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LC78_2.0 Cost effective Series
Wide Input, Non-Isolated & Regulated, Single Output
Switching Regulator
High performance switching
regulator
Low profile
(L*W*H=11.6*7.5*10.2)
Wide 4.5V to 30V operating
input voltage range
Common specifications
Short circut protection: Continuous, automatic recovery
Temperature rise at full load: 40°C MAX
Cooling: Free air convection
Operation temperature range: -40°C~+85°C (with derating)
Storage temperature range: -55°C ~+125°C
Lead temperature: 300°C MAX, 1.5mm from case for 10 sec
Operating case temperature: 110°C MAX
Case thermal impendance: 70°C/W
Temperature coefficient: -40°C to +85°C ambient
Storage humidity range: < 95%
MTBF (using MIL-HDBK-217F): +25°C 2068x103 hours
Packing quantities: 42pcs per Tube
Case material: Non Conductive Black Plastic UL94-V0
Potting material: Epoxy UL94-V0
Soldering profile: 265°C/10sec. MAX
Weight: 1.5g
Note:
1. All specifications measured at TA=25°C, humidity<75%, nominal input voltage
and rated output load unless otherwise specified.
2. Only typical models listed. If you need other model, please confirm the power,
input voltage and output voltage, and then phone us.
High efficiency up to 97%
Compatible with LM78
pin-out
Short circuit protection (SCP)
No Heat Sink Required
Low Quiescent Current
0.02%/°C MAX
+60°C 975x103 hours
The LC78_1.5 & LC78_2.0 series cost effective high efficiency
switching regulators are ideally suited to replace LM78xx linear
regulators and are pin compatible.
Model selection:
LC78_yy-pp
LC=Series; yy=Vout; pp=output current
Example:
LC78_05-2.0
LC=Series; ##= 5Vout; pp=2.0A
Output specifications
Item Test conditions Min Typ Max Units
Output voltage
accuracy
Output current
Output shorted
current limit
Internal power
dissipation
Line regulation Vin= min. to max. at
Load regulation 10% to 100% load 40 mV
Ripple + Noise Vo=5.0VDC at 20MHz
Dynamic load
stability
Switching frequency 600 KHz
No load input
current
Thermal shutdown Internal IC junction 150 °C
Max capacitance
load
full load ±3 %
Vout= 0VDC 3.0 A
0.7 W
0.4 %
full load
100 mVp-p
Bandwidth
100%<->50% load ±150 mV
250 uA
100 μF
Part Number Input Voltage
Range [VDC]
LC78_1.8-2.0 4.5-30 1.8 2.0 89 81 1000
LC78_2.5-2.0 4.5-30 2.5 2.0 91 84 1000
LC78_03-2.0 4.5-30 3.3 2.0 92 88 1000
LC78_05-2.0 6.5-30 5 2.0 94 91 1000
LC78_12-1.5 15-30 12 1.5 97 94 470
Output Voltage
[VDC]
Output Current
[A]
Efficiency
[Vin. min]
Efficiency
[Vin. max]
Capacitive load
[uF; max]
GAPTEC-Electronic GmbH & Co. KG
sales@gaptec-electronic.com – www.gaptec-electronic.com
Specifications subject to change without notice.
LC78_2.0 – Rev. 2016-1.3
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LC78_2.0 Cost effective Series
Wide Input Non-Isolated & Regulated, Single Output
Typical characteristics
Derating Graph (Natural convection)
Efficiency Vs Vin (Full Load)
Output power (%)
Operating Temperature (°C)
Standard application circuit
Mechanical dimensions
Front view
marking
Right
view
Efficiency (%)
Input voltage (V)
Tube outline dimensions
Note:
L=520 ± 2 mm
Devices per tube quantity: 42 PCS
Top view
Tolerance:
XX.X ± 0.25 mm
XX.XX ± 0.15 mm
GAPTEC-Electronic GmbH & Co. KG
sales@gaptec-electronic.com – www.gaptec-electronic.com
LC78_2.0 – Rev. 2016-1.3
Page 2 of 2
Specifications subject to change without notice.
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