LMS78_1.5 Series
Wide Input Non-Isolated & Regulated, Single Output
Switching Regulator
Efficiency up to 95%, no
heatsink required
1.5A large current output
Operating temperature:
-40°C ~ +85°C
Short circuit protection,
thermal shutdown
Micro miniature SIP package,
meet UL94-V0 requirement
Ultra low power loss
Industry standard pinout
Pin-out compatible with
LM78XX Linear
Upgraded LMS78_1.5 series switching regulators are ideal replacement
for LM78xx linear regulators and LDOs. The efficiency of up to 95%
means that very little energy is wasted as heat so there is no need for any
heat sinks with their additional space and mounting costs. They are
widely used in industrial control, instrumentation, and electric power
applications.
MTBE>2000,000Hours
Low ripple and noise
Model selection:
LMS78_yy-pp
LM=Series; S=case; ##=Vout; pp=output current
Example:
LMS78_05-1.5
LM=Series; S=SIP Case; ##= 5Vout; pp=1.5A
RoHS
Output specifications
Common specifications
Item
Test conditions
Min Typ
2
Max
3
Units
%
Temperature rise at full load:
Cooling:
25°C MAX, 15°C TYP
Free air convection
Output voltage
accuracy
100% full load, input
voltage range
Operating temperature range:
-40°C~+85°C (above 71°C power
derating)
Line regulation
Vin= min. to max. at
full load
0.5
0.75
%
Storage temperature range:
Lead temperature:
-55°C ~+125°C
Load regulation
Ripple + Noise*
10% to 100% load
0.5
20
1.0
45
%
300°C MAX, 1.5mm from case for 10 sec
100°C MAX
20MHz Bandwidth
(refer to Test configura-
tions, 1)
mVp-p
Operating case temperature:
Storage humidity range:
Package material:
< 95%
Short circuit input
power
0.5
1.8
W
Plastic [UL94-V0]
MTBF:
>2,000,000 hours
(25°C,MIL-HDBK-217F)
Short circuit
protection
Continuous, automatic recovery
Package weight:
4.0g
Switching frequency Full load, input voltage 300 340
range
380
10
KHz
Conducted emissions (Refer to Figure 5) EN55022
CLASS B
CLASS B
Radiated emissions
ESD
EN55022
Quiescent current
Thermal shutdown
Output current limit
5
mA
°C
Internal IC junction
150
5000
EN61000-4-2 Level 3 6kV/8kV perf.
Criteria B
mA
Temperature
coefficient
-40 °C to +85 °C
ambient
0.02 %/°C
Note:
1. All specifications measured at Ta=25°C, humidity<75%, nominal input
voltage(12V) and rated output load unless otherwise specified.
2. Only typical models listed, other models may be different, please contact our
technical person for more details.
Max capacitance
load
1000 μF
3. In this datasheet, all the test methods of indications are based on corporate
standards.
*Test ripple and noise by “parallel cable” method.
Part Number
Input Voltage Range
[VDC]
Output Voltage
[VDC]
Output Current
[mA]
Efficiency
[Vin. min]
Efficiency
[Vin. max]
LMS78_1.5-1.5
LMS78_1.8-1.5
LMS78_2.5-1.5
LMS78_3.3-1.5
LMS78_05-1.5
LMS78_6.5-1.5
4.75-18
4.75-18
4.75-18
4.75-18
6.5-18
8-18
1.5
1.8
2.5
3.3
5
1500
1500
1500
1500
1500
1500
83
85
88
91
93
95
78
81
85
88
91
93
6.5
Add suffix “L” for 90° bend pins, for example: LMS78_05-1.5L.
Page 1 of 4
LMS78_1.5 – Rev. 2012-1.1
Specifications subject to change without notice.
GAPTEC-Electronic GmbH & Co. KG
sales@gaptec-electronic.com – www.gaptec-electronic.com