Sanyo L78MS05J 5v constant-voltage power supply with strobe line Datasheet

Ordering number : EN7161
L78MS05J
L78MS05JSMP
Monolithic Linear IC
5V Constant-Voltage
Power Supply with
Strobe Line
Overview
The L78MS05J and L78MS05JSMP are general-purpose constant voltage power supplies that feature an output current of
500mA and a built-in on/off function. The current drain in the output off state is low, making these devices effective for
reducing power consumption in application equipment. The surface mounting package can contribute to miniaturization
and improved efficiency. These devices are optimal for use in all types of AV and OA equipment and in automotive
applications (such as power supplies for meters) as well.
Functions
• Strobe pin that controls the on/off state of the output voltage (active low input).
• 500mA output current.
Features
• TO-220-5H package for easier mounting and thermal design (L78MS05J).
• SMP5 package for easier mounting and thermal design (L78MS05JSMP).
• Low output off state current drain makes these devices optimal for saving power in applications.
• Full complement of built-in protection circuits (current limiter and thermal protection circuit).
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum input voltage
VIN max
35
V
Maximum strobe pin voltage
VST max
VIN max
V
Continued on next page.
Any and all SANYO Semiconductor products described or contained herein do not have specifications
that can handle applications that require extremely high levels of reliability, such as life-support systems,
aircraft's control systems, or other applications whose failure can be reasonably expected to result in
serious physical and/or material damage. Consult with your SANYO Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor assumes no responsibility for equipment failures that result from using products
at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor
products described or contained herein.
92706 / 10606 MS OT B8-5886 No.7161-1/7
L78MS05J/L78S05JSMP
Continued from preceding page.
Parameter
Allowable power dissipation
Symbol
Conditions
Pd max
L78MS05J - independent IC
L78MS05J SMP *: When mounted on the
stipulated circuit
board 1
*: When mounted on the
stipulated circuit
board 2
Ratings
Unit
1.75
W
3.9
W
2.0
W
Operating temperature
Topr
-40 to +85
°C
Operating temperature
Tstg
-58 to +150
°C
*: Stipulated circuit board 1:
76.1×114.3×1.6mm³ Cooper foil ratio: 60% FR4
Heat sink fin mounting area pattern: 23% [2000mm²]
*: Stipulated circuit board 2:
140×300×1.6mm³ Cooper foil ratio: 60% FR4
Allowable Operating Conditions at Ta = 25°C
Parameter
Symbol
Input voltage
Conditions
Ratings
VIN
Unit
7.5 to 20.0
V
Output current
LOUT
0 to 500
mA
Output on control voltage
VSTL
-0.3 to 0.8
V
Output off control voltage
VSTH
2.0 to VIN
mA
Electrical Characteristics at Ta = 25°C, VIN = 10V, IOUT = 350mA
Parameter
Symbol
Ratings
Conditions
min
Unit
typ
max
[Output On State, VST = low]
Output voltage 1
VOUT1
Line regulation 1
∆VOLN1
5.0
5.2
V
7V ≤ VIN ≤ 25V, IOUT = 200mA
Line regulation 2
Load regulation 1
3
50
mV
∆VOLN2
8V ≤ VIN ≤ 20V, IOUT = 200mA
1
25
mV
∆VOLD1
5mA ≤ IOUT ≤ 500mA
100
mV
Load regulation 2
∆VOLD2
5mA ≤ IOUT ≤ 200mA
50
mV
Output voltage 2
VOUT2
7V ≤ VIN ≤ 20V, 5mA ≤ IOUT ≤ 350mA
Current drain
4.8
4.75
IQ
1.9
Output noise voltage
VNO
10Hz ≤ f ≤ 100kHz
Ripple rejection
Rrej1
f = 120Hz, 8V ≤ VIN ≤ 19V, IOUT = 100mA
60
Rrej2
f = 120H, 8V ≤ VIN ≤ 19V, IOUT = 300mA
60
Minimum input to
Vdrop
IOUT = 350mA
5.25
V
5.0
mA
90
µVrms
63
dB
54
dB
2.0
V
output voltage drop
Output on control
VSTL
0.8
V
voltage
Short circuit current
IOSC
Peak output current
IOP
VIN = 35V, for GND
300
mA
700
mA
[Output Off State, VST = high]
Low-level output
VOOFF
VST = 5V
20
200
mV
Quiescent current
IQOFF
VST = 5V, except for ISTB
35
40
µA
Output off control
VSTH
VIN
V
voltage
2.0
voltage
[Thermal Protection]
Operating
TTSD
Design target value*
150
180
°C
temperature
* This rating is a design target value and is not measured.
No.7161-2/7
L78MS05J/L78S05JSMP
Package Dimensions
unit : mm
3079A
[L78MS05J]
3275
[L78MS05J]
[L78MS05JSMP]
[L78MS05JSMP]
Pin Arrangement
[L78MS05J]
[L78MS05JSMP]
L78MS05J
L78MS05J
1:VIN
2:NC
3:GND
1:VIN
2:NC
3:GND
1
5
Top view
4:STB
5:VOUT
1
5
4:STB
5:VOUT
Top view
Note: NC pins must not be used (Pin number 2 in the pin arrangement)
No.7161-3/7
L78MS05J/L78S05JSMP
Block Diagram
Stipulated Test Circuits
Application Notes
Notes: 1. CIN and COUT must be located as close as possible to the IC to stabilize IC operation.
2. COUT must be 0.1µF or larger, and a capacitor (such as a tantalum capacitor) with a low temperature
coefficient must be used to prevent oscillation at low temperatures.
3. If the STB pin is open, the internal bias will result in the output going to the on state. If the STB function is not
used, the STB pin must be connected to ground to complete the STB operation.
4. Note that a large current will flow if the IC is connected in reverse, that is, if VIN is connected to - and GND is
connected to +.
No.7161-4/7
L78MS05J/L78S05JSMP
Function Table
VOUT
VSTB
VOUT
Low
High
High
Low
0
t
VSTB
0
t
ON/OFF Control Input Block Equivalent Circuit Diagram
No.7161-5/7
L78MS05J/L78S05JSMP
No.7161-6/7
L78MS05J/L78S05JSMP
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performance, characteristics, and functions of the described products in the independent state, and are
not guarantees of the performance, characteristics, and functions of the described products as mounted
in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an
independent device, the customer should always evaluate and test devices mounted in the customer's
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product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO Semiconductor product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
guaranteed for volume production. SANYO Semiconductor believes information herein is accurate and
reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual
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This catalog provides information as of January, 2006. Specifications and information herein are subject
to change without notice.
PS No.7161-7/7
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