ML7820FA [MICRO-ELECTRONICS]
3-TERMINAL POSITIVE VOLTAGE REGULATOR; 3端正电压稳压器型号: | ML7820FA |
厂家: | Micro Electronics |
描述: | 3-TERMINAL POSITIVE VOLTAGE REGULATOR |
文件: | 总11页 (文件大小:432K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
ML7800
SERIES
3-TERMINAL POSITIVE
VOLTAGE REGULATOR
The ML7800 series are 3-Terminal Positive Voltage Regulators. These regulators employ internal current-limiting, thermal-
shutdown and safe-area compensation, making them essentially indestructible. If adequate heat sinking is provided, they can
deliver over 1A output current (Please refer to the "thermal design" portion of application note). They are intended as fixed
voltage regulations in a wide range of applications including local (on-card) regulation for elimination of distributution
problems associated with single point regulation. In addition to use as fixed voltage regulators, these devices can be used with
external components to obtain adjustable output voltages and currents.
1. OUT
2. GND
3. IN
■ Package Outline
TO-220
TO-220F
3
2
1
(Ta=25℃)
ABSOLUTE MAXIMUM RATINGS
Maximum Rating
PARAMETER
SYMBOL
UNIT
ML7805 to ML7809
35
35
40
Input Voltage
VIN
V
ML7812 to ML7820
ML7824
-40 to +125
Storage Temperature Range
Tstg
PD
℃
℃
Operating Junction Temperature
-30 to +150
-30 to +75
Tj
Operating Temperature
Range
Operating Ambient Temperature
Topr
15(Tc≦70℃ )
Power Dissipation
W
THERMAL RESISTANCE
Junction-to-Ambient Temperature
Junction-to-Case
60
5
Θ ja
Θ jc
Thermal Resistance
℃/W
Measurement is to be conducted
in pulse testing.
(Tj=25℃,C1=0.33μF,Co=0.1μF)
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS
PARAMETER
SYMBOL
MIN. TYP. MAX. UNIT
ML7805A / ML7805FA
Output Voltage
Vo
IQ
VIN=10V
VIN=10V
VIN=10V
Io=0.5A
4.8
-
5.0
4.2
15
3
5.2
8.0
100
100
-
V
Quiescent Current
Load Regulation
Line Regulation
Ripple Rejection
Output Noise Voltage
Io=0mA
mA
mV
mV
dB
Io=0.005A to 1.5A
-
ΔVo Io
ΔVo Vin
RR
VIN=7 to 25V Io=0.5A
-
VIN=10V
VIN=10V
Io=0.5A
f=120Hz
Io=0.5A
62
-
78
40
ein=2Vp-p
BW=10Hz to 100KHz
VNO
-
μV
Average Temperature
Cofficient of Output Voltage
VIN=10V
Io=0.5A
-
-1.1
-
ΔVo / ΔT
mV/℃
REV B
Page 1 of 11
Measurement is to be conducted
in pulse testing.
(Tj=25℃,C1=0.33μF,Co=0.1μF)
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS
PARAMETER
SYMBOL
MIN. TYP. MAX. UNIT
ML7806A / ML7806FA
Output Voltage
Vo
IQ
VIN=11V
VIN=11V
VIN=11V
VIN=8 to 25V
VIN=11V
VIN=11V
Io=0.5A
5.75
6.0
4.3
15
5
6.25
8.0
120
120
-
V
Quiescent Current
Load Regulation
Line Regulation
Ripple Rejection
Output Noise Voltage
Io=0mA
-
-
mA
mV
mV
dB
Io=0.005A to 1.5A
Io=0.5A
ΔVo Io
ΔVo Vin
RR
-
Io=0.5A
f=120Hz
Io=0.5A
59
-
75
45
ein=2Vp-p
BW=10Hz to 100KHz
VNO
-
μV
Average Temperature
Cofficient of Output Voltage
VIN=11V
Io=5mA
-
-0.8
-
ΔVo / ΔT
mV/℃
ML7808A / ML7808FA
Output Voltage
Vo
IQ
VIN=14V
Io=0.5A
7.7
-
8.0
4.3
15
6
8.3
8.0
160
160
-
V
Quiescent Current
Load Regulation
Line Regulation
Ripple Rejection
Output Noise Voltage
VIN=14V
Io=0mA
mA
mV
mV
dB
Io=0.005A to 1.5A
Io=0.5A
VIN=14V
-
ΔVo Io
ΔVo Vin
RR
VIN=10.5 to 25V
VIN=14V
-
Io=0.5A
f=120Hz
Io=0.5A
55
-
72
52
ein=2Vp-p
BW=10Hz to 100KHz
VNO
VIN=14V
-
μV
Average Temperature
Cofficient of Output Voltage
VIN=14V
Io=5mA
-
-0.8
-
ΔVo / ΔT
mV/℃
ML7809A / ML7809FA
Output Voltage
Vo
IQ
VIN=15V
Io=0.5A
8.65
9.0
4.3
15
7
9.35
8.0
180
180
-
V
Quiescent Current
Load Regulation
Line Regulation
Ripple Rejection
Output Noise Voltage
VIN=15V
Io=0mA
-
-
mA
mV
mV
dB
Io=0.005A to 1.5A
Io=0.5A
VIN=15V
ΔVo Io
ΔVo Vin
RR
VIN=11.5 to 25V
VIN=15V
-
Io=0.5A
f=120Hz
Io=0.5A
55
-
70
60
ein=2Vp-p
BW=10Hz to 100KHz
VNO
VIN=15V
-
μV
Average Temperature
Cofficient of Output Voltage
VIN=15V
Io=5mA
-
-1
-
ΔVo / ΔT
mV/℃
ML7812A / ML7812FA
Output Voltage
Vo
IQ
VIN=19V
Io=0.5A
11.5
12.0
4.3
25
12.5
8.0
240
240
-
V
Quiescent Current
Load Regulation
Line Regulation
Ripple Rejection
Output Noise Voltage
VIN=19V
Io=0mA
-
-
mA
mV
mV
dB
Io=0.005A to 1.5A
Io=0.5A
VIN=19V
ΔVo Io
ΔVo Vin
RR
VIN=14.5 to 30V
VIN=19V
-
10
Io=0.5A
f=120Hz
Io=0.5A
55
-
71
ein=2Vp-p
BW=10Hz to 100KHz
VNO
VIN=19V
-
75
μV
Average Temperature
Cofficient of Output Voltage
VIN=19V
Io=5mA
-
-1
-
ΔVo / ΔT
mV/℃
REV B
Page 2 of 11
Measurement is to be conducted
in pulse testing.
(Tj=25℃,C1=0.33μF,Co=0.1μF)
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS
PARAMETER
SYMBOL
MIN. TYP. MAX. UNIT
ML7815A / ML7815FA
Output Voltage
Vo
IQ
VIN=23V
Io=0.5A
14.4
15.0
4.3
35
15.6
8.0
300
300
-
V
Quiescent Current
Load Regulation
Line Regulation
Ripple Rejection
Output Noise Voltage
VIN=23V
Io=0mA
-
-
mA
mV
mV
dB
Io=0.005A to 1.5A
Io=0.5A
VIN=23V
ΔVo Io
ΔVo Vin
RR
VIN=17.5 to 30V
-
12
VIN=23V
VIN=23V
Io=0.5A
BW=10Hz to 100KHz
f=120Hz
Io=0.5A
54
-
70
ein=2Vp-p
VNO
-
90
μV
Average Temperature
Cofficient of Output Voltage
VIN=23V
Io=5mA
-
-1
-
ΔVo / ΔT
mV/℃
ML7818A / ML7818FA
Output Voltage
Vo
IQ
VIN=27V
Io=0.5A
17.3
18.0
4.5
55
18.7
8.0
360
360
-
V
Quiescent Current
Load Regulation
Line Regulation
Ripple Rejection
Output Noise Voltage
VIN=27V
Io=0mA
-
-
mA
mV
mV
dB
Io=0.005A to 1.5A
VIN=27V
ΔVo Io
ΔVo Vin
RR
VIN=21 to 33V
VIN=27V
Io=0.5A
-
15
Io=0.5A
f=120Hz
Io=0.5A
53
-
69
ein=2Vp-p
BW=10Hz to 100KHz
Io=5mA
VNO
VIN=27V
-
110
μV
Average Temperature
Cofficient of Output Voltage
VIN=27V
-
-1
-
ΔVo / ΔT
mV/℃
ML7820A / ML7820FA
Output Voltage
Vo
IQ
VIN=29V
Io=0.5A
19.2
20.0
4.5
61
20.8
8.0
400
400
-
V
Quiescent Current
Load Regulation
Line Regulation
Ripple Rejection
Output Noise Voltage
VIN=29V
Io=0mA
-
-
mA
mV
mV
dB
Io=0.005A to 1.5A
Io=0.5A
VIN=29V
ΔVo Io
ΔVo Vin
RR
VIN=23 to 35V
VIN=29V
-
16
Io=0.5A
f=120Hz
Io=0.5A
51
-
66
ein=2Vp-p
BW=10Hz to 100KHz
VNO
VIN=29V
-
150
μV
Average Temperature
Cofficient of Output Voltage
VIN=29V
Io=5mA
-
-2.0
-
ΔVo / ΔT
mV/℃
ML7824A / ML7824FA
Output Voltage
Vo
IQ
VIN=33V
Io=0.5A
23.0
24.0
4.6
65
25.0
8.0
480
480
-
V
Quiescent Current
Load Regulation
Line Regulation
Ripple Rejection
Output Noise Voltage
VIN=33V
Io=0mA
-
-
mA
mV
mV
dB
Io=0.005A to 1.5A
Io=0.5A
VIN=33V
ΔVo Io
ΔVo Vin
RR
VIN=28 to 38V
VIN=33V
-
18
Io=0.5A
f=120Hz
Io=0.5A
50
-
66
ein=2Vp-p
BW=10Hz to 100KHz
VNO
VIN=33V
-
170
μV
Average Temperature
Cofficient of Output Voltage
VIN=33V
Io=5mA
-
-2.4
-
ΔVo / ΔT
mV/℃
REV B
Page 3 of 11
■ Power Dissipation vs. Ambient Temperature
■ Equivalent Circuit
■ Test Circuit
1. Output Voltage, Line Regulation, Load
2. Ripple Rejection
Regulation, Quiescent Current,
Average Temperature Coefficient of
Output Voltage, Output Noise Voltage.
ein = 2 Vp-p
f = 120Hz
ML7805
ML7805
IN
Io
IIN
1
3
1
3
IN
OUT
OUT
GND
GND
2
2
0.33uF
0.1uF
Vo, VN
VIN
0.33uF
0.1uF
VIN
Vo, eo
IQ
REV B
Page 4 of 11
■ Typical Characteristics
ML7805 / 15 / 24
ML7805 / 15 / 24
REV B
Page 5 of 11
■ Typical Characteristics
/24 Quiescent
REV B
Page 6 of 11
■ Typical Characteristics
REV B
Page 7 of 11
1. Application Circuit
In the following explain only the positive regulator unless otherwise specified. However they can apply to the
negative voltage regulator by easy change.
Positive/Negative Voltage Supply
Note : In the above positive and negative
power supply application, D1 and D2
should be connected. If D1 and D2
are not connected, either of positive
or negative power supply circuit may
not turns on.
78 series
IN
OUT
+Vo
+Vin
COM
-Vin
GND
0.33uF
0.33uF
D1
D2
0.1uF
0.1uF
COM
IN
OUT
-Vo
79 series
2. Note in Application Circuit
( 1 )
If the higher voltage (above the rated value) or lower voltage (GND-0.5V) is supplied to the input
terminals, the IC may be destroyed. To avoid such a case, a zener diode or other parts of the surge
supressor should be connected as shown below.
L
R
1
3
1
3
Vin
Vo
Vin
Vo
IN
OUT
IN
OUT
+
+
Zener Diode
Capacitor
Diode
Capacitor
( 2 )
If the higher voltage than the input terminal is supplied to the output terminal, the IC may be
destroyed. To avoid input terminal short to the GND or the stored voltage in the capacitor back to the
output terminal, by the large value capacitor connecting to the output terminal application, the SBD
should be required as shown below;
DIODE
1
3
Vin
Vo
IN
OUT
+
Capacitor
* In case of negative voltage regulator, reverse the SBD and capacitor direction.
REV B
Page 8 of 11
3. Thermal Design
( 1 )
Heat Producting
There are two kinds of heat producting (PLOSS-1, PLOSS-2) in three terminal regulator and the sum of
them is total heat producting of IC (PLOSS).
(1-1)
PLOSS-1 : heat producting by own operation
Input voltage (Vin) and quiescent current (IQ) produce the heat mentioned below equation.
PLOSS-1 = Vin X IQ
Iout
IN
OUT
Input
Output
GND
IQ
Vin
Vout
(1-2)
PLOSS-2 : heat producing by output current and the input-output differential voltage.
Internal power transistor produces the hest mentioned following equation.
PLOSS-2
= (Vin-Vout) x Iout
(W)
Therefore, the total heat producing PLOSS is :
PLOSS
= PLOSS-1 + PLOSS-2
= Vin X IQ + (Vin-Vout) X Iout
(W)
( 2 )
Thermal Resistance
(2-1)
Definition of Thermal Resistance : θ
Thermal resistance (θ ) is a degree of heat radiation mentioned following equation.
= (T1 - T2)/P (℃ /W) Heat Producing Quantity
Ambient Temperature or case temperature
: P (W)
:T2 (℃ )
:T1 (℃ )
Heat Source Temperature
P(W)
Rp
T1
T2
T1 > T2
(2-2)
Thermal resistance of TO-220
There are two kinds of thermal resistance of TO-220. One is "θjc" for the application with the heat
sink, the other is "θja" for the application without the heat sink.
thermal resistance between IC chip (junction point) and the package back side
contacting with the heat sink.
θjc :
thermal resistance between IC chip (junction point) and ambience.
θja :
REV B
Page 9 of 11
( 3 )
Heat Radiation Balance
The heat produced in the IC is radiated to ambience through the package and the heat
sink.
The quantity of the heat radiation depends on the heat source temperature, ambient
temperature and the thermal resistance of the package.
(3-1)
TO-220 with heat sink
Heat radiation balance model of the TO-220 with heat sink is shown as below.
θJC
θCH
θHS
PLOSS
Tj
θJS
Ta
Heat Source
(junction)
Ambient
Temperature
Temperature
Where
thermal resistance between IC chip (junction point) and the
package backside connecting to the heatsink.
θjc :
thermal resistance between IC chip (junction point) and the
package surface.
θjs :
θCH :
thermal resistance between package backside and the heat sink
including the condidtion of insulator, silicon grease and
tighten torque.
thermal resistance of the heat sink
θHS :
Package
Face Side
Resin
θJS
IC
Chip
θJC
Package
Back Side
θCH
θHS
Heat Sink
If the js is large enough compare with other thermal resistance, the js can be neglected and the
heat radiation model can be mentioned as below.
θJC
θCH
θHS
PLOSS
Tj
Ta
The relation between temperature and heat radiation quantity is shown below.
Tj=PLOSS X (θjc+θCH +θHS) + Ta (℃ )
REV B
Page 10 of 11
( 4 )
Thermal Design
The heat radiation balance model of the TO-220 with the heat sink is shown as follows.
Heat radiation balance
Tj = PLOSS X (θjc +θCH + θHS) + Ta
(℃ )
(4-1)
(4-2)
PLOSS = Vin X IQ + (Vin-Vout) X Iout
(W)
Substituting "Eq.(4-2) into "Eq.(4-1)" obtains
Tj = [Vin X IQ +(Vin-Vout) X Iout] X (θjc +θCH +θHS)+Ta
In Eq.(4-3)
(℃)
(4-3)
Vin, Iout, θCH, θHS, Ta depand on using condition.
Tj, IQ,Vout,θjc depend on IC depend on IC specification.
WhenθCH, IQ and Tj are assumed the following values,
Eq.(4-3) becomes Eq.(4-4).
Insert the mica paper (0.1t) and thermal conduction silicon grease between
the IC and heat sink and tighten them with the bolt by 4Kg*cm-min.
θCH=0.3 to 0.4 (℃/W)
IQ = 5 to 6mA (max.)
Tj = 125℃ (max.)
Tj(max) = 125 = [5 X Vin + (Vin-Vout) X Iout] X (5+0.3+θHS) +Ta
When fix the Vout, Tj depends on the Vin, Iout, θHS and Ta.
(℃)
(4-4)
It means;
Lower Vin and / or Iout are required to linit the temperature rise.
Smaller θHS is required for the effective heat reduce (i.e. using the large heat sink).
In the thermal design, when fix the Vin, Iout and Ta, selectthe heat sink which θHS is smaller that
the result of Eq.(4-4).
For more detail, please refer the heat resistance value mentioned in the specification of the heat sink
supplier.
REV B
Page 11 of 11
相关型号:
ML7820FA-FBE
Fixed Positive Standard Regulator, 20VBIPolar, PSFM3, ROHS COMPLIANT, TO-220F, 3 PIN
MICRO-ELECTRO
ML7824A-FBE
Fixed Positive Standard Regulator, 24VBIPolar, PSFM3, ROHS COMPLIANT, TO-220, 3 PIN
MICRO-ELECTRO
ML7824FA-FBE
Fixed Positive Standard Regulator, 24VBIPolar, PSFM3, ROHS COMPLIANT, TO-220F, 3 PIN
MICRO-ELECTRO
©2020 ICPDF网 联系我们和版权申明