755-10
Switching Regulator
Basic Positive Regulator with Current Limiting
DS007755-11
DS007755-12
†Solid tantaium.
††125 turns = 22 on Arnold
Engineering A262123-2 molybdenum permally core.
5
www.national.com
Typical Applications
(Continued)
1.0A Regulator with Protective Diodes
DS007755-13
†Protects against shorted input or inductive loads on unregulated supply.
*Protects against input voltage reversal.
††Protects against output voltage reversal.
Linear Regulator with Foldback Current Limiting
DS007755-14
www.national.com
6
LM105/LM305/LM305A Voltage Regulators
Physical Dimensions
inches (millimeters) unless otherwise noted
Metal Can Package (H)
Order Number LM105H, LM105H/883, SMD #5962-8958801, LM305H or LM305AH
NS Package Number H08C
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This Material Copyrighted By Its Respective Manufacturer