没有合适的资源?快使用搜索试试~ 我知道了~
7805稳压电路、7905稳压电路、7815稳压电路
4星 · 超过85%的资源 需积分: 50 86 下载量 138 浏览量
2009-10-11
21:08:20
上传
评论 3
收藏 263KB PDF 举报
温馨提示
试读
12页
5V稳压电路大全。。现在市场上卖稳压管时,通常不标型号,而是直接标电压值。买时要注意的是同为12V,但功率有多种(即稳压时,流过的电流范围不同)。象电话机中,主要用3.9V、12V、27V这几种,功率为1/4W。
资源推荐
资源详情
资源评论
LM78LXX Series
3-Terminal Positive Regulators
General Description
The LM78LXX series of three terminal positive regulators is
available with several fixed output voltages making them
useful in a wide range of applications. When used as a zener
diode/resistor combination replacement, the LM78LXX usu-
ally results in an effective output impedance improvement of
two orders of magnitude, and lower quiescent current. These
regulators can provide local on card regulation, eliminating
the distribution problems associated with single point regula-
tion. The voltages available allow the LM78LXX to be used in
logic systems, instrumentation, HiFi, and other solid state
electronic equipment.
The LM78LXX is available in the plastic TO-92 (Z) package,
the plastic SO-8 (M) package and a chip sized package
(8-Bump micro SMD) using National’s micro SMD package
technology. With adequate heat sinking the regulator can de-
liver 100 mA output current. Current limiting is included to
limit the peak output current to a safe value. Safe area pro-
tection for the output transistors is provided to limit internal
power dissipation. If internal power dissipation becomes too
high for the heat sinking provided, the thermal shutdown cir-
cuit takes over preventing the IC from overheating.
Features
n LM78L05 in micro SMD package
n Output voltage tolerances of
±
5
%
over the temperature
range
n Output current of 100 mA
n Internal thermal overload protection
n Output transistor safe area protection
n Internal short circuit current limit
n Available in plastic TO-92 and plastic SO-8 low profile
packages
n No external components
n Output voltages of 5.0V, 6.2V, 8.2V, 9.0V, 12V, 15V
Connection Diagrams
SO-8 Plastic (M)
(Narrow Body)
DS007744-2
Top View
8-Bump micro SMD
DS007744-24
Top View
(Bump Side Down)
(TO-92)
Plastic Package (Z)
DS007744-3
Bottom View
micro SMD Marking Orientation
DS007744-33
Top View
January 2000
LM78LXX Series 3-Terminal Positive Regulators
© 2000 National Semiconductor Corporation DS007744 www.national.com
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Power Dissipation (Note 5) Internally Limited
Input Voltage 35V
Storage Temperature −65˚C to +150˚C
Operating Junction Temperature
SO-8 0˚C to 125˚C
micro SMD −40˚C to 85˚C
Soldering Information
Infrared or Convection (20 sec.) 235˚C
Wave Soldering (10 sec.) 260˚C (lead time)
ESD Susceptibility (Note 2) 1kV
LM78LXX Electrical Characteristics Limits in standard typeface are for T
J
=
25˚C, Bold typeface ap-
plies over 0˚C to 125˚C for SO-8 package and −40˚C to 85˚C for micro SMD package. Limits are guaranteed by produc-
tion testing or correlation techniques using standard Statistical Quality Control (SQC) methods. Unless otherwise specified: I
O
=
40 mA, C
I
=
0.33 µF, C
O
=
0.1 µF.
LM78L05
Unless otherwise specified, V
IN
=
10V
Symbol Parameter Conditions Min Typ Max Units
V
O
Output Voltage 4.8 5 5.2
V
7V ≤ V
IN
≤ 20V
1mA≤I
O
≤40 mA
(Note 3)
4.75 5.25
1mA≤I
O
≤70 mA
(Note 3)
4.75 5.25
∆V
O
Line Regulation 7V ≤ V
IN
≤ 20V 18 75
mV
8V ≤ V
IN
≤ 20V 10 54
∆V
O
Load Regulation 1 mA ≤ I
O
≤ 100 mA 20 60
1mA≤I
O
≤40 mA 5 30
I
Q
Quiescent Current 3 5
mA∆I
Q
Quiescent Current Change 8V ≤ V
IN
≤ 20V 1.0
1mA≤I
O
≤40 mA 0.1
V
n
Output Noise Voltage f
=
10 Hz to 100 kHz
(Note 4)
40 µV
Ripple Rejection f
=
120 Hz
8V ≤ V
IN
≤ 16V
47 62 dB
I
PK
Peak Output Current 140 mA
Average Output Voltage Tempco I
O
=
5mA
−0.65 mV/˚C
V
IN
(Min) Minimum Value of Input Voltage
Required to Maintain Line Regulation
6.7 7 V
θ
JA
Thermal Resistance
(8-Bump micro SMD)
230.9 ˚C/W
LM78L62AC
Unless otherwise specified, V
IN
=
12V
Symbol Parameter Conditions Min Typ Max Units
V
O
Output Voltage 5.95 6.2 6.45
V
8.5V ≤ V
IN
≤ 20V
1mA≤I
O
≤40 mA
(Note 3)
5.9 6.5
1mA≤I
O
≤70 mA
(Note 3)
5.9 6.5
∆V
O
Line Regulation 8.5V ≤ V
IN
≤ 20V 65 175
mV
9V ≤ V
IN
≤ 20V 55 125
∆V
O
Load Regulation 1 mA ≤ I
O
≤ 100 mA 13 80
1mA≤I
O
≤40 mA 6 40
LM78LXX Series
www.national.com 2
LM78L62AC (Continued)
Unless otherwise specified, V
IN
=
12V
Symbol Parameter Conditions Min Typ Max Units
I
Q
Quiescent Current 2 5.5
mA∆I
Q
Quiescent Current Change 8V ≤ V
IN
≤ 20V 1.5
1mA≤I
O
≤40 mA 0.1
V
n
Output Noise Voltage f
=
10 Hz to 100 kHz
(Note 4)
50 µV
Ripple Rejection f
=
120 Hz
10V ≤ V
IN
≤ 20V
40 46 dB
I
PK
Peak Output Current 140 mA
Average Output Voltage Tempco I
O
=
5mA
−0.75 mV/˚C
V
IN
(Min) Minimum Value of Input Voltage
Required to Maintain Line Regulation
7.9 V
LM78L82AC
Unless otherwise specified, V
IN
=
14V
Symbol Parameter Conditions Min Typ Max Units
V
O
Output Voltage 7.87 8.2 8.53
V
11V ≤ V
IN
≤ 23V
1mA≤I
O
≤40 mA
(Note 3)
7.8 8.6
1mA≤I
O
≤70 mA
(Note 3)
7.8 8.6
∆V
O
Line Regulation 11V ≤ V
IN
≤ 23V 80 175
mV
12V ≤ V
IN
≤ 23V 70 125
∆V
O
Load Regulation 1 mA ≤ I
O
≤ 100 mA 15 80
1mA≤I
O
≤40 mA 8 40
I
Q
Quiescent Current 2 5.5
mA∆I
Q
Quiescent Current Change 12V ≤ V
IN
≤ 23V 1.5
1mA≤I
O
≤40 mA 0.1
V
n
Output Noise Voltage f
=
10 Hz to 100 kHz
(Note 4)
60 µV
Ripple Rejection f
=
120 Hz
12V ≤ V
IN
≤ 22V
39 45 dB
I
PK
Peak Output Current 140 mA
Average Output Voltage Tempco I
O
=
5mA
−0.8 mV/˚C
V
IN
(Min) Minimum Value of Input Voltage
Required to Maintain Line Regulation
9.9 V
LM78L09AC
Unless otherwise specified, V
IN
=
15V
Symbol Parameter Conditions Min Typ Max Units
V
O
Output Voltage 8.64 9.0 9.36
V
11.5V ≤ V
IN
≤ 24V
1mA≤I
O
≤40 mA
(Note 3)
8.55 9.45
1mA≤I
O
≤70 mA
(Note 3)
8.55 9.45
LM78LXX Series
www.national.com3
剩余11页未读,继续阅读
资源评论
- lufei12112013-03-05作为常用的稳压电路,普通用法,好。
- sunying5222013-04-27资料还比较全,挺有用的
saycio
- 粉丝: 1
- 资源: 3
上传资源 快速赚钱
- 我的内容管理 展开
- 我的资源 快来上传第一个资源
- 我的收益 登录查看自己的收益
- 我的积分 登录查看自己的积分
- 我的C币 登录后查看C币余额
- 我的收藏
- 我的下载
- 下载帮助
安全验证
文档复制为VIP权益,开通VIP直接复制
信息提交成功