CYStech Electronics Corp.
Spec. No. : C515M3
Issued Date : 2003.04.02
Revised Date : 2005.01.11 .
Page No. : 1/4
LM78L05XM3 CYStek Product Specification
Low Current Positive Voltage Regulator
LM78L05XM3
Description
The LM78L05XM3 series of surface mount regulators are easy-to-
use devices suitable for multitude of applications that require a regulated supply of up to 100mA. These regulators
feature internal current limiting and thermal shutdown, making them remarkably rugged. No external components are
required with the LM78L05XM3 devices in many applications.
These devices offer a substantial performance advantage over the traditional zener diode resistor combination, as
output impedance and quiescent current are substantially reduced.
Features:
• Wide Range Of Available, Fixed Output Voltages
• Internal Short-Circuit Current Limiting
• Internal Thermal Overload Protection
• No External Components Required
• Pb-free package
Absolute Maximum Ratings (Ta=25°C)
• Input Voltage....................................................................................................................................................... 30 V
• Total Power Dissipation.................................................................................................................. Internally limited
• Operating Temperature Range .......................................................................................................... 0 °C to +125 °C
• Maximum Junction Temperature ..................................................................................................................... 125 °C
• Storage Temperature Range........................................................................................................... -55 °C to +150 °C
• Lead Temperature (Soldering 10S).................................................................................................................. 260 °C
Typical Application
Schematic Diagram
LM78L05 Vout Vin
1
3
2
C1 C2
A common ground is required between the
input and the output voltages. The input
voltage must remain typically 2.0V above
the output voltage even during the low point
on the input ripple voltage.
Note : C1 and C2 are required if regulator is located
far from power supply filter and load, or oscillation
may induced on the loop.
576
3.41K
3.89K
7.8K
2.84K
13K
5pF
2.23K
GND
1.5K 1.9K
100
100
5K
5.7K
Vout
Vin
SOT-89
O G I
CYStech Electronics Corp.
Spec. No. : C515M3
Issued Date : 2003.04.02
Revised Date : 2005.01.11 .
Page No. : 2/4
LM78L05XM3 CYStek Product Specification
Electrical Characteristics
Vin=10V, Io=40mA, Tj=25°C Cin=0.33uF, Cout=0.1uF (unless otherwise noted)
LM78L05A
Symbol Parameter Conditions Min Typ Max Units
Tj=25°C 4.85 5 5.15
7V≤Vin≤25V, 1mA≤Io≤40mA 4.75 5 5.25
Vo Output Voltage
1mA≤Io≤70mA 4.75 5 5.25
V
7V≤Vin≤20V - - 150
∆Vo Line Regulation 8V≤Vin≤20V - - 100 mV
1mA≤Io≤100mA - - 60
∆Vo Load Regulation 1mA≤Io≤40mA - - 30
mV
IQ Quiescent Current Ta=25°C - - 5 mA
8V≤Vin≤20V - - 1
∆IQ Quiescent Current
Change 1mA≤Io≤40mA - - 0.1
mA
Vn Output Noise Voltage
10Hz≤f≤100KHz - 40 - uV
∆Vin / ∆Vo u t Ripple Rejection 8V≤Vin≤16V, f=120Hz 47 62 - dB
Ipk Peak Output Current Ta=25°C - 140 - mA
VD Dropout Voltage Ta=25°C - 1.7 - V
LM78L05B
Symbol Parameter Conditions Min Typ Max Units
Tj=25°C 4.75 5 5.25
7V≤Vin≤25V, 1mA≤Io≤40mA 4.75 5 5.25
Vo Output Voltage
1mA≤Io≤70mA 4.75 5 5.25
V
7V≤Vin≤20V - - 150
∆Vo Line Regulation 8V≤Vin≤20V - - 100 mV
1mA≤Io≤100mA - - 60
∆Vo Load Regulation 1mA≤Io≤40mA - - 30
mV
IQ Quiescent Current Ta=25°C - - 5 mA
8V≤Vin≤20V - - 1
∆IQ Quiescent Current
Change 1mA≤Io≤40mA - - 0.1
mA
Vn Output Noise Voltage
10Hz≤f≤100KHz - 40 - uV
∆Vin / ∆Vo u t Ripple Rejection 8V≤Vin≤16V, f=120Hz 47 62 - dB
Ipk Peak Output Current Ta=25°C - 140 - mA
VD Dropout Voltage Ta=25°C - 1.7 - V
CYStech Electronics Corp.
Spec. No. : C515M3
Issued Date : 2003.04.02
Revised Date : 2005.01.11 .
Page No. : 3/4
LM78L05XM3 CYStek Product Specification
Characteristic Curves
Dropout Characteristics
1
2
3
4
5
6
012345678910
Input Voltage(V)
Output Voltage(V)
Io=100mA
Io=1mA
Io=40mA
Maximum Average Power Dissipation
100
1000
10000
25 50 75 100 125 150
Ambient Temperature (°C)
Power Dissipation (mW)
Quiescent Current
0
0.5
1
1.5
2
2.5
3
3.5
4
0 5 10 15 20 25 30 35
Input Voltage(V)
Quiescent Current(mA)
Quiescent Current
2.6
2.8
3
3.2
3.4
050100150
Ambient Temperature(°C)
Quiescent Current(mA)
CYStech Electronics Corp.
Spec. No. : C515M3
Issued Date : 2003.04.02
Revised Date : 2005.01.11 .
Page No. : 4/4
LM78L05XM3 CYStek Product Specification
SOT-89 Dimension
*: Typical
Inches Millimeters Inches Millimeters
DIM Min. Max. Min. Max.
DIM Min. Max. Min. Max.
A 0.1732 0.1811 4.40 4.60 F 0.0583 0.0598 1.48 1.527
B 0.1594 0.1673 4.05 4.25 G 0.1165 0.1197 2.96 3.04
C 0.0591 0.0663 1.50 1.70 H 0.0551 0.0630 1.40 1.60
D 0.0945 0.1024 2.40 2.60 I 0.0138 0.0161 0.35 0.41
E 0.01417 0.0201 0.36 0.51
Notes: 1.Controlling dimension: millimeters.
2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material.
3.If there is any question with packing specification or packing method, please contact your local CYStek sales office.
Material:
• Lead: 42 Alloy ; solder plating
• Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0
Important Notice:
• All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of CYStek.
• CYStek reserves the right to make changes to its products without notice.
• CYStek semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems.
• CYStek assumes no liability for any consequence of customer product design, infringement of patents, or application assistance.
78L05
3-Lead SOT-89 Plastic
Surface Mounted Package
CYStek Package Code: M3
E
F
G
C
B
A
I
D
H
3
2
1
Marking:
Style: Pin 1. Vout 2. GND 3. Vin
78L05
