Transcript
MC78L05 3-TERMINAL 100mA POSITIVE VOLTAGE REGULATOR PIN CONFIGURATION
DESCRIPTION MC78L05 is a low current positive voltage regulator. It is designed for a wide range of applications.
1 2 3
These applications include on-card regulation for elimination of noise and distribution problems associated with singlepoint regulation. In addition, it can be used with power-pass elements to make high current voltage regulators. Each of these regulators can deliver up to 100mA output current.
1.Input 2.Ground 3.Output TO-92 (Top View)
The internal limiting and thermal shutdown features of this regulator makes it essentially immune to overload. When used as a replacement for a zener diode-resistor combination, an effective improvement in output impedance can be obtained together with lower-bias current.
VOUT
1
VIN
8
GND 2
7 GND
GND 3
6 GND
NC
FEATURES
4
5
NC
SOP-8L (Top View)
Output current up to 100mA No external components required Internal short circuit current limiting Internal thermal overload protection Output voltage offered in 5% tolerance Output voltage: 5V Pb-Free package
APPLICATION Current regulator Adjustable output regulator Short circuit protection
ORDERING INFORMATION Temperature Range 0°C to +70°C
Package SOP-8L TO-92
Pb-Free
July. 2007 Rev 1.0
1
Orderable Device
Package Qty
MC78L05D
75Units/Tube
MC78L05LP
50Units/Tube
MC78L05 SCHEMATIC DIAGRAM INPUT
OUTPUT
Series Pass Element
1 Current Generator
Starting Circuit
3
SOA Protection
Reference Voltage
Error Amplifier Thermal Protection GND 2
Figure 1. Simplified Block Diagram
ABSOLUTE MAXIMUM RATINGS Parameter
Symbol
Value
Unit
Input Voltage(DC)
VI
30
V
Power Dissipation
PD
Internally limited
Maximum Operating Junction Temperature
TJ
+150
°C
Operating Ambient Temperature Storage Temperature
TA
0 to +70
°C
TSTG
°C
-65 to +150
Soldering Temperature, 10 sec TL 260 Maximum Ratings are those values beyond which damage to the device may occur.
°C
RECOMMENDED OPERATING CONDITIONS Symbol
Min
Max
Unit
Input Voltage
VI
7
20
V
Output Current
IO
100
mA
Operating Virtual Junction Temperature
TJ
Parameter
0
+125
Functional operation should be restricted to the Recommended Operating Conditions.
July. 2007
Rev 1.0
2
R
C
MC78L05 ELECTRICAL CHARACTERISTICS (VI =10V, IO=40mA, CI=0.33μF, CO=0.1μFˈ0°C< TJ<+125°C, unless otherwise noted) Parameter
Symbol
Test Conditions(Note 1)
Min Typ
Max
4.8 5.0
5.2
1mA≤I O ≤40A, 7V≤V I ≤20V
4.75 5.0
5.25
1mA≤I O ≤70mA
4.75 5.0
5.25
7V≤V I ≤20V
32
150
8V≤V I ≤20V
26
100
1mA≤Io≤100mA
15
60
1mA≤Io≤40mA
8 3.8
30 6
T J =25°C Output Voltage(Note 2)
Line Regulation
Load Regulation
VO
ΔVO
ΔVO
T J =25°C
T J =25°C T J =25°C
Bias Current Bias Current Change
IB ΔIB
T J =125°C
5.5
8V≤V I ≤20V
1.5
1mA≤Io≤40mA
0.1
Output Noise Voltage
Vn
T J =25°C 10Hz≤f≤100kHz
Ripple Rejection
RR
T J =25°C
Dropout Voltage
VD
T J =25°C
f=120Hz, 8V≤V I ≤18V
41
Unit
V
mV
mV
mA mA
42
μV
49
dB
1.7
V
Notes: 1. Pulse testing techniques are used to maintain the junction temperature as close to the ambient temperature as possible. Thermal effects must be taken into account separately. 2. This specification applies only for DC power dissipation permitted by absolute maximum ratings.
July. 2007
Rev 1.0
3
MC78L05
VO,OUTPUT VOLTAGE(V)
8.0 6.0
MC78L05 V OUT =5.0V T J =25
4.0
I O =1.0mA I O =100mA
2.0 I O =40mA
0
0
2.0
4.0
6.0
8.0
10
VI,INPUT VOLTAGE(V)
VI-VO,INPUT/OUTPUT DIFFERENTIAL VOLTAGE(V)
TYPICAL PERFORMANCE CHARACTERISTICS 2.5
1.5 I O =40mA
1.0
0
0
IIB,INPUT BIAS CURRENT(mA)
IIB,INPUT BIAS CURRENT(mA)
3.8 3.6 MC78L05 V I =10V V O =5.0V I O =40mA
0 0
25
50
75
25
50
75
100
125
Figure 3. Dropout Voltage versus Junction Temperature
4.0
3.0
Dropout of Regulation is defined as when Vo=2% of Vo
TJ,JUNCTION TEMPERTURE(°C)
4.2
3.2
I O =1.0mA
0.5
Figure 2. Dropout Characteristics
3.4
I O =70mA
2.0
100
125
5.0 4.0
2.0 1.0 0 0
TJ,JUNCTION TEMPERTURE(°C)
MC78L05 V OUT =5.0V I O =40mA T J =25
3.0
5
10
15
20
25
30
35 40
VI,INPUT VOLTAGE(V) Figure 5. Input Bias Current versus Input Voltage
Figure 4. Input Bias Current versus Ambient Temperature
July. 2007
Rev 1.0
4
MC78L05 TYPICAL APPLICATION
1
VI
3
MC78L05LP
VO
2 CI
0.33μF
0.1μF
CO
Figure 6. Fixed Output Regulator
Notes: 1.A common ground is required between the input and the output voltages. 2.The input voltage must remain typically 2.0V above the output voltage even during the low point on the input ripple voltage. 3.CI is required if regulator is located in appreciable distance from power supply filter. 4.CO improves stability and transient response. Values of less than 0.1μF could cause instability.
Input
1
MC78L05LP
Output
3 270μF
RL
2 0.33μF
2N6121 or EQ.
VO VO
100Ω
Figure 7. Load Regulation
Input
5.1Ω
1
MC78L05LP
3
Output
2 RL
0.33μF
470μF 120HZ
+
Figure 8. Ripple Rejection
July. 2007
Rev 1.0
5
OV 30μS
MC78L05 TYPICAL APPLICATION(CONTINUED) 1
Input
MC78L05LP
3
Output
2 0.33μF
R1
0.1μF
VXX
IQ IO
IO=
VXX +IQ R1
RL
Figure 9. Constant Current Regulator
Input
1
MC78L05LP
Output
3
2 7
2 0.1μF
6
0.33μF
3 10k
1.0k 4
MC1741G
VO=7.0V to 20V VIN=VO≥2.0V
Figure 10. Adjustable Output Regulator
RSource
RSC
MJ2955 or Equiv.
Input 0.33μF
R
≥10μF
2N6049 or Equiv. 1
MC78L05LP 2
1.0μF
Figure 11. Short Circuit Protection
July. 2007
Rev 1.0
6
3
Output
MC78L05 TYPICAL APPLICATION(CONTINUED) Output
Input
+ 0.1μF
2 1
MC78L05LP
3
Figure 12. Negative Output Voltage Circuit
D45H11
Input
1mH
Output
470Ω
4.7Ω Z1
1
MC78L05LP
3
2
+ 10μF
0.33μF + 0.5Ω
Figure 13. Switching Regulator
July. 2007
Rev 1.0
7
2000μF
MC78L05 PHYSICAL DIMENSIONS TO-92
July. 2007
8
MC78L05 SOP8L A3
A1
A2
θ1
θ4
B
C
R2
θ3
θ2
A R1
C3
C4
C2
C
C1
B2
D1 D
Symbol A A1 A2 A3 B B1 B2 C C1 C2
Dimension(mm) Max Min 4.95 0.37
Symbol C3
5.15 0.47
C4 D
1.27(TYP) 0.41(TYP)
D1 R1 R2 1 2 3 4
5.80
6.20 4.00 3.80 5.0(TYP) 1.30 0.55 0.55
1.50 0.65 0.65
July. 2007
Rev 1.0
9
Dimension(mm) Min Max 0.05
0.20 0.20(TYP) 1.05(TYP) 0.40 0.60 0.07(TYP) 0.07(TYP) 17 (TYP) 13 (TYP) 4 (TYP) 12 (TYP)
